/**
 * WinPR: Windows Portable Runtime
 * Synchronization Functions
 *
 * Copyright 2012 Marc-Andre Moreau <marcandre.moreau@gmail.com>
 * Copyright 2014 Thincast Technologies GmbH
 * Copyright 2014 Norbert Federa <norbert.federa@thincast.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_SYNCH_H
#define WINPR_SYNCH_H

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <winpr/winpr.h>
#include <winpr/wtypes.h>
#include <winpr/error.h>
#include <winpr/handle.h>

#include <winpr/nt.h>

#ifdef __cplusplus
extern "C" {
#endif

#ifndef _WIN32

/* Mutex */

WINPR_API HANDLE CreateMutexA(LPSECURITY_ATTRIBUTES lpMutexAttributes, BOOL bInitialOwner, LPCSTR lpName);
WINPR_API HANDLE CreateMutexW(LPSECURITY_ATTRIBUTES lpMutexAttributes, BOOL bInitialOwner, LPCWSTR lpName);

WINPR_API HANDLE CreateMutexExA(LPSECURITY_ATTRIBUTES lpMutexAttributes, LPCTSTR lpName, DWORD dwFlags, DWORD dwDesiredAccess);
WINPR_API HANDLE CreateMutexExW(LPSECURITY_ATTRIBUTES lpMutexAttributes, LPCWSTR lpName, DWORD dwFlags, DWORD dwDesiredAccess);

WINPR_API HANDLE OpenMutexA(DWORD dwDesiredAccess, BOOL bInheritHandle,LPCSTR lpName);
WINPR_API HANDLE OpenMutexW(DWORD dwDesiredAccess, BOOL bInheritHandle,LPCWSTR lpName);

WINPR_API BOOL ReleaseMutex(HANDLE hMutex);

#ifdef UNICODE
#define CreateMutex	CreateMutexW
#define CreateMutexEx	CreateMutexExW
#define OpenMutex	OpenMutexW
#else
#define CreateMutex	CreateMutexA
#define CreateMutexEx	CreateMutexExA
#define OpenMutex	OpenMutexA
#endif

/* Semaphore */

WINPR_API HANDLE CreateSemaphoreA(LPSECURITY_ATTRIBUTES lpSemaphoreAttributes, LONG lInitialCount, LONG lMaximumCount, LPCSTR lpName);
WINPR_API HANDLE CreateSemaphoreW(LPSECURITY_ATTRIBUTES lpSemaphoreAttributes, LONG lInitialCount, LONG lMaximumCount, LPCWSTR lpName);

WINPR_API HANDLE OpenSemaphoreA(DWORD dwDesiredAccess, BOOL bInheritHandle, LPCSTR lpName);
WINPR_API HANDLE OpenSemaphoreW(DWORD dwDesiredAccess, BOOL bInheritHandle, LPCWSTR lpName);

#ifdef UNICODE
#define CreateSemaphore		CreateSemaphoreW
#define OpenSemaphore		OpenSemaphoreW
#else
#define CreateSemaphore		CreateSemaphoreA
#define OpenSemaphore		OpenSemaphoreA
#endif

WINPR_API BOOL ReleaseSemaphore(HANDLE hSemaphore, LONG lReleaseCount, LPLONG lpPreviousCount);

/* Event */

WINPR_API HANDLE CreateEventA(LPSECURITY_ATTRIBUTES lpEventAttributes, BOOL bManualReset, BOOL bInitialState, LPCSTR lpName);
WINPR_API HANDLE CreateEventW(LPSECURITY_ATTRIBUTES lpEventAttributes, BOOL bManualReset, BOOL bInitialState, LPCWSTR lpName);

WINPR_API HANDLE CreateEventExA(LPSECURITY_ATTRIBUTES lpEventAttributes, LPCSTR lpName, DWORD dwFlags, DWORD dwDesiredAccess);
WINPR_API HANDLE CreateEventExW(LPSECURITY_ATTRIBUTES lpEventAttributes, LPCWSTR lpName, DWORD dwFlags, DWORD dwDesiredAccess);

WINPR_API HANDLE OpenEventA(DWORD dwDesiredAccess, BOOL bInheritHandle, LPCSTR lpName);
WINPR_API HANDLE OpenEventW(DWORD dwDesiredAccess, BOOL bInheritHandle, LPCWSTR lpName);

WINPR_API BOOL SetEvent(HANDLE hEvent);
WINPR_API BOOL ResetEvent(HANDLE hEvent);

#ifdef UNICODE
#define CreateEvent		CreateEventW
#define CreateEventEx		CreateEventExW
#define OpenEvent		OpenEventW
#else
#define CreateEvent		CreateEventA
#define CreateEventEx		CreateEventExA
#define OpenEvent		OpenEventA
#endif

