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237 lines
6.7 KiB
C
237 lines
6.7 KiB
C
/*
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* Win32 'syslevel' routines
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*
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* Copyright 1998 Ulrich Weigand
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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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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#include <sys/types.h>
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#include "winternl.h"
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#include "syslevel.h"
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#include "stackframe.h"
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#include "wine/library.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(win32);
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static SYSLEVEL Win16Mutex = { CRITICAL_SECTION_INIT("Win16Mutex"), 1 };
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/* Global variable to save current TEB while in 16-bit code */
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WORD SYSLEVEL_Win16CurrentTeb = 0;
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/************************************************************************
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* GetpWin16Lock (KERNEL32.93)
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*/
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VOID WINAPI GetpWin16Lock(SYSLEVEL **lock)
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{
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*lock = &Win16Mutex;
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}
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/************************************************************************
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* GetpWin16Lock (KERNEL.449)
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*/
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SEGPTR WINAPI GetpWin16Lock16(void)
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{
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static SYSLEVEL *w16Mutex;
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static SEGPTR segpWin16Mutex;
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if (!segpWin16Mutex)
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{
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w16Mutex = &Win16Mutex;
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segpWin16Mutex = MapLS( &w16Mutex );
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}
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return segpWin16Mutex;
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}
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/************************************************************************
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* _CreateSysLevel (KERNEL.438)
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*/
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VOID WINAPI _CreateSysLevel(SYSLEVEL *lock, INT level)
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{
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InitializeCriticalSection( &lock->crst );
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lock->level = level;
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TRACE("(%p, %d): handle is %d\n",
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lock, level, lock->crst.LockSemaphore );
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}
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/************************************************************************
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* _EnterSysLevel (KERNEL32.97)
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* _EnterSysLevel (KERNEL.439)
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*/
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VOID WINAPI _EnterSysLevel(SYSLEVEL *lock)
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{
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TEB *teb = NtCurrentTeb();
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int i;
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TRACE("(%p, level %d): thread %p (fs %04x, pid %ld) count before %ld\n",
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lock, lock->level, teb->tid, teb->teb_sel, (long) getpid(),
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teb->sys_count[lock->level] );
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for ( i = 3; i > lock->level; i-- )
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if ( teb->sys_count[i] > 0 )
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{
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ERR("(%p, level %d): Holding %p, level %d. Expect deadlock!\n",
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lock, lock->level, teb->sys_mutex[i], i );
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}
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EnterCriticalSection( &lock->crst );
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teb->sys_count[lock->level]++;
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teb->sys_mutex[lock->level] = lock;
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TRACE("(%p, level %d): thread %p (fs %04x, pid %ld) count after %ld\n",
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lock, lock->level, teb->tid, teb->teb_sel, (long) getpid(),
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teb->sys_count[lock->level] );
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if (lock == &Win16Mutex)
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SYSLEVEL_Win16CurrentTeb = wine_get_fs();
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}
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/************************************************************************
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* _LeaveSysLevel (KERNEL32.98)
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* _LeaveSysLevel (KERNEL.440)
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*/
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VOID WINAPI _LeaveSysLevel(SYSLEVEL *lock)
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{
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TEB *teb = NtCurrentTeb();
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TRACE("(%p, level %d): thread %p (fs %04x, pid %ld) count before %ld\n",
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lock, lock->level, teb->tid, teb->teb_sel, (long) getpid(),
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teb->sys_count[lock->level] );
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if ( teb->sys_count[lock->level] <= 0 || teb->sys_mutex[lock->level] != lock )
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{
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ERR("(%p, level %d): Invalid state: count %ld mutex %p.\n",
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lock, lock->level, teb->sys_count[lock->level],
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teb->sys_mutex[lock->level] );
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}
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else
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{
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if ( --teb->sys_count[lock->level] == 0 )
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teb->sys_mutex[lock->level] = NULL;
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}
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LeaveCriticalSection( &lock->crst );
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TRACE("(%p, level %d): thread %p (fs %04x, pid %ld) count after %ld\n",
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lock, lock->level, teb->tid, teb->teb_sel, (long) getpid(),
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teb->sys_count[lock->level] );
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}
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/************************************************************************
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* @ (KERNEL32.86)
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*/
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VOID WINAPI _KERNEL32_86(SYSLEVEL *lock)
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{
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_LeaveSysLevel(lock);
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}
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/************************************************************************
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* _ConfirmSysLevel (KERNEL32.95)
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* _ConfirmSysLevel (KERNEL.436)
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*/
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DWORD WINAPI _ConfirmSysLevel(SYSLEVEL *lock)
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{
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if ( lock && lock->crst.OwningThread == (HANDLE)GetCurrentThreadId() )
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return lock->crst.RecursionCount;
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else
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return 0L;
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}
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/************************************************************************
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* _CheckNotSysLevel (KERNEL32.94)
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* _CheckNotSysLevel (KERNEL.437)
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*/
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VOID WINAPI _CheckNotSysLevel(SYSLEVEL *lock)
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{
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if (lock && lock->crst.OwningThread == (HANDLE)GetCurrentThreadId() &&
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lock->crst.RecursionCount)
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{
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ERR( "Holding lock %p level %d\n", lock, lock->level );
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DbgBreakPoint();
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}
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}
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/************************************************************************
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* _EnterWin16Lock [KERNEL.480]
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*/
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VOID WINAPI _EnterWin16Lock(void)
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{
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_EnterSysLevel(&Win16Mutex);
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}
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/************************************************************************
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* _LeaveWin16Lock [KERNEL.481]
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*/
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VOID WINAPI _LeaveWin16Lock(void)
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{
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_LeaveSysLevel(&Win16Mutex);
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}
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/************************************************************************
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* _ConfirmWin16Lock (KERNEL32.96)
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*/
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DWORD WINAPI _ConfirmWin16Lock(void)
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{
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return _ConfirmSysLevel(&Win16Mutex);
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}
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/************************************************************************
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* ReleaseThunkLock (KERNEL32.48)
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*/
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VOID WINAPI ReleaseThunkLock(DWORD *mutex_count)
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{
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DWORD count = _ConfirmSysLevel(&Win16Mutex);
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*mutex_count = count;
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while (count-- > 0)
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_LeaveSysLevel(&Win16Mutex);
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}
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/************************************************************************
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* RestoreThunkLock (KERNEL32.49)
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*/
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VOID WINAPI RestoreThunkLock(DWORD mutex_count)
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{
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while (mutex_count-- > 0)
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_EnterSysLevel(&Win16Mutex);
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}
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/************************************************************************
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* SYSLEVEL_CheckNotLevel
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*/
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VOID SYSLEVEL_CheckNotLevel( INT level )
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{
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INT i;
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for ( i = 3; i >= level; i-- )
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if ( NtCurrentTeb()->sys_count[i] > 0 )
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{
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ERR("(%d): Holding lock of level %d!\n",
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level, i );
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DbgBreakPoint();
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break;
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}
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}
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