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Make the header in-line with current ICOM naming conventions.
[wine/multimedia.git] / server / thread.c
blobc6ef4acec4a9ddca9a663988a15617f86ea31275
1 /*
2 * Server-side thread management
3 *
4 * Copyright (C) 1998 Alexandre Julliard
5 *
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.
10 *
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.
15 *
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
19 */
20
21 #include "config.h"
22 #include "wine/port.h"
23
24 #include <assert.h>
25 #include <errno.h>
26 #include <fcntl.h>
27 #include <signal.h>
28 #include <stdarg.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <sys/types.h>
33 #include <unistd.h>
34 #include <time.h>
35
36 #include "winbase.h"
37
38 #include "file.h"
39 #include "handle.h"
40 #include "process.h"
41 #include "thread.h"
42 #include "request.h"
43 #include "user.h"
44
45
46 /* thread queues */
47
48 struct thread_wait
49 {
50 struct thread_wait *next; /* next wait structure for this thread */
51 struct thread *thread; /* owner thread */
52 int count; /* count of objects */
53 int flags;
54 void *cookie; /* magic cookie to return to client */
55 struct timeval timeout;
56 struct timeout_user *user;
57 struct wait_queue_entry queues[1];
58 };
59
60 /* asynchronous procedure calls */
61
62 struct thread_apc
63 {
64 struct thread_apc *next; /* queue linked list */
65 struct thread_apc *prev;
66 struct object *owner; /* object that queued this apc */
67 void *func; /* function to call in client */
68 enum apc_type type; /* type of apc function */
69 int nb_args; /* number of arguments */
70 void *arg1; /* function arguments */
71 void *arg2;
72 void *arg3;
73 };
74
75
76 /* thread operations */
77
78 static void dump_thread( struct object *obj, int verbose );
79 static int thread_signaled( struct object *obj, struct thread *thread );
80 static void thread_poll_event( struct fd *fd, int event );
81 static void destroy_thread( struct object *obj );
82 static struct thread_apc *thread_dequeue_apc( struct thread *thread, int system_only );
83
84 static const struct object_ops thread_ops =
85 {
86 sizeof(struct thread), /* size */
87 dump_thread, /* dump */
88 add_queue, /* add_queue */
89 remove_queue, /* remove_queue */
90 thread_signaled, /* signaled */
91 no_satisfied, /* satisfied */
92 no_get_fd, /* get_fd */
93 destroy_thread /* destroy */
94 };
95
96 static const struct fd_ops thread_fd_ops =
97 {
98 NULL, /* get_poll_events */
99 thread_poll_event, /* poll_event */
100 no_flush, /* flush */
101 no_get_file_info, /* get_file_info */
102 no_queue_async /* queue_async */
103 };
104
105 static struct thread *first_thread;
106 static struct thread *booting_thread;
107
108 /* initialize the structure for a newly allocated thread */
109 inline static void init_thread_structure( struct thread *thread )
110 {
111 int i;
112
113 thread->unix_pid = -1; /* not known yet */
114 thread->unix_tid = -1; /* not known yet */
115 thread->context = NULL;
116 thread->teb = NULL;
117 thread->mutex = NULL;
118 thread->debug_ctx = NULL;
119 thread->debug_event = NULL;
120 thread->queue = NULL;
121 thread->hooks = NULL;
122 thread->wait = NULL;
123 thread->system_apc.head = NULL;
124 thread->system_apc.tail = NULL;
125 thread->user_apc.head = NULL;
126 thread->user_apc.tail = NULL;
127 thread->error = 0;
128 thread->req_data = NULL;
129 thread->req_toread = 0;
130 thread->reply_data = NULL;
131 thread->reply_towrite = 0;
132 thread->request_fd = NULL;
133 thread->reply_fd = NULL;
134 thread->wait_fd = NULL;
135 thread->state = RUNNING;
136 thread->attached = 0;
137 thread->exit_code = 0;
138 thread->next = NULL;
139 thread->prev = NULL;
140 thread->priority = THREAD_PRIORITY_NORMAL;
