scheduler/mutex.c

   1 /*
   2  * Win32 mutexes
   3  *
   4  * Copyright 1998 Alexandre Julliard
   5  */
   6
   7 #include <assert.h>
   8 #include <string.h>
   9 #include "winerror.h"
  10 #include "heap.h"
  11 #include "server/request.h"
  12 #include "server.h"
  13
  14
  15 /***********************************************************************
  16  *           CreateMutex32A   (KERNEL32.166)
  17  */
  18 HANDLE WINAPI CreateMutexA( SECURITY_ATTRIBUTES *sa, BOOL owner, LPCSTR name )
  19 {
  20     struct create_mutex_request req;
  21     struct create_mutex_reply reply;
  22     int len = name ? strlen(name) + 1 : 0;
  23
  24     req.owned   = owner;
  25     req.inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
  26     CLIENT_SendRequest( REQ_CREATE_MUTEX, -1, 2, &req, sizeof(req), name, len );
  27     SetLastError(0);
  28     CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL );
  29     if (reply.handle == -1) return 0;
  30     return reply.handle;
  31 }
  32
  33
  34 /***********************************************************************
  35  *           CreateMutex32W   (KERNEL32.167)
  36  */
  37 HANDLE WINAPI CreateMutexW( SECURITY_ATTRIBUTES *sa, BOOL owner,
  38                                 LPCWSTR name )
  39 {
  40     LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
  41     HANDLE ret = CreateMutexA( sa, owner, nameA );
  42     if (nameA) HeapFree( GetProcessHeap(), 0, nameA );
  43     return ret;
  44 }
  45
  46
  47 /***********************************************************************
  48  *           OpenMutex32A   (KERNEL32.541)
  49  */
  50 HANDLE WINAPI OpenMutexA( DWORD access, BOOL inherit, LPCSTR name )
  51 {
  52     struct open_mutex_request req;
  53     struct open_mutex_reply reply;
  54     int len = name ? strlen(name) + 1 : 0;
  55
  56     req.access  = access;
  57     req.inherit = inherit;
  58     CLIENT_SendRequest( REQ_OPEN_MUTEX, -1, 2, &req, sizeof(req), name, len );
  59     CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL );
  60     if (reply.handle == -1) return 0; /* must return 0 on failure, not -1 */
  61     return reply.handle;
  62 }
  63
  64
  65 /***********************************************************************
  66  *           OpenMutex32W   (KERNEL32.542)
  67  */
  68 HANDLE WINAPI OpenMutexW( DWORD access, BOOL inherit, LPCWSTR name )
  69 {
  70     LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
  71     HANDLE ret = OpenMutexA( access, inherit, nameA );
  72     if (nameA) HeapFree( GetProcessHeap(), 0, nameA );
  73     return ret;
  74 }
  75
  76
  77 /***********************************************************************
  78  *           ReleaseMutex   (KERNEL32.582)
  79  */
  80 BOOL WINAPI ReleaseMutex( HANDLE handle )
  81 {
  82     struct release_mutex_request req;
  83
  84     req.handle = handle;
  85     CLIENT_SendRequest( REQ_RELEASE_MUTEX, -1, 1, &req, sizeof(req) );
  86     return !CLIENT_WaitReply( NULL, NULL, 0 );
  87 }