/* Slim Reader/Writer (SRW) Lock */

typedef PVOID RTL_SRWLOCK;
typedef RTL_SRWLOCK SRWLOCK, *PSRWLOCK;

WINPR_API VOID InitializeSRWLock(PSRWLOCK SRWLock);

WINPR_API VOID AcquireSRWLockExclusive(PSRWLOCK SRWLock);
WINPR_API VOID AcquireSRWLockShared(PSRWLOCK SRWLock);

WINPR_API BOOL TryAcquireSRWLockExclusive(PSRWLOCK SRWLock);
WINPR_API BOOL TryAcquireSRWLockShared(PSRWLOCK SRWLock);

WINPR_API VOID ReleaseSRWLockExclusive(PSRWLOCK SRWLock);
WINPR_API VOID ReleaseSRWLockShared(PSRWLOCK SRWLock);

/* Condition Variable */

typedef PVOID RTL_CONDITION_VARIABLE;
typedef RTL_CONDITION_VARIABLE CONDITION_VARIABLE, *PCONDITION_VARIABLE;

/* Critical Section */

#if defined(__linux__)
/**
 * Linux NPTL thread synchronization primitives are implemented using
 * the futex system calls ... we can't beat futex with a spin loop.
 */
#define WINPR_CRITICAL_SECTION_DISABLE_SPINCOUNT
#endif

typedef struct _RTL_CRITICAL_SECTION
{
	PVOID DebugInfo;
	LONG LockCount;
	LONG RecursionCount;
	HANDLE OwningThread;
	HANDLE LockSemaphore;
	ULONG_PTR SpinCount;
} RTL_CRITICAL_SECTION, *PRTL_CRITICAL_SECTION;

typedef RTL_CRITICAL_SECTION CRITICAL_SECTION;
typedef PRTL_CRITICAL_SECTION PCRITICAL_SECTION;
typedef PRTL_CRITICAL_SECTION LPCRITICAL_SECTION;

WINPR_API VOID InitializeCriticalSection(LPCRITICAL_SECTION lpCriticalSection);
WINPR_API BOOL InitializeCriticalSectionEx(LPCRITICAL_SECTION lpCriticalSection, DWORD dwSpinCount, DWORD Flags);
WINPR_API BOOL InitializeCriticalSectionAndSpinCount(LPCRITICAL_SECTION lpCriticalSection, DWORD dwSpinCount);

WINPR_API DWORD SetCriticalSectionSpinCount(LPCRITICAL_SECTION lpCriticalSection, DWORD dwSpinCount);

WINPR_API VOID EnterCriticalSection(LPCRITICAL_SECTION lpCriticalSection);
WINPR_API BOOL TryEnterCriticalSection(LPCRITICAL_SECTION lpCriticalSection);

WINPR_API VOID LeaveCriticalSection(LPCRITICAL_SECTION lpCriticalSection);

WINPR_API VOID DeleteCriticalSection(LPCRITICAL_SECTION lpCriticalSection);

/* Sleep */

WINPR_API VOID Sleep(DWORD dwMilliseconds);
WINPR_API DWORD SleepEx(DWORD dwMilliseconds, BOOL bAlertable);

/* Address */

WINPR_API VOID WakeByAddressAll(PVOID Address);
WINPR_API VOID WakeByAddressSingle(PVOID Address);

WINPR_API BOOL WaitOnAddress(VOID volatile *Address, PVOID CompareAddress, SIZE_T AddressSize, DWORD dwMilliseconds);

/* Wait */

#define INFINITE		0xFFFFFFFF

#define WAIT_OBJECT_0		0x00000000L
#define WAIT_ABANDONED		0x00000080L

#ifndef WAIT_TIMEOUT
#define WAIT_TIMEOUT		0x00000102L
#endif

#define WAIT_FAILED		((DWORD) 0xFFFFFFFF)

#define MAXIMUM_WAIT_OBJECTS	64

WINPR_API DWORD WaitForSingleObject(HANDLE hHandle, DWORD dwMilliseconds);
WINPR_API DWORD WaitForSingleObjectEx(HANDLE hHandle, DWORD dwMilliseconds, BOOL bAlertable);
WINPR_API DWORD WaitForMultipleObjects(DWORD nCount, const HANDLE* lpHandles, BOOL bWaitAll, DWORD dwMilliseconds);
WINPR_API DWORD WaitForMultipleObjectsEx(DWORD nCount, const HANDLE* lpHandles, BOOL bWaitAll, DWORD dwMilliseconds, BOOL bAlertable);

