2 * Win32 'syslevel' routines
4 * Copyright 1998 Ulrich Weigand
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 #include <sys/types.h>
32 #include "wine/winbase16.h"
34 #include "kernel_private.h"
35 #include "wine/library.h"
36 #include "wine/debug.h"
38 WINE_DEFAULT_DEBUG_CHANNEL(syslevel);
40 static SYSLEVEL Win16Mutex;
41 static CRITICAL_SECTION_DEBUG critsect_debug =
43 0, 0, &Win16Mutex.crst,
44 { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
45 0, 0, { 0, (DWORD)(__FILE__ ": Win16Mutex") }
47 static SYSLEVEL Win16Mutex = { { &critsect_debug, -1, 0, 0, 0, 0 }, 1 };
50 extern unsigned int CallTo16_TebSelector;
54 /************************************************************************
55 * GetpWin16Lock (KERNEL32.93)
57 VOID WINAPI GetpWin16Lock(SYSLEVEL **lock)
62 /************************************************************************
63 * GetpWin16Lock (KERNEL.449)
65 SEGPTR WINAPI GetpWin16Lock16(void)
67 static SYSLEVEL *w16Mutex;
68 static SEGPTR segpWin16Mutex;
72 w16Mutex = &Win16Mutex;
73 segpWin16Mutex = MapLS( &w16Mutex );
75 return segpWin16Mutex;
78 /************************************************************************
79 * _CreateSysLevel (KERNEL.438)
81 VOID WINAPI _CreateSysLevel(SYSLEVEL *lock, INT level)
83 RtlInitializeCriticalSection( &lock->crst );
86 TRACE("(%p, %d): handle is %p\n",
87 lock, level, lock->crst.LockSemaphore );
90 /************************************************************************
91 * _EnterSysLevel (KERNEL32.97)
92 * _EnterSysLevel (KERNEL.439)
94 VOID WINAPI _EnterSysLevel(SYSLEVEL *lock)
96 TEB *teb = NtCurrentTeb();
99 TRACE("(%p, level %d): thread %lx count before %ld\n",
100 lock, lock->level, GetCurrentThreadId(), teb->sys_count[lock->level] );
102 for ( i = 3; i > lock->level; i-- )
103 if ( teb->sys_count[i] > 0 )
105 ERR("(%p, level %d): Holding %p, level %d. Expect deadlock!\n",
106 lock, lock->level, teb->sys_mutex[i], i );
109 RtlEnterCriticalSection( &lock->crst );
111 teb->sys_count[lock->level]++;
112 teb->sys_mutex[lock->level] = lock;
114 TRACE("(%p, level %d): thread %lx count after %ld\n",
115 lock, lock->level, GetCurrentThreadId(), teb->sys_count[lock->level] );
118 if (lock == &Win16Mutex) CallTo16_TebSelector = wine_get_fs();
122 /************************************************************************
123 * _LeaveSysLevel (KERNEL32.98)
124 * _LeaveSysLevel (KERNEL.440)
126 VOID WINAPI _LeaveSysLevel(SYSLEVEL *lock)
128 TEB *teb = NtCurrentTeb();
130 TRACE("(%p, level %d): thread %lx count before %ld\n",
131 lock, lock->level, GetCurrentThreadId(), teb->sys_count[lock->level] );
133 if ( teb->sys_count[lock->level] <= 0 || teb->sys_mutex[lock->level] != lock )
135 ERR("(%p, level %d): Invalid state: count %ld mutex %p.\n",
136 lock, lock->level, teb->sys_count[lock->level],
137 teb->sys_mutex[lock->level] );
141 if ( --teb->sys_count[lock->level] == 0 )
142 teb->sys_mutex[lock->level] = NULL;
145 RtlLeaveCriticalSection( &lock->crst );
147 TRACE("(%p, level %d): thread %lx count after %ld\n",
148 lock, lock->level, GetCurrentThreadId(), teb->sys_count[lock->level] );
151 /************************************************************************
154 VOID WINAPI _KERNEL32_86(SYSLEVEL *lock)
156 _LeaveSysLevel(lock);
159 /************************************************************************
160 * _ConfirmSysLevel (KERNEL32.95)
161 * _ConfirmSysLevel (KERNEL.436)
163 DWORD WINAPI _ConfirmSysLevel(SYSLEVEL *lock)
165 if ( lock && lock->crst.OwningThread == (HANDLE)GetCurrentThreadId() )
166 return lock->crst.RecursionCount;
171 /************************************************************************
172 * _CheckNotSysLevel (KERNEL32.94)
173 * _CheckNotSysLevel (KERNEL.437)
175 VOID WINAPI _CheckNotSysLevel(SYSLEVEL *lock)
177 if (lock && lock->crst.OwningThread == (HANDLE)GetCurrentThreadId() &&
178 lock->crst.RecursionCount)
180 ERR( "Holding lock %p level %d\n", lock, lock->level );
186 /************************************************************************
187 * _EnterWin16Lock [KERNEL.480]
189 VOID WINAPI _EnterWin16Lock(void)
191 _EnterSysLevel(&Win16Mutex);
194 /************************************************************************
195 * _LeaveWin16Lock [KERNEL.481]
197 VOID WINAPI _LeaveWin16Lock(void)
199 _LeaveSysLevel(&Win16Mutex);
202 /************************************************************************
203 * _ConfirmWin16Lock (KERNEL32.96)
205 DWORD WINAPI _ConfirmWin16Lock(void)
207 return _ConfirmSysLevel(&Win16Mutex);
210 /************************************************************************
211 * ReleaseThunkLock (KERNEL32.48)
213 VOID WINAPI ReleaseThunkLock(DWORD *mutex_count)
215 DWORD count = _ConfirmSysLevel(&Win16Mutex);
216 *mutex_count = count;
219 _LeaveSysLevel(&Win16Mutex);
222 /************************************************************************
223 * RestoreThunkLock (KERNEL32.49)
225 VOID WINAPI RestoreThunkLock(DWORD mutex_count)
227 while (mutex_count-- > 0)
228 _EnterSysLevel(&Win16Mutex);
231 /************************************************************************
232 * SYSLEVEL_CheckNotLevel
234 VOID SYSLEVEL_CheckNotLevel( INT level )
238 for ( i = 3; i >= level; i-- )
239 if ( NtCurrentTeb()->sys_count[i] > 0 )
241 ERR("(%d): Holding lock of level %d!\n",