dlls/kernel32/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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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 "winternl.h"
  31 #include "wine/winbase16.h"
  32 #include "kernel_private.h"
  33 #include "kernel16_private.h"
  34 #include "wine/library.h"
  35 #include "wine/debug.h"
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(syslevel);
  38
  39 static SYSLEVEL Win16Mutex;
  40 static CRITICAL_SECTION_DEBUG critsect_debug =
  41 {
  42     0, 0, &Win16Mutex.crst,
  43     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  44       0, 0, { (DWORD_PTR)(__FILE__ ": Win16Mutex") }
  45 };
  46 static SYSLEVEL Win16Mutex = { { &critsect_debug, -1, 0, 0, 0, 0 }, 1 };
  47
  48
  49 /************************************************************************
  50  *           GetpWin16Lock    (KERNEL32.93)
  51  */
  52 VOID WINAPI GetpWin16Lock(SYSLEVEL **lock)
  53 {
  54     *lock = &Win16Mutex;
  55 }
  56
  57 /************************************************************************
  58  *           GetpWin16Lock    (KERNEL.449)
  59  */
  60 SEGPTR WINAPI GetpWin16Lock16(void)
  61 {
  62     static SYSLEVEL *w16Mutex;
  63     static SEGPTR segpWin16Mutex;
  64
  65     if (!segpWin16Mutex)
  66     {
  67         w16Mutex = &Win16Mutex;
  68         segpWin16Mutex = MapLS( &w16Mutex );
  69     }
  70     return segpWin16Mutex;
  71 }
  72
  73 /************************************************************************
  74  *           _CreateSysLevel    (KERNEL.438)
  75  */
  76 VOID WINAPI _CreateSysLevel(SYSLEVEL *lock, INT level)
  77 {
  78     RtlInitializeCriticalSection( &lock->crst );
  79     lock->level = level;
  80
  81     TRACE("(%p, %d): handle is %p\n",
  82                   lock, level, lock->crst.LockSemaphore );
  83 }
  84
  85 /************************************************************************
  86  *           _EnterSysLevel    (KERNEL32.97)
  87  *           _EnterSysLevel    (KERNEL.439)
  88  */
  89 VOID WINAPI _EnterSysLevel(SYSLEVEL *lock)
  90 {
  91     struct kernel_thread_data *thread_data = kernel_get_thread_data();
  92     int i;
  93
  94     TRACE("(%p, level %d): thread %x count before %d\n",
  95           lock, lock->level, GetCurrentThreadId(), thread_data->sys_count[lock->level] );
  96
  97     for ( i = 3; i > lock->level; i-- )
  98         if ( thread_data->sys_count[i] > 0 )
  99         {
 100             ERR("(%p, level %d): Holding %p, level %d. Expect deadlock!\n",
 101                         lock, lock->level, thread_data->sys_mutex[i], i );
 102         }
 103
 104     RtlEnterCriticalSection( &lock->crst );
 105
 106     thread_data->sys_count[lock->level]++;
 107     thread_data->sys_mutex[lock->level] = lock;
 108
 109     TRACE("(%p, level %d): thread %x count after  %d\n",
 110           lock, lock->level, GetCurrentThreadId(), thread_data->sys_count[lock->level] );
 111
 112 #ifdef __i386__
 113     if (lock == &Win16Mutex) CallTo16_TebSelector = wine_get_fs();
 114 #endif
 115 }
 116
 117 /************************************************************************
 118  *           _LeaveSysLevel    (KERNEL32.98)
 119  *           _LeaveSysLevel    (KERNEL.440)
 120  */
 121 VOID WINAPI _LeaveSysLevel(SYSLEVEL *lock)
 122 {
 123     struct kernel_thread_data *thread_data = kernel_get_thread_data();
 124
 125     TRACE("(%p, level %d): thread %x count before %d\n",
 126           lock, lock->level, GetCurrentThreadId(), thread_data->sys_count[lock->level] );
 127
 128     if ( thread_data->sys_count[lock->level] <= 0 || thread_data->sys_mutex[lock->level] != lock )
 129     {
