/**

 * WinPR: Windows Portable Runtime

 * Thread Pool API

 *

 * 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.

 */

#ifndef WINPR_POOL_H

#define WINPR_POOL_H

#include <winpr/winpr.h>

#include <winpr/wtypes.h>

#include <winpr/synch.h>

#include <winpr/thread.h>

#ifndef _WIN32

typedef DWORD TP_VERSION, *PTP_VERSION;

typedef struct _TP_CALLBACK_INSTANCE TP_CALLBACK_INSTANCE, *PTP_CALLBACK_INSTANCE;

typedef VOID (*PTP_SIMPLE_CALLBACK)(PTP_CALLBACK_INSTANCE Instance, PVOID Context);

typedef struct _TP_POOL TP_POOL, *PTP_POOL;

typedef struct _TP_POOL_STACK_INFORMATION

{

	SIZE_T StackReserve;

	SIZE_T StackCommit;

} TP_POOL_STACK_INFORMATION, *PTP_POOL_STACK_INFORMATION;

typedef struct _TP_CLEANUP_GROUP TP_CLEANUP_GROUP, *PTP_CLEANUP_GROUP;

typedef VOID (*PTP_CLEANUP_GROUP_CANCEL_CALLBACK)(PVOID ObjectContext, PVOID CleanupContext);

typedef struct _TP_CALLBACK_ENVIRON_V1

{

	TP_VERSION Version;

	PTP_POOL Pool;

	PTP_CLEANUP_GROUP CleanupGroup;

	PTP_CLEANUP_GROUP_CANCEL_CALLBACK CleanupGroupCancelCallback;

	PVOID RaceDll;

	struct _ACTIVATION_CONTEXT* ActivationContext;

	PTP_SIMPLE_CALLBACK FinalizationCallback;

	union

	{

		DWORD Flags;

		struct

		{

			DWORD LongFunction: 1;

			DWORD Persistent: 1;

			DWORD Private: 30;

		} s;

	} u;

} TP_CALLBACK_ENVIRON_V1;

typedef TP_CALLBACK_ENVIRON_V1 TP_CALLBACK_ENVIRON, *PTP_CALLBACK_ENVIRON;

#endif /* _WIN32 not defined */

typedef struct _TP_WORK TP_WORK, *PTP_WORK;

typedef struct _TP_TIMER TP_TIMER, *PTP_TIMER;

typedef DWORD TP_WAIT_RESULT;

typedef struct _TP_WAIT TP_WAIT, *PTP_WAIT;

typedef struct _TP_IO TP_IO, *PTP_IO;

#ifndef _WIN32

typedef VOID (*PTP_WORK_CALLBACK)(PTP_CALLBACK_INSTANCE Instance, PVOID Context, PTP_WORK Work);

typedef VOID (*PTP_TIMER_CALLBACK)(PTP_CALLBACK_INSTANCE Instance, PVOID Context, PTP_TIMER Timer);

typedef VOID (*PTP_WAIT_CALLBACK)(PTP_CALLBACK_INSTANCE Instance, PVOID Context, PTP_WAIT Wait,

                                  TP_WAIT_RESULT WaitResult);

#endif

/*

There is a bug in the Win8 header that defines the IO

callback unconditionally. Versions of Windows greater

than XP will conditionally define it. The following

logic tries to fix that.

*/

#ifdef _THREADPOOLAPISET_H_

#define PTP_WIN32_IO_CALLBACK_DEFINED 1

#else

#if (_WIN32_WINNT >= 0x0600)

#define PTP_WIN32_IO_CALLBACK_DEFINED 1

#endif

#endif

#ifndef PTP_WIN32_IO_CALLBACK_DEFINED

typedef VOID (*PTP_WIN32_IO_CALLBACK)(PTP_CALLBACK_INSTANCE Instance, PVOID Context,

                                      PVOID Overlapped,

                                      ULONG IoResult, ULONG_PTR NumberOfBytesTransferred, PTP_IO Io);

#endif

#if (!defined(_WIN32) || ((defined(_WIN32) && (_WIN32_WINNT < 0x0600))))

#define WINPR_THREAD_POOL	1

#endif

#ifdef __cplusplus

extern "C" {

#endif

/* Synch */

#ifdef WINPR_THREAD_POOL

WINPR_API PTP_WAIT winpr_CreateThreadpoolWait(PTP_WAIT_CALLBACK pfnwa, PVOID pv,

        PTP_CALLBACK_ENVIRON pcbe);

WINPR_API VOID winpr_CloseThreadpoolWait(PTP_WAIT pwa);

