scheduler/syslevel.c

   1 /*
   2  * Win32 'syslevel' routines
   3  *
   4  * Copyright 1998 Ulrich Weigand
   5  *
   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.
  10  *
  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.
  15  *
  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
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdarg.h>
  24 #ifdef HAVE_UNISTD_H
  25 # include <unistd.h>
  26 #endif
  27 #include <sys/types.h>
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "winreg.h"
  31 #include "winternl.h"
  32 #include "wine/winbase16.h"
  33 #include "syslevel.h"
  34 #include "thread.h"
  35 #include "wine/library.h"
  36 #include "wine/debug.h"
  37
  38 WINE_DEFAULT_DEBUG_CHANNEL(win32);
  39
  40 static SYSLEVEL Win16Mutex;
  41 static CRITICAL_SECTION_DEBUG critsect_debug =
  42 {
  43     0, 0, &Win16Mutex.crst,
  44     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  45       0, 0, { 0, (DWORD)(__FILE__ ": Win16Mutex") }
  46 };
  47 static SYSLEVEL Win16Mutex = { { &critsect_debug, -1, 0, 0, 0, 0 }, 1 };
  48
  49 /* Global variable to save current TEB while in 16-bit code */
  50 WORD SYSLEVEL_Win16CurrentTeb = 0;
  51
  52
  53 /************************************************************************
  54  *           GetpWin16Lock    (KERNEL32.93)
  55  */
  56 VOID WINAPI GetpWin16Lock(SYSLEVEL **lock)
  57 {
  58     *lock = &Win16Mutex;
  59 }
  60
  61 /************************************************************************
  62  *           GetpWin16Lock    (KERNEL.449)
  63  */
  64 SEGPTR WINAPI GetpWin16Lock16(void)
  65 {
  66     static SYSLEVEL *w16Mutex;
  67     static SEGPTR segpWin16Mutex;
  68
  69     if (!segpWin16Mutex)
  70     {
  71         w16Mutex = &Win16Mutex;
  72         segpWin16Mutex = MapLS( &w16Mutex );
  73     }
  74     return segpWin16Mutex;
  75 }
  76
  77 /************************************************************************
  78  *           _CreateSysLevel    (KERNEL.438)
  79  */
  80 VOID WINAPI _CreateSysLevel(SYSLEVEL *lock, INT level)
  81 {
  82     RtlInitializeCriticalSection( &lock->crst );
  83     lock->level = level;
  84
  85     TRACE("(%p, %d): handle is %p\n",
  86                   lock, level, lock->crst.LockSemaphore );
  87 }
  88
  89 /************************************************************************
  90  *           _EnterSysLevel    (KERNEL32.97)
  91  *           _EnterSysLevel    (KERNEL.439)
  92  */
  93 VOID WINAPI _EnterSysLevel(SYSLEVEL *lock)
  94 {
  95     TEB *teb = NtCurrentTeb();
  96     int i;
  97
  98     TRACE("(%p, level %d): thread %lx count before %ld\n",
  99           lock, lock->level, GetCurrentThreadId(), teb->sys_count[lock->level] );
 100
 101     for ( i = 3; i > lock->level; i-- )
 102         if ( teb->sys_count[i] > 0 )
 103         {
 104             ERR("(%p, level %d): Holding %p, level %d. Expect deadlock!\n",
 105                         lock, lock->level, teb->sys_mutex[i], i );
 106         }
 107
 108     RtlEnterCriticalSection( &lock->crst );
 109
 110     teb->sys_count[lock->level]++;
 111     teb->sys_mutex[lock->level] = lock;
 112
 113     TRACE("(%p, level %d): thread %lx count after  %ld\n",
 114           lock, lock->level, GetCurrentThreadId(), teb->sys_count[lock->level] );
 115
 116     if (lock == &Win16Mutex)
 117         SYSLEVEL_Win16CurrentTeb = wine_get_fs();
 118 }
 119
 120 /************************************************************************
 121  *           _LeaveSysLevel    (KERNEL32.98)
 122  *           _LeaveSysLevel    (KERNEL.440)
 123  */
 124 VOID WINAPI _LeaveSysLevel(SYSLEVEL *lock)
 125 {
 126     TEB *teb = NtCurrentTeb();
 127
 128     TRACE("(%p, level %d): thread %lx count before %ld\n",
