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| author | Ulrich Drepper <drepper@redhat.com> | 1998-10-29 15:17:25 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 1998-10-29 15:17:25 +0000 |
| commit | c5e340c71ba6f4563ca5fa245baa82b6363ddb2e (patch) | |
| tree | 3ff655dfee624df411e1f3ebc062181fc0f3f338 /linuxthreads/spinlock.c | |
| parent | 05e951cd1ae7917ce25ec96cc17ebcbf401e345c (diff) | |
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Update.
1998-10-29 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/unix/sysv/linux/ttyname_r.c (ttyname_r): Try reading
/prof/self/fd/FD first.
* sysdeps/unix/sysv/linux/ttyname.c (ttyname): Likewise.
* stdio-common/_itoa.h (_fitoa_word): New inline function. Write
formatted number starting at given position and return pointer to
following byte.
(_fitoa): Likewise, for long long.
Diffstat (limited to 'linuxthreads/spinlock.c')
| -rw-r--r-- | linuxthreads/spinlock.c | 20 |
1 files changed, 5 insertions, 15 deletions
diff --git a/linuxthreads/spinlock.c b/linuxthreads/spinlock.c index 172cb7afe4..00a8691e5b 100644 --- a/linuxthreads/spinlock.c +++ b/linuxthreads/spinlock.c @@ -36,17 +36,18 @@ This is safe because there are no concurrent __pthread_unlock operations -- only the thread that locked the mutex can unlock it. */ -void __pthread_lock(struct _pthread_fastlock * lock) +void internal_function __pthread_lock(struct _pthread_fastlock * lock, + pthread_descr self) { long oldstatus, newstatus; - pthread_descr self = NULL; do { oldstatus = lock->__status; if (oldstatus == 0) { newstatus = 1; } else { - self = thread_self(); + if (self == NULL) + self = thread_self(); newstatus = (long) self; } if (self != NULL) @@ -56,18 +57,7 @@ void __pthread_lock(struct _pthread_fastlock * lock) if (oldstatus != 0) suspend(self); } -int __pthread_trylock(struct _pthread_fastlock * lock) -{ - long oldstatus; - - do { - oldstatus = lock->__status; - if (oldstatus != 0) return EBUSY; - } while(! compare_and_swap(&lock->__status, 0, 1, &lock->__spinlock)); - return 0; -} - -void __pthread_unlock(struct _pthread_fastlock * lock) +void internal_function __pthread_unlock(struct _pthread_fastlock * lock) { long oldstatus; pthread_descr thr, * ptr, * maxptr; |