WINPR_API VOID winpr_SetThreadpoolWait(PTP_WAIT pwa, HANDLE h, PFILETIME pftTimeout);

WINPR_API VOID winpr_WaitForThreadpoolWaitCallbacks(PTP_WAIT pwa, BOOL fCancelPendingCallbacks);

#define CreateThreadpoolWait winpr_CreateThreadpoolWait

#define CloseThreadpoolWait winpr_CloseThreadpoolWait

#define SetThreadpoolWait winpr_SetThreadpoolWait

#define WaitForThreadpoolWaitCallbacks winpr_WaitForThreadpoolWaitCallbacks

/* Work */

WINPR_API PTP_WORK winpr_CreateThreadpoolWork(PTP_WORK_CALLBACK pfnwk, PVOID pv,

        PTP_CALLBACK_ENVIRON pcbe);

WINPR_API VOID winpr_CloseThreadpoolWork(PTP_WORK pwk);

WINPR_API VOID winpr_SubmitThreadpoolWork(PTP_WORK pwk);

WINPR_API BOOL winpr_TrySubmitThreadpoolCallback(PTP_SIMPLE_CALLBACK pfns, PVOID pv,

        PTP_CALLBACK_ENVIRON pcbe);

WINPR_API VOID winpr_WaitForThreadpoolWorkCallbacks(PTP_WORK pwk, BOOL fCancelPendingCallbacks);

#define CreateThreadpoolWork winpr_CreateThreadpoolWork

#define CloseThreadpoolWork winpr_CloseThreadpoolWork

#define SubmitThreadpoolWork winpr_SubmitThreadpoolWork

#define TrySubmitThreadpoolCallback winpr_TrySubmitThreadpoolCallback

#define WaitForThreadpoolWorkCallbacks winpr_WaitForThreadpoolWorkCallbacks

/* Timer */

WINPR_API PTP_TIMER winpr_CreateThreadpoolTimer(PTP_TIMER_CALLBACK pfnti, PVOID pv,

        PTP_CALLBACK_ENVIRON pcbe);

WINPR_API VOID winpr_CloseThreadpoolTimer(PTP_TIMER pti);

WINPR_API BOOL winpr_IsThreadpoolTimerSet(PTP_TIMER pti);

WINPR_API VOID winpr_SetThreadpoolTimer(PTP_TIMER pti, PFILETIME pftDueTime, DWORD msPeriod,

                                        DWORD msWindowLength);

WINPR_API VOID winpr_WaitForThreadpoolTimerCallbacks(PTP_TIMER pti, BOOL fCancelPendingCallbacks);

#define CreateThreadpoolTimer winpr_CreateThreadpoolTimer

#define CloseThreadpoolTimer winpr_CloseThreadpoolTimer

#define IsThreadpoolTimerSet winpr_IsThreadpoolTimerSet

#define SetThreadpoolTimer winpr_SetThreadpoolTimer

#define WaitForThreadpoolTimerCallbacks winpr_WaitForThreadpoolTimerCallbacks

/* I/O */

WINPR_API PTP_IO winpr_CreateThreadpoolIo(HANDLE fl, PTP_WIN32_IO_CALLBACK pfnio, PVOID pv,

        PTP_CALLBACK_ENVIRON pcbe);

WINPR_API VOID winpr_CloseThreadpoolIo(PTP_IO pio);

WINPR_API VOID winpr_StartThreadpoolIo(PTP_IO pio);

WINPR_API VOID winpr_CancelThreadpoolIo(PTP_IO pio);

WINPR_API VOID winpr_WaitForThreadpoolIoCallbacks(PTP_IO pio, BOOL fCancelPendingCallbacks);

#define CreateThreadpoolIo winpr_CreateThreadpoolIo

#define CloseThreadpoolIo winpr_CloseThreadpoolIo

#define StartThreadpoolIo winpr_StartThreadpoolIo

#define CancelThreadpoolIo winpr_CancelThreadpoolIo

#define WaitForThreadpoolIoCallbacks winpr_WaitForThreadpoolIoCallbacks

/* Clean-up Group */

WINPR_API VOID winpr_SetThreadpoolCallbackCleanupGroup(PTP_CALLBACK_ENVIRON pcbe, PTP_CLEANUP_GROUP ptpcg,

                                       PTP_CLEANUP_GROUP_CANCEL_CALLBACK pfng);

WINPR_API PTP_CLEANUP_GROUP winpr_CreateThreadpoolCleanupGroup(void);

