hphp/neo/ulocks.h

   1 /*
   2  *
   3  * Thread-safe Skiplist Using Integer Identifiers
   4  * Copyright 1998-2000 Scott Shambarger (scott@shambarger.net)
   5  *
   6  * This software is open source. Permission to use, copy, modify, and
   7  * distribute this software for any purpose and without fee is hereby granted,
   8  * provided that the above copyright notice appear in all copies.  No
   9  * warranty of any kind is expressed or implied.  Use at your own risk.
  10  *
  11  * 1/14/2001 blong
  12  *   Made it use neo errs... probably need to check locking functions
  13  *   for error returns...
  14  *
  15  */
  16
  17 #ifndef incl_HPHP_ULOCKS_H_
  18 #define incl_HPHP_ULOCKS_H_
  19
  20 #ifdef HAVE_PTHREADS
  21
  22 #include <pthread.h>
  23
  24 NEOERR *mLock(pthread_mutex_t *mutex);
  25 /*
  26  * Function:    mLock - lock a mutex.
  27  * Description: Locks the mutex <mutex>.  This call blocks until the mutex
  28  *              is acquired.
  29  * Input:       mutex - mutex to lock.
  30  * Output:      None.
  31  * Return:      STATUS_OK on success
  32  *              NERR_LOCK on failure
  33  * MT-Level:    Safe.
  34  */
  35
  36 NEOERR *mUnlock(pthread_mutex_t *mutex);
  37 /*
  38  * Function:    mUnlock - unlock a mutex.
  39  * Description: Unlocks the mutex <mutex>.
  40  * Input:       mutex - mutex to unlock.
  41  * Output:      None.
  42  * Return:      STATUS_OK on success
  43  *              NERR_LOCK on failure
  44  * MT-Level:    Safe.
  45  */
  46
  47 #endif /* HAVE_PTHREAD */
  48
  49 #endif                                                       /* incl_HPHP_ULOCKS_H_ */