lib/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2025-12-24 17:51:17 +03:00
Code Activity

Update.

Browse Source 
2000-07-04  Ulrich Drepper  <drepper@redhat.com>

	* spinlock.c (__pthread_unlock): Properly place write barrier.
	Patch by Kaz Kylheku <kaz@ashi.footprints.net>.
This commit is contained in:
Ulrich Drepper
2000-07-04 08:22:44 +00:00
parent 0d6af3a86d
commit 83b1b6d8fa
10 changed files with 684 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
linuxthreads/spinlock.c
View File

@@ -34,7 +34,7 @@
(status & 1) == 1: spinlock is taken and (status & ~1L) is a
pointer to the first waiting thread; other
waiting threads are linked via the p_nextlock
waiting threads are linked via the p_nextlock
field.
(status & 1) == 0: same as above, but spinlock is not taken.
@@ -149,8 +149,8 @@ int __pthread_unlock(struct _pthread_fastlock * lock)
#endif
#if !defined HAS_COMPARE_AND_SWAP
{
lock->__spinlock = 0;
WRITE_MEMORY_BARRIER();
lock->__spinlock = 0;
return 0;
}
#endif
@@ -160,7 +160,7 @@ again:
oldstatus = lock->__status;
while ((oldstatus = lock->__status) == 1) {
if (__compare_and_swap_with_release_semantics(&lock->__status,
if (__compare_and_swap_with_release_semantics(&lock->__status,
oldstatus, 0))
return 0;
}