141 thread->affinity = 1;
142 thread->suspend = 0;
143 thread->creation_time = time(NULL);
144 thread->exit_time = 0;
145
146 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
147 thread->inflight[i].server = thread->inflight[i].client = -1;
148 }
149
150 /* create a new thread */
151 struct thread *create_thread( int fd, struct process *process )
152 {
153 struct thread *thread;
154
155 if (!(thread = alloc_object( &thread_ops ))) return NULL;
156
157 init_thread_structure( thread );
158
159 thread->process = (struct process *)grab_object( process );
160 if (!current) current = thread;
161
162 if (!booting_thread) /* first thread ever */
163 {
164 booting_thread = thread;
165 lock_master_socket(1);
166 }
167
168 if ((thread->next = first_thread) != NULL) thread->next->prev = thread;
169 first_thread = thread;
170
171 if (!(thread->id = alloc_ptid( thread )))
172 {
173 release_object( thread );
174 return NULL;
175 }
176 if (!(thread->request_fd = create_anonymous_fd( &thread_fd_ops, fd, &thread->obj )))
177 {
178 release_object( thread );
179 return NULL;
180 }
181
182 set_fd_events( thread->request_fd, POLLIN ); /* start listening to events */
183 add_process_thread( thread->process, thread );
184 return thread;
185 }
186
187 /* handle a client event */
188 static void thread_poll_event( struct fd *fd, int event )
189 {
190 struct thread *thread = get_fd_user( fd );
191 assert( thread->obj.ops == &thread_ops );
192
193 if (event & (POLLERR | POLLHUP)) kill_thread( thread, 0 );
194 else if (event & POLLIN) read_request( thread );
195 else if (event & POLLOUT) write_reply( thread );
196 }
197
198 /* cleanup everything that is no longer needed by a dead thread */
199 /* used by destroy_thread and kill_thread */
200 static void cleanup_thread( struct thread *thread )
201 {
202 int i;
203 struct thread_apc *apc;
204
205 while ((apc = thread_dequeue_apc( thread, 0 ))) free( apc );
206 if (thread->req_data) free( thread->req_data );
207 if (thread->reply_data) free( thread->reply_data );
208 if (thread->request_fd) release_object( thread->request_fd );
209 if (thread->reply_fd) release_object( thread->reply_fd );
210 if (thread->wait_fd) release_object( thread->wait_fd );
211 if (thread->hooks) release_object( thread->hooks );
212 free_msg_queue( thread );
213 destroy_thread_windows( thread );
214 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
215 {
216 if (thread->inflight[i].client != -1)
217 {
218 close( thread->inflight[i].server );
219 thread->inflight[i].client = thread->inflight[i].server = -1;
220 }
221 }
222 thread->req_data = NULL;
223 thread->reply_data = NULL;
224 thread->request_fd = NULL;
225 thread->reply_fd = NULL;
226 thread->wait_fd = NULL;
227 thread->hooks = NULL;
228
229 if (thread == booting_thread) /* killing booting thread */
230 {
231 booting_thread = NULL;
232 lock_master_socket(0);
233 }
234 }
235
236 /* destroy a thread when its refcount is 0 */
237 static void destroy_thread( struct object *obj )
238 {
239 struct thread_apc *apc;
240 struct thread *thread = (struct thread *)obj;
241 assert( obj->ops == &thread_ops );
242
243 assert( !thread->debug_ctx ); /* cannot still be debugging something */
244 if (thread->next) thread->next->prev = thread->prev;
245 if (thread->prev) thread->prev->next = thread->next;
246 else first_thread = thread->next;
247 while ((apc = thread_dequeue_apc( thread, 0 ))) free( apc );
248 cleanup_thread( thread );
249 release_object( thread->process );
250 if (thread->id) free_ptid( thread->id );
251 }
252
253 /* dump a thread on stdout for debugging purposes */
254 static void dump_thread( struct object *obj, int verbose )
255 {
256 struct thread *thread = (struct thread *)obj;
257 assert( obj->ops == &thread_ops );
