/* Copyright (c) 1995-2000 Microsoft Corporation.  All rights reserved. */// included from dbg.c, apis.c, and stubs.c#ifdef IN_KERNEL#undef UCurThread#define UCurThread() hCurThread#endifextern void CheckTakeCritSec(LPCRITICAL_SECTION lpcs);/*	@doc BOTH EXTERNAL		@func VOID | InitializeCriticalSection | Initializes a critical section object.     @parm LPCRITICAL_SECTION | lpcsCriticalSection | address of critical section object  	@comm Follows the Win32 reference description without restrictions or modifications. */VOID WINAPI InitializeCriticalSection(LPCRITICAL_SECTION lpcs) {	/* Init the structure */	lpcs->LockCount = 0;	lpcs->OwnerThread = 0;	lpcs->needtrap = 0;	lpcs->hCrit = CreateCrit(lpcs);	DEBUGCHK(lpcs->hCrit);}/*	@doc BOTH EXTERNAL		@func VOID | DeleteCriticalSection | Releases all resources used by an unowned 	critical section object.     @parm LPCRITICAL_SECTION | lpCriticalSection | address of critical section object  	@comm Follows the Win32 reference description without restrictions or modifications. */VOID WINAPI DeleteCriticalSection(LPCRITICAL_SECTION lpcs) {	/* Just clear out the fields */	DEBUGCHK(!lpcs->OwnerThread);	CreateCrit((LPCRITICAL_SECTION)((DWORD)lpcs|1));	memset(lpcs,0,sizeof(CRITICAL_SECTION));}/* If fastpath, adjust critical section, else trap to kernel for rescheduling *//*	@doc BOTH EXTERNAL		@func VOID | EnterCriticalSection | Waits for ownership of the specified critical 	section object. The function returns when the calling thread is granted ownership. 		@parm LPCRITICAL_SECTION | lpCriticalSection | address of critical section object  	@comm Follows the Win32 reference description without restrictions or modifications. */#ifdef ARM#pragma optimize("",off)#endifVOID WINAPI EnterCriticalSection(LPCRITICAL_SECTION lpcs) {	HANDLE hTh = UCurThread();    volatile CRITICAL_SECTION *vpcs = lpcs;#ifdef DOCHECKCS	CheckTakeCritSec(lpcs);#endif	DEBUGCHK(!((DWORD)hTh & 1));	if (vpcs->OwnerThread == hTh)		vpcs->LockCount++; /* We are the owner - increment count */	else if (InterlockedTestExchange((LPLONG)&lpcs->OwnerThread,0,(LONG)hTh) == 0)		vpcs->LockCount = 1;	else		TakeCritSec(lpcs);}#ifdef COREDLLBOOL WINAPI TryEnterCriticalSection(LPCRITICAL_SECTION lpcs) {	BOOL bRet = TRUE;	HANDLE hTh = UCurThread();    volatile CRITICAL_SECTION *vpcs = lpcs;	DEBUGCHK(!((DWORD)hTh & 1));	if (vpcs->OwnerThread == hTh)		vpcs->LockCount++; /* We are the owner - increment count */	else if (InterlockedTestExchange((LPLONG)&lpcs->OwnerThread,0,(LONG)hTh) == 0)		vpcs->LockCount = 1;	else		bRet = FALSE;	return bRet;}#endif/* If fastpath, adjust critical section, else trap to kernel for rescheduling *//*	@doc BOTH EXTERNAL		@func VOID | LeaveCriticalSection | Releases ownership of the specified critical 	section object. 	@parm LPCRITICAL_SECTION | lpcsCriticalSection | address of critical section object  	@comm Follows the Win32 reference description without restrictions or modifications. */VOID WINAPI LeaveCriticalSection(LPCRITICAL_SECTION lpcs) {HANDLE hTh = UCurThread();    volatile CRITICAL_SECTION *vpcs = lpcs;	/* Check for leave without enter */	DEBUGCHK(vpcs->OwnerThread == hTh);	if (vpcs->OwnerThread != hTh)		return;	if (vpcs->LockCount != 1)		vpcs->LockCount--; /* Simply decrement count if more than 1 */	else {		vpcs->OwnerThread = (HANDLE)((DWORD)hTh | 1);		if (vpcs->needtrap)			LeaveCritSec(lpcs);		else			InterlockedTestExchange((PLONG)&vpcs->OwnerThread, (DWORD)hTh | 1, 0L);	}}#ifdef ARM#pragma optimize("",on)#endif