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 "server.h"
  11
  12
  13 /***********************************************************************
  14  *           CreateMutexA   (KERNEL32.166)
  15  */
  16 HANDLE WINAPI CreateMutexA( SECURITY_ATTRIBUTES *sa, BOOL owner, LPCSTR name )
  17 {
  18     struct create_mutex_request *req = get_req_buffer();
  19
  20     req->owned   = owner;
  21     req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
  22     server_strcpyAtoW( req->name, name );
  23     SetLastError(0);
  24     server_call( REQ_CREATE_MUTEX );
  25     if (req->handle == -1) return 0;
  26     return req->handle;
  27 }
  28
  29
  30 /***********************************************************************
  31  *           CreateMutexW   (KERNEL32.167)
  32  */
  33 HANDLE WINAPI CreateMutexW( SECURITY_ATTRIBUTES *sa, BOOL owner, LPCWSTR name )
  34 {
  35     struct create_mutex_request *req = get_req_buffer();
  36
  37     req->owned   = owner;
  38     req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
  39     server_strcpyW( req->name, name );
  40     SetLastError(0);
  41     server_call( REQ_CREATE_MUTEX );
  42     if (req->handle == -1) return 0;
  43     return req->handle;
  44 }
  45
  46
  47 /***********************************************************************
  48  *           OpenMutexA   (KERNEL32.541)
  49  */
  50 HANDLE WINAPI OpenMutexA( DWORD access, BOOL inherit, LPCSTR name )
  51 {
  52     struct open_mutex_request *req = get_req_buffer();
  53
  54     req->access  = access;
  55     req->inherit = inherit;
  56     server_strcpyAtoW( req->name, name );
  57     server_call( REQ_OPEN_MUTEX );
  58     if (req->handle == -1) return 0; /* must return 0 on failure, not -1 */
  59     return req->handle;
  60 }
  61
  62
  63 /***********************************************************************
  64  *           OpenMutexW   (KERNEL32.542)
  65  */
  66 HANDLE WINAPI OpenMutexW( DWORD access, BOOL inherit, LPCWSTR name )
  67 {
  68     struct open_mutex_request *req = get_req_buffer();
  69
  70     req->access  = access;
  71     req->inherit = inherit;
  72     server_strcpyW( req->name, name );
  73     server_call( REQ_OPEN_MUTEX );
  74     if (req->handle == -1) return 0; /* must return 0 on failure, not -1 */
  75     return req->handle;
  76 }
  77
  78
  79 /***********************************************************************
  80  *           ReleaseMutex   (KERNEL32.582)
  81  */
  82 BOOL WINAPI ReleaseMutex( HANDLE handle )
  83 {
  84     struct release_mutex_request *req = get_req_buffer();
  85     req->handle = handle;
  86     return !server_call( REQ_RELEASE_MUTEX );
  87 }