2 * Win32 process and thread synchronisation
4 * Copyright 1997 Alexandre Julliard
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 #include "file.h" /* for DOSFS_UnixTimeToFileTime */
32 #include "wine/server.h"
36 /***********************************************************************
39 inline static void get_timeout( struct timeval *when, int timeout )
41 gettimeofday( when, 0 );
44 long sec = timeout / 1000;
45 if ((when->tv_usec += (timeout - 1000*sec) * 1000) >= 1000000)
47 when->tv_usec -= 1000000;
54 /***********************************************************************
57 * Process a status event from the server.
59 static void WINAPI check_async_list(async_private *asp, DWORD status)
64 for( ovp = NtCurrentTeb()->pending_list; ovp && ovp != asp; ovp = ovp->next );
69 if( status != STATUS_ALERTED )
72 ovp->ops->set_status (ovp, status);
74 else ovp_status = ovp->ops->get_status (ovp);
76 if( ovp_status == STATUS_PENDING ) ovp->func( ovp );
78 /* This will destroy all but PENDING requests */
79 register_old_async( ovp );
83 /***********************************************************************
86 * Wait for a reply on the waiting pipe of the current thread.
88 static int wait_reply( void *cookie )
91 struct wake_up_reply reply;
95 ret = read( NtCurrentTeb()->wait_fd[0], &reply, sizeof(reply) );
96 if (ret == sizeof(reply))
98 if (!reply.cookie) break; /* thread got killed */
99 if (reply.cookie == cookie) return reply.signaled;
100 /* we stole another reply, wait for the real one */
101 signaled = wait_reply( cookie );
102 /* and now put the wrong one back in the pipe */
105 ret = write( NtCurrentTeb()->wait_fd[1], &reply, sizeof(reply) );
106 if (ret == sizeof(reply)) break;
107 if (ret >= 0) server_protocol_error( "partial wakeup write %d\n", ret );
108 if (errno == EINTR) continue;
109 server_protocol_perror("wakeup write");
113 if (ret >= 0) server_protocol_error( "partial wakeup read %d\n", ret );
114 if (errno == EINTR) continue;
115 server_protocol_perror("wakeup read");
117 /* the server closed the connection; time to die... */
118 SYSDEPS_AbortThread(0);
122 /***********************************************************************
125 * Call outstanding APCs.
127 static void call_apcs( BOOL alertable )
136 SERVER_START_REQ( get_apc )
138 req->alertable = alertable;
139 wine_server_set_reply( req, args, sizeof(args) );
140 if (!wine_server_call( req ))
151 return; /* no more APCs */
153 proc( args[0], args[1]);
159 /* convert sec/usec to NT time */
160 DOSFS_UnixTimeToFileTime( (time_t)args[0], &ft, (DWORD)args[1] * 10 );
161 proc( args[2], ft.dwLowDateTime, ft.dwHighDateTime );
164 check_async_list ( args[0], (DWORD) args[1]);
167 server_protocol_error( "get_apc_request: bad type %d\n", type );
173 /***********************************************************************
176 VOID WINAPI Sleep( DWORD timeout )
178 WaitForMultipleObjectsEx( 0, NULL, FALSE, timeout, FALSE );
181 /******************************************************************************
182 * SleepEx (KERNEL32.@)
184 DWORD WINAPI SleepEx( DWORD timeout, BOOL alertable )
186 DWORD ret = WaitForMultipleObjectsEx( 0, NULL, FALSE, timeout, alertable );
187 if (ret != WAIT_IO_COMPLETION) ret = 0;
192 /***********************************************************************
193 * WaitForSingleObject (KERNEL32.@)
195 DWORD WINAPI WaitForSingleObject( HANDLE handle, DWORD timeout )
197 return WaitForMultipleObjectsEx( 1, &handle, FALSE, timeout, FALSE );
201 /***********************************************************************
202 * WaitForSingleObjectEx (KERNEL32.@)
204 DWORD WINAPI WaitForSingleObjectEx( HANDLE handle, DWORD timeout,
207 return WaitForMultipleObjectsEx( 1, &handle, FALSE, timeout, alertable );
211 /***********************************************************************
212 * WaitForMultipleObjects (KERNEL32.@)
214 DWORD WINAPI WaitForMultipleObjects( DWORD count, const HANDLE *handles,
215 BOOL wait_all, DWORD timeout )
217 return WaitForMultipleObjectsEx( count, handles, wait_all, timeout, FALSE );
221 /***********************************************************************
222 * WaitForMultipleObjectsEx (KERNEL32.@)
224 DWORD WINAPI WaitForMultipleObjectsEx( DWORD count, const HANDLE *handles,
225 BOOL wait_all, DWORD timeout,
231 if (count > MAXIMUM_WAIT_OBJECTS)
233 SetLastError( ERROR_INVALID_PARAMETER );
237 if (timeout == INFINITE) tv.tv_sec = tv.tv_usec = 0;
238 else get_timeout( &tv, timeout );
242 SERVER_START_REQ( select )
244 req->flags = SELECT_INTERRUPTIBLE;
245 req->cookie = &cookie;
246 req->sec = tv.tv_sec;
247 req->usec = tv.tv_usec;
248 wine_server_add_data( req, handles, count * sizeof(HANDLE) );
250 if (wait_all) req->flags |= SELECT_ALL;
251 if (alertable) req->flags |= SELECT_ALERTABLE;
252 if (timeout != INFINITE) req->flags |= SELECT_TIMEOUT;
254 ret = wine_server_call( req );
257 if (ret == STATUS_PENDING) ret = wait_reply( &cookie );
258 if (ret != STATUS_USER_APC) break;
259 call_apcs( alertable );
260 if (alertable) break;
262 if (HIWORD(ret)) /* is it an error code? */
264 SetLastError( RtlNtStatusToDosError(ret) );
271 /***********************************************************************
272 * WaitForSingleObject (KERNEL.460)
274 DWORD WINAPI WaitForSingleObject16( HANDLE handle, DWORD timeout )
276 DWORD retval, mutex_count;
278 ReleaseThunkLock( &mutex_count );
279 retval = WaitForSingleObject( handle, timeout );
280 RestoreThunkLock( mutex_count );
284 /***********************************************************************
285 * WaitForMultipleObjects (KERNEL.461)
287 DWORD WINAPI WaitForMultipleObjects16( DWORD count, const HANDLE *handles,
288 BOOL wait_all, DWORD timeout )
290 DWORD retval, mutex_count;
292 ReleaseThunkLock( &mutex_count );
293 retval = WaitForMultipleObjectsEx( count, handles, wait_all, timeout, FALSE );
294 RestoreThunkLock( mutex_count );
298 /***********************************************************************
299 * WaitForMultipleObjectsEx (KERNEL.495)
301 DWORD WINAPI WaitForMultipleObjectsEx16( DWORD count, const HANDLE *handles,
302 BOOL wait_all, DWORD timeout, BOOL alertable )
304 DWORD retval, mutex_count;
306 ReleaseThunkLock( &mutex_count );
307 retval = WaitForMultipleObjectsEx( count, handles, wait_all, timeout, alertable );
308 RestoreThunkLock( mutex_count );