author | Mathieu Lacage <mathieu.lacage@sophia.inria.fr> |
Sat, 04 Jul 2009 08:15:48 +0200 | |
changeset 4654 | 2eaebe77d66b |
parent 3434 | ee113f8d83db |
permissions | -rw-r--r-- |
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
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/* |
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* Copyright (c) 2008 University of Washington |
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* |
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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 General Public License version 2 as |
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* published by the Free Software Foundation; |
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* |
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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 General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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|
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#include <pthread.h> |
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#include <errno.h> |
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#include <sys/time.h> |
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#include "fatal-error.h" |
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#include "system-condition.h" |
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#include "log.h" |
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NS_LOG_COMPONENT_DEFINE ("SystemCondition"); |
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namespace ns3 { |
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class SystemConditionPrivate { |
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public: |
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static const uint64_t NS_PER_SEC = (uint64_t)1000000000; |
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SystemConditionPrivate (); |
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~SystemConditionPrivate (); |
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void SetCondition (bool condition); |
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bool GetCondition (void); |
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void Signal (void); |
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void Broadcast (void); |
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void Wait (void); |
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bool TimedWait (uint64_t ns); |
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private: |
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pthread_mutex_t m_mutex; |
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pthread_cond_t m_cond; |
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bool m_condition; |
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}; |
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SystemConditionPrivate::SystemConditionPrivate () |
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{ |
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NS_LOG_FUNCTION_NOARGS (); |
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m_condition = false; |
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pthread_mutexattr_t mAttr; |
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pthread_mutexattr_init (&mAttr); |
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// |
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// Linux and OS X (at least) have, of course chosen different names for the |
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// error checking flags just to make life difficult. |
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// |
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#if defined (PTHREAD_MUTEX_ERRORCHECK_NP) |
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pthread_mutexattr_settype (&mAttr, PTHREAD_MUTEX_ERRORCHECK_NP); |
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#else |
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pthread_mutexattr_settype (&mAttr, PTHREAD_MUTEX_ERRORCHECK); |
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#endif |
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pthread_mutex_init (&m_mutex, &mAttr); |
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pthread_condattr_t cAttr; |
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pthread_condattr_init (&cAttr); |
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pthread_condattr_setpshared (&cAttr, PTHREAD_PROCESS_PRIVATE); |
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pthread_cond_init (&m_cond, &cAttr); |
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} |
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SystemConditionPrivate::~SystemConditionPrivate() |
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{ |
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NS_LOG_FUNCTION_NOARGS (); |
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pthread_mutex_destroy (&m_mutex); |
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pthread_cond_destroy (&m_cond); |
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} |
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void |
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SystemConditionPrivate::SetCondition (bool condition) |
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{ |
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NS_LOG_FUNCTION_NOARGS (); |
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m_condition = condition; |
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} |
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bool |
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SystemConditionPrivate::GetCondition (void) |
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{ |
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NS_LOG_FUNCTION_NOARGS (); |
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return m_condition; |
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} |
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void |
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SystemConditionPrivate::Signal (void) |
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{ |
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NS_LOG_FUNCTION_NOARGS (); |
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pthread_mutex_lock (&m_mutex); |
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pthread_cond_signal (&m_cond); |
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pthread_mutex_unlock (&m_mutex); |
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} |
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void |
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SystemConditionPrivate::Broadcast (void) |
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{ |
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NS_LOG_FUNCTION_NOARGS (); |
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pthread_mutex_lock (&m_mutex); |
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pthread_cond_broadcast (&m_cond); |
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pthread_mutex_unlock (&m_mutex); |
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} |
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void |
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SystemConditionPrivate::Wait (void) |
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{ |
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NS_LOG_FUNCTION_NOARGS (); |
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pthread_mutex_lock (&m_mutex); |
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m_condition = false; |
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while (m_condition == false) |
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{ |
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pthread_cond_wait (&m_cond, &m_mutex); |
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} |
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pthread_mutex_unlock (&m_mutex); |
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} |
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bool |
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SystemConditionPrivate::TimedWait (uint64_t ns) |
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{ |
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NS_LOG_FUNCTION_NOARGS (); |
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134 |
|
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struct timespec ts; |
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ts.tv_sec = ns / NS_PER_SEC; |
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ts.tv_nsec = ns % NS_PER_SEC; |
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138 |
|
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struct timeval tv; |
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gettimeofday(&tv, NULL); |
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141 |
|
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ts.tv_sec += tv.tv_sec; |
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ts.tv_nsec += tv.tv_usec * 1000; |
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if (ts.tv_nsec > (int64_t)NS_PER_SEC) |
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{ |
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++ts.tv_sec; |
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ts.tv_nsec %= NS_PER_SEC; |
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148 |
} |
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149 |
|
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int rc; |
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151 |
|
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pthread_mutex_lock (&m_mutex); |
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while (m_condition == false) |
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{ |
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rc = pthread_cond_timedwait (&m_cond, &m_mutex, &ts); |
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if (rc == ETIMEDOUT) |
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{ |
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pthread_mutex_unlock (&m_mutex); |
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return true; |
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160 |
} |
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161 |
} |
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pthread_mutex_unlock (&m_mutex); |
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return false; |
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164 |
} |
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165 |
|
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166 |
SystemCondition::SystemCondition() |
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: m_priv (new SystemConditionPrivate ()) |
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{ |
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NS_LOG_FUNCTION_NOARGS (); |
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} |
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171 |
|
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SystemCondition::~SystemCondition () |
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{ |
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NS_LOG_FUNCTION_NOARGS (); |
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delete m_priv; |
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} |
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177 |
|
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178 |
void |
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SystemCondition::SetCondition (bool condition) |
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{ |
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NS_LOG_FUNCTION_NOARGS (); |
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m_priv->SetCondition (condition); |
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} |
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184 |
|
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bool |
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SystemCondition::GetCondition (void) |
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187 |
{ |
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188 |
NS_LOG_FUNCTION_NOARGS (); |
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return m_priv->GetCondition (); |
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190 |
} |
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191 |
|
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192 |
void |
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SystemCondition::Signal (void) |
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194 |
{ |
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NS_LOG_FUNCTION_NOARGS (); |
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m_priv->Signal (); |
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197 |
} |
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198 |
|
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199 |
void |
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200 |
SystemCondition::Broadcast (void) |
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201 |
{ |
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202 |
NS_LOG_FUNCTION_NOARGS (); |
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m_priv->Broadcast (); |
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204 |
} |
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205 |
|
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206 |
void |
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207 |
SystemCondition::Wait (void) |
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208 |
{ |
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209 |
NS_LOG_FUNCTION_NOARGS (); |
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m_priv->Wait (); |
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211 |
} |
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212 |
|
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213 |
bool |
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214 |
SystemCondition::TimedWait (uint64_t ns) |
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215 |
{ |
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216 |
NS_LOG_FUNCTION_NOARGS (); |
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217 |
return m_priv->TimedWait (ns); |
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218 |
} |
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219 |
|
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220 |
} // namespace ns3 |