258
259 fprintf( stderr, "Thread id=%04x unix pid=%d unix tid=%d teb=%p state=%d\n",
260 thread->id, thread->unix_pid, thread->unix_tid, thread->teb, thread->state );
261 }
262
263 static int thread_signaled( struct object *obj, struct thread *thread )
264 {
265 struct thread *mythread = (struct thread *)obj;
266 return (mythread->state == TERMINATED);
267 }
268
269 /* get a thread pointer from a thread id (and increment the refcount) */
270 struct thread *get_thread_from_id( thread_id_t id )
271 {
272 struct object *obj = get_ptid_entry( id );
273
274 if (obj && obj->ops == &thread_ops) return (struct thread *)grab_object( obj );
275 set_error( STATUS_INVALID_PARAMETER );
276 return NULL;
277 }
278
279 /* get a thread from a handle (and increment the refcount) */
280 struct thread *get_thread_from_handle( obj_handle_t handle, unsigned int access )
281 {
282 return (struct thread *)get_handle_obj( current->process, handle,
283 access, &thread_ops );
284 }
285
286 /* find a thread from a Unix pid */
287 struct thread *get_thread_from_pid( int pid )
288 {
289 struct thread *t;
290
291 for (t = first_thread; t; t = t->next) if (t->unix_tid == pid) return t;
292 for (t = first_thread; t; t = t->next) if (t->unix_pid == pid) return t;
293 return NULL;
294 }
295
296 /* set all information about a thread */
297 static void set_thread_info( struct thread *thread,
298 const struct set_thread_info_request *req )
299 {
300 if (req->mask & SET_THREAD_INFO_PRIORITY)
301 thread->priority = req->priority;
302 if (req->mask & SET_THREAD_INFO_AFFINITY)
303 {
304 if (req->affinity != 1) set_error( STATUS_INVALID_PARAMETER );
305 else thread->affinity = req->affinity;
306 }
307 }
308
309 /* stop a thread (at the Unix level) */
310 void stop_thread( struct thread *thread )
311 {
312 /* can't stop a thread while initialisation is in progress */
313 if (is_process_init_done(thread->process)) send_thread_signal( thread, SIGUSR1 );
314 }
315
316 /* suspend a thread */
317 static int suspend_thread( struct thread *thread )
318 {
319 int old_count = thread->suspend;
320 if (thread->suspend < MAXIMUM_SUSPEND_COUNT)
321 {
322 if (!(thread->process->suspend + thread->suspend++)) stop_thread( thread );
323 }
324 else set_error( STATUS_SUSPEND_COUNT_EXCEEDED );
325 return old_count;
326 }
327
328 /* resume a thread */
329 static int resume_thread( struct thread *thread )
330 {
331 int old_count = thread->suspend;
332 if (thread->suspend > 0)
333 {
334 if (!(--thread->suspend + thread->process->suspend)) wake_thread( thread );
335 }
336 return old_count;
337 }
338
339 /* add a thread to an object wait queue; return 1 if OK, 0 on error */
340 int add_queue( struct object *obj, struct wait_queue_entry *entry )
341 {
342 grab_object( obj );
343 entry->obj = obj;
344 entry->prev = obj->tail;
345 entry->next = NULL;
346 if (obj->tail) obj->tail->next = entry;
347 else obj->head = entry;
348 obj->tail = entry;
349 return 1;
350 }
351
352 /* remove a thread from an object wait queue */
353 void remove_queue( struct object *obj, struct wait_queue_entry *entry )
354 {
355 if (entry->next) entry->next->prev = entry->prev;
356 else obj->tail = entry->prev;
357 if (entry->prev) entry->prev->next = entry->next;
358 else obj->head = entry->next;
359 release_object( obj );
360 }
361
362 /* finish waiting */
363 static void end_wait( struct thread *thread )
364 {
365 struct thread_wait *wait = thread->wait;
366 struct wait_queue_entry *entry;
367 int i;
368
369 assert( wait );
370 for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
371 entry->obj->ops->remove_queue( entry->obj, entry );
372 if (wait->user) remove_timeout_user( wait->user );
373 thread->wait = wait->next;
374 free( wait );
375 }
376
377 /* build the thread wait structure */
