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based on coreutils-8.32

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aixiao
2020-09-02 16:47:03 +08:00
parent 90bc173c8c
commit 94bccd8e8d
842 changed files with 296759 additions and 258 deletions
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0
lib/glthread/.deps/.dirstamp Normal file
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lib/glthread/.deps/lock.Po Normal file
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lib/glthread/lock.o: lib/glthread/lock.c /usr/include/stdc-predef.h \
lib/config.h lib/glthread/lock.h /usr/include/errno.h \
/usr/include/features.h /usr/include/x86_64-linux-gnu/sys/cdefs.h \
/usr/include/x86_64-linux-gnu/bits/wordsize.h \
/usr/include/x86_64-linux-gnu/bits/long-double.h \
/usr/include/x86_64-linux-gnu/gnu/stubs.h \
/usr/include/x86_64-linux-gnu/gnu/stubs-64.h \
/usr/include/x86_64-linux-gnu/bits/errno.h /usr/include/linux/errno.h \
/usr/include/x86_64-linux-gnu/asm/errno.h \
/usr/include/asm-generic/errno.h /usr/include/asm-generic/errno-base.h \
/usr/include/x86_64-linux-gnu/bits/types/error_t.h lib/stdlib.h \
/usr/include/stdlib.h \
/usr/include/x86_64-linux-gnu/bits/libc-header-start.h \
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h \
/usr/include/x86_64-linux-gnu/bits/waitflags.h \
/usr/include/x86_64-linux-gnu/bits/waitstatus.h \
/usr/include/x86_64-linux-gnu/bits/floatn.h \
/usr/include/x86_64-linux-gnu/bits/floatn-common.h \
/usr/include/x86_64-linux-gnu/bits/types/locale_t.h \
/usr/include/x86_64-linux-gnu/bits/types/__locale_t.h lib/sys/types.h \
/usr/include/x86_64-linux-gnu/sys/types.h \
/usr/include/x86_64-linux-gnu/bits/types.h \
/usr/include/x86_64-linux-gnu/bits/timesize.h \
/usr/include/x86_64-linux-gnu/bits/typesizes.h \
/usr/include/x86_64-linux-gnu/bits/time64.h \
/usr/include/x86_64-linux-gnu/bits/types/clock_t.h \
/usr/include/x86_64-linux-gnu/bits/types/clockid_t.h \
/usr/include/x86_64-linux-gnu/bits/types/time_t.h \
/usr/include/x86_64-linux-gnu/bits/types/timer_t.h \
/usr/include/x86_64-linux-gnu/bits/stdint-intn.h /usr/include/endian.h \
/usr/include/x86_64-linux-gnu/bits/endian.h \
/usr/include/x86_64-linux-gnu/bits/byteswap.h \
/usr/include/x86_64-linux-gnu/bits/uintn-identity.h lib/sys/select.h \
/usr/include/x86_64-linux-gnu/sys/select.h \
/usr/include/x86_64-linux-gnu/bits/select.h \
/usr/include/x86_64-linux-gnu/bits/types/sigset_t.h \
/usr/include/x86_64-linux-gnu/bits/types/__sigset_t.h \
/usr/include/x86_64-linux-gnu/bits/types/struct_timeval.h \
/usr/include/x86_64-linux-gnu/bits/types/struct_timespec.h \
/usr/include/x86_64-linux-gnu/bits/select2.h \
/usr/include/x86_64-linux-gnu/bits/pthreadtypes.h \
/usr/include/x86_64-linux-gnu/bits/thread-shared-types.h \
/usr/include/x86_64-linux-gnu/bits/pthreadtypes-arch.h lib/alloca.h \
/usr/include/x86_64-linux-gnu/bits/stdlib-bsearch.h \
/usr/include/x86_64-linux-gnu/bits/stdlib-float.h \
/usr/include/x86_64-linux-gnu/bits/stdlib.h /usr/include/threads.h \
lib/time.h /usr/include/time.h /usr/include/x86_64-linux-gnu/bits/time.h \
/usr/include/x86_64-linux-gnu/bits/timex.h \
/usr/include/x86_64-linux-gnu/bits/types/struct_tm.h \
/usr/include/x86_64-linux-gnu/bits/types/struct_itimerspec.h \
lib/pthread.h /usr/include/pthread.h lib/sched.h /usr/include/sched.h \
/usr/include/x86_64-linux-gnu/bits/sched.h \
/usr/include/x86_64-linux-gnu/bits/types/struct_sched_param.h \
/usr/include/x86_64-linux-gnu/bits/cpu-set.h \
/usr/include/x86_64-linux-gnu/bits/setjmp.h
/usr/include/stdc-predef.h:
lib/config.h:
lib/glthread/lock.h:
/usr/include/errno.h:
/usr/include/features.h:
/usr/include/x86_64-linux-gnu/sys/cdefs.h:
/usr/include/x86_64-linux-gnu/bits/wordsize.h:
/usr/include/x86_64-linux-gnu/bits/long-double.h:
/usr/include/x86_64-linux-gnu/gnu/stubs.h:
/usr/include/x86_64-linux-gnu/gnu/stubs-64.h:
/usr/include/x86_64-linux-gnu/bits/errno.h:
/usr/include/linux/errno.h:
/usr/include/x86_64-linux-gnu/asm/errno.h:
/usr/include/asm-generic/errno.h:
/usr/include/asm-generic/errno-base.h:
/usr/include/x86_64-linux-gnu/bits/types/error_t.h:
lib/stdlib.h:
/usr/include/stdlib.h:
/usr/include/x86_64-linux-gnu/bits/libc-header-start.h:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:
/usr/include/x86_64-linux-gnu/bits/waitflags.h:
/usr/include/x86_64-linux-gnu/bits/waitstatus.h:
/usr/include/x86_64-linux-gnu/bits/floatn.h:
/usr/include/x86_64-linux-gnu/bits/floatn-common.h:
/usr/include/x86_64-linux-gnu/bits/types/locale_t.h:
/usr/include/x86_64-linux-gnu/bits/types/__locale_t.h:
lib/sys/types.h:
/usr/include/x86_64-linux-gnu/sys/types.h:
/usr/include/x86_64-linux-gnu/bits/types.h:
/usr/include/x86_64-linux-gnu/bits/timesize.h:
/usr/include/x86_64-linux-gnu/bits/typesizes.h:
/usr/include/x86_64-linux-gnu/bits/time64.h:
/usr/include/x86_64-linux-gnu/bits/types/clock_t.h:
/usr/include/x86_64-linux-gnu/bits/types/clockid_t.h:
/usr/include/x86_64-linux-gnu/bits/types/time_t.h:
/usr/include/x86_64-linux-gnu/bits/types/timer_t.h:
/usr/include/x86_64-linux-gnu/bits/stdint-intn.h:
/usr/include/endian.h:
/usr/include/x86_64-linux-gnu/bits/endian.h:
/usr/include/x86_64-linux-gnu/bits/byteswap.h:
/usr/include/x86_64-linux-gnu/bits/uintn-identity.h:
lib/sys/select.h:
/usr/include/x86_64-linux-gnu/sys/select.h:
/usr/include/x86_64-linux-gnu/bits/select.h:
/usr/include/x86_64-linux-gnu/bits/types/sigset_t.h:
/usr/include/x86_64-linux-gnu/bits/types/__sigset_t.h:
/usr/include/x86_64-linux-gnu/bits/types/struct_timeval.h:
/usr/include/x86_64-linux-gnu/bits/types/struct_timespec.h:
/usr/include/x86_64-linux-gnu/bits/select2.h:
/usr/include/x86_64-linux-gnu/bits/pthreadtypes.h:
/usr/include/x86_64-linux-gnu/bits/thread-shared-types.h:
/usr/include/x86_64-linux-gnu/bits/pthreadtypes-arch.h:
lib/alloca.h:
/usr/include/x86_64-linux-gnu/bits/stdlib-bsearch.h:
/usr/include/x86_64-linux-gnu/bits/stdlib-float.h:
/usr/include/x86_64-linux-gnu/bits/stdlib.h:
/usr/include/threads.h:
lib/time.h:
/usr/include/time.h:
/usr/include/x86_64-linux-gnu/bits/time.h:
/usr/include/x86_64-linux-gnu/bits/timex.h:
/usr/include/x86_64-linux-gnu/bits/types/struct_tm.h:
/usr/include/x86_64-linux-gnu/bits/types/struct_itimerspec.h:
lib/pthread.h:
/usr/include/pthread.h:
lib/sched.h:
/usr/include/sched.h:
/usr/include/x86_64-linux-gnu/bits/sched.h:
/usr/include/x86_64-linux-gnu/bits/types/struct_sched_param.h:
/usr/include/x86_64-linux-gnu/bits/cpu-set.h:
/usr/include/x86_64-linux-gnu/bits/setjmp.h:

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lib/glthread/.deps/threadlib.Po Normal file
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lib/glthread/threadlib.o: lib/glthread/threadlib.c \
/usr/include/stdc-predef.h lib/config.h lib/pthread.h \
/usr/include/pthread.h /usr/include/features.h \
/usr/include/x86_64-linux-gnu/sys/cdefs.h \
/usr/include/x86_64-linux-gnu/bits/wordsize.h \
/usr/include/x86_64-linux-gnu/bits/long-double.h \
/usr/include/x86_64-linux-gnu/gnu/stubs.h \
/usr/include/x86_64-linux-gnu/gnu/stubs-64.h /usr/include/endian.h \
/usr/include/x86_64-linux-gnu/bits/endian.h \
/usr/include/x86_64-linux-gnu/bits/byteswap.h \
/usr/include/x86_64-linux-gnu/bits/types.h \
/usr/include/x86_64-linux-gnu/bits/timesize.h \
/usr/include/x86_64-linux-gnu/bits/typesizes.h \
/usr/include/x86_64-linux-gnu/bits/time64.h \
/usr/include/x86_64-linux-gnu/bits/uintn-identity.h lib/sched.h \
/usr/include/sched.h /usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h \
/usr/include/x86_64-linux-gnu/bits/types/time_t.h \
/usr/include/x86_64-linux-gnu/bits/types/struct_timespec.h \
/usr/include/x86_64-linux-gnu/bits/sched.h \
/usr/include/x86_64-linux-gnu/bits/types/struct_sched_param.h \
/usr/include/x86_64-linux-gnu/bits/cpu-set.h lib/sys/types.h \
/usr/include/x86_64-linux-gnu/sys/types.h \
/usr/include/x86_64-linux-gnu/bits/types/clock_t.h \
/usr/include/x86_64-linux-gnu/bits/types/clockid_t.h \
/usr/include/x86_64-linux-gnu/bits/types/timer_t.h \
/usr/include/x86_64-linux-gnu/bits/stdint-intn.h lib/sys/select.h \
/usr/include/x86_64-linux-gnu/sys/select.h \
/usr/include/x86_64-linux-gnu/bits/select.h \
/usr/include/x86_64-linux-gnu/bits/types/sigset_t.h \
/usr/include/x86_64-linux-gnu/bits/types/__sigset_t.h \
/usr/include/x86_64-linux-gnu/bits/types/struct_timeval.h \
/usr/include/x86_64-linux-gnu/bits/select2.h \
/usr/include/x86_64-linux-gnu/bits/pthreadtypes.h \
