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
26 #ifdef HAVE_SYS_TIME_H
27 # include <sys/time.h>
29 #ifdef HAVE_SYS_POLL_H
30 # include <sys/poll.h>
37 #include "file.h" /* for DOSFS_UnixTimeToFileTime */
40 #include "wine/server.h"
44 /***********************************************************************
47 inline static void get_timeout( struct timeval *when, int timeout )
49 gettimeofday( when, 0 );
52 long sec = timeout / 1000;
53 if ((when->tv_usec += (timeout - 1000*sec) * 1000) >= 1000000)
55 when->tv_usec -= 1000000;
62 /***********************************************************************
65 * Process a status event from the server.
67 static void WINAPI check_async_list(async_private *asp, DWORD status)
72 for( ovp = NtCurrentTeb()->pending_list; ovp && ovp != asp; ovp = ovp->next );
77 if( status != STATUS_ALERTED )
80 ovp->ops->set_status (ovp, status);
82 else ovp_status = ovp->ops->get_status (ovp);
84 if( ovp_status == STATUS_PENDING ) ovp->func( ovp );
86 /* This will destroy all but PENDING requests */
87 register_old_async( ovp );
91 /***********************************************************************
94 * Wait for a reply on the waiting pipe of the current thread.
96 static int wait_reply( void *cookie )
99 struct wake_up_reply reply;
103 ret = read( NtCurrentTeb()->wait_fd[0], &reply, sizeof(reply) );
104 if (ret == sizeof(reply))
106 if (!reply.cookie) break; /* thread got killed */
107 if (reply.cookie == cookie) return reply.signaled;
108 /* we stole another reply, wait for the real one */
109 signaled = wait_reply( cookie );
110 /* and now put the wrong one back in the pipe */
113 ret = write( NtCurrentTeb()->wait_fd[1], &reply, sizeof(reply) );
114 if (ret == sizeof(reply)) break;
115 if (ret >= 0) server_protocol_error( "partial wakeup write %d\n", ret );
116 if (errno == EINTR) continue;
117 server_protocol_perror("wakeup write");
121 if (ret >= 0) server_protocol_error( "partial wakeup read %d\n", ret );
122 if (errno == EINTR) continue;
123 server_protocol_perror("wakeup read");
125 /* the server closed the connection; time to die... */
126 SYSDEPS_AbortThread(0);
130 /***********************************************************************
133 * Call outstanding APCs.
135 static void call_apcs( BOOL alertable )
144 SERVER_START_REQ( get_apc )
146 req->alertable = alertable;
147 wine_server_set_reply( req, args, sizeof(args) );
148 if (!wine_server_call( req ))
159 return; /* no more APCs */
161 proc( args[0], args[1]);
167 /* convert sec/usec to NT time */
168 DOSFS_UnixTimeToFileTime( (time_t)args[0], &ft, (DWORD)args[1] * 10 );
169 proc( args[2], ft.dwLowDateTime, ft.dwHighDateTime );
172 check_async_list ( args[0], (DWORD) args[1]);
175 server_protocol_error( "get_apc_request: bad type %d\n", type );
181 /***********************************************************************
184 VOID WINAPI Sleep( DWORD timeout )
186 WaitForMultipleObjectsEx( 0, NULL, FALSE, timeout, FALSE );
189 /******************************************************************************
190 * SleepEx (KERNEL32.@)
192 DWORD WINAPI SleepEx( DWORD timeout, BOOL alertable )
194 DWORD ret = WaitForMultipleObjectsEx( 0, NULL, FALSE, timeout, alertable );
195 if (ret != WAIT_IO_COMPLETION) ret = 0;
200 /***********************************************************************
201 * WaitForSingleObject (KERNEL32.@)
203 DWORD WINAPI WaitForSingleObject( HANDLE handle, DWORD timeout )
205 return WaitForMultipleObjectsEx( 1, &handle, FALSE, timeout, FALSE );
209 /***********************************************************************
210 * WaitForSingleObjectEx (KERNEL32.@)
212 DWORD WINAPI WaitForSingleObjectEx( HANDLE handle, DWORD timeout,
215 return WaitForMultipleObjectsEx( 1, &handle, FALSE, timeout, alertable );
219 /***********************************************************************
220 * WaitForMultipleObjects (KERNEL32.@)
222 DWORD WINAPI WaitForMultipleObjects( DWORD count, const HANDLE *handles,
223 BOOL wait_all, DWORD timeout )
225 return WaitForMultipleObjectsEx( count, handles, wait_all, timeout, FALSE );
229 /***********************************************************************
230 * WaitForMultipleObjectsEx (KERNEL32.@)
232 DWORD WINAPI WaitForMultipleObjectsEx( DWORD count, const HANDLE *handles,
233 BOOL wait_all, DWORD timeout,
239 if (count > MAXIMUM_WAIT_OBJECTS)
241 SetLastError( ERROR_INVALID_PARAMETER );
245 if (timeout == INFINITE) tv.tv_sec = tv.tv_usec = 0;
246 else get_timeout( &tv, timeout );
250 SERVER_START_REQ( select )
252 req->flags = SELECT_INTERRUPTIBLE;
253 req->cookie = &cookie;
254 req->sec = tv.tv_sec;
255 req->usec = tv.tv_usec;
256 wine_server_add_data( req, handles, count * sizeof(HANDLE) );
258 if (wait_all) req->flags |= SELECT_ALL;
259 if (alertable) req->flags |= SELECT_ALERTABLE;
260 if (timeout != INFINITE) req->flags |= SELECT_TIMEOUT;
262 ret = wine_server_call( req );
265 if (ret == STATUS_PENDING) ret = wait_reply( &cookie );
266 if (ret != STATUS_USER_APC) break;
267 call_apcs( alertable );
268 if (alertable) break;
270 if (HIWORD(ret)) /* is it an error code? */
272 SetLastError( RtlNtStatusToDosError(ret) );
279 /***********************************************************************
280 * WaitForSingleObject (KERNEL.460)
282 DWORD WINAPI WaitForSingleObject16( HANDLE handle, DWORD timeout )
284 DWORD retval, mutex_count;
286 ReleaseThunkLock( &mutex_count );
287 retval = WaitForSingleObject( handle, timeout );
288 RestoreThunkLock( mutex_count );
292 /***********************************************************************
293 * WaitForMultipleObjects (KERNEL.461)
295 DWORD WINAPI WaitForMultipleObjects16( DWORD count, const HANDLE *handles,
296 BOOL wait_all, DWORD timeout )
298 DWORD retval, mutex_count;
300 ReleaseThunkLock( &mutex_count );
301 retval = WaitForMultipleObjectsEx( count, handles, wait_all, timeout, FALSE );
302 RestoreThunkLock( mutex_count );
306 /***********************************************************************
307 * WaitForMultipleObjectsEx (KERNEL.495)
309 DWORD WINAPI WaitForMultipleObjectsEx16( DWORD count, const HANDLE *handles,
310 BOOL wait_all, DWORD timeout, BOOL alertable )
312 DWORD retval, mutex_count;
314 ReleaseThunkLock( &mutex_count );
315 retval = WaitForMultipleObjectsEx( count, handles, wait_all, timeout, alertable );
316 RestoreThunkLock( mutex_count );