dlls/krnl386.exe16/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 "kernel16_private.h"
  33 #include "wine/library.h"
  34 #include "wine/debug.h"
  35
  36 WINE_DEFAULT_DEBUG_CHANNEL(syslevel);
  37
  38 static SYSLEVEL Win16Mutex;
  39 static CRITICAL_SECTION_DEBUG critsect_debug =
  40 {
  41     0, 0, &Win16Mutex.crst,
  42     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  43       0, 0, { (DWORD_PTR)(__FILE__ ": Win16Mutex") }
  44 };
  45 static SYSLEVEL Win16Mutex = { { &critsect_debug, -1, 0, 0, 0, 0 }, 1 };
  46
  47
  48 /************************************************************************
  49  *           GetpWin16Lock    (KERNEL32.93)
  50  */
  51 VOID WINAPI GetpWin16Lock(SYSLEVEL **lock)
  52 {
  53     *lock = &Win16Mutex;
  54 }
  55
  56 /************************************************************************
  57  *           GetpWin16Lock    (KERNEL.449)
  58  */
  59 SEGPTR WINAPI GetpWin16Lock16(void)
  60 {
  61     static SYSLEVEL *w16Mutex;
  62     static SEGPTR segpWin16Mutex;
  63
  64     if (!segpWin16Mutex)
  65     {
  66         w16Mutex = &Win16Mutex;
  67         segpWin16Mutex = MapLS( &w16Mutex );
  68     }
  69     return segpWin16Mutex;
  70 }
  71
  72 /************************************************************************
  73  *           _CreateSysLevel    (KERNEL.438)
  74  */
  75 VOID WINAPI _CreateSysLevel(SYSLEVEL *lock, INT level)
  76 {
  77     RtlInitializeCriticalSection( &lock->crst );
  78     lock->level = level;
  79
  80     TRACE("(%p, %d): handle is %p\n",
  81                   lock, level, lock->crst.LockSemaphore );
  82 }
  83
  84 /************************************************************************
  85  *           _EnterSysLevel    (KERNEL32.97)
  86  *           _EnterSysLevel    (KERNEL.439)
  87  */
  88 VOID WINAPI _EnterSysLevel(SYSLEVEL *lock)
  89 {
  90     struct kernel_thread_data *thread_data = kernel_get_thread_data();
  91     int i;
  92
  93     TRACE("(%p, level %d): thread %x count before %d\n",
  94           lock, lock->level, GetCurrentThreadId(), thread_data->sys_count[lock->level] );
  95
  96     for ( i = 3; i > lock->level; i-- )
  97         if ( thread_data->sys_count[i] > 0 )
  98         {
  99             ERR("(%p, level %d): Holding %p, level %d. Expect deadlock!\n",
 100                         lock, lock->level, thread_data->sys_mutex[i], i );
 101         }
 102
 103     RtlEnterCriticalSection( &lock->crst );
 104
 105     thread_data->sys_count[lock->level]++;
 106     thread_data->sys_mutex[lock->level] = lock;
 107
 108     TRACE("(%p, level %d): thread %x count after  %d\n",
 109           lock, lock->level, GetCurrentThreadId(), thread_data->sys_count[lock->level] );
 110
 111     if (lock == &Win16Mutex) CallTo16_TebSelector = wine_get_fs();
 112 }
 113
 114 /************************************************************************
 115  *           _LeaveSysLevel    (KERNEL32.98)
 116  *           _LeaveSysLevel    (KERNEL.440)
 117  */
 118 VOID WINAPI _LeaveSysLevel(SYSLEVEL *lock)
 119 {
 120     struct kernel_thread_data *thread_data = kernel_get_thread_data();
 121
 122     TRACE("(%p, level %d): thread %x count before %d\n",
 123           lock, lock->level, GetCurrentThreadId(), thread_data->sys_count[lock->level] );
 124
 125     if ( thread_data->sys_count[lock->level] <= 0 || thread_data->sys_mutex[lock->level] != lock )
 126     {
 127         ERR("(%p, level %d): Invalid state: count %d mutex %p.\n",
 128                     lock, lock->level, thread_data->sys_count[lock->level],