/usr/include/x86_64-linux-gnu/bits/thread-shared-types.h \
/usr/include/x86_64-linux-gnu/bits/pthreadtypes-arch.h lib/time.h \
/usr/include/time.h /usr/include/x86_64-linux-gnu/bits/time.h \
/usr/include/x86_64-linux-gnu/bits/timex.h \
/usr/include/x86_64-linux-gnu/bits/types/struct_tm.h \
/usr/include/x86_64-linux-gnu/bits/types/struct_itimerspec.h \
/usr/include/x86_64-linux-gnu/bits/types/locale_t.h \
/usr/include/x86_64-linux-gnu/bits/types/__locale_t.h \
/usr/include/x86_64-linux-gnu/bits/setjmp.h lib/stdlib.h \
/usr/include/stdlib.h \
/usr/include/x86_64-linux-gnu/bits/libc-header-start.h \
/usr/include/x86_64-linux-gnu/bits/waitflags.h \
/usr/include/x86_64-linux-gnu/bits/waitstatus.h \
/usr/include/x86_64-linux-gnu/bits/floatn.h \
/usr/include/x86_64-linux-gnu/bits/floatn-common.h lib/alloca.h \
/usr/include/x86_64-linux-gnu/bits/stdlib-bsearch.h \
/usr/include/x86_64-linux-gnu/bits/stdlib-float.h \
/usr/include/x86_64-linux-gnu/bits/stdlib.h /usr/include/errno.h \
/usr/include/x86_64-linux-gnu/bits/errno.h /usr/include/linux/errno.h \
/usr/include/x86_64-linux-gnu/asm/errno.h \
/usr/include/asm-generic/errno.h /usr/include/asm-generic/errno-base.h \
/usr/include/x86_64-linux-gnu/bits/types/error_t.h
/usr/include/stdc-predef.h:
lib/config.h:
lib/pthread.h:
/usr/include/pthread.h:
/usr/include/features.h:
/usr/include/x86_64-linux-gnu/sys/cdefs.h:
/usr/include/x86_64-linux-gnu/bits/wordsize.h:
/usr/include/x86_64-linux-gnu/bits/long-double.h:
/usr/include/x86_64-linux-gnu/gnu/stubs.h:
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/usr/include/endian.h:
/usr/include/x86_64-linux-gnu/bits/endian.h:
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lib/sched.h:
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/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:
/usr/include/x86_64-linux-gnu/bits/types/time_t.h:
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/usr/include/x86_64-linux-gnu/bits/sched.h:
/usr/include/x86_64-linux-gnu/bits/types/struct_sched_param.h:
/usr/include/x86_64-linux-gnu/bits/cpu-set.h:
lib/sys/types.h:
/usr/include/x86_64-linux-gnu/sys/types.h:
/usr/include/x86_64-linux-gnu/bits/types/clock_t.h:
/usr/include/x86_64-linux-gnu/bits/types/clockid_t.h:
/usr/include/x86_64-linux-gnu/bits/types/timer_t.h:
/usr/include/x86_64-linux-gnu/bits/stdint-intn.h:
lib/sys/select.h:
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/usr/include/x86_64-linux-gnu/bits/select.h:
/usr/include/x86_64-linux-gnu/bits/types/sigset_t.h:
/usr/include/x86_64-linux-gnu/bits/types/__sigset_t.h:
/usr/include/x86_64-linux-gnu/bits/types/struct_timeval.h:
/usr/include/x86_64-linux-gnu/bits/select2.h:
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lib/time.h:
/usr/include/time.h:
/usr/include/x86_64-linux-gnu/bits/time.h:
/usr/include/x86_64-linux-gnu/bits/timex.h:
/usr/include/x86_64-linux-gnu/bits/types/struct_tm.h:
/usr/include/x86_64-linux-gnu/bits/types/struct_itimerspec.h:
/usr/include/x86_64-linux-gnu/bits/types/locale_t.h:
/usr/include/x86_64-linux-gnu/bits/types/__locale_t.h:
/usr/include/x86_64-linux-gnu/bits/setjmp.h:
lib/stdlib.h:
/usr/include/stdlib.h:
/usr/include/x86_64-linux-gnu/bits/libc-header-start.h:
/usr/include/x86_64-linux-gnu/bits/waitflags.h:
/usr/include/x86_64-linux-gnu/bits/waitstatus.h:
/usr/include/x86_64-linux-gnu/bits/floatn.h:
/usr/include/x86_64-linux-gnu/bits/floatn-common.h:
lib/alloca.h:
/usr/include/x86_64-linux-gnu/bits/stdlib-bsearch.h:
/usr/include/x86_64-linux-gnu/bits/stdlib-float.h:
/usr/include/x86_64-linux-gnu/bits/stdlib.h:
/usr/include/errno.h:
/usr/include/x86_64-linux-gnu/bits/errno.h:
/usr/include/linux/errno.h:
/usr/include/x86_64-linux-gnu/asm/errno.h:
/usr/include/asm-generic/errno.h:
/usr/include/asm-generic/errno-base.h:
/usr/include/x86_64-linux-gnu/bits/types/error_t.h:

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lib/glthread/tls.o: lib/glthread/tls.c /usr/include/stdc-predef.h \
lib/config.h lib/glthread/tls.h /usr/include/errno.h \
/usr/include/features.h /usr/include/x86_64-linux-gnu/sys/cdefs.h \
/usr/include/x86_64-linux-gnu/bits/wordsize.h \
/usr/include/x86_64-linux-gnu/bits/long-double.h \
/usr/include/x86_64-linux-gnu/gnu/stubs.h \
/usr/include/x86_64-linux-gnu/gnu/stubs-64.h \
/usr/include/x86_64-linux-gnu/bits/errno.h /usr/include/linux/errno.h \
/usr/include/x86_64-linux-gnu/asm/errno.h \
/usr/include/asm-generic/errno.h /usr/include/asm-generic/errno-base.h \
/usr/include/x86_64-linux-gnu/bits/types/error_t.h lib/stdlib.h \
/usr/include/stdlib.h \
/usr/include/x86_64-linux-gnu/bits/libc-header-start.h \
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h \
/usr/include/x86_64-linux-gnu/bits/waitflags.h \
/usr/include/x86_64-linux-gnu/bits/waitstatus.h \
/usr/include/x86_64-linux-gnu/bits/floatn.h \
/usr/include/x86_64-linux-gnu/bits/floatn-common.h \
/usr/include/x86_64-linux-gnu/bits/types/locale_t.h \
/usr/include/x86_64-linux-gnu/bits/types/__locale_t.h lib/sys/types.h \
/usr/include/x86_64-linux-gnu/sys/types.h \
/usr/include/x86_64-linux-gnu/bits/types.h \
/usr/include/x86_64-linux-gnu/bits/timesize.h \
/usr/include/x86_64-linux-gnu/bits/typesizes.h \
/usr/include/x86_64-linux-gnu/bits/time64.h \
/usr/include/x86_64-linux-gnu/bits/types/clock_t.h \
/usr/include/x86_64-linux-gnu/bits/types/clockid_t.h \
/usr/include/x86_64-linux-gnu/bits/types/time_t.h \
/usr/include/x86_64-linux-gnu/bits/types/timer_t.h \
/usr/include/x86_64-linux-gnu/bits/stdint-intn.h /usr/include/endian.h \
/usr/include/x86_64-linux-gnu/bits/endian.h \
/usr/include/x86_64-linux-gnu/bits/byteswap.h \
/usr/include/x86_64-linux-gnu/bits/uintn-identity.h lib/sys/select.h \
/usr/include/x86_64-linux-gnu/sys/select.h \
/usr/include/x86_64-linux-gnu/bits/select.h \
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/usr/include/x86_64-linux-gnu/bits/types/__sigset_t.h \
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/usr/include/x86_64-linux-gnu/bits/types/struct_timespec.h \
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/usr/include/x86_64-linux-gnu/bits/stdlib-float.h \
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lib/time.h /usr/include/time.h /usr/include/x86_64-linux-gnu/bits/time.h \
/usr/include/x86_64-linux-gnu/bits/timex.h \
/usr/include/x86_64-linux-gnu/bits/types/struct_tm.h \
/usr/include/x86_64-linux-gnu/bits/types/struct_itimerspec.h \
lib/pthread.h /usr/include/pthread.h lib/sched.h /usr/include/sched.h \
/usr/include/x86_64-linux-gnu/bits/sched.h \
/usr/include/x86_64-linux-gnu/bits/types/struct_sched_param.h \
/usr/include/x86_64-linux-gnu/bits/cpu-set.h \
/usr/include/x86_64-linux-gnu/bits/setjmp.h
/usr/include/stdc-predef.h:
lib/config.h:
lib/glthread/tls.h:
/usr/include/errno.h:
/usr/include/features.h:
/usr/include/x86_64-linux-gnu/sys/cdefs.h:
/usr/include/x86_64-linux-gnu/bits/wordsize.h:
/usr/include/x86_64-linux-gnu/bits/long-double.h:
/usr/include/x86_64-linux-gnu/gnu/stubs.h:
/usr/include/x86_64-linux-gnu/gnu/stubs-64.h:
/usr/include/x86_64-linux-gnu/bits/errno.h:
/usr/include/linux/errno.h:
/usr/include/x86_64-linux-gnu/asm/errno.h:
/usr/include/asm-generic/errno.h:
/usr/include/asm-generic/errno-base.h:
/usr/include/x86_64-linux-gnu/bits/types/error_t.h:
lib/stdlib.h:
/usr/include/stdlib.h:
/usr/include/x86_64-linux-gnu/bits/libc-header-start.h:
/usr/lib/gcc/x86_64-linux-gnu/9/include/stddef.h:
/usr/include/x86_64-linux-gnu/bits/waitflags.h:
/usr/include/x86_64-linux-gnu/bits/waitstatus.h:
/usr/include/x86_64-linux-gnu/bits/floatn.h:
/usr/include/x86_64-linux-gnu/bits/floatn-common.h:
/usr/include/x86_64-linux-gnu/bits/types/locale_t.h:
/usr/include/x86_64-linux-gnu/bits/types/__locale_t.h:
lib/sys/types.h:
/usr/include/x86_64-linux-gnu/sys/types.h:
/usr/include/x86_64-linux-gnu/bits/types.h:
/usr/include/x86_64-linux-gnu/bits/timesize.h:
/usr/include/x86_64-linux-gnu/bits/typesizes.h:
/usr/include/x86_64-linux-gnu/bits/time64.h:
/usr/include/x86_64-linux-gnu/bits/types/clock_t.h:
/usr/include/x86_64-linux-gnu/bits/types/clockid_t.h:
/usr/include/x86_64-linux-gnu/bits/types/time_t.h:
/usr/include/x86_64-linux-gnu/bits/types/timer_t.h:
/usr/include/x86_64-linux-gnu/bits/stdint-intn.h:
/usr/include/endian.h:
/usr/include/x86_64-linux-gnu/bits/endian.h:
/usr/include/x86_64-linux-gnu/bits/byteswap.h:
/usr/include/x86_64-linux-gnu/bits/uintn-identity.h:
lib/sys/select.h:
/usr/include/x86_64-linux-gnu/sys/select.h:
