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add mutex to windows emulated recursive Read locks

This commit is contained in:
Anthony Minessale 2016-12-13 14:04:15 -06:00 committed by Mike Jerris
parent fc578a67f1
commit 2c5e40369f
1 changed files with 20 additions and 0 deletions
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20
libs/libks/src/ks_mutex.c
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@ -430,6 +430,7 @@ struct ks_rwl {
#ifdef WIN32
SRWLOCK rwlock;
ks_hash_t *read_lock_list;
ks_mutex_t *read_lock_mutex;
#else
pthread_rwlock_t rwlock;
#endif
@ -479,6 +480,10 @@ KS_DECLARE(ks_status_t) ks_rwl_create(ks_rwl_t **rwlock, ks_pool_t *pool)
goto done;
}
if (ks_mutex_create(&check->read_lock_mutex, KS_MUTEX_FLAG_DEFAULT, pool) != KS_STATUS_SUCCESS) {
goto done;
}
InitializeSRWLock(&check->rwlock);
#else
if ((pthread_rwlock_init(&check->rwlock, NULL))) {
@ -496,13 +501,18 @@ KS_DECLARE(ks_status_t) ks_rwl_create(ks_rwl_t **rwlock, ks_pool_t *pool)
KS_DECLARE(ks_status_t) ks_rwl_read_lock(ks_rwl_t *rwlock)
{
#ifdef WIN32
ks_mutex_lock(rwlock->read_lock_mutex);
int count = (int)(intptr_t)ks_hash_remove(rwlock->read_lock_list, (void *)(intptr_t)ks_thread_self());
if (count) {
ks_hash_insert(rwlock->read_lock_list, (void *)(intptr_t)ks_thread_self(), (void *)(intptr_t)++count);
ks_mutex_unlock(rwlock->read_lock_mutex);
return KS_STATUS_SUCCESS;
}
ks_mutex_unlock(rwlock->read_lock_mutex);
AcquireSRWLockShared(&rwlock->rwlock);
#else
@ -511,6 +521,7 @@ KS_DECLARE(ks_status_t) ks_rwl_read_lock(ks_rwl_t *rwlock)
#ifdef WIN32
ks_hash_insert(rwlock->read_lock_list, (void *)(intptr_t)ks_thread_self(), (void *)(intptr_t)(int)1);
ks_mutex_unlock(rwlock->read_lock_mutex);
#endif
return KS_STATUS_SUCCESS;
@ -539,14 +550,18 @@ KS_DECLARE(ks_status_t) ks_rwl_write_lock(ks_rwl_t *rwlock)
KS_DECLARE(ks_status_t) ks_rwl_try_read_lock(ks_rwl_t *rwlock)
{
#ifdef WIN32
ks_mutex_lock(rwlock->read_lock_mutex);
int count = (int)(intptr_t)ks_hash_remove(rwlock->read_lock_list, (void *)(intptr_t)ks_thread_self());
if (count) {
ks_hash_insert(rwlock->read_lock_list, (void *)(intptr_t)ks_thread_self(), (void *)(intptr_t)++count);
ks_mutex_unlock(rwlock->read_lock_mutex);
return KS_STATUS_SUCCESS;
}
if (!TryAcquireSRWLockShared(&rwlock->rwlock)) {
ks_mutex_unlock(rwlock->read_lock_mutex);
return KS_STATUS_FAIL;
}
#else
@ -557,6 +572,7 @@ KS_DECLARE(ks_status_t) ks_rwl_try_read_lock(ks_rwl_t *rwlock)
#ifdef WIN32
ks_hash_insert(rwlock->read_lock_list, (void *)(intptr_t)ks_thread_self(), (void *)(intptr_t)(int)1);
ks_mutex_unlock(rwlock->read_lock_mutex);
#endif
return KS_STATUS_SUCCESS;
@ -589,14 +605,18 @@ KS_DECLARE(ks_status_t) ks_rwl_try_write_lock(ks_rwl_t *rwlock)
KS_DECLARE(ks_status_t) ks_rwl_read_unlock(ks_rwl_t *rwlock)
{
#ifdef WIN32
ks_mutex_lock(rwlock->read_lock_mutex);
int count = (int)(intptr_t)ks_hash_remove(rwlock->read_lock_list, (void *)(intptr_t)ks_thread_self());
if (count > 1) {
ks_hash_insert(rwlock->read_lock_list, (void *)(intptr_t)ks_thread_self(), (void *)(intptr_t)--count);
ks_mutex_unlock(rwlock->read_lock_mutex);
return KS_STATUS_SUCCESS;
}
ReleaseSRWLockShared(&rwlock->rwlock);
ks_mutex_unlock(rwlock->read_lock_mutex);
#else
pthread_rwlock_unlock(&rwlock->rwlock);
#endif