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unify and overhaul timed futex waits

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new features:

- FUTEX_WAIT_BITSET op will be used for timed waits if available. this
  saves a call to clock_gettime.

- error checking for the timespec struct is now inside __timedwait so
  it doesn't need to be duplicated everywhere. cond_timedwait still
  needs to duplicate it to avoid unlocking the mutex, though.

- pushing and popping the cancellation handler is delegated to
  __timedwait, and cancellable/non-cancellable waits are unified.
This commit is contained in:
Rich Felker
2011-08-02 21:11:36 -04:00
parent c68de0be2f
commit ec381af902
10 changed files with 56 additions and 53 deletions
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6
src/thread/pthread_join.c
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@ -1,9 +1,13 @@
#include "pthread_impl.h"
static void dummy(void *p)
{
}
int pthread_join(pthread_t t, void **res)
{
int tmp = t->tid;
if (tmp) __timedwait_cp(&t->tid, tmp, 0, 0, 1);
if (tmp) __timedwait(&t->tid, tmp, 0, 0, dummy, 0, 1);
if (res) *res = t->result;
if (t->map_base) munmap(t->map_base, t->map_size);
return 0;