 129           lock, lock->level, GetCurrentThreadId(), teb->sys_count[lock->level] );
 130
 131     if ( teb->sys_count[lock->level] <= 0 || teb->sys_mutex[lock->level] != lock )
 132     {
 133         ERR("(%p, level %d): Invalid state: count %ld mutex %p.\n",
 134                     lock, lock->level, teb->sys_count[lock->level],
 135                     teb->sys_mutex[lock->level] );
 136     }
 137     else
 138     {
 139         if ( --teb->sys_count[lock->level] == 0 )
 140             teb->sys_mutex[lock->level] = NULL;
 141     }
 142
 143     RtlLeaveCriticalSection( &lock->crst );
 144
 145     TRACE("(%p, level %d): thread %lx count after  %ld\n",
 146           lock, lock->level, GetCurrentThreadId(), teb->sys_count[lock->level] );
 147 }
 148
 149 /************************************************************************
 150  *              @ (KERNEL32.86)
 151  */
 152 VOID WINAPI _KERNEL32_86(SYSLEVEL *lock)
 153 {
 154     _LeaveSysLevel(lock);
 155 }
 156
 157 /************************************************************************
 158  *           _ConfirmSysLevel    (KERNEL32.95)
 159  *           _ConfirmSysLevel    (KERNEL.436)
 160  */
 161 DWORD WINAPI _ConfirmSysLevel(SYSLEVEL *lock)
 162 {
 163     if ( lock && lock->crst.OwningThread == (HANDLE)GetCurrentThreadId() )
 164         return lock->crst.RecursionCount;
 165     else
 166         return 0L;
 167 }
 168
 169 /************************************************************************
 170  *           _CheckNotSysLevel    (KERNEL32.94)
 171  *           _CheckNotSysLevel    (KERNEL.437)
 172  */
 173 VOID WINAPI _CheckNotSysLevel(SYSLEVEL *lock)
 174 {
 175     if (lock && lock->crst.OwningThread == (HANDLE)GetCurrentThreadId() &&
 176         lock->crst.RecursionCount)
 177     {
 178         ERR( "Holding lock %p level %d\n", lock, lock->level );
 179         DbgBreakPoint();
 180     }
 181 }
 182
 183
 184 /************************************************************************
 185  *           _EnterWin16Lock                    [KERNEL.480]
 186  */
 187 VOID WINAPI _EnterWin16Lock(void)
 188 {
 189     _EnterSysLevel(&Win16Mutex);
 190 }
 191
 192 /************************************************************************
 193  *           _LeaveWin16Lock            [KERNEL.481]
 194  */
 195 VOID WINAPI _LeaveWin16Lock(void)
 196 {
 197     _LeaveSysLevel(&Win16Mutex);
 198 }
 199
 200 /************************************************************************
 201  *           _ConfirmWin16Lock    (KERNEL32.96)
 202  */
 203 DWORD WINAPI _ConfirmWin16Lock(void)
 204 {
 205     return _ConfirmSysLevel(&Win16Mutex);
 206 }
 207
 208 /************************************************************************
 209  *           ReleaseThunkLock    (KERNEL32.48)
 210  */
 211 VOID WINAPI ReleaseThunkLock(DWORD *mutex_count)
 212 {
 213     DWORD count = _ConfirmSysLevel(&Win16Mutex);
 214     *mutex_count = count;
 215
 216     while (count-- > 0)
 217         _LeaveSysLevel(&Win16Mutex);
 218 }
 219
 220 /************************************************************************
 221  *           RestoreThunkLock    (KERNEL32.49)
 222  */
 223 VOID WINAPI RestoreThunkLock(DWORD mutex_count)
 224 {
 225     while (mutex_count-- > 0)
 226         _EnterSysLevel(&Win16Mutex);
 227 }
 228
 229 /************************************************************************
 230  *           SYSLEVEL_CheckNotLevel
 231  */
 232 VOID SYSLEVEL_CheckNotLevel( INT level )
 233 {
 234     INT i;
 235
 236     for ( i = 3; i >= level; i-- )
 237         if ( NtCurrentTeb()->sys_count[i] > 0 )
 238         {
 239             ERR("(%d): Holding lock of level %d!\n",
 240                        level, i );
 241             DbgBreakPoint();
 242             break;
 243         }
 244 }