jack2/windows/JackWinThread.cpp

/*
Copyright (C) 2001 Paul Davis
Copyright (C) 2004-2006 Grame

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program 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 General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif

#include "JackWinThread.h"
#include "JackError.h"
#include "JackTime.h"
#include <assert.h>

namespace Jack
{

DWORD WINAPI JackWinThread::ThreadHandler(void* arg)
{
    JackWinThread* obj = (JackWinThread*)arg;
    JackRunnableInterface* runnable = obj->fRunnable;

    set_threaded_log_function(); 
    
    // Signal creation thread when started with StartSync
    jack_log("ThreadHandler: start");
    obj->fStatus = kIniting;
    
    // Call Init method
    if (!runnable->Init()) {
        jack_error("Thread init fails: thread quits");
        return 0;
    }
    
    obj->fStatus = kRunning;
    
    // If Init succeed, start the thread loop
    bool res = true;
    while (obj->fStatus == kRunning && res) {
        res = runnable->Execute();
    }

    SetEvent(obj->fEvent);
    jack_log("ThreadHandler: exit");
    return 0;
}

JackWinThread::JackWinThread(JackRunnableInterface* runnable)
        : JackThread(runnable, 0, false, 0)
{
    fEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
    fThread = NULL;
    assert(fEvent);
}

JackWinThread::~JackWinThread()
{
    CloseHandle(fEvent);
    CloseHandle(fThread);
}

int JackWinThread::Start()
{
    fStatus = kStarting;

    // Check if the thread was correctly started
    if (StartImp(&fThread, fPriority, fRealTime, ThreadHandler, this) < 0) {
        fStatus = kIdle;
        return -1;
    } else {
        return 0;
    }
}
    
int JackWinThread::StartSync()
{
    fStatus = kStarting;
    
    if (StartImp(&fThread, fPriority, fRealTime, ThreadHandler, this) < 0) {
        fStatus = kIdle;
        return -1;
    } else {
        int count = 0;
        while (fStatus == kStarting && ++count < 1000) {
            JackSleep(1000);
        }
        return (count == 1000) ? -1 : 0;
    }
}

int JackWinThread::StartImp(pthread_t* thread, int priority, int realtime, ThreadCallback start_routine, void* arg)
{
    DWORD id;
    *thread = CreateThread(NULL, 0, start_routine, arg, 0, &id);

    if (*thread == NULL) {
        jack_error("Cannot create thread error = %d", GetLastError());
        return -1;
    }

    if (realtime) {
        
        jack_log("Create RT thread");
        if (!SetThreadPriority(*thread, THREAD_PRIORITY_TIME_CRITICAL)) {
            jack_error("Cannot set priority class = %d", GetLastError());
            return -1;
        }

    } else {
        jack_log("Create non RT thread");
    }
    
    return 0;
}

// voir http://www.microsoft.com/belux/msdn/nl/community/columns/ldoc/multithread1.mspx

int JackWinThread::Kill()
{
    if (fThread) { // If thread has been started
        TerminateThread(fThread, 0);
        WaitForSingleObject(fThread, INFINITE);
        CloseHandle(fThread);
        jack_log("JackWinThread::Kill");
        fThread = NULL;
        fStatus = kIdle;
        return 0;
    } else {
        return -1;
    }
}

int JackWinThread::Stop()
{
    if (fThread) { // If thread has been started
        jack_log("JackWinThread::Stop");
        fStatus = kIdle; // Request for the thread to stop
        WaitForSingleObject(fEvent, INFINITE);
        CloseHandle(fThread);
        fThread = NULL;
        return 0;
    } else {
        return -1;
    }
}

int JackWinThread::AcquireRealTime()
{
    return (fThread) ? AcquireRealTimeImp(fThread, fPriority) : -1;
}

int JackWinThread::AcquireRealTime(int priority)
{
    fPriority = priority;
    return AcquireRealTime();
}

int JackWinThread::AcquireRealTimeImp(pthread_t thread, int priority)
{
    jack_log("JackWinThread::AcquireRealTime");

    if (SetThreadPriority(thread, THREAD_PRIORITY_TIME_CRITICAL)) {
        fRealTime = true;
        return 0;
    } else {
        jack_error("Cannot set thread priority = %d", GetLastError());
        return -1;
    }
}
int JackWinThread::DropRealTime()
{
    return DropRealTimeImp(fThread);
}

int JackWinThread::DropRealTimeImp(pthread_t thread)
{
    if (SetThreadPriority(thread, THREAD_PRIORITY_NORMAL)) {
        fRealTime = false;
        return 0;
    } else {
        jack_error("Cannot set thread priority = %d", GetLastError());
        return -1;
    }
}

pthread_t JackWinThread::GetThreadID()
{
    return fThread;
}

void JackWinThread::Terminate()
{
    ExitThread(0);
}

} // end of namespace

bool jack_tls_allocate_key(jack_tls_key *key_ptr)
{
    DWORD key;
    
    key = TlsAlloc();
    if (key == TLS_OUT_OF_INDEXES)
    {
        jack_error("TlsAlloc() failed. Error is %d", (unsigned int)GetLastError());
        return false;
    }
    
    *key_ptr = key;
    return true;
}

bool jack_tls_free_key(jack_tls_key key)
{
    if (!TlsFree(key))
    {
        jack_error("TlsFree() failed. Error is %d", (unsigned int)GetLastError());
        return false;
    }
    
    return true;
}

bool jack_tls_set(jack_tls_key key, void *data_ptr)
{
    if (!TlsSetValue(key, data_ptr))
    {
        jack_error("TlsSetValue() failed. Error is %d", (unsigned int)GetLastError());
        return false;
    }
    
    return true;
}

void *jack_tls_get(jack_tls_key key)
{
    return TlsGetValue(key);
}