amxmodx/dlls/sqlite/thread/WinThreads.cpp

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// vim: set ts=4 sw=4 tw=99 noet:
//
// AMX Mod X, based on AMX Mod by Aleksander Naszko ("OLO").
// Copyright (C) The AMX Mod X Development Team.
//
// This software is licensed under the GNU General Public License, version 3 or higher.
// Additional exceptions apply. For full license details, see LICENSE.txt or visit:
// https://alliedmods.net/amxmodx-license
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#include "WinThreads.h"
void WinThreader::ThreadSleep(unsigned int ms)
{
Sleep((DWORD)ms);
}
IMutex *WinThreader::MakeMutex()
{
HANDLE mutex = CreateMutexA(NULL, FALSE, NULL);
if (mutex == NULL)
return NULL;
WinMutex *pMutex = new WinMutex(mutex);
return pMutex;
}
IThreadHandle *WinThreader::MakeThread(IThread *pThread, ThreadFlags flags)
{
ThreadParams defparams;
defparams.flags = flags;
defparams.prio = ThreadPrio_Normal;
return MakeThread(pThread, &defparams);
}
void WinThreader::MakeThread(IThread *pThread)
{
ThreadParams defparams;
defparams.flags = Thread_AutoRelease;
defparams.prio = ThreadPrio_Normal;
MakeThread(pThread, &defparams);
}
DWORD WINAPI Win32_ThreadGate(LPVOID param)
{
WinThreader::ThreadHandle *pHandle =
reinterpret_cast<WinThreader::ThreadHandle *>(param);
pHandle->m_run->RunThread(pHandle);
ThreadParams params;
EnterCriticalSection(&pHandle->m_crit);
pHandle->m_state = Thread_Done;
pHandle->GetParams(&params);
LeaveCriticalSection(&pHandle->m_crit);
pHandle->m_run->OnTerminate(pHandle, false);
if (params.flags & Thread_AutoRelease)
delete pHandle;
return 0;
}
void WinThreader::GetPriorityBounds(ThreadPriority &max, ThreadPriority &min)
{
max = ThreadPrio_Maximum;
min = ThreadPrio_Minimum;
}
ThreadParams g_defparams;
IThreadHandle *WinThreader::MakeThread(IThread *pThread, const ThreadParams *params)
{
if (params == NULL)
params = &g_defparams;
WinThreader::ThreadHandle *pHandle =
new WinThreader::ThreadHandle(this, NULL, pThread, params);
DWORD tid;
pHandle->m_thread =
CreateThread(NULL, 0, &Win32_ThreadGate, (LPVOID)pHandle, CREATE_SUSPENDED, &tid);
if (!pHandle->m_thread)
{
delete pHandle;
return NULL;
}
if (pHandle->m_params.prio != ThreadPrio_Normal)
{
pHandle->SetPriority(pHandle->m_params.prio);
}
if (!(pHandle->m_params.flags & Thread_CreateSuspended))
{
pHandle->Unpause();
}
return pHandle;
}
IEventSignal *WinThreader::MakeEventSignal()
{
HANDLE event = CreateEventA(NULL, FALSE, FALSE, NULL);
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if (!event)
return NULL;
WinEvent *pEvent = new WinEvent(event);
return pEvent;
}
/*****************
**** Mutexes ****
*****************/
WinThreader::WinMutex::~WinMutex()
{
if (m_mutex)
{
CloseHandle(m_mutex);
m_mutex = NULL;
}
}
bool WinThreader::WinMutex::TryLock()
{
if (!m_mutex)
return false;
if (WaitForSingleObject(m_mutex, 0) != WAIT_FAILED)
return true;
return false;
}
void WinThreader::WinMutex::Lock()
{
if (!m_mutex)
return;
WaitForSingleObject(m_mutex, INFINITE);
}
void WinThreader::WinMutex::Unlock()
{
if (!m_mutex)
return;
ReleaseMutex(m_mutex);
}
void WinThreader::WinMutex::DestroyThis()
{
delete this;
}
/******************
* Thread Handles *
******************/
WinThreader::ThreadHandle::ThreadHandle(IThreader *parent, HANDLE hthread, IThread *run, const ThreadParams *params) :
m_parent(parent), m_thread(hthread), m_run(run), m_params(*params),
m_state(Thread_Paused)
{
InitializeCriticalSection(&m_crit);
}
WinThreader::ThreadHandle::~ThreadHandle()
{
if (m_thread)
{
CloseHandle(m_thread);
m_thread = NULL;
}
DeleteCriticalSection(&m_crit);
}
bool WinThreader::ThreadHandle::WaitForThread()
{
if (m_thread == NULL)
return false;
if (WaitForSingleObject(m_thread, INFINITE) != 0)
return false;
return true;
}
ThreadState WinThreader::ThreadHandle::GetState()
{
ThreadState state;
EnterCriticalSection(&m_crit);
state = m_state;
LeaveCriticalSection(&m_crit);
return state;
}
IThreadCreator *WinThreader::ThreadHandle::Parent()
{
return m_parent;
}
void WinThreader::ThreadHandle::DestroyThis()
{
if (m_params.flags & Thread_AutoRelease)
return;
delete this;
}
void WinThreader::ThreadHandle::GetParams(ThreadParams *ptparams)
{
if (!ptparams)
return;
*ptparams = m_params;
}
ThreadPriority WinThreader::ThreadHandle::GetPriority()
{
return m_params.prio;
}
bool WinThreader::ThreadHandle::SetPriority(ThreadPriority prio)
{
if (!m_thread)
return false;
BOOL res = FALSE;
if (prio >= ThreadPrio_Maximum)
res = SetThreadPriority(m_thread, THREAD_PRIORITY_HIGHEST);
else if (prio <= ThreadPrio_Minimum)
res = SetThreadPriority(m_thread, THREAD_PRIORITY_LOWEST);
else if (prio == ThreadPrio_Normal)
res = SetThreadPriority(m_thread, THREAD_PRIORITY_NORMAL);
else if (prio == ThreadPrio_High)
res = SetThreadPriority(m_thread, THREAD_PRIORITY_ABOVE_NORMAL);
else if (prio == ThreadPrio_Low)
res = SetThreadPriority(m_thread, THREAD_PRIORITY_BELOW_NORMAL);
m_params.prio = prio;
return (res != FALSE);
}
bool WinThreader::ThreadHandle::Unpause()
{
if (!m_thread)
return false;
if (m_state != Thread_Paused)
return false;
m_state = Thread_Running;
if (ResumeThread(m_thread) == -1)
{
m_state = Thread_Paused;
return false;
}
return true;
}
/*****************
* EVENT SIGNALS *
*****************/
WinThreader::WinEvent::~WinEvent()
{
CloseHandle(m_event);
}
void WinThreader::WinEvent::Wait()
{
WaitForSingleObject(m_event, INFINITE);
}
void WinThreader::WinEvent::Signal()
{
SetEvent(m_event);
}
void WinThreader::WinEvent::DestroyThis()
{
delete this;
}