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Add the ability to downgrade a write variant of the cglocks.

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This commit is contained in:
Con Kolivas 2013-08-12 00:11:49 +10:00
parent 3e84a19cda
commit 9552f54f43
1 changed files with 20 additions and 1 deletions
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21
miner.h
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@ -754,17 +754,28 @@ static inline void rw_unlock(pthread_rwlock_t *lock)
{
if (unlikely(pthread_rwlock_unlock(lock)))
quit(1, "WTF RWLOCK ERROR ON UNLOCK!");
sched_yield();
}
static inline void rd_unlock_noyield(pthread_rwlock_t *lock)
{
rw_unlock(lock);
}
static inline void wr_unlock_noyield(pthread_rwlock_t *lock)
{
rw_unlock(lock);
}
static inline void rd_unlock(pthread_rwlock_t *lock)
{
rw_unlock(lock);
sched_yield();
}
static inline void wr_unlock(pthread_rwlock_t *lock)
{
rw_unlock(lock);
sched_yield();
}
static inline void mutex_init(pthread_mutex_t *lock)
@ -820,6 +831,14 @@ static inline void cg_wlock(cglock_t *lock)
wr_lock(&lock->rwlock);
}
/* Downgrade write variant to a read lock */
static inline void cg_dwlock(cglock_t *lock)
{
wr_unlock_noyield(&lock->rwlock);
rd_lock(&lock->rwlock);
mutex_unlock_noyield(&lock->mutex);
}
/* Downgrade intermediate variant to a read lock */
static inline void cg_dlock(cglock_t *lock)
{