378 static int wait_on( int count, struct object *objects[], int flags, const abs_time_t *timeout )
379 {
380 struct thread_wait *wait;
381 struct wait_queue_entry *entry;
382 int i;
383
384 if (!(wait = mem_alloc( sizeof(*wait) + (count-1) * sizeof(*entry) ))) return 0;
385 wait->next = current->wait;
386 wait->thread = current;
387 wait->count = count;
388 wait->flags = flags;
389 wait->user = NULL;
390 current->wait = wait;
391 if (flags & SELECT_TIMEOUT)
392 {
393 wait->timeout.tv_sec = timeout->sec;
394 wait->timeout.tv_usec = timeout->usec;
395 }
396
397 for (i = 0, entry = wait->queues; i < count; i++, entry++)
398 {
399 struct object *obj = objects[i];
400 entry->thread = current;
401 if (!obj->ops->add_queue( obj, entry ))
402 {
403 wait->count = i;
404 end_wait( current );
405 return 0;
406 }
407 }
408 return 1;
409 }
410
411 /* check if the thread waiting condition is satisfied */
412 static int check_wait( struct thread *thread )
413 {
414 int i, signaled;
415 struct thread_wait *wait = thread->wait;
416 struct wait_queue_entry *entry = wait->queues;
417
418 /* Suspended threads may not acquire locks */
419 if( thread->process->suspend + thread->suspend > 0 ) return -1;
420
421 assert( wait );
422 if (wait->flags & SELECT_ALL)
423 {
424 int not_ok = 0;
425 /* Note: we must check them all anyway, as some objects may
426 * want to do something when signaled, even if others are not */
427 for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
428 not_ok |= !entry->obj->ops->signaled( entry->obj, thread );
429 if (not_ok) goto other_checks;
430 /* Wait satisfied: tell it to all objects */
431 signaled = 0;
432 for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
433 if (entry->obj->ops->satisfied( entry->obj, thread ))
434 signaled = STATUS_ABANDONED_WAIT_0;
435 return signaled;
436 }
437 else
438 {
439 for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
440 {
441 if (!entry->obj->ops->signaled( entry->obj, thread )) continue;
442 /* Wait satisfied: tell it to the object */
443 signaled = i;
444 if (entry->obj->ops->satisfied( entry->obj, thread ))
445 signaled = i + STATUS_ABANDONED_WAIT_0;
446 return signaled;
447 }
448 }
449
450 other_checks:
451 if ((wait->flags & SELECT_INTERRUPTIBLE) && thread->system_apc.head) return STATUS_USER_APC;
452 if ((wait->flags & SELECT_ALERTABLE) && thread->user_apc.head) return STATUS_USER_APC;
453 if (wait->flags & SELECT_TIMEOUT)
454 {
455 struct timeval now;
456 gettimeofday( &now, NULL );
457 if (!time_before( &now, &wait->timeout )) return STATUS_TIMEOUT;
458 }
459 return -1;
460 }
461
462 /* send the wakeup signal to a thread */
463 static int send_thread_wakeup( struct thread *thread, void *cookie, int signaled )
464 {
465 struct wake_up_reply reply;
466 int ret;
467
468 reply.cookie = cookie;
469 reply.signaled = signaled;
470 if ((ret = write( get_unix_fd( thread->wait_fd ), &reply, sizeof(reply) )) == sizeof(reply))
471 return 0;
472 if (ret >= 0)
473 fatal_protocol_error( thread, "partial wakeup write %d\n", ret );
474 else if (errno == EPIPE)
475 kill_thread( thread, 0 ); /* normal death */
476 else
477 fatal_protocol_perror( thread, "write" );
478 return -1;
479 }
480
481 /* attempt to wake up a thread */
482 /* return >0 if OK, 0 if the wait condition is still not satisfied */
483 int wake_thread( struct thread *thread )
484 {
485 int signaled, count;
486 void *cookie;
487
488 for (count = 0; thread->wait; count++)
489 {
490 if ((signaled = check_wait( thread )) == -1) break;
491
492 cookie = thread->wait->cookie;
493 if (debug_level) fprintf( stderr, "%04x: *wakeup* signaled=%d cookie=%p\n",
494 thread->id, signaled, cookie );
495 end_wait( thread );
496 if (send_thread_wakeup( thread, cookie, signaled ) == -1) /* error */
