2 * Server-side thread management
4 * Copyright (C) 1998 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
22 #include "wine/port.h"
32 #include <sys/types.h>
54 struct thread_wait *next; /* next wait structure for this thread */
55 struct thread *thread; /* owner thread */
56 int count; /* count of objects */
58 void *cookie; /* magic cookie to return to client */
59 struct timeval timeout;
60 struct timeout_user *user;
61 struct wait_queue_entry queues[1];
64 /* asynchronous procedure calls */
68 struct list entry; /* queue linked list */
69 struct object *owner; /* object that queued this apc */
70 void *func; /* function to call in client */
71 enum apc_type type; /* type of apc function */
72 int nb_args; /* number of arguments */
73 void *arg1; /* function arguments */
79 /* thread operations */
81 static void dump_thread( struct object *obj, int verbose );
82 static int thread_signaled( struct object *obj, struct thread *thread );
83 static void thread_poll_event( struct fd *fd, int event );
84 static void destroy_thread( struct object *obj );
85 static struct thread_apc *thread_dequeue_apc( struct thread *thread, int system_only );
87 static const struct object_ops thread_ops =
89 sizeof(struct thread), /* size */
90 dump_thread, /* dump */
91 add_queue, /* add_queue */
92 remove_queue, /* remove_queue */
93 thread_signaled, /* signaled */
94 no_satisfied, /* satisfied */
95 no_signal, /* signal */
96 no_get_fd, /* get_fd */
97 no_close_handle, /* close_handle */
98 destroy_thread /* destroy */
101 static const struct fd_ops thread_fd_ops =
103 NULL, /* get_poll_events */
104 thread_poll_event, /* poll_event */
105 no_flush, /* flush */
106 no_get_file_info, /* get_file_info */
107 no_queue_async, /* queue_async */
108 no_cancel_async /* cancel_async */
111 static struct list thread_list = LIST_INIT(thread_list);
113 /* initialize the structure for a newly allocated thread */
114 inline static void init_thread_structure( struct thread *thread )
118 thread->unix_pid = -1; /* not known yet */
119 thread->unix_tid = -1; /* not known yet */
120 thread->context = NULL;
122 thread->debug_ctx = NULL;
123 thread->debug_event = NULL;
124 thread->queue = NULL;
127 thread->req_data = NULL;
128 thread->req_toread = 0;
129 thread->reply_data = NULL;
130 thread->reply_towrite = 0;
131 thread->request_fd = NULL;
132 thread->reply_fd = NULL;
133 thread->wait_fd = NULL;
134 thread->state = RUNNING;
135 thread->attached = 0;
136 thread->exit_code = 0;
137 thread->priority = THREAD_PRIORITY_NORMAL;
138 thread->affinity = 1;
140 thread->creation_time = time(NULL);
141 thread->exit_time = 0;
142 thread->desktop_users = 0;
144 list_init( &thread->mutex_list );
145 list_init( &thread->system_apc );
146 list_init( &thread->user_apc );
148 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
149 thread->inflight[i].server = thread->inflight[i].client = -1;
152 /* check if address looks valid for a client-side data structure (TEB etc.) */
153 static inline int is_valid_address( void *addr )
155 return addr && !((unsigned int)addr % sizeof(int));
158 /* create a new thread */
159 struct thread *create_thread( int fd, struct process *process )
161 struct thread *thread;
163 if (!(thread = alloc_object( &thread_ops ))) return NULL;
165 init_thread_structure( thread );
167 thread->process = (struct process *)grab_object( process );
168 thread->desktop = process->desktop;
169 if (!current) current = thread;
171 list_add_head( &thread_list, &thread->entry );
173 if (!(thread->id = alloc_ptid( thread )))
175 release_object( thread );
178 if (!(thread->request_fd = create_anonymous_fd( &thread_fd_ops, fd, &thread->obj )))
180 release_object( thread );
184 thread->token = (struct token *) grab_object( process->token );
186 set_fd_events( thread->request_fd, POLLIN ); /* start listening to events */