WINPR_API DWORD SignalObjectAndWait(HANDLE hObjectToSignal, HANDLE hObjectToWaitOn, DWORD dwMilliseconds, BOOL bAlertable);

/* Waitable Timer */

#define CREATE_WAITABLE_TIMER_MANUAL_RESET		0x00000001

typedef struct _REASON_CONTEXT
{
	ULONG Version;
	DWORD Flags;

	union
	{
		struct
		{
			HMODULE LocalizedReasonModule;
			ULONG LocalizedReasonId;
			ULONG ReasonStringCount;
			LPWSTR* ReasonStrings;
		} Detailed;

		LPWSTR SimpleReasonString;
	} Reason;
} REASON_CONTEXT, *PREASON_CONTEXT;

typedef VOID (*PTIMERAPCROUTINE)(LPVOID lpArgToCompletionRoutine, DWORD dwTimerLowValue, DWORD dwTimerHighValue);

WINPR_API HANDLE CreateWaitableTimerA(LPSECURITY_ATTRIBUTES lpTimerAttributes, BOOL bManualReset, LPCSTR lpTimerName);
WINPR_API HANDLE CreateWaitableTimerW(LPSECURITY_ATTRIBUTES lpTimerAttributes, BOOL bManualReset, LPCWSTR lpTimerName);

WINPR_API HANDLE CreateWaitableTimerExA(LPSECURITY_ATTRIBUTES lpTimerAttributes, LPCSTR lpTimerName, DWORD dwFlags, DWORD dwDesiredAccess);
WINPR_API HANDLE CreateWaitableTimerExW(LPSECURITY_ATTRIBUTES lpTimerAttributes, LPCWSTR lpTimerName, DWORD dwFlags, DWORD dwDesiredAccess);

WINPR_API BOOL SetWaitableTimer(HANDLE hTimer, const LARGE_INTEGER* lpDueTime, LONG lPeriod,
		PTIMERAPCROUTINE pfnCompletionRoutine, LPVOID lpArgToCompletionRoutine, BOOL fResume);

WINPR_API BOOL SetWaitableTimerEx(HANDLE hTimer, const LARGE_INTEGER* lpDueTime, LONG lPeriod,
		PTIMERAPCROUTINE pfnCompletionRoutine, LPVOID lpArgToCompletionRoutine, PREASON_CONTEXT WakeContext, ULONG TolerableDelay);

WINPR_API HANDLE OpenWaitableTimerA(DWORD dwDesiredAccess, BOOL bInheritHandle, LPCSTR lpTimerName);
WINPR_API HANDLE OpenWaitableTimerW(DWORD dwDesiredAccess, BOOL bInheritHandle, LPCWSTR lpTimerName);

WINPR_API BOOL CancelWaitableTimer(HANDLE hTimer);

#ifdef UNICODE
#define CreateWaitableTimer		CreateWaitableTimerW
#define CreateWaitableTimerEx		CreateWaitableTimerExW
#define OpenWaitableTimer		OpenWaitableTimerW
#else
#define CreateWaitableTimer		CreateWaitableTimerA
#define CreateWaitableTimerEx		CreateWaitableTimerExA
#define OpenWaitableTimer		OpenWaitableTimerA
#endif

/**
 * Timer-Queue Timer
 */

#define WT_EXECUTEDEFAULT			0x00000000
#define WT_EXECUTEINIOTHREAD			0x00000001
#define WT_EXECUTEINUITHREAD			0x00000002
#define WT_EXECUTEINWAITTHREAD			0x00000004
#define WT_EXECUTEONLYONCE			0x00000008
#define WT_EXECUTELONGFUNCTION			0x00000010
#define WT_EXECUTEINTIMERTHREAD			0x00000020
#define WT_EXECUTEINPERSISTENTIOTHREAD		0x00000040
#define WT_EXECUTEINPERSISTENTTHREAD		0x00000080
#define WT_TRANSFER_IMPERSONATION		0x00000100

typedef VOID (*WAITORTIMERCALLBACK)(PVOID lpParameter, BOOLEAN TimerOrWaitFired);

WINPR_API HANDLE CreateTimerQueue(void);
WINPR_API BOOL DeleteTimerQueue(HANDLE TimerQueue);
WINPR_API BOOL DeleteTimerQueueEx(HANDLE TimerQueue, HANDLE CompletionEvent);