 129                     thread_data->sys_mutex[lock->level] );
 130     }
 131     else
 132     {
 133         if ( --thread_data->sys_count[lock->level] == 0 )
 134             thread_data->sys_mutex[lock->level] = NULL;
 135     }
 136
 137     RtlLeaveCriticalSection( &lock->crst );
 138
 139     TRACE("(%p, level %d): thread %x count after  %d\n",
 140           lock, lock->level, GetCurrentThreadId(), thread_data->sys_count[lock->level] );
 141 }
 142
 143 /************************************************************************
 144  *              @ (KERNEL32.86)
 145  */
 146 VOID WINAPI _KERNEL32_86(SYSLEVEL *lock)
 147 {
 148     _LeaveSysLevel(lock);
 149 }
 150
 151 /************************************************************************
 152  *           _ConfirmSysLevel    (KERNEL32.95)
 153  *           _ConfirmSysLevel    (KERNEL.436)
 154  */
 155 DWORD WINAPI _ConfirmSysLevel(SYSLEVEL *lock)
 156 {
 157     if ( lock && lock->crst.OwningThread == ULongToHandle(GetCurrentThreadId()) )
 158         return lock->crst.RecursionCount;
 159     else
 160         return 0L;
 161 }
 162
 163 /************************************************************************
 164  *           _CheckNotSysLevel    (KERNEL32.94)
 165  *           _CheckNotSysLevel    (KERNEL.437)
 166  */
 167 VOID WINAPI _CheckNotSysLevel(SYSLEVEL *lock)
 168 {
 169     if (lock && lock->crst.OwningThread == ULongToHandle(GetCurrentThreadId()) &&
 170         lock->crst.RecursionCount)
 171     {
 172         ERR( "Holding lock %p level %d\n", lock, lock->level );
 173         DbgBreakPoint();
 174     }
 175 }
 176
 177
 178 /************************************************************************
 179  *           _EnterWin16Lock                    [KERNEL.480]
 180  */
 181 VOID WINAPI _EnterWin16Lock(void)
 182 {
 183     _EnterSysLevel(&Win16Mutex);
 184 }
 185
 186 /************************************************************************
 187  *           _LeaveWin16Lock            [KERNEL.481]
 188  */
 189 VOID WINAPI _LeaveWin16Lock(void)
 190 {
 191     _LeaveSysLevel(&Win16Mutex);
 192 }
 193
 194 /************************************************************************
 195  *           _ConfirmWin16Lock    (KERNEL32.96)
 196  */
 197 DWORD WINAPI _ConfirmWin16Lock(void)
 198 {
 199     return _ConfirmSysLevel(&Win16Mutex);
 200 }
 201
 202 /************************************************************************
 203  *           ReleaseThunkLock    (KERNEL32.48)
 204  */
 205 VOID WINAPI ReleaseThunkLock(DWORD *mutex_count)
 206 {
 207     DWORD count = _ConfirmSysLevel(&Win16Mutex);
 208     *mutex_count = count;
 209
 210     while (count-- > 0)
 211         _LeaveSysLevel(&Win16Mutex);
 212 }
 213
 214 /************************************************************************
 215  *           RestoreThunkLock    (KERNEL32.49)
 216  */
 217 VOID WINAPI RestoreThunkLock(DWORD mutex_count)
 218 {
 219     while (mutex_count-- > 0)
 220         _EnterSysLevel(&Win16Mutex);
 221 }
 222
 223 /************************************************************************
 224  *           SYSLEVEL_CheckNotLevel
 225  */
 226 VOID SYSLEVEL_CheckNotLevel( INT level )
 227 {
 228     INT i;
 229
 230     for ( i = 3; i >= level; i-- )
 231         if ( kernel_get_thread_data()->sys_count[i] > 0 )
 232         {
 233             ERR("(%d): Holding lock of level %d!\n",
 234                        level, i );
 235             DbgBreakPoint();
 236             break;
 237         }
 238 }