 130         ERR("(%p, level %d): Invalid state: count %d mutex %p.\n",
 131                     lock, lock->level, thread_data->sys_count[lock->level],
 132                     thread_data->sys_mutex[lock->level] );
 133     }
 134     else
 135     {
 136         if ( --thread_data->sys_count[lock->level] == 0 )
 137             thread_data->sys_mutex[lock->level] = NULL;
 138     }
 139
 140     RtlLeaveCriticalSection( &lock->crst );
 141
 142     TRACE("(%p, level %d): thread %x count after  %d\n",
 143           lock, lock->level, GetCurrentThreadId(), thread_data->sys_count[lock->level] );
 144 }
 145
 146 /************************************************************************
 147  *              @ (KERNEL32.86)
 148  */
 149 VOID WINAPI _KERNEL32_86(SYSLEVEL *lock)
 150 {
 151     _LeaveSysLevel(lock);
 152 }
 153
 154 /************************************************************************
 155  *           _ConfirmSysLevel    (KERNEL32.95)
 156  *           _ConfirmSysLevel    (KERNEL.436)
 157  */
 158 DWORD WINAPI _ConfirmSysLevel(SYSLEVEL *lock)
 159 {
 160     if ( lock && lock->crst.OwningThread == (HANDLE)GetCurrentThreadId() )
 161         return lock->crst.RecursionCount;
 162     else
 163         return 0L;
 164 }
 165
 166 /************************************************************************
 167  *           _CheckNotSysLevel    (KERNEL32.94)
 168  *           _CheckNotSysLevel    (KERNEL.437)
 169  */
 170 VOID WINAPI _CheckNotSysLevel(SYSLEVEL *lock)
 171 {
 172     if (lock && lock->crst.OwningThread == (HANDLE)GetCurrentThreadId() &&
 173         lock->crst.RecursionCount)
 174     {
 175         ERR( "Holding lock %p level %d\n", lock, lock->level );
 176         DbgBreakPoint();
 177     }
 178 }
 179
 180
 181 /************************************************************************
 182  *           _EnterWin16Lock                    [KERNEL.480]
 183  */
 184 VOID WINAPI _EnterWin16Lock(void)
 185 {
 186     _EnterSysLevel(&Win16Mutex);
 187 }
 188
 189 /************************************************************************
 190  *           _LeaveWin16Lock            [KERNEL.481]
 191  */
 192 VOID WINAPI _LeaveWin16Lock(void)
 193 {
 194     _LeaveSysLevel(&Win16Mutex);
 195 }
 196
 197 /************************************************************************
 198  *           _ConfirmWin16Lock    (KERNEL32.96)
 199  */
 200 DWORD WINAPI _ConfirmWin16Lock(void)
 201 {
 202     return _ConfirmSysLevel(&Win16Mutex);
 203 }
 204
 205 /************************************************************************
 206  *           ReleaseThunkLock    (KERNEL32.48)
 207  */
 208 VOID WINAPI ReleaseThunkLock(DWORD *mutex_count)
 209 {
 210     DWORD count = _ConfirmSysLevel(&Win16Mutex);
 211     *mutex_count = count;
 212
 213     while (count-- > 0)
 214         _LeaveSysLevel(&Win16Mutex);
 215 }
 216
 217 /************************************************************************
 218  *           RestoreThunkLock    (KERNEL32.49)
 219  */
 220 VOID WINAPI RestoreThunkLock(DWORD mutex_count)
 221 {
 222     while (mutex_count-- > 0)
 223         _EnterSysLevel(&Win16Mutex);
 224 }
 225
 226 /************************************************************************
 227  *           SYSLEVEL_CheckNotLevel
 228  */
 229 VOID SYSLEVEL_CheckNotLevel( INT level )
 230 {
 231     INT i;
 232
 233     for ( i = 3; i >= level; i-- )
 234         if ( kernel_get_thread_data()->sys_count[i] > 0 )
 235         {
 236             ERR("(%d): Holding lock of level %d!\n",
 237                        level, i );
 238             DbgBreakPoint();
 239             break;
 240         }
 241 }