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|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2010 InspIRCd Development Team
* See: http://wiki.inspircd.org/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#ifndef __THREADENGINE_PTHREAD__
#define __THREADENGINE_PTHREAD__
#include <pthread.h>
class ThreadSignalSocket;
/** The Mutex class represents a mutex, which can be used to keep threads
* properly synchronised. Use mutexes sparingly, as they are a good source
* of thread deadlocks etc, and should be avoided except where absolutely
* neccessary. Note that the internal behaviour of the mutex varies from OS
* to OS depending on the thread engine, for example in windows a Mutex
* in InspIRCd uses critical sections, as they are faster and simpler to
* manage.
*/
class CoreExport Mutex
{
private:
pthread_mutex_t mutex;
friend class pthread_cond_var;
public:
Mutex()
{
pthread_mutex_init(&mutex, NULL);
}
void lock()
{
pthread_mutex_lock(&mutex);
}
void unlock()
{
pthread_mutex_unlock(&mutex);
}
~Mutex()
{
pthread_mutex_destroy(&mutex);
}
/** RAII locking object for proper unlock on exceptions */
class Lock
{
public:
Mutex& mutex;
Lock(Mutex& m) : mutex(m)
{
mutex.lock();
}
~Lock()
{
mutex.unlock();
}
};
};
/** Only available in pthreads model */
class CoreExport pthread_cond_var
{
public:
pthread_cond_t pcond;
pthread_cond_var()
{
pthread_cond_init(&pcond, NULL);
}
~pthread_cond_var()
{
pthread_cond_destroy(&pcond);
}
void wait(Mutex& mutex)
{
pthread_cond_wait(&pcond, &mutex.mutex);
}
void signal_one()
{
pthread_cond_signal(&pcond);
}
};
class CoreExport ThreadEngine
{
public:
ThreadEngine();
~ThreadEngine();
void Submit(Job*);
/** Wait for all jobs that rely on this module */
void BlockForUnload(Module* going);
private:
class Runner : public classbase
{
public:
pthread_t id;
ThreadEngine* const te;
Job* current;
static void* entry_point(void* parameter);
void main_loop();
Runner(ThreadEngine* t);
~Runner();
};
void result_loop();
Mutex job_lock;
std::list<Job*> submit_q;
pthread_cond_var submit_s;
std::vector<Runner*> threads;
std::list<Job*> result_q;
pthread_cond_var result_sc;
ThreadSignalSocket* result_ss;
friend class ThreadSignalSocket;
};
#endif
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