/usr/include/x86_64-linux-gnu/bits/select.h:
/usr/include/x86_64-linux-gnu/bits/types/sigset_t.h:
/usr/include/x86_64-linux-gnu/bits/types/__sigset_t.h:
/usr/include/x86_64-linux-gnu/bits/types/struct_timeval.h:
/usr/include/x86_64-linux-gnu/bits/types/struct_timespec.h:
/usr/include/x86_64-linux-gnu/bits/select2.h:
/usr/include/x86_64-linux-gnu/bits/pthreadtypes.h:
/usr/include/x86_64-linux-gnu/bits/thread-shared-types.h:
/usr/include/x86_64-linux-gnu/bits/pthreadtypes-arch.h:
lib/alloca.h:
/usr/include/x86_64-linux-gnu/bits/stdlib-bsearch.h:
/usr/include/x86_64-linux-gnu/bits/stdlib-float.h:
/usr/include/x86_64-linux-gnu/bits/stdlib.h:
/usr/include/threads.h:
lib/time.h:
/usr/include/time.h:
/usr/include/x86_64-linux-gnu/bits/time.h:
/usr/include/x86_64-linux-gnu/bits/timex.h:
/usr/include/x86_64-linux-gnu/bits/types/struct_tm.h:
/usr/include/x86_64-linux-gnu/bits/types/struct_itimerspec.h:
lib/pthread.h:
/usr/include/pthread.h:
lib/sched.h:
/usr/include/sched.h:
/usr/include/x86_64-linux-gnu/bits/sched.h:
/usr/include/x86_64-linux-gnu/bits/types/struct_sched_param.h:
/usr/include/x86_64-linux-gnu/bits/cpu-set.h:
/usr/include/x86_64-linux-gnu/bits/setjmp.h:

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/* Locking in multithreaded situations.
Copyright (C) 2005-2020 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2005.
Based on GCC's gthr-posix.h, gthr-posix95.h. */
#include <config.h>
#include "glthread/lock.h"
/* ========================================================================= */
#if USE_ISOC_THREADS || USE_ISOC_AND_POSIX_THREADS
/* -------------------------- gl_lock_t datatype -------------------------- */
int
glthread_lock_init (gl_lock_t *lock)
{
if (mtx_init (&lock->mutex, mtx_plain) != thrd_success)
return ENOMEM;
lock->init_needed = 0;
return 0;
}
int
glthread_lock_lock (gl_lock_t *lock)
{
if (lock->init_needed)
call_once (&lock->init_once, lock->init_func);
if (mtx_lock (&lock->mutex) != thrd_success)
return EAGAIN;
return 0;
}
int
glthread_lock_unlock (gl_lock_t *lock)
{
if (lock->init_needed)
call_once (&lock->init_once, lock->init_func);
if (mtx_unlock (&lock->mutex) != thrd_success)
return EINVAL;
return 0;
}
int
glthread_lock_destroy (gl_lock_t *lock)
{
if (lock->init_needed)
call_once (&lock->init_once, lock->init_func);
mtx_destroy (&lock->mutex);
return 0;
}
/* ------------------------- gl_rwlock_t datatype ------------------------- */
int
glthread_rwlock_init (gl_rwlock_t *lock)
{
if (mtx_init (&lock->lock, mtx_plain) != thrd_success
|| cnd_init (&lock->waiting_readers) != thrd_success
|| cnd_init (&lock->waiting_writers) != thrd_success)
return ENOMEM;
lock->waiting_writers_count = 0;
lock->runcount = 0;
lock->init_needed = 0;
return 0;
}
int
glthread_rwlock_rdlock (gl_rwlock_t *lock)
{
if (lock->init_needed)
call_once (&lock->init_once, lock->init_func);
if (mtx_lock (&lock->lock) != thrd_success)
return EAGAIN;
/* Test whether only readers are currently running, and whether the runcount
field will not overflow, and whether no writer is waiting. The latter
condition is because POSIX recommends that "write locks shall take
precedence over read locks", to avoid "writer starvation". */
while (!(lock->runcount + 1 > 0 && lock->waiting_writers_count == 0))
{
/* This thread has to wait for a while. Enqueue it among the
waiting_readers. */
if (cnd_wait (&lock->waiting_readers, &lock->lock) != thrd_success)
{
mtx_unlock (&lock->lock);
return EINVAL;
}
}
lock->runcount++;
if (mtx_unlock (&lock->lock) != thrd_success)
return EINVAL;
return 0;
}
int
glthread_rwlock_wrlock (gl_rwlock_t *lock)
{
if (lock->init_needed)
call_once (&lock->init_once, lock->init_func);
if (mtx_lock (&lock->lock) != thrd_success)
return EAGAIN;
/* Test whether no readers or writers are currently running. */
while (!(lock->runcount == 0))
{
/* This thread has to wait for a while. Enqueue it among the
waiting_writers. */
lock->waiting_writers_count++;
if (cnd_wait (&lock->waiting_writers, &lock->lock) != thrd_success)
{
lock->waiting_writers_count--;
mtx_unlock (&lock->lock);
return EINVAL;
}
lock->waiting_writers_count--;
}
lock->runcount--; /* runcount becomes -1 */
if (mtx_unlock (&lock->lock) != thrd_success)
return EINVAL;
return 0;
}
int
glthread_rwlock_unlock (gl_rwlock_t *lock)
{
if (lock->init_needed)
call_once (&lock->init_once, lock->init_func);
if (mtx_lock (&lock->lock) != thrd_success)
return EAGAIN;
if (lock->runcount < 0)
{
/* Drop a writer lock. */
if (!(lock->runcount == -1))
{
mtx_unlock (&lock->lock);
return EINVAL;
}
lock->runcount = 0;
}
else
{
/* Drop a reader lock. */
if (!(lock->runcount > 0))
{
mtx_unlock (&lock->lock);
return EINVAL;
}
lock->runcount--;
}
if (lock->runcount == 0)
{
/* POSIX recommends that "write locks shall take precedence over read
locks", to avoid "writer starvation". */
if (lock->waiting_writers_count > 0)
{
/* Wake up one of the waiting writers. */
if (cnd_signal (&lock->waiting_writers) != thrd_success)
{
mtx_unlock (&lock->lock);
return EINVAL;
}
}
else
{
/* Wake up all waiting readers. */
if (cnd_broadcast (&lock->waiting_readers) != thrd_success)
{
mtx_unlock (&lock->lock);
return EINVAL;
}
}
}
if (mtx_unlock (&lock->lock) != thrd_success)
return EINVAL;
return 0;
}
int
glthread_rwlock_destroy (gl_rwlock_t *lock)
{
if (lock->init_needed)
call_once (&lock->init_once, lock->init_func);
mtx_destroy (&lock->lock);
cnd_destroy (&lock->waiting_readers);
cnd_destroy (&lock->waiting_writers);
return 0;
}
/* --------------------- gl_recursive_lock_t datatype --------------------- */
int
glthread_recursive_lock_init (gl_recursive_lock_t *lock)
{
if (mtx_init (&lock->mutex, mtx_plain | mtx_recursive) != thrd_success)
return ENOMEM;
lock->init_needed = 0;
return 0;
}
int
glthread_recursive_lock_lock (gl_recursive_lock_t *lock)
{
if (lock->init_needed)
call_once (&lock->init_once, lock->init_func);
if (mtx_lock (&lock->mutex) != thrd_success)
return EAGAIN;
return 0;
}
int
glthread_recursive_lock_unlock (gl_recursive_lock_t *lock)
{
if (lock->init_needed)
call_once (&lock->init_once, lock->init_func);
if (mtx_unlock (&lock->mutex) != thrd_success)
return EINVAL;
return 0;
}
int
glthread_recursive_lock_destroy (gl_recursive_lock_t *lock)
{
if (lock->init_needed)
call_once (&lock->init_once, lock->init_func);
mtx_destroy (&lock->mutex);
return 0;
}
/* -------------------------- gl_once_t datatype -------------------------- */
#endif
/* ========================================================================= */
#if USE_POSIX_THREADS
/* -------------------------- gl_lock_t datatype -------------------------- */
/* ------------------------- gl_rwlock_t datatype ------------------------- */
# if HAVE_PTHREAD_RWLOCK && (HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER || (defined PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP && (__GNU_LIBRARY__ > 1)))
# if defined PTHREAD_RWLOCK_INITIALIZER || defined PTHREAD_RWLOCK_INITIALIZER_NP
# if !HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER
/* glibc with bug https://sourceware.org/bugzilla/show_bug.cgi?id=13701 */
int
glthread_rwlock_init_for_glibc (pthread_rwlock_t *lock)
{
pthread_rwlockattr_t attributes;
int err;
err = pthread_rwlockattr_init (&attributes);
if (err != 0)
return err;
/* Note: PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP is the only value that
causes the writer to be preferred. PTHREAD_RWLOCK_PREFER_WRITER_NP does not
do this; see
http://man7.org/linux/man-pages/man3/pthread_rwlockattr_setkind_np.3.html */
err = pthread_rwlockattr_setkind_np (&attributes,
PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP);
if (err == 0)
err = pthread_rwlock_init(lock, &attributes);
/* pthread_rwlockattr_destroy always returns 0. It cannot influence the
return value. */
pthread_rwlockattr_destroy (&attributes);
return err;
}
# endif
# else
int
glthread_rwlock_init_multithreaded (gl_rwlock_t *lock)
{
int err;
err = pthread_rwlock_init (&lock->rwlock, NULL);
if (err != 0)
return err;
lock->initialized = 1;
return 0;
}
int
glthread_rwlock_rdlock_multithreaded (gl_rwlock_t *lock)
{
if (!lock->initialized)
{
int err;
err = pthread_mutex_lock (&lock->guard);
if (err != 0)
return err;
if (!lock->initialized)
{
err = glthread_rwlock_init_multithreaded (lock);
if (err != 0)
{
pthread_mutex_unlock (&lock->guard);
return err;
}
}
err = pthread_mutex_unlock (&lock->guard);
if (err != 0)
