1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/core/logic/thread/PosixThreads.cpp Wed May 13 21:55:50 2009 -0400
1.3 @@ -0,0 +1,309 @@
1.4 +/**
1.5 + * vim: set ts=4 :
1.6 + * =============================================================================
1.7 + * SourceMod
1.8 + * Copyright (C) 2004-2008 AlliedModders LLC. All rights reserved.
1.9 + * =============================================================================
1.10 + *
1.11 + * This program is free software; you can redistribute it and/or modify it under
1.12 + * the terms of the GNU General Public License, version 3.0, as published by the
1.13 + * Free Software Foundation.
1.14 + *
1.15 + * This program is distributed in the hope that it will be useful, but WITHOUT
1.16 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
1.17 + * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
1.18 + * details.
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License along with
1.21 + * this program. If not, see <http://www.gnu.org/licenses/>.
1.22 + *
1.23 + * As a special exception, AlliedModders LLC gives you permission to link the
1.24 + * code of this program (as well as its derivative works) to "Half-Life 2," the
1.25 + * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
1.26 + * by the Valve Corporation. You must obey the GNU General Public License in
1.27 + * all respects for all other code used. Additionally, AlliedModders LLC grants
1.28 + * this exception to all derivative works. AlliedModders LLC defines further
1.29 + * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
1.30 + * or <http://www.sourcemod.net/license.php>.
1.31 + *
1.32 + * Version: $Id$
1.33 + */
1.34 +
1.35 +#include <unistd.h>
1.36 +#include "PosixThreads.h"
1.37 +#include "ThreadWorker.h"
1.38 +
1.39 +IThreadWorker *PosixThreader::MakeWorker(IThreadWorkerCallbacks *hooks, bool threaded)
1.40 +{
1.41 + if (threaded)
1.42 + {
1.43 + return new ThreadWorker(hooks, this, DEFAULT_THINK_TIME_MS);
1.44 + } else {
1.45 + return new BaseWorker(hooks);
1.46 + }
1.47 +}
1.48 +
1.49 +void PosixThreader::DestroyWorker(IThreadWorker *pWorker)
1.50 +{
1.51 + delete pWorker;
1.52 +}
1.53 +
1.54 +void PosixThreader::ThreadSleep(unsigned int ms)
1.55 +{
1.56 + usleep( ms * 1000 );
1.57 +}
1.58 +
1.59 +void PosixThreader::GetPriorityBounds(ThreadPriority &max, ThreadPriority &min)
1.60 +{
1.61 + max = ThreadPrio_Normal;
1.62 + min = ThreadPrio_Normal;
1.63 +}
1.64 +
1.65 +IMutex *PosixThreader::MakeMutex()
1.66 +{
1.67 + pthread_mutex_t mutex;
1.68 +
1.69 + if (pthread_mutex_init(&mutex, NULL) != 0)
1.70 + return NULL;
1.71 +
1.72 + PosixMutex *pMutex = new PosixMutex(mutex);
1.73 +
1.74 + return pMutex;
1.75 +}
1.76 +
1.77 +
1.78 +void PosixThreader::MakeThread(IThread *pThread)
1.79 +{
1.80 + ThreadParams defparams;
1.81 +
1.82 + defparams.flags = Thread_AutoRelease;
1.83 + defparams.prio = ThreadPrio_Normal;
1.84 +
1.85 + MakeThread(pThread, &defparams);
1.86 +}
1.87 +
1.88 +IThreadHandle *PosixThreader::MakeThread(IThread *pThread, ThreadFlags flags)
1.89 +{
1.90 + ThreadParams defparams;
1.91 +
1.92 + defparams.flags = flags;
1.93 + defparams.prio = ThreadPrio_Normal;
1.94 +
1.95 + return MakeThread(pThread, &defparams);
1.96 +}
1.97 +
1.98 +void *Posix_ThreadGate(void *param)
1.99 +{
1.100 + PosixThreader::ThreadHandle *pHandle =
1.101 + reinterpret_cast<PosixThreader::ThreadHandle *>(param);
1.102 +
1.103 + //Block this thread from being started initially.
