/* * Win32 'syslevel' routines * * Copyright 1998 Ulrich Weigand * * 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA */ #include "config.h" #include <stdarg.h> #ifdef HAVE_UNISTD_H # include <unistd.h> #endif #include <sys/types.h> #include "windef.h" #include "winbase.h" #include "winternl.h" #include "wine/winbase16.h" #include "kernel16_private.h" #include "wine/library.h" #include "wine/debug.h" WINE_DEFAULT_DEBUG_CHANNEL(syslevel); static SYSLEVEL Win16Mutex; static CRITICAL_SECTION_DEBUG critsect_debug = { 0, 0, &Win16Mutex.crst, { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList }, 0, 0, { (DWORD_PTR)(__FILE__ ": Win16Mutex") } }; static SYSLEVEL Win16Mutex = { { &critsect_debug, -1, 0, 0, 0, 0 }, 1 }; /************************************************************************ * GetpWin16Lock (KERNEL32.93) */ VOID WINAPI GetpWin16Lock(SYSLEVEL **lock) { *lock = &Win16Mutex; } /************************************************************************ * GetpWin16Lock (KERNEL.449) */ SEGPTR WINAPI GetpWin16Lock16(void) { static SYSLEVEL *w16Mutex; static SEGPTR segpWin16Mutex; if (!segpWin16Mutex) { w16Mutex = &Win16Mutex; segpWin16Mutex = MapLS( &w16Mutex ); } return segpWin16Mutex; } /************************************************************************ * _CreateSysLevel (KERNEL.438) */ VOID WINAPI _CreateSysLevel(SYSLEVEL *lock, INT level) { RtlInitializeCriticalSection( &lock->crst ); lock->level = level; TRACE("(%p, %d): handle is %p\n", lock, level, lock->crst.LockSemaphore ); } /************************************************************************ * _EnterSysLevel (KERNEL32.97) * _EnterSysLevel (KERNEL.439) */ VOID WINAPI _EnterSysLevel(SYSLEVEL *lock) { struct kernel_thread_data *thread_data = kernel_get_thread_data(); int i; TRACE("(%p, level %d): thread %x count before %d\n", lock, lock->level, GetCurrentThreadId(), thread_data->sys_count[lock->level] ); for ( i = 3; i > lock->level; i-- ) if ( thread_data->sys_count[i] > 0 ) { ERR("(%p, level %d): Holding %p, level %d. Expect deadlock!\n", lock, lock->level, thread_data->sys_mutex[i], i ); } RtlEnterCriticalSection( &lock->crst ); thread_data->sys_count[lock->level]++; thread_data->sys_mutex[lock->level] = lock; TRACE("(%p, level %d): thread %x count after %d\n", lock, lock->level, GetCurrentThreadId(), thread_data->sys_count[lock->level] ); if (lock == &Win16Mutex) CallTo16_TebSelector = wine_get_fs(); } /************************************************************************ * _LeaveSysLevel (KERNEL32.98) * _LeaveSysLevel (KERNEL.440) */ VOID WINAPI _LeaveSysLevel(SYSLEVEL *lock) { struct kernel_thread_data *thread_data = kernel_get_thread_data(); TRACE("(%p, level %d): thread %x count before %d\n", lock, lock->level, GetCurrentThreadId(), thread_data->sys_count[lock->level] ); if ( thread_data->sys_count[lock->level] <= 0 || thread_data->sys_mutex[lock->level] != lock ) { ERR("(%p, level %d): Invalid state: count %d mutex %p.\n", lock, lock->level, thread_data->sys_count[lock->level], thread_data->sys_mutex[lock->level] ); } else { if ( --thread_data->sys_count[lock->level] == 0 ) thread_data->sys_mutex[lock->level] = NULL; } RtlLeaveCriticalSection( &lock->crst ); TRACE("(%p, level %d): thread %x count after %d\n", lock, lock->level, GetCurrentThreadId(), thread_data->sys_count[lock->level] ); } /************************************************************************ * @ (KERNEL32.86) */ VOID WINAPI _KERNEL32_86(SYSLEVEL *lock) { _LeaveSysLevel(lock); } /************************************************************************ * _ConfirmSysLevel (KERNEL32.95) * _ConfirmSysLevel (KERNEL.436) */ DWORD WINAPI _ConfirmSysLevel(SYSLEVEL *lock) { if ( lock && lock->crst.OwningThread == ULongToHandle(GetCurrentThreadId()) ) return lock->crst.RecursionCount; else return 0L; } /************************************************************************ * _CheckNotSysLevel (KERNEL32.94) * _CheckNotSysLevel (KERNEL.437) */ VOID WINAPI _CheckNotSysLevel(SYSLEVEL *lock) { if (lock && lock->crst.OwningThread == ULongToHandle(GetCurrentThreadId()) && lock->crst.RecursionCount) { ERR( "Holding lock %p level %d\n", lock, lock->level ); DbgBreakPoint(); } } /************************************************************************ * _EnterWin16Lock [KERNEL.480] */ VOID WINAPI _EnterWin16Lock(void) { _EnterSysLevel(&Win16Mutex); } /************************************************************************ * _LeaveWin16Lock [KERNEL.481] */ VOID WINAPI _LeaveWin16Lock(void) { _LeaveSysLevel(&Win16Mutex); } /************************************************************************ * _ConfirmWin16Lock (KERNEL32.96) */ DWORD WINAPI _ConfirmWin16Lock(void) { return _ConfirmSysLevel(&Win16Mutex); } /************************************************************************ * ReleaseThunkLock (KERNEL32.48) */ VOID WINAPI ReleaseThunkLock(DWORD *mutex_count) { DWORD count = _ConfirmSysLevel(&Win16Mutex); *mutex_count = count; while (count-- > 0) _LeaveSysLevel(&Win16Mutex); } /************************************************************************ * RestoreThunkLock (KERNEL32.49) */ VOID WINAPI RestoreThunkLock(DWORD mutex_count) { while (mutex_count-- > 0) _EnterSysLevel(&Win16Mutex); } /************************************************************************ * SYSLEVEL_CheckNotLevel */ VOID SYSLEVEL_CheckNotLevel( INT level ) { INT i; for ( i = 3; i >= level; i-- ) if ( kernel_get_thread_data()->sys_count[i] > 0 ) { ERR("(%d): Holding lock of level %d!\n", level, i ); DbgBreakPoint(); break; } }