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musl/src/thread/pthread_rwlock_timedrdlock.c

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initial check-in, version 0.5.0
15 years ago
#include "pthread_impl.h"
int pthread_rwlock_timedrdlock(pthread_rwlock_t *rw, const struct timespec *at)
{
int w=0;
while (pthread_rwlock_tryrdlock(rw)) {
reorganize pthread data structures and move the definitions to alltypes.h this allows sys/types.h to provide the pthread types, as required by POSIX. this design also facilitates forcing ABI-compatible sizes in the arch-specific alltypes.h, while eliminating the need for developers changing the internals of the pthread types to poke around with arch-specific headers they may not be able to test.
15 years ago
if (!w) a_inc(&rw->_rw_waiters), w++;
unify and overhaul timed futex waits 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.
15 years ago
if (__timedwait(&rw->_rw_wrlock, 1, CLOCK_REALTIME, at, 0, 0, 0)==ETIMEDOUT) {
reorganize pthread data structures and move the definitions to alltypes.h this allows sys/types.h to provide the pthread types, as required by POSIX. this design also facilitates forcing ABI-compatible sizes in the arch-specific alltypes.h, while eliminating the need for developers changing the internals of the pthread types to poke around with arch-specific headers they may not be able to test.
15 years ago
if (w) a_dec(&rw->_rw_waiters);
initial check-in, version 0.5.0
15 years ago
return ETIMEDOUT;
}
}
reorganize pthread data structures and move the definitions to alltypes.h this allows sys/types.h to provide the pthread types, as required by POSIX. this design also facilitates forcing ABI-compatible sizes in the arch-specific alltypes.h, while eliminating the need for developers changing the internals of the pthread types to poke around with arch-specific headers they may not be able to test.
15 years ago
if (w) a_dec(&rw->_rw_waiters);
initial check-in, version 0.5.0
15 years ago
return 0;
}