1.104 + pthread_mutex_lock(&pHandle->m_runlock);
1.105 + //if we get here, we've obtained the lock and are allowed to run.
1.106 + //unlock and continue.
1.107 + pthread_mutex_unlock(&pHandle->m_runlock);
1.108 +
1.109 + pHandle->m_run->RunThread(pHandle);
1.110 +
1.111 + ThreadParams params;
1.112 + pthread_mutex_lock(&pHandle->m_statelock);
1.113 + pHandle->m_state = Thread_Done;
1.114 + pHandle->GetParams(¶ms);
1.115 + pthread_mutex_unlock(&pHandle->m_statelock);
1.116 +
1.117 + pHandle->m_run->OnTerminate(pHandle, false);
1.118 + if (params.flags & Thread_AutoRelease)
1.119 + delete pHandle;
1.120 +
1.121 + return 0;
1.122 +}
1.123 +
1.124 +ThreadParams g_defparams;
1.125 +IThreadHandle *PosixThreader::MakeThread(IThread *pThread, const ThreadParams *params)
1.126 +{
1.127 + if (params == NULL)
1.128 + params = &g_defparams;
1.129 +
1.130 + PosixThreader::ThreadHandle *pHandle =
1.131 + new PosixThreader::ThreadHandle(this, pThread, params);
1.132 +
1.133 + pthread_mutex_lock(&pHandle->m_runlock);
1.134 +
1.135 + int err;
1.136 + err = pthread_create(&pHandle->m_thread, NULL, Posix_ThreadGate, (void *)pHandle);
1.137 +
1.138 + if (err != 0)
1.139 + {
1.140 + pthread_mutex_unlock(&pHandle->m_runlock);
1.141 + delete pHandle;
1.142 + return NULL;
1.143 + }
1.144 +
1.145 + //Don't bother setting priority...
1.146 +
1.147 + if (!(pHandle->m_params.flags & Thread_CreateSuspended))
1.148 + {
1.149 + pHandle->m_state = Thread_Running;
1.150 + err = pthread_mutex_unlock(&pHandle->m_runlock);
1.151 + if (err != 0)
1.152 + pHandle->m_state = Thread_Paused;
1.153 + }
1.154 +
1.155 + return pHandle;
1.156 +}
1.157 +
1.158 +IEventSignal *PosixThreader::MakeEventSignal()
1.159 +{
1.160 + return new PosixEventSignal();
1.161 +}
1.162 +
1.163 +/*****************
1.164 +**** Mutexes ****
1.165 +*****************/
1.166 +
1.167 +PosixThreader::PosixMutex::~PosixMutex()
1.168 +{
1.169 + pthread_mutex_destroy(&m_mutex);
1.170 +}
1.171 +
1.172 +bool PosixThreader::PosixMutex::TryLock()
1.173 +{
1.174 + int err = pthread_mutex_trylock(&m_mutex);
1.175 +
1.176 + return (err == 0);
1.177 +}
1.178 +
1.179 +void PosixThreader::PosixMutex::Lock()
1.180 +{
1.181 + pthread_mutex_lock(&m_mutex);
1.182 +}
1.183 +
1.184 +void PosixThreader::PosixMutex::Unlock()
1.185 +{
1.186 + pthread_mutex_unlock(&m_mutex);
1.187 +}
1.188 +
1.189 +void PosixThreader::PosixMutex::DestroyThis()
1.190 +{
1.191 + delete this;
1.192 +}
1.193 +
1.194 +/******************
1.195 +* Thread Handles *
1.196 +******************/
1.197 +
1.198 +PosixThreader::ThreadHandle::ThreadHandle(IThreader *parent, IThread *run, const ThreadParams *params) :
1.199 + m_parent(parent), m_params(*params), m_run(run), m_state(Thread_Paused)
1.200 +{
