diff options
Diffstat (limited to 'src/thread')
| -rw-r--r-- | src/thread/pthread_barrier_wait.c | 23 | ||||
| -rw-r--r-- | src/thread/pthread_mutex_unlock.c | 8 | ||||
| -rw-r--r-- | src/thread/vmlock.c | 22 |
3 files changed, 33 insertions, 20 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; } diff --git a/src/thread/pthread_mutex_unlock.c b/src/thread/pthread_mutex_unlock.c index fdf9fc10..5fc0f4e5 100644 --- a/src/thread/pthread_mutex_unlock.c +++ b/src/thread/pthread_mutex_unlock.c @@ -1,5 +1,8 @@ #include "pthread_impl.h" +void __vm_lock_impl(int); +void __vm_unlock_impl(void); + int pthread_mutex_unlock(pthread_mutex_t *m) { pthread_t self; @@ -20,11 +23,14 @@ int pthread_mutex_unlock(pthread_mutex_t *m) self->robust_list.pending = &m->_m_next; *(void **)m->_m_prev = m->_m_next; if (m->_m_next) ((void **)m->_m_next)[-1] = m->_m_prev; + __vm_lock_impl(+1); } } cont = a_swap(&m->_m_lock, 0); - if (robust) + if (robust) { self->robust_list.pending = 0; + __vm_unlock_impl(); + } if (waiters || cont<0) __wake(&m->_m_lock, 1, 0); return 0; diff --git a/src/thread/vmlock.c b/src/thread/vmlock.c new file mode 100644 index 00000000..aba9e311 --- /dev/null +++ b/src/thread/vmlock.c @@ -0,0 +1,22 @@ +#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); +} + +weak_alias(__vm_lock, __vm_lock_impl); +weak_alias(__vm_unlock, __vm_unlock_impl); |