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/****************************************************************************
**
** Copyright (C) 2008-2012 NVIDIA Corporation.
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "foundation/windows/Qt3DSWindowsInclude.h"
#include "foundation/Qt3DSFoundation.h"
#include "foundation/Qt3DSThread.h"
#include "foundation/Qt3DSAssert.h"
#include "foundation/Qt3DSBroadcastingAllocator.h"
// an exception for setting the thread name in microsoft debuggers
#define QT3DS_MS_VC_EXCEPTION 0x406D1388
namespace qt3ds {
namespace foundation {
// struct for naming a thread in the debugger
#pragma pack(push, 8)
typedef struct tagTHREADNAME_INFO
{
DWORD dwType; // Must be 0x1000.
LPCSTR szName; // Pointer to name (in user addr space).
DWORD dwThreadID; // Thread ID (-1=caller thread).
DWORD dwFlags; // Reserved for future use, must be zero.
} THREADNAME_INFO;
#pragma pack(pop)
namespace {
DWORD WINAPI NVThreadStart(LPVOID arg)
{
((Thread *)arg)->execute();
return 0;
}
}
class ThreadImpl
{
public:
enum State { NotStarted, Started, Stopped };
ThreadImpl(NVFoundationBase &foundation)
: mFoundation(foundation)
{
}
NVFoundationBase &mFoundation;
HANDLE thread;
LONG quitNow; // Should be 32bit aligned on SMP systems.
State state;
DWORD threadID;
Thread::ExecuteFn fn;
void *arg;
};
Thread::Id Thread::getId() { return static_cast<Id>(GetCurrentThreadId()); }
Thread::Thread(NVFoundationBase &foundation)
{
mImpl = (ThreadImpl *)QT3DS_NEW(foundation.getAllocator(), ThreadImpl)(foundation);
mImpl->thread = NULL;
mImpl->state = ThreadImpl::NotStarted;
mImpl->quitNow = 0;
}
Thread::Thread(NVFoundationBase &foundation, ExecuteFn fn, void *arg)
{
mImpl = (ThreadImpl *)QT3DS_NEW(foundation.getAllocator(), ThreadImpl)(foundation);
mImpl->thread = NULL;
mImpl->state = ThreadImpl::NotStarted;
mImpl->quitNow = 0;
mImpl->fn = fn;
mImpl->arg = arg;
start(0);
}
Thread::~Thread()
{
if (mImpl->state == ThreadImpl::Started)
kill();
CloseHandle(mImpl->thread);
QT3DS_FREE(mImpl->mFoundation.getAllocator(), mImpl);
}
void Thread::start(QT3DSU32 stackSize)
{
if (mImpl->state != ThreadImpl::NotStarted)
return;
mImpl->state = ThreadImpl::Started;
mImpl->thread =
CreateThread(NULL, stackSize, NVThreadStart, (LPVOID)this, 0, &mImpl->threadID);
}
void Thread::signalQuit() { InterlockedIncrement(&(mImpl->quitNow)); }
bool Thread::waitForQuit()
{
if (mImpl->state == ThreadImpl::NotStarted)
return false;
WaitForSingleObject(mImpl->thread, INFINITE);
return true;
}
bool Thread::quitIsSignalled()
{
return InterlockedCompareExchange(&(mImpl->quitNow), 0, 0) != 0;
}
void Thread::quit()
{
mImpl->state = ThreadImpl::Stopped;
ExitThread(0);
}
void Thread::kill()
{
if (mImpl->state == ThreadImpl::Started)
TerminateThread(mImpl->thread, 0);
mImpl->state = ThreadImpl::Stopped;
}
void Thread::sleep(QT3DSU32 ms) { Sleep(ms); }
void Thread::yield() { SwitchToThread(); }
void Thread::execute(void) { (*mImpl->fn)(mImpl->arg); }
QT3DSU32 Thread::setAffinityMask(QT3DSU32 mask)
{
return mask ? (QT3DSU32)SetThreadAffinityMask(mImpl->thread, mask) : 0;
}
void Thread::setName(const char *name)
{
THREADNAME_INFO info;
info.dwType = 0x1000;
info.szName = name;
info.dwThreadID = mImpl->threadID;
info.dwFlags = 0;
#ifdef QT3DS_VC
// C++ Exceptions are disabled for this project, but SEH is not (and cannot be)
// http://stackoverflow.com/questions/943087/what-exactly-will-happen-if-i-disable-c-exceptions-in-a-project
__try {
RaiseException(QT3DS_MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(ULONG_PTR),
(ULONG_PTR *)&info);
} __except (EXCEPTION_EXECUTE_HANDLER) {
// this runs if not attached to a debugger (thus not really naming the thread)
}
#else
RaiseException(QT3DS_MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(ULONG_PTR),
(ULONG_PTR *)&info);
#endif
}
void Thread::setPriority(ThreadPriority::Enum prio)
{
switch (prio) {
case ThreadPriority::eHIGH:
SetThreadPriority(mImpl->thread, THREAD_PRIORITY_HIGHEST);
break;
case ThreadPriority::eABOVE_NORMAL:
SetThreadPriority(mImpl->thread, THREAD_PRIORITY_ABOVE_NORMAL);
break;
case ThreadPriority::eNORMAL:
SetThreadPriority(mImpl->thread, THREAD_PRIORITY_NORMAL);
break;
case ThreadPriority::eBELOW_NORMAL:
SetThreadPriority(mImpl->thread, THREAD_PRIORITY_BELOW_NORMAL);
break;
case ThreadPriority::eLOW:
SetThreadPriority(mImpl->thread, THREAD_PRIORITY_LOWEST);
break;
default:
break;
}
}
ThreadPriority::Enum Thread::getPriority(Id threadId)
{
ThreadPriority::Enum retval = ThreadPriority::eLOW;
int priority = GetThreadPriority((HANDLE)threadId);
StaticAssert<(THREAD_PRIORITY_HIGHEST > THREAD_PRIORITY_ABOVE_NORMAL)>::valid_expression();
if (priority >= THREAD_PRIORITY_HIGHEST)
retval = ThreadPriority::eHIGH;
else if (priority >= THREAD_PRIORITY_ABOVE_NORMAL)
retval = ThreadPriority::eABOVE_NORMAL;
else if (priority >= THREAD_PRIORITY_NORMAL)
retval = ThreadPriority::eNORMAL;
else if (priority >= THREAD_PRIORITY_BELOW_NORMAL)
retval = ThreadPriority::eBELOW_NORMAL;
return retval;
}
QT3DSU32 TlsAlloc()
{
DWORD rv = ::TlsAlloc();
QT3DS_ASSERT(rv != TLS_OUT_OF_INDEXES);
return (QT3DSU32)rv;
}
void TlsFree(QT3DSU32 index) { ::TlsFree(index); }
void *TlsGet(QT3DSU32 index) { return ::TlsGetValue(index); }
QT3DSU32 TlsSet(QT3DSU32 index, void *value) { return ::TlsSetValue(index, value); }
const QT3DSU32 Thread::DEFAULT_STACK_SIZE = 1048576;
} // namespace foundation
} // namespace qt3ds
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