497 break;
498 }
499 return count;
500 }
501
502 /* thread wait timeout */
503 static void thread_timeout( void *ptr )
504 {
505 struct thread_wait *wait = ptr;
506 struct thread *thread = wait->thread;
507 void *cookie = wait->cookie;
508
509 wait->user = NULL;
510 if (thread->wait != wait) return; /* not the top-level wait, ignore it */
511 if (thread->suspend + thread->process->suspend > 0) return; /* suspended, ignore it */
512
513 if (debug_level) fprintf( stderr, "%04x: *wakeup* signaled=%d cookie=%p\n",
514 thread->id, STATUS_TIMEOUT, cookie );
515 end_wait( thread );
516 if (send_thread_wakeup( thread, cookie, STATUS_TIMEOUT ) == -1) return;
517 /* check if other objects have become signaled in the meantime */
518 wake_thread( thread );
519 }
520
521 /* select on a list of handles */
522 static void select_on( int count, void *cookie, const obj_handle_t *handles,
523 int flags, const abs_time_t *timeout )
524 {
525 int ret, i;
526 struct object *objects[MAXIMUM_WAIT_OBJECTS];
527
528 if ((count < 0) || (count > MAXIMUM_WAIT_OBJECTS))
529 {
530 set_error( STATUS_INVALID_PARAMETER );
531 return;
532 }
533 for (i = 0; i < count; i++)
534 {
535 if (!(objects[i] = get_handle_obj( current->process, handles[i], SYNCHRONIZE, NULL )))
536 break;
537 }
538
539 if (i < count) goto done;
540 if (!wait_on( count, objects, flags, timeout )) goto done;
541
542 if ((ret = check_wait( current )) != -1)
543 {
544 /* condition is already satisfied */
545 end_wait( current );
546 set_error( ret );
547 goto done;
548 }
549
550 /* now we need to wait */
551 if (flags & SELECT_TIMEOUT)
552 {
553 if (!(current->wait->user = add_timeout_user( &current->wait->timeout,
554 thread_timeout, current->wait )))
555 {
556 end_wait( current );
557 goto done;
558 }
559 }
560 current->wait->cookie = cookie;
561 set_error( STATUS_PENDING );
562
563 done:
564 while (--i >= 0) release_object( objects[i] );
565 }
566
567 /* attempt to wake threads sleeping on the object wait queue */
568 void wake_up( struct object *obj, int max )
569 {
570 struct wait_queue_entry *entry = obj->head;
571
572 while (entry)
573 {
574 struct thread *thread = entry->thread;
575 entry = entry->next;
576 if (wake_thread( thread ))
577 {
578 if (max && !--max) break;
579 }
580 }
581 }
582
583 /* queue an async procedure call */
584 int thread_queue_apc( struct thread *thread, struct object *owner, void *func,
585 enum apc_type type, int system, void *arg1, void *arg2, void *arg3 )
586 {
587 struct thread_apc *apc;
588 struct apc_queue *queue = system ? &thread->system_apc : &thread->user_apc;
589
590 /* cancel a possible previous APC with the same owner */
591 if (owner) thread_cancel_apc( thread, owner, system );
592 if (thread->state == TERMINATED) return 0;
593
594 if (!(apc = mem_alloc( sizeof(*apc) ))) return 0;
595 apc->prev = queue->tail;
596 apc->next = NULL;
597 apc->owner = owner;
598 apc->func = func;
599 apc->type = type;
600 apc->arg1 = arg1;
601 apc->arg2 = arg2;
602 apc->arg3 = arg3;
603 queue->tail = apc;
604 if (!apc->prev) /* first one */
605 {
606 queue->head = apc;
607 wake_thread( thread );
608 }
609 else apc->prev->next = apc;
610
611 return 1;
612 }
613
614 /* cancel the async procedure call owned by a specific object */
615 void thread_cancel_apc( struct thread *thread, struct object *owner, int system )
616 {
617 struct thread_apc *apc;
618 struct apc_queue *queue = system ? &thread->system_apc : &thread->user_apc;
619 for (apc = queue->head; apc; apc = apc->next)
620 {
621 if (apc->owner != owner) continue;
622 if (apc->next) apc->next->prev = apc->prev;
623 else queue->tail = apc->prev;
624 if (apc->prev) apc->prev->next = apc->next;
625 else queue->head = apc->next;
626 free( apc );
