/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/



#ifndef _THREAD_HXX_
#define _THREAD_HXX_

#ifdef __cplusplus

#include <osl/time.h>


#include <osl/diagnose.h>
#include <osl/thread.h>
#include <rtl/alloc.h>

namespace osl
{
/** threadFunc is the function which is executed by the threads
    created by the osl::Thread class. The function's signature 
    matches the one of oslWorkerFunction which is declared in 
    osl/thread.h .
*/
extern "C" inline void SAL_CALL threadFunc( void* param);

class Thread
{
    Thread( const Thread& );
    Thread& operator= ( const Thread& );
public:
	// these are here to force memory de/allocation to sal lib.
	inline static void * SAL_CALL operator new( size_t nSize ) SAL_THROW (())
		{ return ::rtl_allocateMemory( nSize ); }
	inline static void SAL_CALL operator delete( void * pMem ) SAL_THROW (())
		{ ::rtl_freeMemory( pMem ); }
	inline static void * SAL_CALL operator new( size_t, void * pMem ) SAL_THROW (())
		{ return pMem; }
	inline static void SAL_CALL operator delete( void *, void * ) SAL_THROW (())
		{}

    Thread(): m_hThread(0){}

    virtual  ~Thread()
    {
        osl_destroyThread( m_hThread);
    }

    sal_Bool SAL_CALL create() 
    {
	    OSL_ASSERT(m_hThread == 0);	// only one running thread per instance
       	if (m_hThread)
			return sal_False;

	    m_hThread = osl_createSuspendedThread( threadFunc, (void*)this);
	    if ( m_hThread )
		    osl_resumeThread(m_hThread);							             

	    return m_hThread != 0;
    }

    sal_Bool SAL_CALL createSuspended() 
    {
	    OSL_ASSERT(m_hThread == 0);	// only one running thread per instance
        if( m_hThread)
            return sal_False;
	    m_hThread= osl_createSuspendedThread( threadFunc, 
										     (void*)this);
	    return m_hThread != 0;
    }

    virtual void SAL_CALL suspend() 
    {
        if( m_hThread )
            osl_suspendThread(m_hThread);
    }

    virtual void SAL_CALL resume() 
    {
        if( m_hThread )
            osl_resumeThread(m_hThread);
    }

    virtual void SAL_CALL terminate() 
    {
        if( m_hThread )
            osl_terminateThread(m_hThread);
    }

    virtual void SAL_CALL join() 
    {
        osl_joinWithThread(m_hThread);
    }

    sal_Bool SAL_CALL isRunning() const
    {
	    return osl_isThreadRunning(m_hThread);
    }

    void SAL_CALL setPriority( oslThreadPriority Priority)
    {
        if( m_hThread )
            osl_setThreadPriority(m_hThread, Priority);
    }

    oslThreadPriority SAL_CALL getPriority() const
    {
	    return m_hThread ? osl_getThreadPriority(m_hThread) : osl_Thread_PriorityUnknown;
    }

    oslThreadIdentifier SAL_CALL getIdentifier() const
    {
	    return osl_getThreadIdentifier(m_hThread);
    }

    static oslThreadIdentifier SAL_CALL getCurrentIdentifier()
    {
	    return osl_getThreadIdentifier(0);
    }

    static void SAL_CALL wait(const TimeValue& Delay) 
    {
	    osl_waitThread(&Delay);
    }

    static void SAL_CALL yield() 
    { 
	    osl_yieldThread();
    }

    static inline void setName(char const * name) throw () {
        osl_setThreadName(name);
    }

    virtual sal_Bool SAL_CALL schedule() 
    {
	    return m_hThread ? osl_scheduleThread(m_hThread) : sal_False;
    }
    
    SAL_CALL operator oslThread() const
    {
        return m_hThread;
    }

protected:

    /** The thread functions calls the protected functions
        run and onTerminated.
    */
    friend void SAL_CALL threadFunc( void* param);

    virtual void SAL_CALL run() = 0;

    virtual void SAL_CALL onTerminated() 
    {
    }

private:
    oslThread m_hThread;
};

extern "C" inline void SAL_CALL threadFunc( void* param)
{
        Thread* pObj= (Thread*)param;
        pObj->run();
	    pObj->onTerminated();		
}

class ThreadData 
{
    ThreadData( const ThreadData& );
    ThreadData& operator= (const ThreadData& );
public:
 	/// Create a thread specific local data key 
    ThreadData( oslThreadKeyCallbackFunction pCallback= 0 )
    {
        m_hKey = osl_createThreadKey( pCallback );
    }

	/// Destroy a thread specific local data key 
	~ThreadData()
    {
       	osl_destroyThreadKey(m_hKey);
    }

	/** Set the data associated with the data key.
		@returns True if operation was successfull
	*/
	sal_Bool SAL_CALL setData(void *pData)
    {
       	return (osl_setThreadKeyData(m_hKey, pData));
    }

	/** Get the data associated with the data key.
		@returns The data asscoitaed with the data key or 
		NULL if no data was set
	*/
	void* SAL_CALL getData()
    {
       	return osl_getThreadKeyData(m_hKey);
    }

    operator oslThreadKey() const
    {
        return m_hKey;
    }

private:
	oslThreadKey m_hKey;
};

} // end namespace osl
#endif
#endif