diff options
Diffstat (limited to 'src/thread/pthread_barrier_wait.c')
| -rw-r--r-- | src/thread/pthread_barrier_wait.c | 23 |
1 files changed, 4 insertions, 19 deletions
diff --git a/src/thread/pthread_barrier_wait.c b/src/thread/pthread_barrier_wait.c index 6052925a..5e603380 100644 --- a/src/thread/pthread_barrier_wait.c +++ b/src/thread/pthread_barrier_wait.c @@ -1,22 +1,7 @@ #include "pthread_impl.h" -static int vmlock[2]; - -void __vm_lock(int inc) -{ - for (;;) { - int v = vmlock[0]; - if (inc*v < 0) __wait(vmlock, vmlock+1, v, 1); - else if (a_cas(vmlock, v, v+inc)==v) break; - } -} - -void __vm_unlock(void) -{ - int inc = vmlock[0]>0 ? -1 : 1; - if (a_fetch_add(vmlock, inc)==-inc && vmlock[1]) - __wake(vmlock, -1, 1); -} +void __vm_lock_impl(int); +void __vm_unlock_impl(void); static int pshared_barrier_wait(pthread_barrier_t *b) { @@ -41,7 +26,7 @@ static int pshared_barrier_wait(pthread_barrier_t *b) __wait(&b->_b_count, &b->_b_waiters2, v, 0); } - __vm_lock(+1); + __vm_lock_impl(+1); /* Ensure all threads have a vm lock before proceeding */ if (a_fetch_add(&b->_b_count, -1)==1-limit) { @@ -62,7 +47,7 @@ static int pshared_barrier_wait(pthread_barrier_t *b) if (v==INT_MIN+1 || (v==1 && w)) __wake(&b->_b_lock, 1, 0); - __vm_unlock(); + __vm_unlock_impl(); return ret; } |