1.201 + pthread_mutex_init(&m_runlock, NULL);
1.202 + pthread_mutex_init(&m_statelock, NULL);
1.203 +}
1.204 +
1.205 +PosixThreader::ThreadHandle::~ThreadHandle()
1.206 +{
1.207 + pthread_mutex_destroy(&m_runlock);
1.208 + pthread_mutex_destroy(&m_statelock);
1.209 +}
1.210 +
1.211 +bool PosixThreader::ThreadHandle::WaitForThread()
1.212 +{
1.213 + void *arg;
1.214 +
1.215 + if (pthread_join(m_thread, &arg) != 0)
1.216 + return false;
1.217 +
1.218 + return true;
1.219 +}
1.220 +
1.221 +ThreadState PosixThreader::ThreadHandle::GetState()
1.222 +{
1.223 + ThreadState state;
1.224 +
1.225 + pthread_mutex_lock(&m_statelock);
1.226 + state = m_state;
1.227 + pthread_mutex_unlock(&m_statelock);
1.228 +
1.229 + return state;
1.230 +}
1.231 +
1.232 +IThreadCreator *PosixThreader::ThreadHandle::Parent()
1.233 +{
1.234 + return m_parent;
1.235 +}
1.236 +
1.237 +void PosixThreader::ThreadHandle::DestroyThis()
1.238 +{
1.239 + if (m_params.flags & Thread_AutoRelease)
1.240 + return;
1.241 +
1.242 + delete this;
1.243 +}
1.244 +
1.245 +void PosixThreader::ThreadHandle::GetParams(ThreadParams *ptparams)
1.246 +{
1.247 + if (!ptparams)
1.248 + return;
1.249 +
1.250 + *ptparams = m_params;
1.251 +}
1.252 +
1.253 +ThreadPriority PosixThreader::ThreadHandle::GetPriority()
1.254 +{
1.255 + return ThreadPrio_Normal;
1.256 +}
1.257 +
1.258 +bool PosixThreader::ThreadHandle::SetPriority(ThreadPriority prio)
1.259 +{
1.260 + return (prio == ThreadPrio_Normal);
1.261 +}
1.262 +
1.263 +bool PosixThreader::ThreadHandle::Unpause()
1.264 +{
1.265 + if (m_state != Thread_Paused)
1.266 + return false;
1.267 +
1.268 + m_state = Thread_Running;
1.269 +
1.270 + if (pthread_mutex_unlock(&m_runlock) != 0)
1.271 + {
1.272 + m_state = Thread_Paused;
1.273 + return false;
1.274 + }
1.275 +
1.276 + return true;
1.277 +}
1.278 +
1.279 +/*****************
1.280 + * EVENT SIGNALS *
1.281 + *****************/
1.282 +
1.283 +PosixThreader::PosixEventSignal::PosixEventSignal()
1.284 +{
1.285 + pthread_cond_init(&m_cond, NULL);
1.286 + pthread_mutex_init(&m_mutex, NULL);
1.287 +}
1.288 +
1.289 +PosixThreader::PosixEventSignal::~PosixEventSignal()
1.290 +{
1.291 + pthread_cond_destroy(&m_cond);
1.292 + pthread_mutex_destroy(&m_mutex);
1.293 +}
1.294 +
1.295 +void PosixThreader::PosixEventSignal::Wait()
1.296 +{
1.297 + pthread_mutex_lock(&m_mutex);
1.298 + pthread_cond_wait(&m_cond, &m_mutex);
1.299 + pthread_mutex_unlock(&m_mutex);
1.300 +}
1.301 +
1.302 +void PosixThreader::PosixEventSignal::Signal()
1.303 +{
1.304 + pthread_mutex_lock(&m_mutex);
1.305 + pthread_cond_broadcast(&m_cond);
1.306 + pthread_mutex_unlock(&m_mutex);
1.307 +}
1.308 +
1.309 +void PosixThreader::PosixEventSignal::DestroyThis()
1.310 +{
1.311 + delete this;
1.312 +}
