amxmodx/modules/sqlite/thread/PosixThreads.cpp
2015-03-13 15:18:47 +02:00

273 lines
5.3 KiB
C++

// vim: set ts=4 sw=4 tw=99 noet:
//
// AMX Mod X, based on AMX Mod by Aleksander Naszko ("OLO").
// Copyright (C) The AMX Mod X Development Team.
//
// This software is licensed under the GNU General Public License, version 3 or higher.
// Additional exceptions apply. For full license details, see LICENSE.txt or visit:
// https://alliedmods.net/amxmodx-license
#include <unistd.h>
#include "PosixThreads.h"
void PosixThreader::ThreadSleep(unsigned int ms)
{
usleep( ms * 1000 );
}
void PosixThreader::GetPriorityBounds(ThreadPriority &max, ThreadPriority &min)
{
max = ThreadPrio_Normal;
min = ThreadPrio_Normal;
}
IMutex *PosixThreader::MakeMutex()
{
pthread_mutex_t mutex;
if (pthread_mutex_init(&mutex, NULL) != 0)
return NULL;
PosixMutex *pMutex = new PosixMutex(mutex);
return pMutex;
}
void PosixThreader::MakeThread(IThread *pThread)
{
ThreadParams defparams;
defparams.flags = Thread_AutoRelease;
defparams.prio = ThreadPrio_Normal;
MakeThread(pThread, &defparams);
}
IThreadHandle *PosixThreader::MakeThread(IThread *pThread, ThreadFlags flags)
{
ThreadParams defparams;
defparams.flags = flags;
defparams.prio = ThreadPrio_Normal;
return MakeThread(pThread, &defparams);
}
void *Posix_ThreadGate(void *param)
{
PosixThreader::ThreadHandle *pHandle =
reinterpret_cast<PosixThreader::ThreadHandle *>(param);
//Block this thread from being started initially.
pthread_mutex_lock(&pHandle->m_runlock);
//if we get here, we've obtained the lock and are allowed to run.
//unlock and continue.
pthread_mutex_unlock(&pHandle->m_runlock);
pHandle->m_run->RunThread(pHandle);
ThreadParams params;
pthread_mutex_lock(&pHandle->m_statelock);
pHandle->m_state = Thread_Done;
pHandle->GetParams(&params);
pthread_mutex_unlock(&pHandle->m_statelock);
pHandle->m_run->OnTerminate(pHandle, false);
if (params.flags & Thread_AutoRelease)
delete pHandle;
return 0;
}
ThreadParams g_defparams;
IThreadHandle *PosixThreader::MakeThread(IThread *pThread, const ThreadParams *params)
{
if (params == NULL)
params = &g_defparams;
PosixThreader::ThreadHandle *pHandle =
new PosixThreader::ThreadHandle(this, pThread, params);
pthread_mutex_lock(&pHandle->m_runlock);
int err;
err = pthread_create(&pHandle->m_thread, NULL, Posix_ThreadGate, (void *)pHandle);
if (err != 0)
{
pthread_mutex_unlock(&pHandle->m_runlock);
delete pHandle;
return NULL;
}
//Don't bother setting priority...
if (!(pHandle->m_params.flags & Thread_CreateSuspended))
{
pHandle->m_state = Thread_Running;
err = pthread_mutex_unlock(&pHandle->m_runlock);
if (err != 0)
pHandle->m_state = Thread_Paused;
}
return pHandle;
}
IEventSignal *PosixThreader::MakeEventSignal()
{
return new PosixEventSignal();
}
/*****************
**** Mutexes ****
*****************/
PosixThreader::PosixMutex::~PosixMutex()
{
pthread_mutex_destroy(&m_mutex);
}
bool PosixThreader::PosixMutex::TryLock()
{
int err = pthread_mutex_trylock(&m_mutex);
return (err == 0);
}
void PosixThreader::PosixMutex::Lock()
{
pthread_mutex_lock(&m_mutex);
}
void PosixThreader::PosixMutex::Unlock()
{
pthread_mutex_unlock(&m_mutex);
}
void PosixThreader::PosixMutex::DestroyThis()
{
delete this;
}
/******************
* Thread Handles *
******************/
PosixThreader::ThreadHandle::ThreadHandle(IThreader *parent, IThread *run, const ThreadParams *params) :
m_parent(parent), m_params(*params), m_run(run), m_state(Thread_Paused)
{
pthread_mutex_init(&m_runlock, NULL);
pthread_mutex_init(&m_statelock, NULL);
}
PosixThreader::ThreadHandle::~ThreadHandle()
{
pthread_mutex_destroy(&m_runlock);
pthread_mutex_destroy(&m_statelock);
}
bool PosixThreader::ThreadHandle::WaitForThread()
{
void *arg;
if (pthread_join(m_thread, &arg) != 0)
return false;
return true;
}
ThreadState PosixThreader::ThreadHandle::GetState()
{
ThreadState state;
pthread_mutex_lock(&m_statelock);
state = m_state;
pthread_mutex_unlock(&m_statelock);
return state;
}
IThreadCreator *PosixThreader::ThreadHandle::Parent()
{
return m_parent;
}
void PosixThreader::ThreadHandle::DestroyThis()
{
if (m_params.flags & Thread_AutoRelease)
return;
delete this;
}
void PosixThreader::ThreadHandle::GetParams(ThreadParams *ptparams)
{
if (!ptparams)
return;
*ptparams = m_params;
}
ThreadPriority PosixThreader::ThreadHandle::GetPriority()
{
return ThreadPrio_Normal;
}
bool PosixThreader::ThreadHandle::SetPriority(ThreadPriority prio)
{
return (prio == ThreadPrio_Normal);
}
bool PosixThreader::ThreadHandle::Unpause()
{
if (m_state != Thread_Paused)
return false;
m_state = Thread_Running;
if (pthread_mutex_unlock(&m_runlock) != 0)
{
m_state = Thread_Paused;
return false;
}
return true;
}
/*****************
* EVENT SIGNALS *
*****************/
PosixThreader::PosixEventSignal::PosixEventSignal()
{
pthread_cond_init(&m_cond, NULL);
pthread_mutex_init(&m_mutex, NULL);
}
PosixThreader::PosixEventSignal::~PosixEventSignal()
{
pthread_cond_destroy(&m_cond);
pthread_mutex_destroy(&m_mutex);
}
void PosixThreader::PosixEventSignal::Wait()
{
pthread_mutex_lock(&m_mutex);
pthread_cond_wait(&m_cond, &m_mutex);
pthread_mutex_unlock(&m_mutex);
}
void PosixThreader::PosixEventSignal::Signal()
{
pthread_mutex_lock(&m_mutex);
pthread_cond_broadcast(&m_cond);
pthread_mutex_unlock(&m_mutex);
}
void PosixThreader::PosixEventSignal::DestroyThis()
{
delete this;
}