/**

 * WinPR: Windows Portable Runtime

 * Thread Pool API (Clean-up Group)

 *

 * 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"

#ifdef WINPR_THREAD_POOL

#ifdef _WIN32

static INIT_ONCE init_once_module = INIT_ONCE_STATIC_INIT;

static PTP_CLEANUP_GROUP(WINAPI* pCreateThreadpoolCleanupGroup)();

static VOID(WINAPI* pCloseThreadpoolCleanupGroupMembers)(PTP_CLEANUP_GROUP ptpcg,

                                                         BOOL fCancelPendingCallbacks,

                                                         PVOID pvCleanupContext);

static VOID(WINAPI* pCloseThreadpoolCleanupGroup)(PTP_CLEANUP_GROUP ptpcg);

static BOOL CALLBACK init_module(PINIT_ONCE once, PVOID param, PVOID* context)

{

	HMODULE kernel32 = LoadLibraryA("kernel32.dll");

	if (kernel32)

	{

		pCreateThreadpoolCleanupGroup =

		    (void*)GetProcAddress(kernel32, "CreateThreadpoolCleanupGroup");

		pCloseThreadpoolCleanupGroupMembers =

		    (void*)GetProcAddress(kernel32, "CloseThreadpoolCleanupGroupMembers");

		pCloseThreadpoolCleanupGroup =

		    (void*)GetProcAddress(kernel32, "CloseThreadpoolCleanupGroup");

	}

	return TRUE;

}

#endif

PTP_CLEANUP_GROUP winpr_CreateThreadpoolCleanupGroup(void)

{

	PTP_CLEANUP_GROUP cleanupGroup = NULL;

#ifdef _WIN32

	InitOnceExecuteOnce(&init_once_module, init_module, NULL, NULL);

	if (pCreateThreadpoolCleanupGroup)

		return pCreateThreadpoolCleanupGroup();

	return cleanupGroup;

#else

	cleanupGroup = (PTP_CLEANUP_GROUP)calloc(1, sizeof(TP_CLEANUP_GROUP));

	if (!cleanupGroup)

		return NULL;

	cleanupGroup->groups = ArrayList_New(FALSE);

	if (!cleanupGroup->groups)

	{

		free(cleanupGroup);

		return NULL;

	}

	return cleanupGroup;

#endif

}

VOID winpr_SetThreadpoolCallbackCleanupGroup(PTP_CALLBACK_ENVIRON pcbe, PTP_CLEANUP_GROUP ptpcg,

                                             PTP_CLEANUP_GROUP_CANCEL_CALLBACK pfng)

{

	pcbe->CleanupGroup = ptpcg;

	pcbe->CleanupGroupCancelCallback = pfng;

#ifndef _WIN32

	pcbe->CleanupGroup->env = pcbe;

#endif

}

VOID winpr_CloseThreadpoolCleanupGroupMembers(PTP_CLEANUP_GROUP ptpcg, BOOL fCancelPendingCallbacks,

                                              PVOID pvCleanupContext)

{

#ifdef _WIN32

	InitOnceExecuteOnce(&init_once_module, init_module, NULL, NULL);

	if (pCloseThreadpoolCleanupGroupMembers)

	{

		pCloseThreadpoolCleanupGroupMembers(ptpcg, fCancelPendingCallbacks, pvCleanupContext);

		return;

	}

#else

	while (ArrayList_Count(ptpcg->groups) > 0)

	{

		PTP_WORK work = ArrayList_GetItem(ptpcg->groups, 0);

		winpr_CloseThreadpoolWork(work);

	}

#endif

}

VOID winpr_CloseThreadpoolCleanupGroup(PTP_CLEANUP_GROUP ptpcg)

{

#ifdef _WIN32

	InitOnceExecuteOnce(&init_once_module, init_module, NULL, NULL);

	if (pCloseThreadpoolCleanupGroup)

	{

		pCloseThreadpoolCleanupGroup(ptpcg);

		return;

	}

#else

	if (ptpcg && ptpcg->groups)

		ArrayList_Free(ptpcg->groups);

	if (ptpcg && ptpcg->env)

		ptpcg->env->CleanupGroup = NULL;

	free(ptpcg);

#endif

}

#endif /* WINPR_THREAD_POOL defined */