187 add_process_thread( thread->process, thread );
191 /* handle a client event */
192 static void thread_poll_event( struct fd *fd, int event )
194 struct thread *thread = get_fd_user( fd );
195 assert( thread->obj.ops == &thread_ops );
197 if (event & (POLLERR | POLLHUP)) kill_thread( thread, 0 );
198 else if (event & POLLIN) read_request( thread );
199 else if (event & POLLOUT) write_reply( thread );
202 /* cleanup everything that is no longer needed by a dead thread */
203 /* used by destroy_thread and kill_thread */
204 static void cleanup_thread( struct thread *thread )
207 struct thread_apc *apc;
209 while ((apc = thread_dequeue_apc( thread, 0 ))) free( apc );
210 if (thread->req_data) free( thread->req_data );
211 if (thread->reply_data) free( thread->reply_data );
212 if (thread->request_fd) release_object( thread->request_fd );
213 if (thread->reply_fd) release_object( thread->reply_fd );
214 if (thread->wait_fd) release_object( thread->wait_fd );
215 free_msg_queue( thread );
216 cleanup_clipboard_thread(thread);
217 destroy_thread_windows( thread );
218 close_thread_desktop( thread );
219 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
221 if (thread->inflight[i].client != -1)
223 close( thread->inflight[i].server );
224 thread->inflight[i].client = thread->inflight[i].server = -1;
227 thread->req_data = NULL;
228 thread->reply_data = NULL;
229 thread->request_fd = NULL;
230 thread->reply_fd = NULL;
231 thread->wait_fd = NULL;
235 /* destroy a thread when its refcount is 0 */
236 static void destroy_thread( struct object *obj )
238 struct thread_apc *apc;
239 struct thread *thread = (struct thread *)obj;
240 assert( obj->ops == &thread_ops );
242 assert( !thread->debug_ctx ); /* cannot still be debugging something */
243 list_remove( &thread->entry );
244 while ((apc = thread_dequeue_apc( thread, 0 ))) free( apc );
245 cleanup_thread( thread );
246 release_object( thread->process );
247 if (thread->id) free_ptid( thread->id );
248 if (thread->token) release_object( thread->token );
251 /* dump a thread on stdout for debugging purposes */
252 static void dump_thread( struct object *obj, int verbose )
254 struct thread *thread = (struct thread *)obj;
255 assert( obj->ops == &thread_ops );
257 fprintf( stderr, "Thread id=%04x unix pid=%d unix tid=%d teb=%p state=%d\n",
258 thread->id, thread->unix_pid, thread->unix_tid, thread->teb, thread->state );
261 static int thread_signaled( struct object *obj, struct thread *thread )
263 struct thread *mythread = (struct thread *)obj;
264 return (mythread->state == TERMINATED);
267 /* get a thread pointer from a thread id (and increment the refcount) */
268 struct thread *get_thread_from_id( thread_id_t id )
270 struct object *obj = get_ptid_entry( id );
272 if (obj && obj->ops == &thread_ops) return (struct thread *)grab_object( obj );
273 set_error( STATUS_INVALID_CID );
277 /* get a thread from a handle (and increment the refcount) */
278 struct thread *get_thread_from_handle( obj_handle_t handle, unsigned int access )
280 return (struct thread *)get_handle_obj( current->process, handle,
281 access, &thread_ops );
284 /* find a thread from a Unix pid */
285 struct thread *get_thread_from_pid( int pid )
287 struct thread *thread;
289 LIST_FOR_EACH_ENTRY( thread, &thread_list, struct thread, entry )
291 if (thread->unix_tid == pid) return thread;
293 LIST_FOR_EACH_ENTRY( thread, &thread_list, struct thread, entry )
295 if (thread->unix_pid == pid) return thread;
300 /* set all information about a thread */
301 static void set_thread_info( struct thread *thread,
302 const struct set_thread_info_request *req )
304 if (req->mask & SET_THREAD_INFO_PRIORITY)
305 thread->priority = req->priority;
306 if (req->mask & SET_THREAD_INFO_AFFINITY)
308 if (req->affinity != 1) set_error( STATUS_INVALID_PARAMETER );
