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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/sysdeps/powerpc | |
| parent | e7c036b39ef12abc7ff131982df75e3ec35c0f31 (diff) | |
| download | glibc-de26253715b91e7fd4a9854fe836baef86dbc7af.tar.gz | |
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/sysdeps/powerpc')
| -rw-r--r-- | linuxthreads/sysdeps/powerpc/pt-machine.h | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/linuxthreads/sysdeps/powerpc/pt-machine.h b/linuxthreads/sysdeps/powerpc/pt-machine.h index 578369a7fe..c7d0670d82 100644 --- a/linuxthreads/sysdeps/powerpc/pt-machine.h +++ b/linuxthreads/sysdeps/powerpc/pt-machine.h @@ -27,12 +27,7 @@ /* For multiprocessor systems, we want to ensure all memory accesses are completed before we reset a lock. */ -#if 0 -/* on non multiprocessor systems, you can just: */ -#define sync() /* nothing */ -#else -#define sync() __asm__ __volatile__ ("sync") -#endif +#define MEMORY_BARRIER() __asm__ __volatile__ ("sync" : : : "memory") /* Get some notion of the current stack. Need not be exactly the top of the stack, just something somewhere in the current frame. */ @@ -64,6 +59,6 @@ __compare_and_swap (long int *p, long int oldval, long int newval) : "=&r"(ret) : "r"(p), "r"(newval), "r"(oldval) : "cr0", "memory"); - sync(); + MEMORY_BARRIER(); return ret == 0; } |