WINPR_API VOID winpr_CloseThreadpoolCleanupGroupMembers(PTP_CLEANUP_GROUP ptpcg,

        BOOL fCancelPendingCallbacks, PVOID pvCleanupContext);

WINPR_API VOID winpr_CloseThreadpoolCleanupGroup(PTP_CLEANUP_GROUP ptpcg);

#define SetThreadpoolCallbackCleanupGroup winpr_SetThreadpoolCallbackCleanupGroup

#define CreateThreadpoolCleanupGroup winpr_CreateThreadpoolCleanupGroup

#define CloseThreadpoolCleanupGroupMembers winpr_CloseThreadpoolCleanupGroupMembers

#define CloseThreadpoolCleanupGroup winpr_CloseThreadpoolCleanupGroup

/* Pool */

WINPR_API PTP_POOL winpr_CreateThreadpool(PVOID reserved);

WINPR_API VOID winpr_CloseThreadpool(PTP_POOL ptpp);

WINPR_API BOOL winpr_SetThreadpoolThreadMinimum(PTP_POOL ptpp, DWORD cthrdMic);

WINPR_API VOID winpr_SetThreadpoolThreadMaximum(PTP_POOL ptpp, DWORD cthrdMost);

#define CreateThreadpool winpr_CreateThreadpool

#define CloseThreadpool winpr_CloseThreadpool

#define SetThreadpoolThreadMinimum winpr_SetThreadpoolThreadMinimum

#define SetThreadpoolThreadMaximum winpr_SetThreadpoolThreadMaximum

/* Callback Environment */

static INLINE VOID InitializeThreadpoolEnvironment(PTP_CALLBACK_ENVIRON pcbe)

{

	pcbe->Version = 1;

	pcbe->Pool = NULL;

	pcbe->CleanupGroup = NULL;

	pcbe->CleanupGroupCancelCallback = NULL;

	pcbe->RaceDll = NULL;

	pcbe->ActivationContext = NULL;

	pcbe->FinalizationCallback = NULL;

	pcbe->u.Flags = 0;

}

static INLINE VOID DestroyThreadpoolEnvironment(PTP_CALLBACK_ENVIRON pcbe)

{

	/* no actions, this may change in a future release. */

}

static INLINE VOID SetThreadpoolCallbackPool(PTP_CALLBACK_ENVIRON pcbe, PTP_POOL ptpp)

{

	pcbe->Pool = ptpp;

}

static INLINE VOID SetThreadpoolCallbackRunsLong(PTP_CALLBACK_ENVIRON pcbe)

{

	pcbe->u.s.LongFunction = 1;

}

static INLINE VOID SetThreadpoolCallbackLibrary(PTP_CALLBACK_ENVIRON pcbe, PVOID mod)

{

	pcbe->RaceDll = mod;

}

/* Callback */

WINPR_API BOOL winpr_CallbackMayRunLong(PTP_CALLBACK_INSTANCE pci);

/* Callback Clean-up */

WINPR_API VOID winpr_SetEventWhenCallbackReturns(PTP_CALLBACK_INSTANCE pci, HANDLE evt);

WINPR_API VOID winpr_ReleaseSemaphoreWhenCallbackReturns(PTP_CALLBACK_INSTANCE pci, HANDLE sem,

        DWORD crel);

WINPR_API VOID winpr_ReleaseMutexWhenCallbackReturns(PTP_CALLBACK_INSTANCE pci, HANDLE mut);

WINPR_API VOID winpr_LeaveCriticalSectionWhenCallbackReturns(PTP_CALLBACK_INSTANCE pci,

        PCRITICAL_SECTION pcs);

WINPR_API VOID winpr_FreeLibraryWhenCallbackReturns(PTP_CALLBACK_INSTANCE pci, HMODULE mod);

WINPR_API VOID winpr_DisassociateCurrentThreadFromCallback(PTP_CALLBACK_INSTANCE pci);

#define SetEventWhenCallbackReturns winpr_SetEventWhenCallbackReturns

#define ReleaseSemaphoreWhenCallbackReturns winpr_ReleaseSemaphoreWhenCallbackReturns

#define ReleaseMutexWhenCallbackReturns winpr_ReleaseMutexWhenCallbackReturns

#define LeaveCriticalSectionWhenCallbackReturns winpr_LeaveCriticalSectionWhenCallbackReturns

#define FreeLibraryWhenCallbackReturns winpr_FreeLibraryWhenCallbackReturns

#define DisassociateCurrentThreadFromCallback winpr_DisassociateCurrentThreadFromCallback

#endif

#ifdef __cplusplus

}

#endif

#endif /* WINPR_POOL_H */