/*--------------------------------------------------------------- * Copyright (c) 1999,2000,2001,2002,2003 * The Board of Trustees of the University of Illinois * All Rights Reserved. *--------------------------------------------------------------- * Permission is hereby granted, free of charge, to any person * obtaining a copy of this software (Iperf) and associated * documentation files (the "Software"), to deal in the Software * without restriction, including without limitation the * rights to use, copy, modify, merge, publish, distribute, * sublicense, and/or sell copies of the Software, and to permit * persons to whom the Software is furnished to do * so, subject to the following conditions: * * * Redistributions of source code must retain the above * copyright notice, this list of conditions and * the following disclaimers. * * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimers in the documentation and/or other materials * provided with the distribution. * * * Neither the names of the University of Illinois, NCSA, * nor the names of its contributors may be used to endorse * or promote products derived from this Software without * specific prior written permission. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE CONTIBUTORS OR COPYRIGHT * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * ________________________________________________________________ * National Laboratory for Applied Network Research * National Center for Supercomputing Applications * University of Illinois at Urbana-Champaign * http://www.ncsa.uiuc.edu * ________________________________________________________________ * * Condition.h * by Mark Gates <mgates@nlanr.net> * ------------------------------------------------------------------- * An abstract class for waiting on a condition variable. If * threads are not available, this does nothing.
* ------------------------------------------------------------------- */
// sleep this thread, waiting for condition signal #ifdefined( HAVE_POSIX_THREAD ) #define Condition_Wait( Cond ) pthread_cond_wait( &(Cond)->mCondition, &(Cond)->mMutex ) #elifdefined( HAVE_WIN32_THREAD ) // atomically release mutex and wait on condition, // then re-acquire the mutex #define Condition_Wait( Cond ) do { \
SignalObjectAndWait( (Cond)->mMutex, (Cond)->mCondition, INFINITE, false ); \
Mutex_Lock( &(Cond)->mMutex ); \
} while ( 0 ) #else #define Condition_Wait( Cond ) #endif
// sleep this thread, waiting for condition signal, // but bound sleep time by the relative time inSeconds. #ifdefined( HAVE_POSIX_THREAD ) #define Condition_TimedWait( Cond, inSeconds ) do { \ struct timespec absTimeout; \
absTimeout.tv_sec = time( NULL ) + inSeconds; \
absTimeout.tv_nsec = 0; \
pthread_cond_timedwait( &(Cond)->mCondition, &(Cond)->mMutex, &absTimeout ); \
} while ( 0 ) #elifdefined( HAVE_WIN32_THREAD ) // atomically release mutex and wait on condition, // then re-acquire the mutex #define Condition_TimedWait( Cond, inSeconds ) do { \
SignalObjectAndWait( (Cond)->mMutex, (Cond)->mCondition, inSeconds*1000, false ); \
Mutex_Lock( &(Cond)->mMutex ); \
} while ( 0 ) #else #define Condition_TimedWait( Cond, inSeconds ) #endif
// send a condition signal to wake one thread waiting on condition // in Win32, this actually wakes up all threads, same as Broadcast // use PulseEvent to auto-reset the signal after waking all threads #ifdefined( HAVE_POSIX_THREAD ) #define Condition_Signal( Cond ) pthread_cond_signal( &(Cond)->mCondition ) #elifdefined( HAVE_WIN32_THREAD ) #define Condition_Signal( Cond ) PulseEvent( (Cond)->mCondition ) #else #define Condition_Signal( Cond ) #endif
// send a condition signal to wake all threads waiting on condition #ifdefined( HAVE_POSIX_THREAD ) #define Condition_Broadcast( Cond ) pthread_cond_broadcast( &(Cond)->mCondition ) #elifdefined( HAVE_WIN32_THREAD ) #define Condition_Broadcast( Cond ) PulseEvent( (Cond)->mCondition ) #else #define Condition_Broadcast( Cond ) #endif
#endif// CONDITION_H
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