309 else thread->affinity = req->affinity;
311 if (req->mask & SET_THREAD_INFO_TOKEN)
312 security_set_thread_token( thread, req->token );
315 /* stop a thread (at the Unix level) */
316 void stop_thread( struct thread *thread )
318 if (thread->context) return; /* already inside a debug event, no need for a signal */
319 /* can't stop a thread while initialisation is in progress */
320 if (is_process_init_done(thread->process)) send_thread_signal( thread, SIGUSR1 );
323 /* suspend a thread */
324 static int suspend_thread( struct thread *thread )
326 int old_count = thread->suspend;
327 if (thread->suspend < MAXIMUM_SUSPEND_COUNT)
329 if (!(thread->process->suspend + thread->suspend++)) stop_thread( thread );
331 else set_error( STATUS_SUSPEND_COUNT_EXCEEDED );
335 /* resume a thread */
336 static int resume_thread( struct thread *thread )
338 int old_count = thread->suspend;
339 if (thread->suspend > 0)
341 if (!(--thread->suspend + thread->process->suspend)) wake_thread( thread );
346 /* add a thread to an object wait queue; return 1 if OK, 0 on error */
347 int add_queue( struct object *obj, struct wait_queue_entry *entry )
351 list_add_tail( &obj->wait_queue, &entry->entry );
355 /* remove a thread from an object wait queue */
356 void remove_queue( struct object *obj, struct wait_queue_entry *entry )
358 list_remove( &entry->entry );
359 release_object( obj );
363 static void end_wait( struct thread *thread )
365 struct thread_wait *wait = thread->wait;
366 struct wait_queue_entry *entry;
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;
377 /* build the thread wait structure */
378 static int wait_on( int count, struct object *objects[], int flags, const abs_time_t *timeout )
380 struct thread_wait *wait;
381 struct wait_queue_entry *entry;
384 if (!(wait = mem_alloc( sizeof(*wait) + (count-1) * sizeof(*entry) ))) return 0;
385 wait->next = current->wait;
386 wait->thread = current;
390 current->wait = wait;
391 if (flags & SELECT_TIMEOUT)
393 wait->timeout.tv_sec = timeout->sec;
394 wait->timeout.tv_usec = timeout->usec;
397 for (i = 0, entry = wait->queues; i < count; i++, entry++)
399 struct object *obj = objects[i];
400 entry->thread = current;
401 if (!obj->ops->add_queue( obj, entry ))
411 /* check if the thread waiting condition is satisfied */
412 static int check_wait( struct thread *thread )
415 struct thread_wait *wait = thread->wait;
416 struct wait_queue_entry *entry = wait->queues;
418 /* Suspended threads may not acquire locks */
419 if (thread->process->suspend + thread->suspend > 0) return -1;
422 if (wait->flags & SELECT_ALL)
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 */
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;
439 for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
441 if (!entry->obj->ops->signaled( entry->obj, thread )) continue;
442 /* Wait satisfied: tell it to the object */
444 if (entry->obj->ops->satisfied( entry->obj, thread ))
445 signaled = i + STATUS_ABANDONED_WAIT_0;
451 if ((wait->flags & SELECT_INTERRUPTIBLE) && !list_empty(&thread->system_apc)) return STATUS_USER_APC;
452 if ((wait->flags & SELECT_ALERTABLE) && !list_empty(&thread->user_apc)) return STATUS_USER_APC;
453 if (wait->flags & SELECT_TIMEOUT)
456 gettimeofday( &now, NULL );
457 if (!time_before( &now, &wait->timeout )) return STATUS_TIMEOUT;
462 /* send the wakeup signal to a thread */
463 static int send_thread_wakeup( struct thread *thread, void *cookie, int signaled )
465 struct wake_up_reply reply;
468 reply.cookie = cookie;
469 reply.signaled = signaled;
470 if ((ret = write( get_unix_fd( thread->wait_fd ), &reply, sizeof(reply) )) == sizeof(reply))
473 fatal_protocol_error( thread, "partial wakeup write %d\n", ret );
474 else if (errno == EPIPE)
475 kill_thread( thread, 0 ); /* normal death */
