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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) | |
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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. */ |