return err;
}
return pthread_rwlock_rdlock (&lock->rwlock);
}
int
glthread_rwlock_wrlock_multithreaded (gl_rwlock_t *lock)
{
if (!lock->initialized)
{
int err;
err = pthread_mutex_lock (&lock->guard);
if (err != 0)
return err;
if (!lock->initialized)
{
err = glthread_rwlock_init_multithreaded (lock);
if (err != 0)
{
pthread_mutex_unlock (&lock->guard);
return err;
}
}
err = pthread_mutex_unlock (&lock->guard);
if (err != 0)
return err;
}
return pthread_rwlock_wrlock (&lock->rwlock);
}
int
glthread_rwlock_unlock_multithreaded (gl_rwlock_t *lock)
{
if (!lock->initialized)
return EINVAL;
return pthread_rwlock_unlock (&lock->rwlock);
}
int
glthread_rwlock_destroy_multithreaded (gl_rwlock_t *lock)
{
int err;
if (!lock->initialized)
return EINVAL;
err = pthread_rwlock_destroy (&lock->rwlock);
if (err != 0)
return err;
lock->initialized = 0;
return 0;
}
# endif
# else
int
glthread_rwlock_init_multithreaded (gl_rwlock_t *lock)
{
int err;
err = pthread_mutex_init (&lock->lock, NULL);
if (err != 0)
return err;
err = pthread_cond_init (&lock->waiting_readers, NULL);
if (err != 0)
return err;
err = pthread_cond_init (&lock->waiting_writers, NULL);
if (err != 0)
return err;
lock->waiting_writers_count = 0;
lock->runcount = 0;
return 0;
}
int
glthread_rwlock_rdlock_multithreaded (gl_rwlock_t *lock)
{
int err;
err = pthread_mutex_lock (&lock->lock);
if (err != 0)
return err;
/* Test whether only readers are currently running, and whether the runcount
field will not overflow, and whether no writer is waiting. The latter
condition is because POSIX recommends that "write locks shall take
precedence over read locks", to avoid "writer starvation". */
while (!(lock->runcount + 1 > 0 && lock->waiting_writers_count == 0))
{
/* This thread has to wait for a while. Enqueue it among the
waiting_readers. */
err = pthread_cond_wait (&lock->waiting_readers, &lock->lock);
if (err != 0)
{
pthread_mutex_unlock (&lock->lock);
return err;
}
}
lock->runcount++;
return pthread_mutex_unlock (&lock->lock);
}
int
glthread_rwlock_wrlock_multithreaded (gl_rwlock_t *lock)
{
int err;
err = pthread_mutex_lock (&lock->lock);
if (err != 0)
return err;
/* Test whether no readers or writers are currently running. */
while (!(lock->runcount == 0))
{
/* This thread has to wait for a while. Enqueue it among the
waiting_writers. */
lock->waiting_writers_count++;
err = pthread_cond_wait (&lock->waiting_writers, &lock->lock);
if (err != 0)
{
lock->waiting_writers_count--;
pthread_mutex_unlock (&lock->lock);
return err;
}
lock->waiting_writers_count--;
}
lock->runcount--; /* runcount becomes -1 */
return pthread_mutex_unlock (&lock->lock);
}
int
glthread_rwlock_unlock_multithreaded (gl_rwlock_t *lock)
{
int err;
err = pthread_mutex_lock (&lock->lock);
if (err != 0)
return err;
if (lock->runcount < 0)
{
/* Drop a writer lock. */
if (!(lock->runcount == -1))
{
pthread_mutex_unlock (&lock->lock);
return EINVAL;
}
lock->runcount = 0;
}
else
{
/* Drop a reader lock. */
if (!(lock->runcount > 0))
{
pthread_mutex_unlock (&lock->lock);
return EINVAL;
}
lock->runcount--;
}
if (lock->runcount == 0)
{
/* POSIX recommends that "write locks shall take precedence over read
locks", to avoid "writer starvation". */
if (lock->waiting_writers_count > 0)
{
/* Wake up one of the waiting writers. */
err = pthread_cond_signal (&lock->waiting_writers);
if (err != 0)
{
pthread_mutex_unlock (&lock->lock);
return err;
}
}
else
{
/* Wake up all waiting readers. */
err = pthread_cond_broadcast (&lock->waiting_readers);
if (err != 0)
{
pthread_mutex_unlock (&lock->lock);
return err;
}
}
}
return pthread_mutex_unlock (&lock->lock);
}
int
glthread_rwlock_destroy_multithreaded (gl_rwlock_t *lock)
{
int err;
err = pthread_mutex_destroy (&lock->lock);
if (err != 0)
return err;
err = pthread_cond_destroy (&lock->waiting_readers);
if (err != 0)
return err;
err = pthread_cond_destroy (&lock->waiting_writers);
if (err != 0)
return err;
return 0;
}
# endif
/* --------------------- gl_recursive_lock_t datatype --------------------- */
# if HAVE_PTHREAD_MUTEX_RECURSIVE
# if defined PTHREAD_RECURSIVE_MUTEX_INITIALIZER || defined PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
int
glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock)
{
pthread_mutexattr_t attributes;
int err;
err = pthread_mutexattr_init (&attributes);
if (err != 0)
return err;
err = pthread_mutexattr_settype (&attributes, PTHREAD_MUTEX_RECURSIVE);
if (err != 0)
{
pthread_mutexattr_destroy (&attributes);
return err;
}
err = pthread_mutex_init (lock, &attributes);
if (err != 0)
{
pthread_mutexattr_destroy (&attributes);
return err;
}
err = pthread_mutexattr_destroy (&attributes);
if (err != 0)
return err;
return 0;
}
# else
int
glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock)
{
pthread_mutexattr_t attributes;
int err;
err = pthread_mutexattr_init (&attributes);
if (err != 0)
return err;
err = pthread_mutexattr_settype (&attributes, PTHREAD_MUTEX_RECURSIVE);
if (err != 0)
{
pthread_mutexattr_destroy (&attributes);
return err;
}
err = pthread_mutex_init (&lock->recmutex, &attributes);
if (err != 0)
{
pthread_mutexattr_destroy (&attributes);
return err;
}
err = pthread_mutexattr_destroy (&attributes);
if (err != 0)
return err;
lock->initialized = 1;
return 0;
}
int
glthread_recursive_lock_lock_multithreaded (gl_recursive_lock_t *lock)
{
if (!lock->initialized)
{
int err;
err = pthread_mutex_lock (&lock->guard);
if (err != 0)
return err;
if (!lock->initialized)
{
err = glthread_recursive_lock_init_multithreaded (lock);
if (err != 0)
{
pthread_mutex_unlock (&lock->guard);
return err;
}
}
err = pthread_mutex_unlock (&lock->guard);
if (err != 0)
return err;
}
return pthread_mutex_lock (&lock->recmutex);
}
int
glthread_recursive_lock_unlock_multithreaded (gl_recursive_lock_t *lock)
{
if (!lock->initialized)
return EINVAL;
return pthread_mutex_unlock (&lock->recmutex);
}
int
glthread_recursive_lock_destroy_multithreaded (gl_recursive_lock_t *lock)
{
int err;
if (!lock->initialized)
return EINVAL;
err = pthread_mutex_destroy (&lock->recmutex);
if (err != 0)
return err;
lock->initialized = 0;
return 0;
}
# endif
# else
int
glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock)
{
int err;
err = pthread_mutex_init (&lock->mutex, NULL);
if (err != 0)
return err;
lock->owner = (pthread_t) 0;
lock->depth = 0;
return 0;
}
int
glthread_recursive_lock_lock_multithreaded (gl_recursive_lock_t *lock)
{
pthread_t self = pthread_self ();
if (lock->owner != self)
{
int err;
err = pthread_mutex_lock (&lock->mutex);
if (err != 0)
return err;
lock->owner = self;
}
if (++(lock->depth) == 0) /* wraparound? */
{
lock->depth--;
return EAGAIN;
}
return 0;
}
int
glthread_recursive_lock_unlock_multithreaded (gl_recursive_lock_t *lock)
{
if (lock->owner != pthread_self ())
return EPERM;
if (lock->depth == 0)
return EINVAL;
if (--(lock->depth) == 0)
{
lock->owner = (pthread_t) 0;
return pthread_mutex_unlock (&lock->mutex);
}
else
return 0;
}
int
glthread_recursive_lock_destroy_multithreaded (gl_recursive_lock_t *lock)
{
if (lock->owner != (pthread_t) 0)
return EBUSY;
return pthread_mutex_destroy (&lock->mutex);
}
# endif
/* -------------------------- gl_once_t datatype -------------------------- */
static const pthread_once_t fresh_once = PTHREAD_ONCE_INIT;
int
glthread_once_singlethreaded (pthread_once_t *once_control)
{
/* We don't know whether pthread_once_t is an integer type, a floating-point
type, a pointer type, or a structure type. */
char *firstbyte = (char *)once_control;
if (*firstbyte == *(const char *)&fresh_once)
{
/* First time use of once_control. Invert the first byte. */
*firstbyte = ~ *(const char *)&fresh_once;
return 1;
}
else
return 0;
}
# if !(PTHREAD_IN_USE_DETECTION_HARD || USE_POSIX_THREADS_WEAK)
int
glthread_once_multithreaded (pthread_once_t *once_control,
void (*init_function) (void))
{
int err = pthread_once (once_control, init_function);
if (err == ENOSYS)
{
/* This happens on FreeBSD 11: The pthread_once function in libc returns
ENOSYS. */
if (glthread_once_singlethreaded (once_control))
init_function ();
return 0;
}
return err;
}
# endif
#endif
/* ========================================================================= */
#if USE_WINDOWS_THREADS
#endif
/* ========================================================================= */

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/* Locking in multithreaded situations.
