scheduler/event.c

   1 /*
   2  * Win32 events
   3  *
   4  * Copyright 1998 Alexandre Julliard
   5  */
   6
   7 #include <assert.h>
   8 #include <string.h>
   9 #include "winerror.h"
  10 #include "syslevel.h"
  11 #include "server.h"
  12
  13
  14 /***********************************************************************
  15  *           CreateEventA    (KERNEL32.156)
  16  */
  17 HANDLE WINAPI CreateEventA( SECURITY_ATTRIBUTES *sa, BOOL manual_reset,
  18                             BOOL initial_state, LPCSTR name )
  19 {
  20     struct create_event_request *req = get_req_buffer();
  21
  22     req->manual_reset = manual_reset;
  23     req->initial_state = initial_state;
  24     req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
  25     server_strcpyAtoW( req->name, name );
  26     SetLastError(0);
  27     server_call( REQ_CREATE_EVENT );
  28     if (req->handle == -1) return 0;
  29     return req->handle;
  30 }
  31
  32
  33 /***********************************************************************
  34  *           CreateEventW    (KERNEL32.157)
  35  */
  36 HANDLE WINAPI CreateEventW( SECURITY_ATTRIBUTES *sa, BOOL manual_reset,
  37                             BOOL initial_state, LPCWSTR name )
  38 {
  39     struct create_event_request *req = get_req_buffer();
  40
  41     req->manual_reset = manual_reset;
  42     req->initial_state = initial_state;
  43     req->inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
  44     server_strcpyW( req->name, name );
  45     SetLastError(0);
  46     server_call( REQ_CREATE_EVENT );
  47     if (req->handle == -1) return 0;
  48     return req->handle;
  49 }
  50
  51 /***********************************************************************
  52  *           WIN16_CreateEvent    (KERNEL.457)
  53  */
  54 HANDLE WINAPI WIN16_CreateEvent( BOOL manual_reset, BOOL initial_state )
  55 {
  56     return CreateEventA( NULL, manual_reset, initial_state, NULL );
  57 }
  58
  59
  60 /***********************************************************************
  61  *           OpenEventA    (KERNEL32.536)
  62  */
  63 HANDLE WINAPI OpenEventA( DWORD access, BOOL inherit, LPCSTR name )
  64 {
  65     struct open_event_request *req = get_req_buffer();
  66
  67     req->access  = access;
  68     req->inherit = inherit;
  69     server_strcpyAtoW( req->name, name );
  70     server_call( REQ_OPEN_EVENT );
  71     if (req->handle == -1) return 0; /* must return 0 on failure, not -1 */
  72     return req->handle;
  73 }
  74
  75
  76 /***********************************************************************
  77  *           OpenEventW    (KERNEL32.537)
  78  */
  79 HANDLE WINAPI OpenEventW( DWORD access, BOOL inherit, LPCWSTR name )
  80 {
  81     struct open_event_request *req = get_req_buffer();
  82
  83     req->access  = access;
  84     req->inherit = inherit;
  85     server_strcpyW( req->name, name );
  86     server_call( REQ_OPEN_EVENT );
  87     if (req->handle == -1) return 0; /* must return 0 on failure, not -1 */
  88     return req->handle;
  89 }
  90
  91
  92 /***********************************************************************
  93  *           EVENT_Operation
  94  *
  95  * Execute an event operation (set,reset,pulse).
  96  */
  97 static BOOL EVENT_Operation( HANDLE handle, enum event_op op )
  98 {
  99     struct event_op_request *req = get_req_buffer();
 100     req->handle = handle;
 101     req->op     = op;
 102     return !server_call( REQ_EVENT_OP );
 103 }
 104
 105
 106 /***********************************************************************
 107  *           PulseEvent    (KERNEL32.557)
 108  */
 109 BOOL WINAPI PulseEvent( HANDLE handle )
 110 {
 111     return EVENT_Operation( handle, PULSE_EVENT );
 112 }
 113
 114
 115 /***********************************************************************
 116  *           SetEvent    (KERNEL32.644)
 117  */
 118 BOOL WINAPI SetEvent( HANDLE handle )
 119 {
 120     return EVENT_Operation( handle, SET_EVENT );
 121 }
 122
 123
 124 /***********************************************************************
 125  *           ResetEvent    (KERNEL32.586)
 126  */
 127 BOOL WINAPI ResetEvent( HANDLE handle )
 128 {
 129     return EVENT_Operation( handle, RESET_EVENT );
 130 }
 131
 132
 133 /***********************************************************************
 134  * NOTE: The Win95 VWin32_Event routines given below are really low-level
 135  *       routines implemented directly by VWin32. The user-mode libraries
 136  *       implement Win32 synchronisation routines on top of these low-level
 137  *       primitives. We do it the other way around here :-)
 138  */
 139
 140 /***********************************************************************
 141  *       VWin32_EventCreate     (KERNEL.442)
 142  */
 143 HANDLE WINAPI VWin32_EventCreate(VOID)
 144 {
 145     HANDLE hEvent = CreateEventA( NULL, FALSE, 0, NULL );
 146     return ConvertToGlobalHandle( hEvent );
 147 }
 148
 149 /***********************************************************************
 150  *       VWin32_EventDestroy    (KERNEL.443)
 151  */
 152 VOID WINAPI VWin32_EventDestroy(HANDLE event)
 153 {
 154     CloseHandle( event );
 155 }
 156
 157 /***********************************************************************
 158  *       VWin32_EventWait       (KERNEL.450)
 159  */
 160 VOID WINAPI VWin32_EventWait(HANDLE event)
 161 {
 162     SYSLEVEL_ReleaseWin16Lock();
 163     WaitForSingleObject( event, INFINITE );
 164     SYSLEVEL_RestoreWin16Lock();
 165 }
 166
 167 /***********************************************************************
 168  *       VWin32_EventSet        (KERNEL.451)
 169  */
 170 VOID WINAPI VWin32_EventSet(HANDLE event)
 171 {
 172     SetEvent( event );
 173 }
 174