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ab687979fd
Use exported syslevel function wherever possible. Moved SEGPTR declaration to windef16.h.
209 lines
5.7 KiB
C
209 lines
5.7 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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#include <unistd.h>
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#include <sys/types.h>
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#include "ntddk.h"
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#include "syslevel.h"
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#include "heap.h"
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#include "selectors.h"
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#include "stackframe.h"
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#include "debugtools.h"
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DEFAULT_DEBUG_CHANNEL(win32);
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static SYSLEVEL Win16Mutex = { CRITICAL_SECTION_INIT, 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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* GetpWin16Lock16 (KERNEL.449)
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*/
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SEGPTR WINAPI GetpWin16Lock16(void)
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{
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static SEGPTR segpWin16Mutex;
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if (!segpWin16Mutex)
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{
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SYSLEVEL **w16Mutex = SEGPTR_ALLOC(sizeof(SYSLEVEL *));
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*w16Mutex = &Win16Mutex;
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segpWin16Mutex = SEGPTR_GET(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) (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 = __get_fs();
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}
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/************************************************************************
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* _LeaveSysLevel (KERNEL32.98) (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 (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) (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 == 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) (KERNEL.437)
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*/
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VOID WINAPI _CheckNotSysLevel(SYSLEVEL *lock)
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{
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FIXME("(%p)\n", lock);
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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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