Copyright (C) 2005-2020 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2005.
Based on GCC's gthr-posix.h, gthr-posix95.h, gthr-win32.h. */
/* This file contains locking primitives for use with a given thread library.
It does not contain primitives for creating threads or for other
synchronization primitives.
Normal (non-recursive) locks:
Type: gl_lock_t
Declaration: gl_lock_define(extern, name)
Initializer: gl_lock_define_initialized(, name)
Initialization: gl_lock_init (name);
Taking the lock: gl_lock_lock (name);
Releasing the lock: gl_lock_unlock (name);
De-initialization: gl_lock_destroy (name);
Equivalent functions with control of error handling:
Initialization: err = glthread_lock_init (&name);
Taking the lock: err = glthread_lock_lock (&name);
Releasing the lock: err = glthread_lock_unlock (&name);
De-initialization: err = glthread_lock_destroy (&name);
Read-Write (non-recursive) locks:
Type: gl_rwlock_t
Declaration: gl_rwlock_define(extern, name)
Initializer: gl_rwlock_define_initialized(, name)
Initialization: gl_rwlock_init (name);
Taking the lock: gl_rwlock_rdlock (name);
gl_rwlock_wrlock (name);
Releasing the lock: gl_rwlock_unlock (name);
De-initialization: gl_rwlock_destroy (name);
Equivalent functions with control of error handling:
Initialization: err = glthread_rwlock_init (&name);
Taking the lock: err = glthread_rwlock_rdlock (&name);
err = glthread_rwlock_wrlock (&name);
Releasing the lock: err = glthread_rwlock_unlock (&name);
De-initialization: err = glthread_rwlock_destroy (&name);
Recursive locks:
Type: gl_recursive_lock_t
Declaration: gl_recursive_lock_define(extern, name)
Initializer: gl_recursive_lock_define_initialized(, name)
Initialization: gl_recursive_lock_init (name);
Taking the lock: gl_recursive_lock_lock (name);
Releasing the lock: gl_recursive_lock_unlock (name);
De-initialization: gl_recursive_lock_destroy (name);
Equivalent functions with control of error handling:
Initialization: err = glthread_recursive_lock_init (&name);
Taking the lock: err = glthread_recursive_lock_lock (&name);
Releasing the lock: err = glthread_recursive_lock_unlock (&name);
De-initialization: err = glthread_recursive_lock_destroy (&name);
Once-only execution:
Type: gl_once_t
Initializer: gl_once_define(extern, name)
Execution: gl_once (name, initfunction);
Equivalent functions with control of error handling:
Execution: err = glthread_once (&name, initfunction);
*/
#ifndef _LOCK_H
#define _LOCK_H
#include <errno.h>
#include <stdlib.h>
#if !defined c11_threads_in_use
# if HAVE_THREADS_H && USE_POSIX_THREADS_WEAK
# include <threads.h>
# pragma weak thrd_exit
# define c11_threads_in_use() (thrd_exit != NULL)
# else
# define c11_threads_in_use() 0
# endif
#endif
/* ========================================================================= */
#if USE_ISOC_THREADS || USE_ISOC_AND_POSIX_THREADS
/* Use the ISO C threads library. */
# include <threads.h>
# ifdef __cplusplus
extern "C" {
# endif
/* -------------------------- gl_lock_t datatype -------------------------- */
typedef struct
{
int volatile init_needed;
once_flag init_once;
void (*init_func) (void);
mtx_t mutex;
}
gl_lock_t;
# define gl_lock_define(STORAGECLASS, NAME) \
STORAGECLASS gl_lock_t NAME;
# define gl_lock_define_initialized(STORAGECLASS, NAME) \
static void _atomic_init_##NAME (void); \
STORAGECLASS gl_lock_t NAME = \
{ 1, ONCE_FLAG_INIT, _atomic_init_##NAME }; \
static void _atomic_init_##NAME (void) \
{ \
if (glthread_lock_init (&(NAME))) \
abort (); \
}
extern int glthread_lock_init (gl_lock_t *lock);
extern int glthread_lock_lock (gl_lock_t *lock);
extern int glthread_lock_unlock (gl_lock_t *lock);
extern int glthread_lock_destroy (gl_lock_t *lock);
/* ------------------------- gl_rwlock_t datatype ------------------------- */
typedef struct
{
int volatile init_needed;
once_flag init_once;
void (*init_func) (void);
mtx_t lock; /* protects the remaining fields */
cnd_t waiting_readers; /* waiting readers */
cnd_t waiting_writers; /* waiting writers */
unsigned int waiting_writers_count; /* number of waiting writers */
int runcount; /* number of readers running, or -1 when a writer runs */
}
gl_rwlock_t;
# define gl_rwlock_define(STORAGECLASS, NAME) \
STORAGECLASS gl_rwlock_t NAME;
# define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
static void _atomic_init_##NAME (void); \
STORAGECLASS gl_rwlock_t NAME = \
{ 1, ONCE_FLAG_INIT, _atomic_init_##NAME }; \
static void _atomic_init_##NAME (void) \
{ \
if (glthread_rwlock_init (&(NAME))) \
abort (); \
}
extern int glthread_rwlock_init (gl_rwlock_t *lock);
extern int glthread_rwlock_rdlock (gl_rwlock_t *lock);
extern int glthread_rwlock_wrlock (gl_rwlock_t *lock);
extern int glthread_rwlock_unlock (gl_rwlock_t *lock);
extern int glthread_rwlock_destroy (gl_rwlock_t *lock);
/* --------------------- gl_recursive_lock_t datatype --------------------- */
typedef struct
{
int volatile init_needed;
once_flag init_once;
void (*init_func) (void);
mtx_t mutex;
}
gl_recursive_lock_t;
# define gl_recursive_lock_define(STORAGECLASS, NAME) \
STORAGECLASS gl_recursive_lock_t NAME;
# define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
static void _atomic_init_##NAME (void); \
STORAGECLASS gl_recursive_lock_t NAME = \
{ 1, ONCE_FLAG_INIT, _atomic_init_##NAME }; \
static void _atomic_init_##NAME (void) \
{ \
if (glthread_recursive_lock_init (&(NAME))) \
abort (); \
}
extern int glthread_recursive_lock_init (gl_recursive_lock_t *lock);
extern int glthread_recursive_lock_lock (gl_recursive_lock_t *lock);
extern int glthread_recursive_lock_unlock (gl_recursive_lock_t *lock);
extern int glthread_recursive_lock_destroy (gl_recursive_lock_t *lock);
/* -------------------------- gl_once_t datatype -------------------------- */
typedef once_flag gl_once_t;
# define gl_once_define(STORAGECLASS, NAME) \
STORAGECLASS once_flag NAME = ONCE_FLAG_INIT;
# define glthread_once(ONCE_CONTROL, INITFUNCTION) \
(call_once (ONCE_CONTROL, INITFUNCTION), 0)
# ifdef __cplusplus
}
# endif
#endif
/* ========================================================================= */
#if USE_POSIX_THREADS
/* Use the POSIX threads library. */
# include <pthread.h>
# ifdef __cplusplus
extern "C" {
# endif
# if PTHREAD_IN_USE_DETECTION_HARD
/* The pthread_in_use() detection needs to be done at runtime. */
# define pthread_in_use() \
glthread_in_use ()
extern int glthread_in_use (void);
# endif
# if USE_POSIX_THREADS_WEAK
/* Use weak references to the POSIX threads library. */
/* Weak references avoid dragging in external libraries if the other parts
of the program don't use them. Here we use them, because we don't want
every program that uses libintl to depend on libpthread. This assumes
that libpthread would not be loaded after libintl; i.e. if libintl is
loaded first, by an executable that does not depend on libpthread, and
then a module is dynamically loaded that depends on libpthread, libintl
will not be multithread-safe. */
/* The way to test at runtime whether libpthread is present is to test
whether a function pointer's value, such as &pthread_mutex_init, is
non-NULL. However, some versions of GCC have a bug through which, in
PIC mode, &foo != NULL always evaluates to true if there is a direct
call to foo(...) in the same function. To avoid this, we test the
address of a function in libpthread that we don't use. */
# pragma weak pthread_mutex_init
# pragma weak pthread_mutex_lock
# pragma weak pthread_mutex_unlock
# pragma weak pthread_mutex_destroy
# pragma weak pthread_rwlock_init
# pragma weak pthread_rwlock_rdlock
# pragma weak pthread_rwlock_wrlock
# pragma weak pthread_rwlock_unlock
# pragma weak pthread_rwlock_destroy
# pragma weak pthread_once
# pragma weak pthread_cond_init
# pragma weak pthread_cond_wait
# pragma weak pthread_cond_signal
# pragma weak pthread_cond_broadcast
# pragma weak pthread_cond_destroy
# pragma weak pthread_mutexattr_init
# pragma weak pthread_mutexattr_settype
# pragma weak pthread_mutexattr_destroy
# pragma weak pthread_rwlockattr_init
# if __GNU_LIBRARY__ > 1
# pragma weak pthread_rwlockattr_setkind_np
# endif
# pragma weak pthread_rwlockattr_destroy
# ifndef pthread_self
# pragma weak pthread_self
# endif
# if !PTHREAD_IN_USE_DETECTION_HARD
/* Considering all platforms with USE_POSIX_THREADS_WEAK, only few symbols
