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(win32);
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;
51 extern void __wine_set_signal_fs( unsigned int fs );
55 /************************************************************************
56 * GetpWin16Lock (KERNEL32.93)
58 VOID WINAPI GetpWin16Lock(SYSLEVEL **lock)
63 /************************************************************************
64 * GetpWin16Lock (KERNEL.449)
66 SEGPTR WINAPI GetpWin16Lock16(void)
68 static SYSLEVEL *w16Mutex;
69 static SEGPTR segpWin16Mutex;
73 w16Mutex = &Win16Mutex;
74 segpWin16Mutex = MapLS( &w16Mutex );
76 return segpWin16Mutex;
79 /************************************************************************
80 * _CreateSysLevel (KERNEL.438)
82 VOID WINAPI _CreateSysLevel(SYSLEVEL *lock, INT level)
84 RtlInitializeCriticalSection( &lock->crst );
87 TRACE("(%p, %d): handle is %p\n",
88 lock, level, lock->crst.LockSemaphore );
91 /************************************************************************
92 * _EnterSysLevel (KERNEL32.97)
93 * _EnterSysLevel (KERNEL.439)
95 VOID WINAPI _EnterSysLevel(SYSLEVEL *lock)
97 TEB *teb = NtCurrentTeb();
100 TRACE("(%p, level %d): thread %lx count before %ld\n",
101 lock, lock->level, GetCurrentThreadId(), teb->sys_count[lock->level] );
103 for ( i = 3; i > lock->level; i-- )
104 if ( teb->sys_count[i] > 0 )
106 ERR("(%p, level %d): Holding %p, level %d. Expect deadlock!\n",
107 lock, lock->level, teb->sys_mutex[i], i );
110 RtlEnterCriticalSection( &lock->crst );
112 teb->sys_count[lock->level]++;
113 teb->sys_mutex[lock->level] = lock;
115 TRACE("(%p, level %d): thread %lx count after %ld\n",
116 lock, lock->level, GetCurrentThreadId(), teb->sys_count[lock->level] );
119 if (lock == &Win16Mutex)
121 __wine_set_signal_fs( wine_get_fs() );
122 CallTo16_TebSelector = wine_get_fs();
127 /************************************************************************
128 * _LeaveSysLevel (KERNEL32.98)
129 * _LeaveSysLevel (KERNEL.440)
131 VOID WINAPI _LeaveSysLevel(SYSLEVEL *lock)
133 TEB *teb = NtCurrentTeb();
135 TRACE("(%p, level %d): thread %lx count before %ld\n",
136 lock, lock->level, GetCurrentThreadId(), teb->sys_count[lock->level] );
138 if ( teb->sys_count[lock->level] <= 0 || teb->sys_mutex[lock->level] != lock )
140 ERR("(%p, level %d): Invalid state: count %ld mutex %p.\n",
141 lock, lock->level, teb->sys_count[lock->level],
142 teb->sys_mutex[lock->level] );
146 if ( --teb->sys_count[lock->level] == 0 )
147 teb->sys_mutex[lock->level] = NULL;
150 RtlLeaveCriticalSection( &lock->crst );
152 TRACE("(%p, level %d): thread %lx count after %ld\n",
153 lock, lock->level, GetCurrentThreadId(), teb->sys_count[lock->level] );
156 /************************************************************************
159 VOID WINAPI _KERNEL32_86(SYSLEVEL *lock)
161 _LeaveSysLevel(lock);
164 /************************************************************************
165 * _ConfirmSysLevel (KERNEL32.95)
166 * _ConfirmSysLevel (KERNEL.436)
168 DWORD WINAPI _ConfirmSysLevel(SYSLEVEL *lock)
170 if ( lock && lock->crst.OwningThread == (HANDLE)GetCurrentThreadId() )
171 return lock->crst.RecursionCount;
176 /************************************************************************
177 * _CheckNotSysLevel (KERNEL32.94)
178 * _CheckNotSysLevel (KERNEL.437)
180 VOID WINAPI _CheckNotSysLevel(SYSLEVEL *lock)
182 if (lock && lock->crst.OwningThread == (HANDLE)GetCurrentThreadId() &&
183 lock->crst.RecursionCount)
185 ERR( "Holding lock %p level %d\n", lock, lock->level );
191 /************************************************************************
192 * _EnterWin16Lock [KERNEL.480]
194 VOID WINAPI _EnterWin16Lock(void)
196 _EnterSysLevel(&Win16Mutex);
199 /************************************************************************
200 * _LeaveWin16Lock [KERNEL.481]
202 VOID WINAPI _LeaveWin16Lock(void)
204 _LeaveSysLevel(&Win16Mutex);
207 /************************************************************************
208 * _ConfirmWin16Lock (KERNEL32.96)
210 DWORD WINAPI _ConfirmWin16Lock(void)
212 return _ConfirmSysLevel(&Win16Mutex);
215 /************************************************************************
216 * ReleaseThunkLock (KERNEL32.48)
218 VOID WINAPI ReleaseThunkLock(DWORD *mutex_count)
220 DWORD count = _ConfirmSysLevel(&Win16Mutex);
221 *mutex_count = count;
224 _LeaveSysLevel(&Win16Mutex);
227 /************************************************************************
228 * RestoreThunkLock (KERNEL32.49)
230 VOID WINAPI RestoreThunkLock(DWORD mutex_count)
232 while (mutex_count-- > 0)
233 _EnterSysLevel(&Win16Mutex);
236 /************************************************************************
237 * SYSLEVEL_CheckNotLevel
239 VOID SYSLEVEL_CheckNotLevel( INT level )
243 for ( i = 3; i >= level; i-- )
244 if ( NtCurrentTeb()->sys_count[i] > 0 )
246 ERR("(%d): Holding lock of level %d!\n",