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Differential D21088 Diff 60270 lib/libthr/thread/thr_rwlock.c

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lib/libthr/thread/thr_rwlock.c

Show All 35 Lines
#include "namespace.h" #include "namespace.h"
#include <pthread.h> #include <pthread.h>
#include "un-namespace.h" #include "un-namespace.h"
#include "thr_private.h" #include "thr_private.h"
_Static_assert(sizeof(struct pthread_rwlock) <= PAGE_SIZE, _Static_assert(sizeof(struct pthread_rwlock) <= PAGE_SIZE,
"pthread_rwlock is too large for off-page"); "pthread_rwlock is too large for off-page");
__weak_reference(_pthread_rwlock_destroy, pthread_rwlock_destroy); __weak_reference(_thr_rwlock_destroy, pthread_rwlock_destroy);
__weak_reference(_pthread_rwlock_init, pthread_rwlock_init); __weak_reference(_thr_rwlock_destroy, _pthread_rwlock_destroy);
__weak_reference(_pthread_rwlock_rdlock, pthread_rwlock_rdlock); __weak_reference(_thr_rwlock_init, pthread_rwlock_init);
__weak_reference(_thr_rwlock_init, _pthread_rwlock_init);
__weak_reference(_Tthr_rwlock_rdlock, pthread_rwlock_rdlock);
__weak_reference(_Tthr_rwlock_rdlock, _pthread_rwlock_rdlock);
__weak_reference(_pthread_rwlock_timedrdlock, pthread_rwlock_timedrdlock); __weak_reference(_pthread_rwlock_timedrdlock, pthread_rwlock_timedrdlock);
__weak_reference(_pthread_rwlock_tryrdlock, pthread_rwlock_tryrdlock); __weak_reference(_Tthr_rwlock_tryrdlock, pthread_rwlock_tryrdlock);
__weak_reference(_pthread_rwlock_trywrlock, pthread_rwlock_trywrlock); __weak_reference(_Tthr_rwlock_tryrdlock, _pthread_rwlock_tryrdlock);
__weak_reference(_pthread_rwlock_unlock, pthread_rwlock_unlock); __weak_reference(_Tthr_rwlock_trywrlock, pthread_rwlock_trywrlock);
__weak_reference(_pthread_rwlock_wrlock, pthread_rwlock_wrlock); __weak_reference(_Tthr_rwlock_trywrlock, _pthread_rwlock_trywrlock);
__weak_reference(_Tthr_rwlock_unlock, pthread_rwlock_unlock);
__weak_reference(_Tthr_rwlock_unlock, _pthread_rwlock_unlock);
__weak_reference(_Tthr_rwlock_wrlock, pthread_rwlock_wrlock);
__weak_reference(_Tthr_rwlock_wrlock, _pthread_rwlock_wrlock);
__weak_reference(_pthread_rwlock_timedwrlock, pthread_rwlock_timedwrlock); __weak_reference(_pthread_rwlock_timedwrlock, pthread_rwlock_timedwrlock);
static int init_static(struct pthread *thread, pthread_rwlock_t *rwlock); static int init_static(struct pthread *thread, pthread_rwlock_t *rwlock);
static int init_rwlock(pthread_rwlock_t *rwlock, pthread_rwlock_t *rwlock_out); static int init_rwlock(pthread_rwlock_t *rwlock, pthread_rwlock_t *rwlock_out);
static int __always_inline static int __always_inline
check_and_init_rwlock(pthread_rwlock_t *rwlock, pthread_rwlock_t *rwlock_out) check_and_init_rwlock(pthread_rwlock_t *rwlock, pthread_rwlock_t *rwlock_out)
{ {
▲ Show 20 Lines • Show All 45 Lines • ▼ Show 20 Lines if (prwlock == NULL)
return (EFAULT); return (EFAULT);
prwlock->lock.rw_flags |= USYNC_PROCESS_SHARED; prwlock->lock.rw_flags |= USYNC_PROCESS_SHARED;
*rwlock = THR_PSHARED_PTR; *rwlock = THR_PSHARED_PTR;
} }
return (0); return (0);
} }
int int
_pthread_rwlock_destroy (pthread_rwlock_t *rwlock) _thr_rwlock_destroy(pthread_rwlock_t *rwlock)
{ {
pthread_rwlock_t prwlock; pthread_rwlock_t prwlock;
int ret; int ret;
prwlock = *rwlock; prwlock = *rwlock;
if (prwlock == THR_RWLOCK_INITIALIZER) if (prwlock == THR_RWLOCK_INITIALIZER)
ret = 0; ret = 0;
else if (prwlock == THR_RWLOCK_DESTROYED) else if (prwlock == THR_RWLOCK_DESTROYED)
Show All 23 Lines else
ret = 0; ret = 0;
THR_LOCK_RELEASE(thread, &_rwlock_static_lock); THR_LOCK_RELEASE(thread, &_rwlock_static_lock);
return (ret); return (ret);
} }
int int
_pthread_rwlock_init(pthread_rwlock_t *rwlock, const pthread_rwlockattr_t *attr) _thr_rwlock_init(pthread_rwlock_t *rwlock, const pthread_rwlockattr_t *attr)
{ {
*rwlock = NULL; *rwlock = NULL;
return (rwlock_init(rwlock, attr)); return (rwlock_init(rwlock, attr));
} }
