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/*
* Copyright (c) 2005, Eric Crahen
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is furnished
* to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
#ifndef __ZTTHREADOPS_H__
#define __ZTTHREADOPS_H__
#include "zthread/Priority.h"
#include <assert.h>
#include <CoreServices/CoreServices.h>
//#include <Multiprocessing.h>
//#include <MultiprocessingInfo.h>
namespace ZThread {
class Runnable;
/**
* @class ThreadOps
* @author Eric Crahen <http://www.code-foo.com>
* @date <2003-07-16T23:26:01-0400>
* @version 2.2.0
*
* This class is an abstraction used to perform various operations on a
* native POSIX thread.
*/
class ThreadOps {
//! Keep track of the pthreads handle for the native thread
MPQueueID _queue;
MPTaskID _tid;
ThreadOps(MPTaskID tid) : _queue(0), _tid(tid) { }
static OSStatus _dispatch(void*);
public:
const static ThreadOps INVALID;
/**
* Create a new ThreadOps to manipulate a native thread.
*/
ThreadOps();
ThreadOps(const ThreadOps& ops) : _queue(0), _tid(ops._tid) {}
~ThreadOps() throw();
inline bool operator==(const ThreadOps& ops) const {
return ops._tid == _tid;
}
const ThreadOps& operator=(const ThreadOps& ops) {
assert(_queue == 0);
_tid = ops._tid;
return *this;
}
static ThreadOps self() {
return ThreadOps(MPCurrentTaskID());
}
/**
* Activating an instance of ThreadOps will map it onto the currently
* executing thread.
*/
static void activate(ThreadOps* ops) {
assert(ops);
assert(ops->_tid == 0);
ops->_tid = MPCurrentTaskID();
}
/**
* Test if this object represents the currently executing
* native thread.
*
* @return bool true if successful
*/
static bool isCurrent(ThreadOps* ops) {
assert(ops);
return MPCurrentTaskID() == ops->_tid;
}
/**
* Join a native thread.
*
* @return bool true if successful
*/
static bool join(ThreadOps*);
/**
* Force the current native thread to yield, letting the scheduler
* give the CPU time to another thread.
*
* @return bool true if successful, false if the operation can't
* be supported.
*/
static bool yield();
/**
* Set the priority for the native thread if supported by the
* system.
*
* @param PRIORITY requested priority
* @return bool false if unsuccessful
*/
static bool setPriority(ThreadOps*, Priority);
/**
* Set the priority for the native thread if supported by the
* system.
*
* @param Thread::PRIORITY& current priority
* @return bool false if unsuccessful
*/
static bool getPriority(ThreadOps*, Priority&);
protected:
/**
* Spawn a native thread.
*
* @param ThreadImpl* parent thread
* @param ThreadImpl* child thread being started.
* @param Runnable* task being executed.
*
* @return bool true if successful
*/
bool spawn(Runnable*);
};
}
#endif // __ZTTHREADOPS_H__
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