627 return;
628 }
629 }
630
631 /* remove the head apc from the queue; the returned pointer must be freed by the caller */
632 static struct thread_apc *thread_dequeue_apc( struct thread *thread, int system_only )
633 {
634 struct thread_apc *apc;
635 struct apc_queue *queue = &thread->system_apc;
636
637 if (!queue->head && !system_only) queue = &thread->user_apc;
638 if ((apc = queue->head))
639 {
640 if (apc->next) apc->next->prev = NULL;
641 else queue->tail = NULL;
642 queue->head = apc->next;
643 }
644 return apc;
645 }
646
647 /* add an fd to the inflight list */
648 /* return list index, or -1 on error */
649 int thread_add_inflight_fd( struct thread *thread, int client, int server )
650 {
651 int i;
652
653 if (server == -1) return -1;
654 if (client == -1)
655 {
656 close( server );
657 return -1;
658 }
659
660 /* first check if we already have an entry for this fd */
661 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
662 if (thread->inflight[i].client == client)
663 {
664 close( thread->inflight[i].server );
665 thread->inflight[i].server = server;
666 return i;
667 }
668
669 /* now find a free spot to store it */
670 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
671 if (thread->inflight[i].client == -1)
672 {
673 thread->inflight[i].client = client;
674 thread->inflight[i].server = server;
675 return i;
676 }
677 return -1;
678 }
679
680 /* get an inflight fd and purge it from the list */
681 /* the fd must be closed when no longer used */
682 int thread_get_inflight_fd( struct thread *thread, int client )
683 {
684 int i, ret;
685
686 if (client == -1) return -1;
687
688 do
689 {
690 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
691 {
692 if (thread->inflight[i].client == client)
693 {
694 ret = thread->inflight[i].server;
695 thread->inflight[i].server = thread->inflight[i].client = -1;
696 return ret;
697 }
698 }
699 } while (!receive_fd( thread->process )); /* in case it is still in the socket buffer */
700 return -1;
701 }
702
703 /* retrieve an LDT selector entry */
704 static void get_selector_entry( struct thread *thread, int entry,
705 unsigned int *base, unsigned int *limit,
706 unsigned char *flags )
707 {
708 if (!thread->process->ldt_copy)
709 {
710 set_error( STATUS_ACCESS_DENIED );
711 return;
712 }
713 if (entry >= 8192)
714 {
715 set_error( STATUS_INVALID_PARAMETER ); /* FIXME */
716 return;
717 }
718 if (suspend_for_ptrace( thread ))
719 {
720 unsigned char flags_buf[4];
721 int *addr = (int *)thread->process->ldt_copy + entry;
722 if (read_thread_int( thread, addr, base ) == -1) goto done;
723 if (read_thread_int( thread, addr + 8192, limit ) == -1) goto done;
724 addr = (int *)thread->process->ldt_copy + 2*8192 + (entry >> 2);
725 if (read_thread_int( thread, addr, (int *)flags_buf ) == -1) goto done;
726 *flags = flags_buf[entry & 3];
727 done:
728 resume_after_ptrace( thread );
729 }
730 }
731
732 /* kill a thread on the spot */
733 void kill_thread( struct thread *thread, int violent_death )
734 {
735 if (thread->state == TERMINATED) return; /* already killed */
736 thread->state = TERMINATED;
737 thread->exit_time = time(NULL);
738 if (current == thread) current = NULL;
739 if (debug_level)
740 fprintf( stderr,"%04x: *killed* exit_code=%d\n",
741 thread->id, thread->exit_code );
742 if (thread->wait)
743 {
744 while (thread->wait) end_wait( thread );
745 send_thread_wakeup( thread, NULL, STATUS_PENDING );
746 /* if it is waiting on the socket, we don't need to send a SIGTERM */
747 violent_death = 0;
748 }
749 kill_console_processes( thread, 0 );
750 debug_exit_thread( thread );
751 abandon_mutexes( thread );
752 remove_process_thread( thread->process, thread );
753 wake_up( &thread->obj, 0 );
754 detach_thread( thread, violent_death ? SIGTERM : 0 );
