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| author | Ulrich Drepper <drepper@redhat.com> | 2000-04-11 17:03:03 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2000-04-11 17:03:03 +0000 |
| commit | de26253715b91e7fd4a9854fe836baef86dbc7af (patch) | |
| tree | fad01a7fbfc9ebc7121551e0d8877c3fed149011 /linuxthreads/internals.h | |
| parent | e7c036b39ef12abc7ff131982df75e3ec35c0f31 (diff) | |
| download | glibc-de26253715b91e7fd4a9854fe836baef86dbc7af.tar.gz glibc-de26253715b91e7fd4a9854fe836baef86dbc7af.tar.xz glibc-de26253715b91e7fd4a9854fe836baef86dbc7af.zip | |
Upadte.
2000-04-11 Ulrich Drepper <drepper@redhat.com> * internals.h: Define MEMORY_BARRIER as empty if not defined already. * spinlock.c (__pthread_lock): Add memory barriers. (__pthread_unlock): Likewise. * sysdeps/alpha/pt-machine.h (MEMORY_BARRIER): Define using mb instruction. (RELEASE): Not needed anymore. (__compare_and_swap): Mark asm as modifying memory. * sysdeps/powerpc/pt-machine.h (sync): Remove. Replace with definition of MEMORY_BARRIER. (__compare_and_swap): Use MEMORY_BARRIER instead of sync. * sysdeps/sparc/sparc32/pt-machine.h (RELEASE): Not needed anymore. (MEMORY_BARRIER): Define using stbar. * sysdeps/sparc/sparc64/pt-machine.h (MEMORY_BARRIER): Define using stbar. (__compare_and_swap): Use MEMORY_BARRIER to ensure ordering. Patch by Xavier Leroy <Xavier.Leroy@inria.fr> based on comments by Mike Burrows <m3b@pa.dec.com>.
Diffstat (limited to 'linuxthreads/internals.h')
| -rw-r--r-- | linuxthreads/internals.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/linuxthreads/internals.h b/linuxthreads/internals.h index 8cb9b6837c..3984512e4d 100644 --- a/linuxthreads/internals.h +++ b/linuxthreads/internals.h @@ -357,6 +357,13 @@ static inline pthread_descr thread_self (void) #endif } +/* If MEMORY_BARRIER isn't defined in pt-machine.h, assume the architecture + doesn't need a memory barrier instruction (e.g. Intel x86) */ + +#ifndef MEMORY_BARRIER +#define MEMORY_BARRIER() +#endif + /* Max number of times we must spin on a spinlock calling sched_yield(). After MAX_SPIN_COUNT iterations, we put the calling thread to sleep. */ |