/*---------------------------------------------------------------  * 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. * ------------------------------------------------------------------- */#ifndef CONDITION_H#define CONDITION_H#include "headers.h"#include "Mutex.h"#include "util.h"#if   defined( HAVE_POSIX_THREAD )typedef struct Condition {    pthread_cond_t mCondition;    pthread_mutex_t mMutex;} Condition;#elif defined( HAVE_WIN32_THREAD )typedef struct Condition {    HANDLE mCondition;    HANDLE mMutex;} Condition;#elsetypedef struct Condition {    int mCondition;    int mMutex;} Condition;#endif#define Condition_Lock( Cond ) Mutex_Lock( &Cond.mMutex )#define Condition_Unlock( Cond ) Mutex_Unlock( &Cond.mMutex )    // initialize condition#if   defined( HAVE_POSIX_THREAD )    #define Condition_Initialize( Cond ) do {             \        Mutex_Initialize( &(Cond)->mMutex );              \        pthread_cond_init( &(Cond)->mCondition, NULL );   \    } while ( 0 )#elif defined( HAVE_WIN32_THREAD )    // set all conditions to be broadcast    // unfortunately in Win32 you have to know at creation    // whether the signal is broadcast or not.    #define Condition_Initialize( Cond ) do {                         \        Mutex_Initialize( &(Cond)->mMutex );                          \        (Cond)->mCondition = CreateEvent( NULL, true, false, NULL );  \    } while ( 0 )#else    #define Condition_Initialize( Cond )#endif    // destroy condition#if   defined( HAVE_POSIX_THREAD )    #define Condition_Destroy( Cond ) do {            \        pthread_cond_destroy( &(Cond)->mCondition );  \        Mutex_Destroy( &(Cond)->mMutex );             \    } while ( 0 )#elif defined( HAVE_WIN32_THREAD )    #define Condition_Destroy( Cond ) do {            \        CloseHandle( (Cond)->mCondition );            \        Mutex_Destroy( &(Cond)->mMutex );             \    } while ( 0 )#else    #define Condition_Destroy( Cond )#endif    // sleep this thread, waiting for condition signal#if   defined( HAVE_POSIX_THREAD )    #define Condition_Wait( Cond ) pthread_cond_wait( &(Cond)->mCondition, &(Cond)->mMutex )#elif defined( 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.#if   defined( 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 )#elif defined( 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#if   defined( HAVE_POSIX_THREAD )    #define Condition_Signal( Cond ) pthread_cond_signal( &(Cond)->mCondition )#elif defined( 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#if   defined( HAVE_POSIX_THREAD )    #define Condition_Broadcast( Cond ) pthread_cond_broadcast( &(Cond)->mCondition )#elif defined( HAVE_WIN32_THREAD )    #define Condition_Broadcast( Cond ) PulseEvent( (Cond)->mCondition )#else    #define Condition_Broadcast( Cond )#endif#endif // CONDITION_H