diff options
Diffstat (limited to 'nptl/pthread_mutex_unlock.c')
-rw-r--r-- | nptl/pthread_mutex_unlock.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/nptl/pthread_mutex_unlock.c b/nptl/pthread_mutex_unlock.c index 2b5064f..33919d6 100644 --- a/nptl/pthread_mutex_unlock.c +++ b/nptl/pthread_mutex_unlock.c @@ -202,6 +202,49 @@ __pthread_mutex_unlock_usercnt (mutex, decr) THREAD_SETMEM (THREAD_SELF, robust_head.list_op_pending, NULL); break; + case PTHREAD_MUTEX_PP_RECURSIVE_NP: + /* Recursive mutex. */ + if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid)) + return EPERM; + + if (--mutex->__data.__count != 0) + /* We still hold the mutex. */ + return 0; + goto pp; + + case PTHREAD_MUTEX_PP_ERRORCHECK_NP: + /* Error checking mutex. */ + if (mutex->__data.__owner != THREAD_GETMEM (THREAD_SELF, tid) + || (mutex->__data.__lock & ~ PTHREAD_MUTEX_PRIO_CEILING_MASK) == 0) + return EPERM; + /* FALLTHROUGH */ + + case PTHREAD_MUTEX_PP_NORMAL_NP: + case PTHREAD_MUTEX_PP_ADAPTIVE_NP: + /* Always reset the owner field. */ + pp: + mutex->__data.__owner = 0; + + if (decr) + /* One less user. */ + --mutex->__data.__nusers; + + /* Unlock. */ + int newval, oldval; + do + { + oldval = mutex->__data.__lock; + newval = oldval & PTHREAD_MUTEX_PRIO_CEILING_MASK; + } + while (atomic_compare_and_exchange_bool_acq (&mutex->__data.__lock, + newval, oldval)); + + if ((oldval & ~PTHREAD_MUTEX_PRIO_CEILING_MASK) > 1) + lll_futex_wake (&mutex->__data.__lock, 1); + + int oldprio = newval >> PTHREAD_MUTEX_PRIO_CEILING_SHIFT; + return __pthread_tpp_change_priority (oldprio, -1); + default: /* Correct code cannot set any other type. */ return EINVAL; |