static int static int
rwlock_rdlock_common(pthread_rwlock_t *rwlock, const struct timespec *abstime) rwlock_rdlock_common(pthread_rwlock_t *rwlock, const struct timespec *abstime)
▲ Show 20 Lines • Show All 52 Lines • ▼ Show 20 Lines for (;;) {
} }
} }
if (ret == 0) if (ret == 0)
curthread->rdlock_count++; curthread->rdlock_count++;
return (ret); return (ret);
} }
int int
_pthread_rwlock_rdlock (pthread_rwlock_t *rwlock) _Tthr_rwlock_rdlock(pthread_rwlock_t *rwlock)
{ {
return (rwlock_rdlock_common(rwlock, NULL)); return (rwlock_rdlock_common(rwlock, NULL));
} }
int int
_pthread_rwlock_timedrdlock(pthread_rwlock_t * __restrict rwlock, _pthread_rwlock_timedrdlock(pthread_rwlock_t * __restrict rwlock,
const struct timespec * __restrict abstime) const struct timespec * __restrict abstime)
{ {
return (rwlock_rdlock_common(rwlock, abstime)); return (rwlock_rdlock_common(rwlock, abstime));
} }
int int
_pthread_rwlock_tryrdlock (pthread_rwlock_t *rwlock) _Tthr_rwlock_tryrdlock(pthread_rwlock_t *rwlock)
{ {
struct pthread *curthread = _get_curthread(); struct pthread *curthread = _get_curthread();
pthread_rwlock_t prwlock; pthread_rwlock_t prwlock;
int flags; int flags;
int ret; int ret;
ret = check_and_init_rwlock(rwlock, &prwlock); ret = check_and_init_rwlock(rwlock, &prwlock);
if (ret != 0) if (ret != 0)
Show All 19 Lines_Tthr_rwlock_tryrdlock(pthread_rwlock_t *rwlock)
ret = _thr_rwlock_tryrdlock(&prwlock->lock, flags); ret = _thr_rwlock_tryrdlock(&prwlock->lock, flags);
if (ret == 0) if (ret == 0)
curthread->rdlock_count++; curthread->rdlock_count++;
return (ret); return (ret);
} }
int int
_pthread_rwlock_trywrlock (pthread_rwlock_t *rwlock) _Tthr_rwlock_trywrlock(pthread_rwlock_t *rwlock)
{ {
struct pthread *curthread = _get_curthread(); struct pthread *curthread = _get_curthread();
pthread_rwlock_t prwlock; pthread_rwlock_t prwlock;
int ret; int ret;
ret = check_and_init_rwlock(rwlock, &prwlock); ret = check_and_init_rwlock(rwlock, &prwlock);
if (ret != 0) if (ret != 0)
return (ret); return (ret);
ret = _thr_rwlock_trywrlock(&prwlock->lock); ret = _thr_rwlock_trywrlock(&prwlock->lock);
if (ret == 0) if (ret == 0)
prwlock->owner = TID(curthread); prwlock->owner = TID(curthread);
return (ret); return (ret);
} }
static int static int
rwlock_wrlock_common (pthread_rwlock_t *rwlock, const struct timespec *abstime) rwlock_wrlock_common(pthread_rwlock_t *rwlock, const struct timespec *abstime)
{ {
struct pthread *curthread = _get_curthread(); struct pthread *curthread = _get_curthread();
pthread_rwlock_t prwlock; pthread_rwlock_t prwlock;
int ret; int ret;
ret = check_and_init_rwlock(rwlock, &prwlock); ret = check_and_init_rwlock(rwlock, &prwlock);
if (ret != 0) if (ret != 0)
return (ret); return (ret);
Show All 29 Lines if (_thr_rwlock_trywrlock(&prwlock->lock) == 0) {
prwlock->owner = TID(curthread); prwlock->owner = TID(curthread);
break; break;
} }
} }
return (ret); return (ret);
} }
int int
_pthread_rwlock_wrlock (pthread_rwlock_t *rwlock) _Tthr_rwlock_wrlock(pthread_rwlock_t *rwlock)
{ {
return (rwlock_wrlock_common (rwlock, NULL)); return (rwlock_wrlock_common (rwlock, NULL));
} }
int int
_pthread_rwlock_timedwrlock(pthread_rwlock_t * __restrict rwlock, _pthread_rwlock_timedwrlock(pthread_rwlock_t * __restrict rwlock,
const struct timespec * __restrict abstime) const struct timespec * __restrict abstime)
{ {
return (rwlock_wrlock_common (rwlock, abstime)); return (rwlock_wrlock_common (rwlock, abstime));
} }
int int
_pthread_rwlock_unlock(pthread_rwlock_t *rwlock) _Tthr_rwlock_unlock(pthread_rwlock_t *rwlock)
{ {
struct pthread *curthread = _get_curthread(); struct pthread *curthread = _get_curthread();
pthread_rwlock_t prwlock; pthread_rwlock_t prwlock;
int ret; int ret;
int32_t state; int32_t state;
if (*rwlock == THR_PSHARED_PTR) { if (*rwlock == THR_PSHARED_PTR) {
prwlock = __thr_pshared_offpage(rwlock, 0); prwlock = __thr_pshared_offpage(rwlock, 0);
Show All 22 Lines