spexecutor.cpp
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/*
* Copyright 2007 Stephen Liu
* For license terms, see the file COPYING along with this library.
*/
#include <sys/types.h>
#include <assert.h>
#include "spporting.hpp"
#include "spexecutor.hpp"
#include "spthreadpool.hpp"
#include "sputils.hpp"
SP_Task :: ~SP_Task()
{
}
//===================================================================
SP_SimpleTask :: SP_SimpleTask( ThreadFunc_t func, void * arg, int deleteAfterRun )
{
mFunc = func;
mArg = arg;
mDeleteAfterRun = deleteAfterRun;
}
SP_SimpleTask :: ~SP_SimpleTask()
{
}
void SP_SimpleTask :: run()
{
mFunc( mArg );
if( mDeleteAfterRun ) delete this;
}
//===================================================================
SP_Executor :: SP_Executor( int maxThreads, const char * tag )
{
tag = NULL == tag ? "unknown" : tag;
mThreadPool = new SP_ThreadPool( maxThreads, tag );
mQueue = new SP_BlockingQueue();
mIsShutdown = 0;
sp_thread_mutex_init( &mMutex, NULL );
sp_thread_cond_init( &mCond, NULL );
sp_thread_attr_t attr;
sp_thread_attr_init( &attr );
assert( sp_thread_attr_setstacksize( &attr, 1024 * 1024 ) == 0 );
sp_thread_attr_setdetachstate( &attr, SP_THREAD_CREATE_DETACHED );
sp_thread_t thread;
int ret = sp_thread_create( &thread, &attr, eventLoop, this );
sp_thread_attr_destroy( &attr );
if( 0 == ret ) {
sp_syslog( LOG_NOTICE, "[ex@%s] Thread #%ld has been created for executor", tag, thread );
} else {
sp_syslog( LOG_WARNING, "[ex@%s] Unable to create a thread for executor", tag );
}
}
SP_Executor :: ~SP_Executor()
{
shutdown();
while( 2 != mIsShutdown ) {
sp_thread_mutex_lock( &mMutex );
sp_thread_cond_wait( &mCond, &mMutex );
sp_thread_mutex_unlock( &mMutex );
}
sp_thread_mutex_destroy( &mMutex );
sp_thread_cond_destroy( &mCond);
delete mThreadPool;
mThreadPool = NULL;
delete mQueue;
mQueue = NULL;
}
void SP_Executor :: shutdown()
{
sp_thread_mutex_lock( &mMutex );
if( 0 == mIsShutdown ) {
mIsShutdown = 1;
// signal the event loop to wake up
execute( worker, NULL );
}
sp_thread_mutex_unlock( &mMutex );
}
sp_thread_result_t SP_THREAD_CALL SP_Executor :: eventLoop( void * arg )
{
SP_Executor * executor = ( SP_Executor * )arg;
while( 0 == executor->mIsShutdown ) {
void * queueData = executor->mQueue->pop();
if( executor->mThreadPool->getMaxThreads() > 1 ) {
if( 0 != executor->mThreadPool->dispatch( worker, queueData ) ) {
worker( queueData );
}
} else {
worker( queueData );
}
}
sp_thread_mutex_lock( &executor->mMutex );
executor->mIsShutdown = 2;
sp_thread_cond_signal( &executor->mCond );
sp_thread_mutex_unlock( &executor->mMutex );
return 0;
}
void SP_Executor :: worker( void * arg )
{
if( NULL != arg ) {
SP_Task * task = ( SP_Task * )arg;
task->run();
}
}
void SP_Executor :: execute( SP_Task * task )
{
mQueue->push( task );
}
void SP_Executor :: execute( void ( * func ) ( void * ), void * arg )
{
SP_SimpleTask * task = new SP_SimpleTask( func, arg, 1 );
execute( task );
}
int SP_Executor :: getQueueLength()
{
return mQueue->getLength();
}