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/**
* WinPR: Windows Portable Runtime
* Thread Pool API (Work)
*
* Copyright 2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>
*
* Licensed 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <winpr/crt.h>
#include <winpr/pool.h>
#include <winpr/library.h>
#include "pool.h"
#include "../log.h"
#define TAG WINPR_TAG("pool")
#ifdef WINPR_THREAD_POOL
#ifdef _WIN32
static INIT_ONCE init_once_module = INIT_ONCE_STATIC_INIT;
static PTP_WORK(WINAPI* pCreateThreadpoolWork)(PTP_WORK_CALLBACK pfnwk, PVOID pv,
PTP_CALLBACK_ENVIRON pcbe);
static VOID (WINAPI* pCloseThreadpoolWork)(PTP_WORK pwk);
static VOID (WINAPI* pSubmitThreadpoolWork)(PTP_WORK pwk);
static BOOL (WINAPI* pTrySubmitThreadpoolCallback)(PTP_SIMPLE_CALLBACK pfns, PVOID pv,
PTP_CALLBACK_ENVIRON pcbe);
static VOID (WINAPI* pWaitForThreadpoolWorkCallbacks)(PTP_WORK pwk, BOOL fCancelPendingCallbacks);
static BOOL CALLBACK init_module(PINIT_ONCE once, PVOID param, PVOID* context)
{
HMODULE kernel32 = LoadLibraryA("kernel32.dll");
if (kernel32)
{
pCreateThreadpoolWork = (void*)GetProcAddress(kernel32, "CreateThreadpoolWork");
pCloseThreadpoolWork = (void*)GetProcAddress(kernel32, "CloseThreadpoolWork");
pSubmitThreadpoolWork = (void*)GetProcAddress(kernel32, "SubmitThreadpoolWork");
pTrySubmitThreadpoolCallback = (void*)GetProcAddress(kernel32, "TrySubmitThreadpoolCallback");
pWaitForThreadpoolWorkCallbacks = (void*)GetProcAddress(kernel32, "WaitForThreadpoolWorkCallbacks");
}
return TRUE;
}
#endif
static TP_CALLBACK_ENVIRON DEFAULT_CALLBACK_ENVIRONMENT =
{
1, /* Version */
NULL, /* Pool */
NULL, /* CleanupGroup */
NULL, /* CleanupGroupCancelCallback */
NULL, /* RaceDll */
NULL, /* ActivationContext */
NULL, /* FinalizationCallback */
{ 0 } /* Flags */
};
PTP_WORK winpr_CreateThreadpoolWork(PTP_WORK_CALLBACK pfnwk, PVOID pv, PTP_CALLBACK_ENVIRON pcbe)
{
PTP_WORK work = NULL;
#ifdef _WIN32
InitOnceExecuteOnce(&init_once_module, init_module, NULL, NULL);
if (pCreateThreadpoolWork)
return pCreateThreadpoolWork(pfnwk, pv, pcbe);
#endif
work = (PTP_WORK) calloc(1, sizeof(TP_WORK));
if (work)
{
if (!pcbe)
{
pcbe = &DEFAULT_CALLBACK_ENVIRONMENT;
pcbe->Pool = GetDefaultThreadpool();
}
work->CallbackEnvironment = pcbe;
work->WorkCallback = pfnwk;
work->CallbackParameter = pv;
#ifndef _WIN32
if (pcbe->CleanupGroup)
ArrayList_Add(pcbe->CleanupGroup->groups, work);
#endif
}
return work;
}
VOID winpr_CloseThreadpoolWork(PTP_WORK pwk)
{
#ifdef _WIN32
InitOnceExecuteOnce(&init_once_module, init_module, NULL, NULL);
if (pCloseThreadpoolWork)
{
pCloseThreadpoolWork(pwk);
return;
}
#else
if (pwk->CallbackEnvironment->CleanupGroup)
ArrayList_Remove(pwk->CallbackEnvironment->CleanupGroup->groups, pwk);
#endif
free(pwk);
}
VOID winpr_SubmitThreadpoolWork(PTP_WORK pwk)
{
PTP_POOL pool;
PTP_CALLBACK_INSTANCE callbackInstance;
#ifdef _WIN32
InitOnceExecuteOnce(&init_once_module, init_module, NULL, NULL);
if (pSubmitThreadpoolWork)
{
pSubmitThreadpoolWork(pwk);
return;
}
#endif
pool = pwk->CallbackEnvironment->Pool;
callbackInstance = (PTP_CALLBACK_INSTANCE) calloc(1, sizeof(TP_CALLBACK_INSTANCE));
if (callbackInstance)
{
callbackInstance->Work = pwk;
CountdownEvent_AddCount(pool->WorkComplete, 1);
Queue_Enqueue(pool->PendingQueue, callbackInstance);
}
}
BOOL winpr_TrySubmitThreadpoolCallback(PTP_SIMPLE_CALLBACK pfns, PVOID pv,
PTP_CALLBACK_ENVIRON pcbe)
{
#ifdef _WIN32
InitOnceExecuteOnce(&init_once_module, init_module, NULL, NULL);
if (pTrySubmitThreadpoolCallback)
return pTrySubmitThreadpoolCallback(pfns, pv, pcbe);
#endif
WLog_ERR(TAG, "TrySubmitThreadpoolCallback is not implemented");
return FALSE;
}
VOID winpr_WaitForThreadpoolWorkCallbacks(PTP_WORK pwk, BOOL fCancelPendingCallbacks)
{
HANDLE event;
PTP_POOL pool;
#ifdef _WIN32
InitOnceExecuteOnce(&init_once_module, init_module, NULL, NULL);
if (pWaitForThreadpoolWorkCallbacks)
{
pWaitForThreadpoolWorkCallbacks(pwk, fCancelPendingCallbacks);
return;
}
#endif
pool = pwk->CallbackEnvironment->Pool;
event = CountdownEvent_WaitHandle(pool->WorkComplete);
if (WaitForSingleObject(event, INFINITE) != WAIT_OBJECT_0)
WLog_ERR(TAG, "error waiting on work completion");
}
#endif /* WINPR_THREAD_POOL defined */
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