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