755 cleanup_thread( thread );
756 release_object( thread );
757 }
758
759 /* take a snapshot of currently running threads */
760 struct thread_snapshot *thread_snap( int *count )
761 {
762 struct thread_snapshot *snapshot, *ptr;
763 struct thread *thread;
764 int total = 0;
765
766 for (thread = first_thread; thread; thread = thread->next)
767 if (thread->state != TERMINATED) total++;
768 if (!total || !(snapshot = mem_alloc( sizeof(*snapshot) * total ))) return NULL;
769 ptr = snapshot;
770 for (thread = first_thread; thread; thread = thread->next)
771 {
772 if (thread->state == TERMINATED) continue;
773 ptr->thread = thread;
774 ptr->count = thread->obj.refcount;
775 ptr->priority = thread->priority;
776 grab_object( thread );
777 ptr++;
778 }
779 *count = total;
780 return snapshot;
781 }
782
783 /* signal that we are finished booting on the client side */
784 DECL_HANDLER(boot_done)
785 {
786 debug_level = max( debug_level, req->debug_level );
787 if (current == booting_thread)
788 {
789 booting_thread = (struct thread *)~0UL; /* make sure it doesn't match other threads */
790 lock_master_socket(0); /* allow other clients now */
791 }
792 }
793
794 /* create a new thread */
795 DECL_HANDLER(new_thread)
796 {
797 struct thread *thread;
798 int request_fd = thread_get_inflight_fd( current, req->request_fd );
799
800 if (request_fd == -1 || fcntl( request_fd, F_SETFL, O_NONBLOCK ) == -1)
801 {
802 if (request_fd != -1) close( request_fd );
803 set_error( STATUS_INVALID_HANDLE );
804 return;
805 }
806
807 if ((thread = create_thread( request_fd, current->process )))
808 {
809 if (req->suspend) thread->suspend++;
810 reply->tid = get_thread_id( thread );
811 if ((reply->handle = alloc_handle( current->process, thread,
812 THREAD_ALL_ACCESS, req->inherit )))
813 {
814 /* thread object will be released when the thread gets killed */
815 return;
816 }
817 kill_thread( thread, 1 );
818 }
819 }
820
821 /* initialize a new thread */
822 DECL_HANDLER(init_thread)
823 {
824 int reply_fd = thread_get_inflight_fd( current, req->reply_fd );
825 int wait_fd = thread_get_inflight_fd( current, req->wait_fd );
826
827 if (current->unix_pid != -1)
828 {
829 fatal_protocol_error( current, "init_thread: already running\n" );
830 goto error;
831 }
832 if (reply_fd == -1 || fcntl( reply_fd, F_SETFL, O_NONBLOCK ) == -1)
833 {
834 fatal_protocol_error( current, "bad reply fd\n" );
835 goto error;
836 }
837 if (wait_fd == -1)
838 {
839 fatal_protocol_error( current, "bad wait fd\n" );
840 goto error;
841 }
842 current->reply_fd = create_anonymous_fd( &thread_fd_ops, reply_fd, &current->obj );
843 current->wait_fd = create_anonymous_fd( &thread_fd_ops, wait_fd, &current->obj );
844 if (!current->reply_fd || !current->wait_fd) return;
845
846 current->unix_pid = req->unix_pid;
847 current->unix_tid = req->unix_tid;
848 current->teb = req->teb;
849
850 if (current->suspend + current->process->suspend > 0) stop_thread( current );
851 if (current->process->running_threads > 1)
852 generate_debug_event( current, CREATE_THREAD_DEBUG_EVENT, req->entry );
853
854 reply->pid = get_process_id( current->process );
855 reply->tid = get_thread_id( current );
856 reply->boot = (current == booting_thread);
857 reply->version = SERVER_PROTOCOL_VERSION;
858 return;
859
860 error:
861 if (reply_fd != -1) close( reply_fd );
862 if (wait_fd != -1) close( wait_fd );
863 }
864
865 /* terminate a thread */
866 DECL_HANDLER(terminate_thread)
867 {
868 struct thread *thread;
869
870 reply->self = 0;
871 reply->last = 0;
872 if ((thread = get_thread_from_handle( req->handle, THREAD_TERMINATE )))
873 {
874 thread->exit_code = req->exit_code;
875 if (thread != current) kill_thread( thread, 1 );
876 else
877 {
