Sweden-Number/scheduler/critsection.c

197 lines
6.3 KiB
C

/*
* Win32 critical sections
*
* Copyright 1998 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <sys/types.h>
#include "winerror.h"
#include "winbase.h"
#include "ntddk.h"
#include "wine/debug.h"
#include "thread.h"
WINE_DEFAULT_DEBUG_CHANNEL(win32);
WINE_DECLARE_DEBUG_CHANNEL(relay);
/***********************************************************************
* InitializeCriticalSection (KERNEL32.@)
*/
void WINAPI InitializeCriticalSection( CRITICAL_SECTION *crit )
{
NTSTATUS ret = RtlInitializeCriticalSection( crit );
if (ret) RtlRaiseStatus( ret );
}
/***********************************************************************
* InitializeCriticalSectionAndSpinCount (KERNEL32.@)
*/
BOOL WINAPI InitializeCriticalSectionAndSpinCount( CRITICAL_SECTION *crit, DWORD spincount )
{
NTSTATUS ret = RtlInitializeCriticalSectionAndSpinCount( crit, spincount );
if (ret) RtlRaiseStatus( ret );
return !ret;
}
/***********************************************************************
* SetCriticalSectionSpinCount (KERNEL32.@)
* This function is available on NT4SP3 or later, but not Win98
* It is SMP related
*/
DWORD WINAPI SetCriticalSectionSpinCount( CRITICAL_SECTION *crit, DWORD spincount )
{
ULONG_PTR oldspincount = crit->SpinCount;
if(spincount) FIXME("critsection=%p: spincount=%ld not supported\n", crit, spincount);
crit->SpinCount = spincount;
return oldspincount;
}
/***********************************************************************
* MakeCriticalSectionGlobal (KERNEL32.@)
*/
void WINAPI MakeCriticalSectionGlobal( CRITICAL_SECTION *crit )
{
/* let's assume that only one thread at a time will try to do this */
HANDLE sem = crit->LockSemaphore;
if (!sem) NtCreateSemaphore( &sem, SEMAPHORE_ALL_ACCESS, NULL, 0, 1 );
crit->LockSemaphore = ConvertToGlobalHandle( sem );
}
/***********************************************************************
* ReinitializeCriticalSection (KERNEL32.@)
*/
void WINAPI ReinitializeCriticalSection( CRITICAL_SECTION *crit )
{
if ( !crit->LockSemaphore )
RtlInitializeCriticalSection( crit );
}
/***********************************************************************
* UninitializeCriticalSection (KERNEL32.@)
*/
void WINAPI UninitializeCriticalSection( CRITICAL_SECTION *crit )
{
RtlDeleteCriticalSection( crit );
}
#ifdef __i386__
/***********************************************************************
* InterlockedCompareExchange (KERNEL32.@)
*/
/* LONG WINAPI InterlockedCompareExchange( PLONG dest, LONG xchg, LONG compare ); */
__ASM_GLOBAL_FUNC(InterlockedCompareExchange,
"movl 12(%esp),%eax\n\t"
"movl 8(%esp),%ecx\n\t"
"movl 4(%esp),%edx\n\t"
"lock; cmpxchgl %ecx,(%edx)\n\t"
"ret $12");
/***********************************************************************
* InterlockedExchange (KERNEL32.@)
*/
/* LONG WINAPI InterlockedExchange( PLONG dest, LONG val ); */
__ASM_GLOBAL_FUNC(InterlockedExchange,
"movl 8(%esp),%eax\n\t"
"movl 4(%esp),%edx\n\t"
"lock; xchgl %eax,(%edx)\n\t"
"ret $8");
/***********************************************************************
* InterlockedExchangeAdd (KERNEL32.@)
*/
/* LONG WINAPI InterlockedExchangeAdd( PLONG dest, LONG incr ); */
__ASM_GLOBAL_FUNC(InterlockedExchangeAdd,
"movl 8(%esp),%eax\n\t"
"movl 4(%esp),%edx\n\t"
"lock; xaddl %eax,(%edx)\n\t"
"ret $8");
/***********************************************************************
* InterlockedIncrement (KERNEL32.@)
*/
/* LONG WINAPI InterlockedIncrement( PLONG dest ); */
__ASM_GLOBAL_FUNC(InterlockedIncrement,
"movl 4(%esp),%edx\n\t"
"movl $1,%eax\n\t"
"lock; xaddl %eax,(%edx)\n\t"
"incl %eax\n\t"
"ret $4");
/***********************************************************************
* InterlockedDecrement (KERNEL32.@)
*/
__ASM_GLOBAL_FUNC(InterlockedDecrement,
"movl 4(%esp),%edx\n\t"
"movl $-1,%eax\n\t"
"lock; xaddl %eax,(%edx)\n\t"
"decl %eax\n\t"
"ret $4");
#else /* __i386__ */
/***********************************************************************
* InterlockedCompareExchange (KERNEL32.@)
*/
LONG WINAPI InterlockedCompareExchange( PLONG dest, LONG xchg, LONG compare )
{
return interlocked_cmpxchg( dest, xchg, compare );
}
/***********************************************************************
* InterlockedExchange (KERNEL32.@)
*/
LONG WINAPI InterlockedExchange( PLONG dest, LONG val )
{
return interlocked_xchg( dest, val );
}
/***********************************************************************
* InterlockedExchangeAdd (KERNEL32.@)
*/
LONG WINAPI InterlockedExchangeAdd( PLONG dest, LONG incr )
{
return interlocked_xchg_add( dest, incr );
}
/***********************************************************************
* InterlockedIncrement (KERNEL32.@)
*/
LONG WINAPI InterlockedIncrement( PLONG dest )
{
return interlocked_xchg_add( dest, 1 ) + 1;
}
/***********************************************************************
* InterlockedDecrement (KERNEL32.@)
*/
LONG WINAPI InterlockedDecrement( PLONG dest )
{
return interlocked_xchg_add( dest, -1 ) - 1;
}
#endif /* __i386__ */