can be used to determine whether libpthread is in use. These are:
pthread_mutexattr_gettype
pthread_rwlockattr_destroy
pthread_rwlockattr_init
*/
# pragma weak pthread_mutexattr_gettype
# define pthread_in_use() \
(pthread_mutexattr_gettype != NULL || c11_threads_in_use ())
# endif
# else
# if !PTHREAD_IN_USE_DETECTION_HARD
# define pthread_in_use() 1
# endif
# endif
/* -------------------------- gl_lock_t datatype -------------------------- */
typedef pthread_mutex_t gl_lock_t;
# define gl_lock_define(STORAGECLASS, NAME) \
STORAGECLASS pthread_mutex_t NAME;
# define gl_lock_define_initialized(STORAGECLASS, NAME) \
STORAGECLASS pthread_mutex_t NAME = gl_lock_initializer;
# define gl_lock_initializer \
PTHREAD_MUTEX_INITIALIZER
# define glthread_lock_init(LOCK) \
(pthread_in_use () ? pthread_mutex_init (LOCK, NULL) : 0)
# define glthread_lock_lock(LOCK) \
(pthread_in_use () ? pthread_mutex_lock (LOCK) : 0)
# define glthread_lock_unlock(LOCK) \
(pthread_in_use () ? pthread_mutex_unlock (LOCK) : 0)
# define glthread_lock_destroy(LOCK) \
(pthread_in_use () ? pthread_mutex_destroy (LOCK) : 0)
/* ------------------------- gl_rwlock_t datatype ------------------------- */
# if HAVE_PTHREAD_RWLOCK && (HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER || (defined PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP && (__GNU_LIBRARY__ > 1)))
# if defined PTHREAD_RWLOCK_INITIALIZER || defined PTHREAD_RWLOCK_INITIALIZER_NP
typedef pthread_rwlock_t gl_rwlock_t;
# define gl_rwlock_define(STORAGECLASS, NAME) \
STORAGECLASS pthread_rwlock_t NAME;
# define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
STORAGECLASS pthread_rwlock_t NAME = gl_rwlock_initializer;
# if HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER
# if defined PTHREAD_RWLOCK_INITIALIZER
# define gl_rwlock_initializer \
PTHREAD_RWLOCK_INITIALIZER
# else
# define gl_rwlock_initializer \
PTHREAD_RWLOCK_INITIALIZER_NP
# endif
# define glthread_rwlock_init(LOCK) \
(pthread_in_use () ? pthread_rwlock_init (LOCK, NULL) : 0)
# else /* glibc with bug https://sourceware.org/bugzilla/show_bug.cgi?id=13701 */
# define gl_rwlock_initializer \
PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP
# define glthread_rwlock_init(LOCK) \
(pthread_in_use () ? glthread_rwlock_init_for_glibc (LOCK) : 0)
extern int glthread_rwlock_init_for_glibc (pthread_rwlock_t *lock);
# endif
# define glthread_rwlock_rdlock(LOCK) \
(pthread_in_use () ? pthread_rwlock_rdlock (LOCK) : 0)
# define glthread_rwlock_wrlock(LOCK) \
(pthread_in_use () ? pthread_rwlock_wrlock (LOCK) : 0)
# define glthread_rwlock_unlock(LOCK) \
(pthread_in_use () ? pthread_rwlock_unlock (LOCK) : 0)
# define glthread_rwlock_destroy(LOCK) \
(pthread_in_use () ? pthread_rwlock_destroy (LOCK) : 0)
# else
typedef struct
{
int initialized;
pthread_mutex_t guard; /* protects the initialization */
pthread_rwlock_t rwlock; /* read-write lock */
}
gl_rwlock_t;
# define gl_rwlock_define(STORAGECLASS, NAME) \
STORAGECLASS gl_rwlock_t NAME;
# define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
STORAGECLASS gl_rwlock_t NAME = gl_rwlock_initializer;
# define gl_rwlock_initializer \
{ 0, PTHREAD_MUTEX_INITIALIZER }
# define glthread_rwlock_init(LOCK) \
(pthread_in_use () ? glthread_rwlock_init_multithreaded (LOCK) : 0)
# define glthread_rwlock_rdlock(LOCK) \
(pthread_in_use () ? glthread_rwlock_rdlock_multithreaded (LOCK) : 0)
# define glthread_rwlock_wrlock(LOCK) \
(pthread_in_use () ? glthread_rwlock_wrlock_multithreaded (LOCK) : 0)
# define glthread_rwlock_unlock(LOCK) \
(pthread_in_use () ? glthread_rwlock_unlock_multithreaded (LOCK) : 0)
# define glthread_rwlock_destroy(LOCK) \
(pthread_in_use () ? glthread_rwlock_destroy_multithreaded (LOCK) : 0)
extern int glthread_rwlock_init_multithreaded (gl_rwlock_t *lock);
extern int glthread_rwlock_rdlock_multithreaded (gl_rwlock_t *lock);
extern int glthread_rwlock_wrlock_multithreaded (gl_rwlock_t *lock);
extern int glthread_rwlock_unlock_multithreaded (gl_rwlock_t *lock);
extern int glthread_rwlock_destroy_multithreaded (gl_rwlock_t *lock);
# endif
# else
typedef struct
{
pthread_mutex_t lock; /* protects the remaining fields */
pthread_cond_t waiting_readers; /* waiting readers */
pthread_cond_t waiting_writers; /* waiting writers */
unsigned int waiting_writers_count; /* number of waiting writers */
int runcount; /* number of readers running, or -1 when a writer runs */
}
gl_rwlock_t;
# define gl_rwlock_define(STORAGECLASS, NAME) \
STORAGECLASS gl_rwlock_t NAME;
# define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
STORAGECLASS gl_rwlock_t NAME = gl_rwlock_initializer;
# define gl_rwlock_initializer \
{ PTHREAD_MUTEX_INITIALIZER, PTHREAD_COND_INITIALIZER, PTHREAD_COND_INITIALIZER, 0, 0 }
# define glthread_rwlock_init(LOCK) \
(pthread_in_use () ? glthread_rwlock_init_multithreaded (LOCK) : 0)
# define glthread_rwlock_rdlock(LOCK) \
(pthread_in_use () ? glthread_rwlock_rdlock_multithreaded (LOCK) : 0)
# define glthread_rwlock_wrlock(LOCK) \
(pthread_in_use () ? glthread_rwlock_wrlock_multithreaded (LOCK) : 0)
# define glthread_rwlock_unlock(LOCK) \
(pthread_in_use () ? glthread_rwlock_unlock_multithreaded (LOCK) : 0)
# define glthread_rwlock_destroy(LOCK) \
(pthread_in_use () ? glthread_rwlock_destroy_multithreaded (LOCK) : 0)
extern int glthread_rwlock_init_multithreaded (gl_rwlock_t *lock);
extern int glthread_rwlock_rdlock_multithreaded (gl_rwlock_t *lock);
extern int glthread_rwlock_wrlock_multithreaded (gl_rwlock_t *lock);
extern int glthread_rwlock_unlock_multithreaded (gl_rwlock_t *lock);
extern int glthread_rwlock_destroy_multithreaded (gl_rwlock_t *lock);
# endif
/* --------------------- gl_recursive_lock_t datatype --------------------- */
# if HAVE_PTHREAD_MUTEX_RECURSIVE
# if defined PTHREAD_RECURSIVE_MUTEX_INITIALIZER || defined PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
typedef pthread_mutex_t gl_recursive_lock_t;
# define gl_recursive_lock_define(STORAGECLASS, NAME) \
STORAGECLASS pthread_mutex_t NAME;
# define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
STORAGECLASS pthread_mutex_t NAME = gl_recursive_lock_initializer;
# ifdef PTHREAD_RECURSIVE_MUTEX_INITIALIZER
# define gl_recursive_lock_initializer \
PTHREAD_RECURSIVE_MUTEX_INITIALIZER
# else
# define gl_recursive_lock_initializer \
PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
# endif
# define glthread_recursive_lock_init(LOCK) \
(pthread_in_use () ? glthread_recursive_lock_init_multithreaded (LOCK) : 0)
# define glthread_recursive_lock_lock(LOCK) \
(pthread_in_use () ? pthread_mutex_lock (LOCK) : 0)
# define glthread_recursive_lock_unlock(LOCK) \
(pthread_in_use () ? pthread_mutex_unlock (LOCK) : 0)
# define glthread_recursive_lock_destroy(LOCK) \
(pthread_in_use () ? pthread_mutex_destroy (LOCK) : 0)
extern int glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock);
# else
typedef struct
{
pthread_mutex_t recmutex; /* recursive mutex */
pthread_mutex_t guard; /* protects the initialization */
int initialized;
}
gl_recursive_lock_t;
# define gl_recursive_lock_define(STORAGECLASS, NAME) \
STORAGECLASS gl_recursive_lock_t NAME;
# define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
STORAGECLASS gl_recursive_lock_t NAME = gl_recursive_lock_initializer;
# define gl_recursive_lock_initializer \
{ PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, 0 }
# define glthread_recursive_lock_init(LOCK) \
(pthread_in_use () ? glthread_recursive_lock_init_multithreaded (LOCK) : 0)
# define glthread_recursive_lock_lock(LOCK) \
(pthread_in_use () ? glthread_recursive_lock_lock_multithreaded (LOCK) : 0)
# define glthread_recursive_lock_unlock(LOCK) \
(pthread_in_use () ? glthread_recursive_lock_unlock_multithreaded (LOCK) : 0)
# define glthread_recursive_lock_destroy(LOCK) \
(pthread_in_use () ? glthread_recursive_lock_destroy_multithreaded (LOCK) : 0)
extern int glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock);
extern int glthread_recursive_lock_lock_multithreaded (gl_recursive_lock_t *lock);
extern int glthread_recursive_lock_unlock_multithreaded (gl_recursive_lock_t *lock);
extern int glthread_recursive_lock_destroy_multithreaded (gl_recursive_lock_t *lock);
# endif
# else
/* Old versions of POSIX threads on Solaris did not have recursive locks.