878 reply->self = 1;
879 reply->last = (thread->process->running_threads == 1);
880 }
881 release_object( thread );
882 }
883 }
884
885 /* open a handle to a thread */
886 DECL_HANDLER(open_thread)
887 {
888 struct thread *thread = get_thread_from_id( req->tid );
889
890 reply->handle = 0;
891 if (thread)
892 {
893 reply->handle = alloc_handle( current->process, thread, req->access, req->inherit );
894 release_object( thread );
895 }
896 }
897
898 /* fetch information about a thread */
899 DECL_HANDLER(get_thread_info)
900 {
901 struct thread *thread;
902 obj_handle_t handle = req->handle;
903
904 if (!handle) thread = get_thread_from_id( req->tid_in );
905 else thread = get_thread_from_handle( req->handle, THREAD_QUERY_INFORMATION );
906
907 if (thread)
908 {
909 reply->tid = get_thread_id( thread );
910 reply->teb = thread->teb;
911 reply->exit_code = (thread->state == TERMINATED) ? thread->exit_code : STILL_ACTIVE;
912 reply->priority = thread->priority;
913 reply->creation_time = thread->creation_time;
914 reply->exit_time = thread->exit_time;
915
916 release_object( thread );
917 }
918 }
919
920 /* set information about a thread */
921 DECL_HANDLER(set_thread_info)
922 {
923 struct thread *thread;
924
925 if ((thread = get_thread_from_handle( req->handle, THREAD_SET_INFORMATION )))
926 {
927 set_thread_info( thread, req );
928 release_object( thread );
929 }
930 }
931
932 /* suspend a thread */
933 DECL_HANDLER(suspend_thread)
934 {
935 struct thread *thread;
936
937 if ((thread = get_thread_from_handle( req->handle, THREAD_SUSPEND_RESUME )))
938 {
939 if (thread->state == TERMINATED) set_error( STATUS_ACCESS_DENIED );
940 else reply->count = suspend_thread( thread );
941 release_object( thread );
942 }
943 }
944
945 /* resume a thread */
946 DECL_HANDLER(resume_thread)
947 {
948 struct thread *thread;
949
950 if ((thread = get_thread_from_handle( req->handle, THREAD_SUSPEND_RESUME )))
951 {
952 if (thread->state == TERMINATED) set_error( STATUS_ACCESS_DENIED );
953 else reply->count = resume_thread( thread );
954 release_object( thread );
955 }
956 }
957
958 /* select on a handle list */
959 DECL_HANDLER(select)
960 {
961 int count = get_req_data_size() / sizeof(int);
962 select_on( count, req->cookie, get_req_data(), req->flags, &req->timeout );
963 }
964
965 /* queue an APC for a thread */
966 DECL_HANDLER(queue_apc)
967 {
968 struct thread *thread;
969 if ((thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT )))
970 {
971 thread_queue_apc( thread, NULL, req->func, APC_USER, !req->user,
972 req->arg1, req->arg2, req->arg3 );
973 release_object( thread );
974 }
975 }
976
977 /* get next APC to call */
978 DECL_HANDLER(get_apc)
979 {
980 struct thread_apc *apc;
981
982 for (;;)
983 {
984 if (!(apc = thread_dequeue_apc( current, !req->alertable )))
985 {
986 /* no more APCs */
987 reply->func = NULL;
988 reply->type = APC_NONE;
989 return;
990 }
991 /* Optimization: ignore APCs that have a NULL func; they are only used
992 * to wake up a thread, but since we got here the thread woke up already.
993 * Exception: for APC_ASYNC_IO, func == NULL is legal.
994 */
995 if (apc->func || apc->type == APC_ASYNC_IO) break;
996 free( apc );
997 }
998 reply->func = apc->func;
999 reply->type = apc->type;
1000 reply->arg1 = apc->arg1;
1001 reply->arg2 = apc->arg2;
1002 reply->arg3 = apc->arg3;
1003 free( apc );
1004 }
1005
1006 /* fetch a selector entry for a thread */
1007 DECL_HANDLER(get_selector_entry)
1008 {
1009 struct thread *thread;
1010 if ((thread = get_thread_from_handle( req->handle, THREAD_QUERY_INFORMATION )))
1011 {
1012 get_selector_entry( thread, req->entry, &reply->base, &reply->limit, &reply->flags );
1013 release_object( thread );
1014 }
1015 }
Maarten's multimedia branch