kc3-lang/libevent/evthread-internal.h

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• Hash : 28255a26
  Author :
  Date : 2009-04-05T04:26:46
  

  Finally, get unit tests to pass with threading turned off again.
  
  svn:r1137
  

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• evthread-internal.h

• /*
   * Copyright (c) 2008 Niels Provos <provos@citi.umich.edu>
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. The name of the author may not be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  #ifndef _EVTHREAD_INTERNAL_H_
  #define _EVTHREAD_INTERNAL_H_
  
  #ifdef __cplusplus
  //extern "C" {
  #endif
  
  #include "event-config.h"
  #include "util-internal.h"
  
  struct event_base;
  
  #ifndef _EVENT_DISABLE_THREAD_SUPPORT
  extern void (*_evthread_locking_fn)(int mode, void *lock);
  extern unsigned long (*_evthread_id_fn)(void);
  extern void *(*_evthread_lock_alloc_fn)(void);
  extern void (*_evthread_lock_free_fn)(void *);
  
  #define EVBASE_USING_LOCKS(base)			\
  	(base != NULL && (base)->th_base_lock != NULL)
  
  #define EVTHREAD_GET_ID() \
  	(_evthread_id_fn ? _evthread_id_fn() : 1)
  
  #define EVBASE_IN_THREAD(base)				 \
  	(_evthread_id_fn == NULL ||			 \
  	(base)->th_owner_id == _evthread_id_fn())
  
  #define EVTHREAD_ALLOC_LOCK(lockvar)		\
  	((lockvar) = _evthread_lock_alloc_fn ?	\
  	    _evthread_lock_alloc_fn() : NULL)
  
  #define EVTHREAD_FREE_LOCK(lockvar)				\
  	do {							\
  		if (lockvar && _evthread_lock_free_fn)		\
  			_evthread_lock_free_fn(lockvar);	\
  	} while (0)
  
  #define EVLOCK_LOCK(lock,mode)					\
  	do {								\
  		if (lock)						\
  			_evthread_locking_fn(EVTHREAD_LOCK|mode, lock);	\
  	} while (0)
  #define EVLOCK_UNLOCK(lock,mode)					\
  	do {								\
  		if (lock)						\
  			_evthread_locking_fn(EVTHREAD_UNLOCK|mode, lock); \
  	} while (0)
  #define _EVLOCK_SORTLOCKS(lockvar1, lockvar2)				\
  	do {								\
  		if (lockvar1 && lockvar2 && lockvar1 > lockvar2) {	\
  			void *tmp = lockvar1;				\
  			lockvar1 = lockvar2;				\
  			lockvar2 = tmp;					\
  		}							\
  	} while (0)
  
  #define EVLOCK_LOCK2(lock1,lock2,mode1,mode2)				\
  	do {								\
  		void *_lock1_tmplock = (lock1);				\
  		void *_lock2_tmplock = (lock2);				\
  		_EVLOCK_SORTLOCKS(_lock1_tmplock,_lock2_tmplock);	\
  		EVLOCK_LOCK(_lock1_tmplock,mode1);			\
                  if (_lock2_tmplock != _lock1_tmplock)                   \
                          EVLOCK_LOCK(_lock2_tmplock,mode2);              \
  	} while (0)
  
  #define EVLOCK_UNLOCK2(lock1,lock2,mode1,mode2)				\
  	do {								\
  		void *_lock1_tmplock = (lock1);				\
  		void *_lock2_tmplock = (lock2);				\
  		_EVLOCK_SORTLOCKS(_lock1_tmplock,_lock2_tmplock);	\
                  if (_lock2_tmplock != _lock1_tmplock)                   \
                          EVLOCK_UNLOCK(_lock2_tmplock,mode2);            \
  		EVLOCK_UNLOCK(_lock1_tmplock,mode1);			\
  	} while (0)
  
  
  #define EVBASE_ACQUIRE_LOCK(base, mode, lock) do {			\
  		if (EVBASE_USING_LOCKS(base))				\
  			_evthread_locking_fn(EVTHREAD_LOCK | mode,	\
  			    (base)->lock);				\
  	} while (0)
  
  #define EVBASE_RELEASE_LOCK(base, mode, lock) do {			\
  		if (EVBASE_USING_LOCKS(base))				\
  			_evthread_locking_fn(EVTHREAD_UNLOCK | mode,	\
  			    (base)->lock);				\
  	} while (0)
  #else /* _EVENT_DISABLE_THREAD_SUPPORT */
  
  #define EVTHREAD_GET_ID()	1
  #define EVTHREAD_ALLOC_LOCK(lockvar) _EVUTIL_NIL_STMT
  #define EVTHREAD_FREE_LOCK(lockvar) _EVUTIL_NIL_STMT
  
  #define EVLOCK_LOCK(lockvar, mode) _EVUTIL_NIL_STMT
  #define EVLOCK_UNLOCK(lockvar, mode) _EVUTIL_NIL_STMT
  #define EVLOCK_LOCK2(lock1,lock2,mode1,mode2) _EVUTIL_NIL_STMT
  #define EVLOCK_UNLOCK2(lock1,lock2,mode1,mode2) _EVUTIL_NIL_STMT
  
  #define EVBASE_IN_THREAD(base)	1
  #define EVBASE_ACQUIRE_LOCK(base, mode, lock) _EVUTIL_NIL_STMT
  #define EVBASE_RELEASE_LOCK(base, mode, lock) _EVUTIL_NIL_STMT
  
  #endif
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* _EVTHREAD_INTERNAL_H_ */
  

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