We have to implement them ourselves. */
typedef struct
{
pthread_mutex_t mutex;
pthread_t owner;
unsigned long depth;
}
gl_recursive_lock_t;
# define gl_recursive_lock_define(STORAGECLASS, NAME) \
STORAGECLASS gl_recursive_lock_t NAME;
# define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
STORAGECLASS gl_recursive_lock_t NAME = gl_recursive_lock_initializer;
# define gl_recursive_lock_initializer \
{ PTHREAD_MUTEX_INITIALIZER, (pthread_t) 0, 0 }
# define glthread_recursive_lock_init(LOCK) \
(pthread_in_use () ? glthread_recursive_lock_init_multithreaded (LOCK) : 0)
# define glthread_recursive_lock_lock(LOCK) \
(pthread_in_use () ? glthread_recursive_lock_lock_multithreaded (LOCK) : 0)
# define glthread_recursive_lock_unlock(LOCK) \
(pthread_in_use () ? glthread_recursive_lock_unlock_multithreaded (LOCK) : 0)
# define glthread_recursive_lock_destroy(LOCK) \
(pthread_in_use () ? glthread_recursive_lock_destroy_multithreaded (LOCK) : 0)
extern int glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock);
extern int glthread_recursive_lock_lock_multithreaded (gl_recursive_lock_t *lock);
extern int glthread_recursive_lock_unlock_multithreaded (gl_recursive_lock_t *lock);
extern int glthread_recursive_lock_destroy_multithreaded (gl_recursive_lock_t *lock);
# endif
/* -------------------------- gl_once_t datatype -------------------------- */
typedef pthread_once_t gl_once_t;
# define gl_once_define(STORAGECLASS, NAME) \
STORAGECLASS pthread_once_t NAME = PTHREAD_ONCE_INIT;
# if PTHREAD_IN_USE_DETECTION_HARD || USE_POSIX_THREADS_WEAK
# define glthread_once(ONCE_CONTROL, INITFUNCTION) \
(pthread_in_use () \
? pthread_once (ONCE_CONTROL, INITFUNCTION) \
: (glthread_once_singlethreaded (ONCE_CONTROL) ? (INITFUNCTION (), 0) : 0))
# else
# define glthread_once(ONCE_CONTROL, INITFUNCTION) \
(pthread_in_use () \
? glthread_once_multithreaded (ONCE_CONTROL, INITFUNCTION) \
: (glthread_once_singlethreaded (ONCE_CONTROL) ? (INITFUNCTION (), 0) : 0))
extern int glthread_once_multithreaded (pthread_once_t *once_control,
void (*init_function) (void));
# endif
extern int glthread_once_singlethreaded (pthread_once_t *once_control);
# ifdef __cplusplus
}
# endif
#endif
/* ========================================================================= */
#if USE_WINDOWS_THREADS
# define WIN32_LEAN_AND_MEAN /* avoid including junk */
# include <windows.h>
# include "windows-mutex.h"
# include "windows-rwlock.h"
# include "windows-recmutex.h"
# include "windows-once.h"
# ifdef __cplusplus
extern "C" {
# endif
/* We can use CRITICAL_SECTION directly, rather than the native Windows Event,
Mutex, Semaphore types, because
- we need only to synchronize inside a single process (address space),
not inter-process locking,
- we don't need to support trylock operations. (TryEnterCriticalSection
does not work on Windows 95/98/ME. Packages that need trylock usually
define their own mutex type.) */
/* There is no way to statically initialize a CRITICAL_SECTION. It needs
to be done lazily, once only. For this we need spinlocks. */
/* -------------------------- gl_lock_t datatype -------------------------- */
typedef glwthread_mutex_t gl_lock_t;
# define gl_lock_define(STORAGECLASS, NAME) \
STORAGECLASS gl_lock_t NAME;
# define gl_lock_define_initialized(STORAGECLASS, NAME) \
STORAGECLASS gl_lock_t NAME = gl_lock_initializer;
# define gl_lock_initializer \
GLWTHREAD_MUTEX_INIT
# define glthread_lock_init(LOCK) \
(glwthread_mutex_init (LOCK), 0)
# define glthread_lock_lock(LOCK) \
glwthread_mutex_lock (LOCK)
# define glthread_lock_unlock(LOCK) \
glwthread_mutex_unlock (LOCK)
# define glthread_lock_destroy(LOCK) \
glwthread_mutex_destroy (LOCK)
/* ------------------------- gl_rwlock_t datatype ------------------------- */
typedef glwthread_rwlock_t gl_rwlock_t;
# define gl_rwlock_define(STORAGECLASS, NAME) \
STORAGECLASS gl_rwlock_t NAME;
# define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
STORAGECLASS gl_rwlock_t NAME = gl_rwlock_initializer;
# define gl_rwlock_initializer \
GLWTHREAD_RWLOCK_INIT
# define glthread_rwlock_init(LOCK) \
(glwthread_rwlock_init (LOCK), 0)
# define glthread_rwlock_rdlock(LOCK) \
glwthread_rwlock_rdlock (LOCK)
# define glthread_rwlock_wrlock(LOCK) \
glwthread_rwlock_wrlock (LOCK)
# define glthread_rwlock_unlock(LOCK) \
glwthread_rwlock_unlock (LOCK)
# define glthread_rwlock_destroy(LOCK) \
glwthread_rwlock_destroy (LOCK)
/* --------------------- gl_recursive_lock_t datatype --------------------- */
typedef glwthread_recmutex_t gl_recursive_lock_t;
# define gl_recursive_lock_define(STORAGECLASS, NAME) \
STORAGECLASS gl_recursive_lock_t NAME;
# define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
STORAGECLASS gl_recursive_lock_t NAME = gl_recursive_lock_initializer;
# define gl_recursive_lock_initializer \
GLWTHREAD_RECMUTEX_INIT
# define glthread_recursive_lock_init(LOCK) \
(glwthread_recmutex_init (LOCK), 0)
# define glthread_recursive_lock_lock(LOCK) \
glwthread_recmutex_lock (LOCK)
# define glthread_recursive_lock_unlock(LOCK) \
glwthread_recmutex_unlock (LOCK)
# define glthread_recursive_lock_destroy(LOCK) \
glwthread_recmutex_destroy (LOCK)
/* -------------------------- gl_once_t datatype -------------------------- */
typedef glwthread_once_t gl_once_t;
# define gl_once_define(STORAGECLASS, NAME) \
STORAGECLASS gl_once_t NAME = GLWTHREAD_ONCE_INIT;
# define glthread_once(ONCE_CONTROL, INITFUNCTION) \
(glwthread_once (ONCE_CONTROL, INITFUNCTION), 0)
# ifdef __cplusplus
}
# endif
#endif
/* ========================================================================= */
#if !(USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS)
/* Provide dummy implementation if threads are not supported. */
/* -------------------------- gl_lock_t datatype -------------------------- */
typedef int gl_lock_t;
# define gl_lock_define(STORAGECLASS, NAME)
# define gl_lock_define_initialized(STORAGECLASS, NAME)
# define glthread_lock_init(NAME) 0
# define glthread_lock_lock(NAME) 0
# define glthread_lock_unlock(NAME) 0
# define glthread_lock_destroy(NAME) 0
/* ------------------------- gl_rwlock_t datatype ------------------------- */
typedef int gl_rwlock_t;
# define gl_rwlock_define(STORAGECLASS, NAME)
# define gl_rwlock_define_initialized(STORAGECLASS, NAME)
# define glthread_rwlock_init(NAME) 0
# define glthread_rwlock_rdlock(NAME) 0
# define glthread_rwlock_wrlock(NAME) 0
# define glthread_rwlock_unlock(NAME) 0
# define glthread_rwlock_destroy(NAME) 0
/* --------------------- gl_recursive_lock_t datatype --------------------- */
typedef int gl_recursive_lock_t;
# define gl_recursive_lock_define(STORAGECLASS, NAME)
# define gl_recursive_lock_define_initialized(STORAGECLASS, NAME)
# define glthread_recursive_lock_init(NAME) 0
# define glthread_recursive_lock_lock(NAME) 0
# define glthread_recursive_lock_unlock(NAME) 0
# define glthread_recursive_lock_destroy(NAME) 0
/* -------------------------- gl_once_t datatype -------------------------- */
typedef int gl_once_t;
# define gl_once_define(STORAGECLASS, NAME) \
STORAGECLASS gl_once_t NAME = 0;
# define glthread_once(ONCE_CONTROL, INITFUNCTION) \
(*(ONCE_CONTROL) == 0 ? (*(ONCE_CONTROL) = ~ 0, INITFUNCTION (), 0) : 0)
#endif
/* ========================================================================= */
/* Macros with built-in error handling. */
/* -------------------------- gl_lock_t datatype -------------------------- */
#define gl_lock_init(NAME) \
do \
{ \
if (glthread_lock_init (&NAME)) \
abort (); \
} \
while (0)
#define gl_lock_lock(NAME) \
do \
{ \
if (glthread_lock_lock (&NAME)) \
abort (); \
} \
while (0)
#define gl_lock_unlock(NAME) \
do \
{ \
if (glthread_lock_unlock (&NAME)) \
abort (); \
} \
while (0)
#define gl_lock_destroy(NAME) \
do \
{ \
if (glthread_lock_destroy (&NAME)) \
abort (); \
} \
while (0)
/* ------------------------- gl_rwlock_t datatype ------------------------- */
#define gl_rwlock_init(NAME) \
do \
{ \
if (glthread_rwlock_init (&NAME)) \
abort (); \
} \
while (0)
#define gl_rwlock_rdlock(NAME) \
do \
{ \
if (glthread_rwlock_rdlock (&NAME)) \
abort (); \
} \
while (0)
#define gl_rwlock_wrlock(NAME) \
do \
{ \
if (glthread_rwlock_wrlock (&NAME)) \
abort (); \
} \
while (0)
#define gl_rwlock_unlock(NAME) \
do \
{ \
if (glthread_rwlock_unlock (&NAME)) \
abort (); \
} \
while (0)
#define gl_rwlock_destroy(NAME) \
do \
{ \
if (glthread_rwlock_destroy (&NAME)) \
abort (); \
} \
while (0)
/* --------------------- gl_recursive_lock_t datatype --------------------- */
#define gl_recursive_lock_init(NAME) \
do \
{ \
if (glthread_recursive_lock_init (&NAME)) \
abort (); \
} \
while (0)
#define gl_recursive_lock_lock(NAME) \
do \
{ \
if (glthread_recursive_lock_lock (&NAME)) \
abort (); \
} \
while (0)
#define gl_recursive_lock_unlock(NAME) \
do \
{ \
if (glthread_recursive_lock_unlock (&NAME)) \
abort (); \
} \
while (0)
#define gl_recursive_lock_destroy(NAME) \
do \
{ \
if (glthread_recursive_lock_destroy (&NAME)) \
abort (); \
} \
while (0)
/* -------------------------- gl_once_t datatype -------------------------- */
#define gl_once(NAME, INITFUNCTION) \
do \
{ \
if (glthread_once (&NAME, INITFUNCTION)) \
abort (); \
} \
while (0)
/* ========================================================================= */
#endif /* _LOCK_H */

73
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/* Multithreading primitives.
