pthreads.hpp Gecode Gecode::Support /*-*-mode:C++;c-basic-offset:2;indent-tabs-mode:nil-*-*/ /* *Mainauthors: *ChristianSchulte<schulte@gecode.org> * *Copyright: *ChristianSchulte,2009 * *Lastmodified: *$Date:2013-07-0107:36:45+0200(Mon,01Jul2013)$by$Author:tack$ *$Revision:13741$ * *ThisfileispartofGecode,thegenericconstraint *developmentenvironment: *http://www.gecode.org * *Permissionisherebygranted,freeofcharge,toanypersonobtaining *acopyofthissoftwareandassociateddocumentationfiles(the *"Software"),todealintheSoftwarewithoutrestriction,including *withoutlimitationtherightstouse,copy,modify,merge,publish, *distribute,sublicense,and/orsellcopiesoftheSoftware,andto *permitpersonstowhomtheSoftwareisfurnishedtodoso,subjectto *thefollowingconditions: * *Theabovecopyrightnoticeandthispermissionnoticeshallbe *includedinallcopiesorsubstantialportionsoftheSoftware. * *THESOFTWAREISPROVIDED"ASIS",WITHOUTWARRANTYOFANYKIND, *EXPRESSORIMPLIED,INCLUDINGBUTNOTLIMITEDTOTHEWARRANTIESOF *MERCHANTABILITY,FITNESSFORAPARTICULARPURPOSEAND *NONINFRINGEMENT.INNOEVENTSHALLTHEAUTHORSORCOPYRIGHTHOLDERSBE *LIABLEFORANYCLAIM,DAMAGESOROTHERLIABILITY,WHETHERINANACTION *OFCONTRACT,TORTOROTHERWISE,ARISINGFROM,OUTOFORINCONNECTION *WITHTHESOFTWAREORTHEUSEOROTHERDEALINGSINTHESOFTWARE. * */ #ifdefGECODE_HAS_UNISTD_H #include<unistd.h> #endif namespaceGecode{namespaceSupport{ /* *Mutex */ forceinline Mutex::Mutex(void){ if(pthread_mutex_init(&p_m,NULL)!=0) throwOperatingSystemError("Mutex::Mutex[pthread_mutex_init]"); } forceinlinevoid Mutex::acquire(void){ if(pthread_mutex_lock(&p_m)!=0) throwOperatingSystemError("Mutex::acquire[pthread_mutex_lock]"); } forceinlinebool Mutex::tryacquire(void){ returnpthread_mutex_trylock(&p_m)==0; } forceinlinevoid Mutex::release(void){ if(pthread_mutex_unlock(&p_m)!=0) throwOperatingSystemError("Mutex::release[pthread_mutex_unlock]"); } forceinline Mutex::~Mutex(void){ if(pthread_mutex_destroy(&p_m)!=0) throwOperatingSystemError("Mutex::~Mutex[pthread_mutex_destroy]"); } #ifdefGECODE_THREADS_OSX /* *FastMutex */ forceinline FastMutex::FastMutex(void):lck(OS_SPINLOCK_INIT){} forceinlinevoid FastMutex::acquire(void){ OSSpinLockLock(&lck); } forceinlinebool FastMutex::tryacquire(void){ returnOSSpinLockTry(&lck); } forceinlinevoid FastMutex::release(void){ OSSpinLockUnlock(&lck); } forceinline FastMutex::~FastMutex(void){} #endif #ifdefGECODE_THREADS_PTHREADS_SPINLOCK /* *FastMutex */ forceinline FastMutex::FastMutex(void){ if(pthread_spin_init(&p_s,PTHREAD_PROCESS_PRIVATE)!=0) throwOperatingSystemError("FastMutex::FastMutex[pthread_spin_init]"); } forceinlinevoid FastMutex::acquire(void){ if(pthread_spin_lock(&p_s)!=0) throwOperatingSystemError("FastMutex::acquire[pthread_spin_lock]"); } forceinlinebool FastMutex::tryacquire(void){ returnpthread_spin_trylock(&p_s)==0; } forceinlinevoid FastMutex::release(void){ if(pthread_spin_unlock(&p_s)!=0) throwOperatingSystemError("FastMutex::release[pthread_spin_unlock]"); } forceinline FastMutex::~FastMutex(void){ if(pthread_spin_destroy(&p_s)!=0) throwOperatingSystemError( "FastMutex::~FastMutex[pthread_spin_destroy]"); } #endif /* *Event */ forceinline Event::Event(void):p_s(false){ if(pthread_mutex_init(&p_m,NULL)!=0) throwOperatingSystemError("Event::Event[pthread_mutex_init]"); if(pthread_cond_init(&p_c,NULL)!=0) throwOperatingSystemError("Event::Event[pthread_cond_init]"); } forceinlinevoid Event::signal(void){ if(pthread_mutex_lock(&p_m)!=0) throwOperatingSystemError("Event::signal[pthread_mutex_lock]"); if(!p_s){ p_s=true; if(pthread_cond_signal(&p_c)!=0) throwOperatingSystemError("Event::signal[pthread_cond_signal]"); } if(pthread_mutex_unlock(&p_m)!=0) throwOperatingSystemError("Event::signal[pthread_mutex_unlock]"); } forceinlinevoid Event::wait(void){ if(pthread_mutex_lock(&p_m)!=0) throwOperatingSystemError("Event::wait[pthread_mutex_lock]"); while(!p_s) if(pthread_cond_wait(&p_c,&p_m)!=0) throwOperatingSystemError("Event::wait[pthread_cond_wait]"); p_s=false; if(pthread_mutex_unlock(&p_m)!=0) throwOperatingSystemError("Event::wait[pthread_mutex_unlock]"); } forceinline Event::~Event(void){ if(pthread_cond_destroy(&p_c)!=0) throwOperatingSystemError("Event::~Event[pthread_cond_destroy]"); if(pthread_mutex_destroy(&p_m)!=0) throwOperatingSystemError("Event::~Event[pthread_mutex_destroy]"); } /* *Thread */ forceinlinevoid Thread::sleep(unsignedintms){ #ifdefGECODE_HAS_UNISTD_H unsignedints=ms/1000; ms-=1000*s; if(s>0){ //Morethanonemillionmicroseconds,usesleep ::sleep(s); } usleep(ms*1000); #endif } forceinlineunsignedint Thread::npu(void){ #ifdefGECODE_HAS_UNISTD_H intn=static_cast<int>(sysconf(_SC_NPROCESSORS_ONLN)); return(n>1)?n:1; #else return1; #endif } }} //STATISTICS:support-any