reactos/lib/kernel32/synch/mutex.c

   1 /* $Id: mutex.c,v 1.5 2003/01/15 21:24:36 chorns Exp $
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS system libraries
   5  * FILE:            lib/kernel32/synch/mutex.c
   6  * PURPOSE:         Mutex functions
   7  * PROGRAMMER:      Eric Kohl (ekohl@rz-online.de)
   8  * UPDATE HISTORY:
   9  *                  Created 01/20/2001
  10  */
  11
  12 /* INCLUDES *****************************************************************/
  13
  14 #include <k32.h>
  15
  16 #define NDEBUG
  17 #include <kernel32/kernel32.h>
  18
  19 /* FUNCTIONS *****************************************************************/
  20
  21 HANDLE STDCALL
  22 CreateMutexA(LPSECURITY_ATTRIBUTES lpMutexAttributes,
  23              WINBOOL bInitialOwner,
  24              LPCSTR lpName)
  25 {
  26    UNICODE_STRING NameU;
  27    ANSI_STRING Name;
  28    HANDLE Handle;
  29
  30    RtlInitAnsiString(&Name,
  31                      (LPSTR)lpName);
  32    RtlAnsiStringToUnicodeString(&NameU,
  33                                 &Name,
  34                                 TRUE);
  35
  36    Handle = CreateMutexW(lpMutexAttributes,
  37                          bInitialOwner,
  38                          NameU.Buffer);
  39
  40    RtlFreeUnicodeString(&NameU);
  41
  42    return Handle;
  43 }
  44
  45
  46 HANDLE STDCALL
  47 CreateMutexW(LPSECURITY_ATTRIBUTES lpMutexAttributes,
  48              WINBOOL bInitialOwner,
  49              LPCWSTR lpName)
  50 {
  51    OBJECT_ATTRIBUTES ObjectAttributes;
  52    NTSTATUS Status;
  53    UNICODE_STRING NameString;
  54    HANDLE MutantHandle;
  55
  56    RtlInitUnicodeString(&NameString,
  57                         (LPWSTR)lpName);
  58
  59    ObjectAttributes.Length = sizeof(OBJECT_ATTRIBUTES);
  60    ObjectAttributes.RootDirectory = hBaseDir;
  61    ObjectAttributes.ObjectName = &NameString;
  62    ObjectAttributes.Attributes = 0;
  63    ObjectAttributes.SecurityDescriptor = NULL;
  64    ObjectAttributes.SecurityQualityOfService = NULL;
  65
  66    if (lpMutexAttributes != NULL)
  67      {
  68         ObjectAttributes.SecurityDescriptor = lpMutexAttributes->lpSecurityDescriptor;
  69         if (lpMutexAttributes->bInheritHandle == TRUE)
  70           {
  71              ObjectAttributes.Attributes |= OBJ_INHERIT;
  72           }
  73      }
  74
  75    Status = NtCreateMutant(&MutantHandle,
  76                            MUTEX_ALL_ACCESS,
  77                            &ObjectAttributes,
  78                            (BOOLEAN)bInitialOwner);
  79    if (!NT_SUCCESS(Status))
  80      {
  81         SetLastErrorByStatus(Status);
  82         return NULL;
  83      }
  84
  85    return MutantHandle;
  86 }
  87
  88
  89 HANDLE STDCALL
  90 OpenMutexA(DWORD dwDesiredAccess,
  91            WINBOOL bInheritHandle,
  92            LPCSTR lpName)
  93 {
  94    OBJECT_ATTRIBUTES ObjectAttributes;
  95    UNICODE_STRING NameU;
  96    ANSI_STRING Name;
  97    HANDLE Handle;
  98    NTSTATUS Status;
  99
 100    if (lpName == NULL)
 101      {
 102         SetLastErrorByStatus(STATUS_INVALID_PARAMETER);
 103         return NULL;
 104      }
 105
 106    RtlInitAnsiString(&Name,
 107                      (LPSTR)lpName);
 108    RtlAnsiStringToUnicodeString(&NameU,
 109                                 &Name,
 110                                 TRUE);
 111
 112    ObjectAttributes.Length = sizeof(OBJECT_ATTRIBUTES);
 113    ObjectAttributes.RootDirectory = hBaseDir;
 114    ObjectAttributes.ObjectName = &NameU;
 115    ObjectAttributes.Attributes = 0;
 116    ObjectAttributes.SecurityDescriptor = NULL;
 117    ObjectAttributes.SecurityQualityOfService = NULL;
 118    if (bInheritHandle == TRUE)
 119      {
 120         ObjectAttributes.Attributes |= OBJ_INHERIT;
 121      }
 122
 123    Status = NtOpenMutant(&Handle,
 124                          (ACCESS_MASK)dwDesiredAccess,
 125                          &ObjectAttributes);
 126
 127    RtlFreeUnicodeString(&NameU);
 128
 129    if (!NT_SUCCESS(Status))
 130      {
 131         SetLastErrorByStatus(Status);
 132         return NULL;
 133      }
 134
 135    return Handle;
 136 }
 137
 138
 139 HANDLE STDCALL
 140 OpenMutexW(DWORD dwDesiredAccess,
 141            WINBOOL bInheritHandle,
 142            LPCWSTR lpName)
 143 {
 144    OBJECT_ATTRIBUTES ObjectAttributes;
 145    UNICODE_STRING Name;
 146    HANDLE Handle;
 147    NTSTATUS Status;
 148
 149    if (lpName == NULL)
 150      {
 151         SetLastErrorByStatus(STATUS_INVALID_PARAMETER);
 152         return NULL;
 153      }
 154
 155    RtlInitUnicodeString(&Name,
 156                         (LPWSTR)lpName);
 157
 158    ObjectAttributes.Length = sizeof(OBJECT_ATTRIBUTES);
 159    ObjectAttributes.RootDirectory = hBaseDir;
 160    ObjectAttributes.ObjectName = &Name;
 161    ObjectAttributes.Attributes = 0;
 162    ObjectAttributes.SecurityDescriptor = NULL;
 163    ObjectAttributes.SecurityQualityOfService = NULL;
 164    if (bInheritHandle == TRUE)
 165      {
 166         ObjectAttributes.Attributes |= OBJ_INHERIT;
 167      }
 168
 169    Status = NtOpenMutant(&Handle,
 170                          (ACCESS_MASK)dwDesiredAccess,
 171                          &ObjectAttributes);
 172    if (!NT_SUCCESS(Status))
 173      {
 174         SetLastErrorByStatus(Status);
 175         return NULL;
 176      }
 177
 178    return Handle;
 179 }
 180
 181
 182 WINBOOL STDCALL
 183 ReleaseMutex(HANDLE hMutex)
 184 {
 185    NTSTATUS Status;
 186
 187    Status = NtReleaseMutant(hMutex,
 188                             NULL);
 189    if (!NT_SUCCESS(Status))
 190      {
 191         SetLastErrorByStatus(Status);
 192         return FALSE;
 193      }
 194
 195    return TRUE;
 196 }
 197
 198
 199 /* EOF */