Copyright (C) 2005-2020 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2005. */
#include <config.h>
/* ========================================================================= */
#if USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS
/* Use the POSIX threads library. */
# include <pthread.h>
# include <stdlib.h>
# if PTHREAD_IN_USE_DETECTION_HARD
/* The function to be executed by a dummy thread. */
static void *
dummy_thread_func (void *arg)
{
return arg;
}
int
glthread_in_use (void)
{
static int tested;
static int result; /* 1: linked with -lpthread, 0: only with libc */
if (!tested)
{
pthread_t thread;
if (pthread_create (&thread, NULL, dummy_thread_func, NULL) != 0)
/* Thread creation failed. */
result = 0;
else
{
/* Thread creation works. */
void *retval;
if (pthread_join (thread, &retval) != 0)
abort ();
result = 1;
}
tested = 1;
}
return result;
}
# endif
#endif
/* ========================================================================= */
/* This declaration is solely to ensure that after preprocessing
this file is never empty. */
typedef int dummy;

41
lib/glthread/tls.c Normal file
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/* Thread-local storage in multithreaded situations.
Copyright (C) 2005-2020 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2005. */
#include <config.h>
#include "glthread/tls.h"
/* ========================================================================= */
#if USE_ISOC_THREADS || USE_ISOC_AND_POSIX_THREADS
#endif
/* ========================================================================= */
#if USE_POSIX_THREADS
#endif
/* ========================================================================= */
#if USE_WINDOWS_THREADS
#endif
/* ========================================================================= */

228
lib/glthread/tls.h Normal file
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/* Thread-local storage in multithreaded situations.
Copyright (C) 2005, 2007-2020 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2005. */
/* This file contains thread-local storage primitives for use with a given
thread library. It does not contain primitives for creating threads or
for other multithreading primitives.
Type: gl_tls_key_t
Initialization: gl_tls_key_init (name, destructor);
Getting per-thread value: gl_tls_get (name)
Setting per-thread value: gl_tls_set (name, pointer);
De-initialization: gl_tls_key_destroy (name);
Equivalent functions with control of error handling:
Initialization: err = glthread_tls_key_init (&name, destructor);
Setting per-thread value: err = glthread_tls_set (&name, pointer);
De-initialization: err = glthread_tls_key_destroy (&name);
A per-thread value is of type 'void *'.
A destructor is a function pointer of type 'void (*) (void *)', called
when a thread exits, and taking the last per-thread value as argument. It
is unspecified whether the destructor function is called when the last
per-thread value is NULL. On some platforms, the destructor function is
not called at all.
*/
#ifndef _TLS_H
#define _TLS_H
#include <errno.h>
#include <stdlib.h>
#if !defined c11_threads_in_use
# if HAVE_THREADS_H && USE_POSIX_THREADS_WEAK
# include <threads.h>
# pragma weak thrd_exit
# define c11_threads_in_use() (thrd_exit != NULL)
# else
# define c11_threads_in_use() 0
# endif
#endif
/* ========================================================================= */
#if USE_ISOC_THREADS || USE_ISOC_AND_POSIX_THREADS
/* Use the ISO C threads library. */
# include <threads.h>
/* ------------------------- gl_tls_key_t datatype ------------------------- */
typedef tss_t gl_tls_key_t;
# define glthread_tls_key_init(KEY, DESTRUCTOR) \
(tss_create (KEY, DESTRUCTOR) != thrd_success ? EAGAIN : 0)
# define gl_tls_get(NAME) \
tss_get (NAME)
# define glthread_tls_set(KEY, POINTER) \
(tss_set (*(KEY), (POINTER)) != thrd_success ? ENOMEM : 0)
# define glthread_tls_key_destroy(KEY) \
(tss_delete (*(KEY)), 0)
#endif
/* ========================================================================= */
#if USE_POSIX_THREADS
/* Use the POSIX threads library. */
# include <pthread.h>
# if PTHREAD_IN_USE_DETECTION_HARD
/* The pthread_in_use() detection needs to be done at runtime. */
# define pthread_in_use() \
glthread_in_use ()
extern int glthread_in_use (void);
# endif
# if USE_POSIX_THREADS_WEAK
/* Use weak references to the POSIX threads library. */
# pragma weak pthread_key_create
# pragma weak pthread_getspecific
# pragma weak pthread_setspecific
# pragma weak pthread_key_delete
# ifndef pthread_self
# pragma weak pthread_self
# endif
# if !PTHREAD_IN_USE_DETECTION_HARD
# pragma weak pthread_mutexattr_gettype
# define pthread_in_use() \
(pthread_mutexattr_gettype != NULL || c11_threads_in_use ())
# endif
# else
# if !PTHREAD_IN_USE_DETECTION_HARD
# define pthread_in_use() 1
# endif
# endif
/* ------------------------- gl_tls_key_t datatype ------------------------- */
typedef union
{
void *singlethread_value;
pthread_key_t key;
}
gl_tls_key_t;
# define glthread_tls_key_init(KEY, DESTRUCTOR) \
(pthread_in_use () \
? pthread_key_create (&(KEY)->key, DESTRUCTOR) \
: ((KEY)->singlethread_value = NULL, 0))
# define gl_tls_get(NAME) \
(pthread_in_use () \
? pthread_getspecific ((NAME).key) \
: (NAME).singlethread_value)
# define glthread_tls_set(KEY, POINTER) \
(pthread_in_use () \
? pthread_setspecific ((KEY)->key, (POINTER)) \
: ((KEY)->singlethread_value = (POINTER), 0))
# define glthread_tls_key_destroy(KEY) \
(pthread_in_use () ? pthread_key_delete ((KEY)->key) : 0)
#endif
/* ========================================================================= */
#if USE_WINDOWS_THREADS
# define WIN32_LEAN_AND_MEAN /* avoid including junk */
# include <windows.h>
# include "windows-tls.h"
/* ------------------------- gl_tls_key_t datatype ------------------------- */
typedef glwthread_tls_key_t gl_tls_key_t;
# define glthread_tls_key_init(KEY, DESTRUCTOR) \
glwthread_tls_key_create (KEY, DESTRUCTOR)
# define gl_tls_get(NAME) \
TlsGetValue (NAME)
# define glthread_tls_set(KEY, POINTER) \
(!TlsSetValue (*(KEY), POINTER) ? EINVAL : 0)
# define glthread_tls_key_destroy(KEY) \
glwthread_tls_key_delete (*(KEY))
#endif
/* ========================================================================= */
#if !(USE_ISOC_THREADS || USE_POSIX_THREADS || USE_ISOC_AND_POSIX_THREADS || USE_WINDOWS_THREADS)
/* Provide dummy implementation if threads are not supported. */
/* ------------------------- gl_tls_key_t datatype ------------------------- */
typedef struct
{
void *singlethread_value;
}
gl_tls_key_t;
# define glthread_tls_key_init(KEY, DESTRUCTOR) \
((KEY)->singlethread_value = NULL, \
(void) (DESTRUCTOR), \
0)
# define gl_tls_get(NAME) \
(NAME).singlethread_value
# define glthread_tls_set(KEY, POINTER) \
((KEY)->singlethread_value = (POINTER), 0)
# define glthread_tls_key_destroy(KEY) \
0
#endif
/* ========================================================================= */
/* Macros with built-in error handling. */
/* ------------------------- gl_tls_key_t datatype ------------------------- */
#define gl_tls_key_init(NAME, DESTRUCTOR) \
do \
{ \
if (glthread_tls_key_init (&NAME, DESTRUCTOR)) \
abort (); \
} \
while (0)
#define gl_tls_set(NAME, POINTER) \
do \
{ \
if (glthread_tls_set (&NAME, POINTER)) \
abort (); \
} \
while (0)
#define gl_tls_key_destroy(NAME) \
do \
{ \
if (glthread_tls_key_destroy (&NAME)) \
abort (); \
} \
while (0)
/* ========================================================================= */
#endif /* _TLS_H */