178 lines
3.3 KiB
C++
178 lines
3.3 KiB
C++
/*
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* Copyright 2008 Free Software Foundation, Inc.
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*
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* This software is distributed under the terms of the GNU Affero Public License.
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* See the COPYING file in the main directory for details.
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*
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* This use of this software may be subject to additional restrictions.
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* See the LEGAL file in the main directory for details.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "Threads.h"
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#include "Timeval.h"
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#include <errno.h>
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using namespace std;
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Mutex gStreamLock; ///< Global lock to control access to cout and cerr.
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void lockCout()
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{
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gStreamLock.lock();
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Timeval entryTime;
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cout << entryTime << " " << pthread_self() << ": ";
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}
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void unlockCout()
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{
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cout << dec << endl << flush;
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gStreamLock.unlock();
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}
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void lockCerr()
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{
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gStreamLock.lock();
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Timeval entryTime;
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cerr << entryTime << " " << pthread_self() << ": ";
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}
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void unlockCerr()
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{
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cerr << dec << endl << flush;
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gStreamLock.unlock();
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}
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Mutex::Mutex()
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{
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pthread_mutexattr_init(&mAttribs);
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int s = pthread_mutexattr_settype(&mAttribs,PTHREAD_MUTEX_RECURSIVE);
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assert(s==0);
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pthread_mutex_init(&mMutex,&mAttribs);
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}
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Mutex::~Mutex()
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{
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pthread_mutex_destroy(&mMutex);
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pthread_mutexattr_destroy(&mAttribs);
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}
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/** Block for the signal up to the cancellation timeout. */
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void Signal::wait(Mutex& wMutex, unsigned timeout) const
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{
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Timeval then(timeout);
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struct timespec waitTime = then.timespec();
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pthread_cond_timedwait(&mSignal,&wMutex.mMutex,&waitTime);
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}
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ThreadSemaphore::Result ThreadSemaphore::wait(unsigned timeoutMs)
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{
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Timeval then(timeoutMs);
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struct timespec waitTime = then.timespec();
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int s;
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while ((s = sem_timedwait(&mSem,&waitTime)) == -1 && errno == EINTR)
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continue;
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if (s == -1)
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{
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if (errno == ETIMEDOUT)
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{
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return TSEM_TIMEOUT;
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}
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return TSEM_ERROR;
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}
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return TSEM_OK;
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}
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ThreadSemaphore::Result ThreadSemaphore::wait()
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{
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int s;
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while ((s = sem_wait(&mSem)) == -1 && errno == EINTR)
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continue;
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if (s == -1)
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{
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return TSEM_ERROR;
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}
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return TSEM_OK;
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}
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ThreadSemaphore::Result ThreadSemaphore::trywait()
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{
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int s;
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while ((s = sem_trywait(&mSem)) == -1 && errno == EINTR)
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continue;
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if (s == -1)
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{
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if (errno == EAGAIN)
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{
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return TSEM_TIMEOUT;
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}
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return TSEM_ERROR;
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}
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return TSEM_OK;
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}
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ThreadSemaphore::Result ThreadSemaphore::post()
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{
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if (sem_post(&mSem) != 0)
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{
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if (errno == EOVERFLOW)
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{
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return TSEM_OVERFLOW;
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}
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return TSEM_ERROR;
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}
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return TSEM_OK;
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}
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void Thread::start(void *(*task)(void*), void *arg)
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{
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int s;
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assert(mThread==((pthread_t)0));
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s = pthread_attr_init(&mAttrib);
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assert(s == 0);
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s = pthread_attr_setstacksize(&mAttrib, mStackSize);
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assert(s == 0);
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s = pthread_create(&mThread, &mAttrib, task, arg);
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assert(s == 0);
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}
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// vim: ts=4 sw=4
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