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| author | Ulrich Drepper <drepper@redhat.com> | 2000-07-19 18:58:05 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2000-07-19 18:58:05 +0000 |
| commit | 80ec4993cc416058f6f8e98ce32bd729e9be1150 (patch) | |
| tree | 1319ef9e116827875e9ccf2aefa10974303c8bd1 /linuxthreads/spinlock.c | |
| parent | 5fca066768291ffbdaffa9d055c3e9055c5998ad (diff) | |
| download | glibc-80ec4993cc416058f6f8e98ce32bd729e9be1150.zip glibc-80ec4993cc416058f6f8e98ce32bd729e9be1150.tar.gz glibc-80ec4993cc416058f6f8e98ce32bd729e9be1150.tar.bz2 | |
Update.
2000-07-19 Kaz Kylheku <kaz@ashi.footprints.net>
Bugfixes to the variant of the code for machines with no compare
and swap.
* spinlock.c (__pthread_alt_lock, __pthread_alt_timedlock): Wait
node was not being properly enqueued, due to failing to update
the lock->__status field.
* spinlock.c (__pthread_alt_timedlock): The oldstatus variable was
being set inappropriately, causing the suspend function to be called
with a null self pointer and crash.
Diffstat (limited to 'linuxthreads/spinlock.c')
| -rw-r--r-- | linuxthreads/spinlock.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/linuxthreads/spinlock.c b/linuxthreads/spinlock.c index 6cd2679..102b1be 100644 --- a/linuxthreads/spinlock.c +++ b/linuxthreads/spinlock.c @@ -389,6 +389,7 @@ void __pthread_alt_lock(struct _pthread_fastlock * lock, wait_node.abandoned = 0; wait_node.next = (struct wait_node *) lock->__status; wait_node.thr = self; + lock->__status = (long) &wait_node; suspend_needed = 1; } @@ -434,7 +435,7 @@ void __pthread_alt_lock(struct _pthread_fastlock * lock, int __pthread_alt_timedlock(struct _pthread_fastlock * lock, pthread_descr self, const struct timespec *abstime) { - long oldstatus; + long oldstatus = 0; #if defined HAS_COMPARE_AND_SWAP long newstatus; #endif @@ -462,11 +463,12 @@ int __pthread_alt_timedlock(struct _pthread_fastlock * lock, p_wait_node->abandoned = 0; p_wait_node->next = (struct wait_node *) lock->__status; p_wait_node->thr = self; + lock->__status = (long) p_wait_node; + oldstatus = 1; /* force suspend */ } WRITE_MEMORY_BARRIER(); lock->__spinlock = 0; - oldstatus = 1; /* force suspend */ goto suspend; } #endif |