WINPR_API BOOL CreateTimerQueueTimer(PHANDLE phNewTimer, HANDLE TimerQueue,
		WAITORTIMERCALLBACK Callback, PVOID Parameter, DWORD DueTime, DWORD Period, ULONG Flags);
WINPR_API BOOL ChangeTimerQueueTimer(HANDLE TimerQueue, HANDLE Timer, ULONG DueTime, ULONG Period);
WINPR_API BOOL DeleteTimerQueueTimer(HANDLE TimerQueue, HANDLE Timer, HANDLE CompletionEvent);

#endif

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

WINPR_API BOOL InitializeCriticalSectionEx(LPCRITICAL_SECTION lpCriticalSection, DWORD dwSpinCount, DWORD Flags);

#endif

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

/* One-Time Initialization */

typedef struct _RTL_RUN_ONCE
{
	PVOID Ptr;
} RTL_RUN_ONCE, *PRTL_RUN_ONCE;

#define RTL_RUN_ONCE_INIT	{ 0 }
#define INIT_ONCE_STATIC_INIT	RTL_RUN_ONCE_INIT

typedef RTL_RUN_ONCE INIT_ONCE;
typedef PRTL_RUN_ONCE PINIT_ONCE;
typedef PRTL_RUN_ONCE LPINIT_ONCE;
typedef BOOL CALLBACK (*PINIT_ONCE_FN) (PINIT_ONCE InitOnce, PVOID Parameter, PVOID* Context);

WINPR_API BOOL InitOnceBeginInitialize(LPINIT_ONCE lpInitOnce, DWORD dwFlags, PBOOL fPending, LPVOID* lpContext);
WINPR_API BOOL InitOnceComplete(LPINIT_ONCE lpInitOnce, DWORD dwFlags, LPVOID lpContext);
WINPR_API BOOL InitOnceExecuteOnce(PINIT_ONCE InitOnce, PINIT_ONCE_FN InitFn, PVOID Parameter, LPVOID* Context);
WINPR_API VOID InitOnceInitialize(PINIT_ONCE InitOnce);

#endif

/* Synchronization Barrier */

#if (!defined(_WIN32)) || (defined(_WIN32) && (_WIN32_WINNT < 0x0602))

typedef struct _RTL_BARRIER
{
	DWORD Reserved1;
	DWORD Reserved2;
	ULONG_PTR Reserved3[2];
	DWORD Reserved4;
	DWORD Reserved5;
} RTL_BARRIER, *PRTL_BARRIER;

typedef RTL_BARRIER SYNCHRONIZATION_BARRIER;
typedef PRTL_BARRIER PSYNCHRONIZATION_BARRIER;
typedef PRTL_BARRIER LPSYNCHRONIZATION_BARRIER;

#define SYNCHRONIZATION_BARRIER_FLAGS_SPIN_ONLY		0x01
#define SYNCHRONIZATION_BARRIER_FLAGS_BLOCK_ONLY	0x02
#define SYNCHRONIZATION_BARRIER_FLAGS_NO_DELETE		0x04

WINPR_API BOOL WINAPI InitializeSynchronizationBarrier(LPSYNCHRONIZATION_BARRIER lpBarrier, LONG lTotalThreads, LONG lSpinCount);
WINPR_API BOOL WINAPI EnterSynchronizationBarrier(LPSYNCHRONIZATION_BARRIER lpBarrier, DWORD dwFlags);
WINPR_API BOOL WINAPI DeleteSynchronizationBarrier(LPSYNCHRONIZATION_BARRIER lpBarrier);

#endif
/* Extended API */

WINPR_API VOID USleep(DWORD dwMicroseconds);

WINPR_API HANDLE CreateFileDescriptorEventW(LPSECURITY_ATTRIBUTES lpEventAttributes,
		BOOL bManualReset, BOOL bInitialState, int FileDescriptor, ULONG mode);
WINPR_API HANDLE CreateFileDescriptorEventA(LPSECURITY_ATTRIBUTES lpEventAttributes,
		BOOL bManualReset, BOOL bInitialState, int FileDescriptor, ULONG mode);

WINPR_API HANDLE CreateWaitObjectEvent(LPSECURITY_ATTRIBUTES lpEventAttributes,
		BOOL bManualReset, BOOL bInitialState, void* pObject);

#ifdef UNICODE
#define CreateFileDescriptorEvent	CreateFileDescriptorEventW
#else
#define CreateFileDescriptorEvent	CreateFileDescriptorEventA
#endif

WINPR_API int GetEventFileDescriptor(HANDLE hEvent);
WINPR_API int SetEventFileDescriptor(HANDLE hEvent, int FileDescriptor, ULONG mode);

WINPR_API void* GetEventWaitObject(HANDLE hEvent);

#ifdef __cplusplus
}
#endif

#endif /* WINPR_SYNCH_H */

