mono/metadata/w32mutex-win32.c

   1 /**
   2  * \file
   3  * Runtime support for managed Mutex on Win32
   4  *
   5  * Author:
   6  *      Ludovic Henry (luhenry@microsoft.com)
   7  *
   8  * Licensed under the MIT license. See LICENSE file in the project root for full license information.
   9  */
  10
  11 #include "w32mutex.h"
  12
  13 #include <windows.h>
  14 #include <winbase.h>
  15 #include <mono/metadata/handle.h>
  16 #include <mono/utils/mono-error-internals.h>
  17 #include "icall-decl.h"
  18
  19 void
  20 mono_w32mutex_init (void)
  21 {
  22 }
  23
  24 gpointer
  25 ves_icall_System_Threading_Mutex_CreateMutex_icall (MonoBoolean owned, const gunichar2 *name,
  26         gint32 name_length, MonoBoolean *created, MonoError *error)
  27 {
  28         HANDLE mutex;
  29
  30         *created = TRUE;
  31
  32         /* Need to blow away any old errors here, because code tests
  33          * for ERROR_ALREADY_EXISTS on success (!) to see if a mutex
  34          * was freshly created */
  35         SetLastError (ERROR_SUCCESS);
  36
  37         MONO_ENTER_GC_SAFE;
  38         mutex = CreateMutexW (NULL, owned, name);
  39         if (name && GetLastError () == ERROR_ALREADY_EXISTS)
  40                 *created = FALSE;
  41         MONO_EXIT_GC_SAFE;
  42
  43         return mutex;
  44 }
  45
  46 MonoBoolean
  47 ves_icall_System_Threading_Mutex_ReleaseMutex_internal (gpointer handle)
  48 {
  49         return ReleaseMutex (handle);
  50 }
  51
  52 gpointer
  53 ves_icall_System_Threading_Mutex_OpenMutex_icall (const gunichar2 *name, gint32 name_length,
  54         gint32 rights, gint32 *win32error, MonoError *error)
  55 {
  56         HANDLE ret;
  57
  58         *win32error = ERROR_SUCCESS;
  59
  60         MONO_ENTER_GC_SAFE;
  61         ret = OpenMutexW (rights, FALSE, name);
  62         if (!ret)
  63                 *win32error = GetLastError ();
  64         MONO_EXIT_GC_SAFE;
  65
  66         return ret;
  67 }