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/*
Copyright (C) 2001 Stefan Westerfeld
stefan@space.twc.de
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; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include "thread.h"
#include <string.h>
using namespace Arts;
// Thread:
Thread::~Thread()
{
delete impl;
}
Thread_impl::~Thread_impl()
{
}
// Mutex:
Mutex::~Mutex()
{
delete impl;
}
Mutex_impl::~Mutex_impl()
{
}
// ThreadCondition:
ThreadCondition::~ThreadCondition()
{
delete impl;
}
ThreadCondition_impl::~ThreadCondition_impl()
{
}
// Semaphore
Semaphore::~Semaphore()
{
delete impl;
}
Semaphore_impl::~Semaphore_impl()
{
}
// No threading:
namespace Arts {
class SystemThreadsNoMutex_impl : public Mutex_impl {
public:
void lock() {};
bool tryLock() { return true; };
void unlock() {};
};
static Thread *systemThreadsNoneCurrent = 0;
class SystemThreadsNoThread_impl : public Thread_impl {
private:
Thread *thread;
public:
SystemThreadsNoThread_impl(Thread *thread) : thread(thread) {}
void setPriority(int) {}
void start() {
Thread *oldCurrent = systemThreadsNoneCurrent;
systemThreadsNoneCurrent = thread;
thread->run();
systemThreadsNoneCurrent = oldCurrent;
}
void waitDone() {}
};
class SystemThreadsNoThreadCondition_impl : public ThreadCondition_impl {
public:
void wakeOne() {};
void wakeAll() {};
void wait(Mutex_impl *) {};
};
class SystemThreadsNoSemaphore_impl : public Semaphore_impl {
public:
void wait() {}
int tryWait() { return 0; }
void post() {}
int getValue() { return 0; }
};
class SystemThreadsNone : public SystemThreads {
public:
bool isMainThread() {
return (systemThreadsNoneCurrent == 0);
}
Mutex_impl *createMutex_impl() {
return new SystemThreadsNoMutex_impl();
}
Mutex_impl *createRecMutex_impl() {
return new SystemThreadsNoMutex_impl();
}
Thread_impl *createThread_impl(Thread *thread) {
return new SystemThreadsNoThread_impl(thread);
}
ThreadCondition_impl *createThreadCondition_impl() {
return new SystemThreadsNoThreadCondition_impl();
}
Thread *getCurrentThread() {
return systemThreadsNoneCurrent;
}
Semaphore_impl *createSemaphore_impl(int, int) {
return new SystemThreadsNoSemaphore_impl();
}
};
}
static SystemThreadsNone systemThreadsNone;
static SystemThreads *SystemThreads_the = 0;
SystemThreads *SystemThreads::the()
{
if(!SystemThreads_the) return &systemThreadsNone;
return SystemThreads_the;
}
bool SystemThreads::init(SystemThreads *the)
{
if(SystemThreads_the)
return false;
else
{
SystemThreads_the = the;
return true;
}
}
bool SystemThreads::supported()
{
return (SystemThreads_the != 0);
}
SystemThreads::~SystemThreads()
{
}
namespace Arts { void ARTS_EXPORT *gslGlobalMutexTable = 0; }
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