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/*
Cross-platform thread handling
Copyright (C) 2005 Andrew Zabolotny
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "Mthread.h"
#if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE_CC__)
# define MANGOS_PTHREAD_MUTEX_RECURSIVE PTHREAD_MUTEX_RECURSIVE
#else
# define MANGOS_PTHREAD_MUTEX_RECURSIVE PTHREAD_MUTEX_RECURSIVE_NP
#endif
#if PLATFORM != PLATFORM_WINDOWS
MThread::MThread ()
{
tid = 0;
}
MThread::~MThread ()
{
/* Kill thread if this is not the current thread */
if (tid && (pthread_self () != tid))
{
pthread_cancel (tid);
pthread_join (tid, NULL);
}
}
static void *thread_start_routine (void *arg)
{
MThread *newthr = (MThread *)arg;
pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
newthr->routine (newthr->arg);
return NULL;
}
MThread *MThread::Start (void (*routine) (void *arg), void *arg)
{
MThread *newthr = new MThread ();
newthr->routine = routine;
newthr->arg = arg;
int rc = pthread_create (&newthr->tid, NULL, thread_start_routine, newthr);
if (rc)
{
newthr->DecRef ();
return NULL;
}
return newthr;
}
pthread_mutexattr_t MMutex::attr;
int MMutex::attr_refcount = 0;
MMutex::MMutex ()
{
if (!attr_refcount++)
{
pthread_mutexattr_init (&attr);
pthread_mutexattr_settype (&attr, MANGOS_PTHREAD_MUTEX_RECURSIVE);
}
pthread_mutex_init (&mutex, &attr);
}
MMutex::~MMutex ()
{
pthread_mutex_destroy (&mutex);
if (!--attr_refcount)
pthread_mutexattr_destroy (&attr);
}
bool MMutex::Lock ()
{
return (pthread_mutex_lock (&mutex) == 0);
}
bool MMutex::TryLock ()
{
return (pthread_mutex_trylock (&mutex) == 0);
}
void MMutex::Unlock ()
{
pthread_mutex_unlock (&mutex);
}
MMutex *MMutex::Create ()
{
return new MMutex ();
}
#else //windows
MThread::MThread()
{
th = NULL;
}
MThread::~MThread ()
{
/* Kill thread if this is not current thread */
if (th && (GetCurrentThreadId () != id))
{
TerminateThread (th, 0);
WaitForSingleObject (th, INFINITE);
CloseHandle (th);
}
}
bool MThread::SetPriority (ThreadPriority prio)
{
int p;
switch (prio)
{
case IDLE: p = THREAD_PRIORITY_IDLE; break;
case LOWER: p = THREAD_PRIORITY_LOWEST; break;
case LOW: p = THREAD_PRIORITY_BELOW_NORMAL; break;
case NORMAL: p = THREAD_PRIORITY_NORMAL; break;
case HIGH: p = THREAD_PRIORITY_ABOVE_NORMAL; break;
case HIGHER: p = THREAD_PRIORITY_HIGHEST; break;
case REALTIME: p = THREAD_PRIORITY_TIME_CRITICAL; break;
default: p = THREAD_PRIORITY_NORMAL; break;
}
return SetThreadPriority (th, p);
}
static DWORD WINAPI thread_start_routine (void *arg)
//static void thread_start_routine (void *arg)
{
MThread *newthr = (MThread *)arg;
newthr->id = GetCurrentThreadId ();
newthr->routine (newthr->arg);
return 0;
}
MThread *MThread::Start (void (*routine) (void *arg), void *arg)
{
DWORD dwtid;
MThread *newthr = new MThread ();
newthr->routine = routine;
newthr->arg = arg;
newthr->th = CreateThread (NULL, WIN32_THREAD_STACK_SIZE, thread_start_routine, newthr, 0, &dwtid);
//newthr->th = (HANDLE)_beginthread(thread_start_routine, 0, newthr);
if (!newthr->th)
{
newthr->DecRef ();
return NULL;
}
return newthr;
}
MMutex::MMutex ()
{
sem = CreateMutex (NULL, FALSE, NULL);
}
MMutex::~MMutex ()
{
CloseHandle (sem);
}
bool MMutex::Lock ()
{
return (WaitForSingleObject (sem, INFINITE) != WAIT_FAILED);
}
bool MMutex::TryLock ()
{
DWORD state = WaitForSingleObject (sem, 0);
return (state == WAIT_OBJECT_0) && (state != WAIT_ABANDONED);
}
void MMutex::Unlock ()
{
ReleaseMutex (sem);
}
MMutex *MMutex::Create ()
{
MMutex *mutex = new MMutex ();
if (!mutex->sem)
{
mutex->DecRef ();
return NULL;
}
return mutex;
}
#endif
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