477 fatal_protocol_perror( thread, "write" );
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 )
488 for (count = 0; thread->wait; count++)
490 if ((signaled = check_wait( thread )) == -1) break;
492 cookie = thread->wait->cookie;
493 if (debug_level) fprintf( stderr, "%04x: *wakeup* signaled=%d cookie=%p\n",
494 thread->id, signaled, cookie );
496 if (send_thread_wakeup( thread, cookie, signaled ) == -1) /* error */
502 /* thread wait timeout */
503 static void thread_timeout( void *ptr )
505 struct thread_wait *wait = ptr;
506 struct thread *thread = wait->thread;
507 void *cookie = wait->cookie;
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 */
513 if (debug_level) fprintf( stderr, "%04x: *wakeup* signaled=%d cookie=%p\n",
514 thread->id, STATUS_TIMEOUT, cookie );
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 );
521 /* try signaling an event flag, a semaphore or a mutex */
522 static int signal_object( obj_handle_t handle )
527 obj = get_handle_obj( current->process, handle, 0, NULL );
530 ret = obj->ops->signal( obj, get_handle_access( current->process, handle ));
531 release_object( obj );
536 /* select on a list of handles */
537 static void select_on( int count, void *cookie, const obj_handle_t *handles,
538 int flags, const abs_time_t *timeout, obj_handle_t signal_obj )
541 struct object *objects[MAXIMUM_WAIT_OBJECTS];
543 if ((count < 0) || (count > MAXIMUM_WAIT_OBJECTS))
545 set_error( STATUS_INVALID_PARAMETER );
548 for (i = 0; i < count; i++)
550 if (!(objects[i] = get_handle_obj( current->process, handles[i], SYNCHRONIZE, NULL )))
554 if (i < count) goto done;
555 if (!wait_on( count, objects, flags, timeout )) goto done;
557 /* signal the object */
560 if (!signal_object( signal_obj ))
565 /* check if we woke ourselves up */
566 if (!current->wait) goto done;
569 if ((ret = check_wait( current )) != -1)
571 /* condition is already satisfied */
577 /* now we need to wait */
578 if (flags & SELECT_TIMEOUT)
580 if (!(current->wait->user = add_timeout_user( ¤t->wait->timeout,
581 thread_timeout, current->wait )))
587 current->wait->cookie = cookie;
588 set_error( STATUS_PENDING );
591 while (--i >= 0) release_object( objects[i] );
594 /* attempt to wake threads sleeping on the object wait queue */
595 void wake_up( struct object *obj, int max )
597 struct list *ptr, *next;
599 LIST_FOR_EACH_SAFE( ptr, next, &obj->wait_queue )
601 struct wait_queue_entry *entry = LIST_ENTRY( ptr, struct wait_queue_entry, entry );
602 if (wake_thread( entry->thread ))
604 if (max && !--max) break;
609 /* queue an async procedure call */
610 int thread_queue_apc( struct thread *thread, struct object *owner, void *func,
611 enum apc_type type, int system, void *arg1, void *arg2, void *arg3 )
613 struct thread_apc *apc;
614 struct list *queue = system ? &thread->system_apc : &thread->user_apc;
616 /* cancel a possible previous APC with the same owner */
617 if (owner) thread_cancel_apc( thread, owner, system );
618 if (thread->state == TERMINATED) return 0;
620 if (!(apc = mem_alloc( sizeof(*apc) ))) return 0;
627 list_add_tail( queue, &apc->entry );
628 if (!list_prev( queue, &apc->entry )) /* first one */
629 wake_thread( thread );
634 /* cancel the async procedure call owned by a specific object */
635 void thread_cancel_apc( struct thread *thread, struct object *owner, int system )
637 struct thread_apc *apc;
638 struct list *queue = system ? &thread->system_apc : &thread->user_apc;
639 LIST_FOR_EACH_ENTRY( apc, queue, struct thread_apc, entry )
641 if (apc->owner != owner) continue;
642 list_remove( &apc->entry );
648 /* remove the head apc from the queue; the returned pointer must be freed by the caller */
649 static struct thread_apc *thread_dequeue_apc( struct thread *thread, int system_only )
651 struct thread_apc *apc = NULL;
652 struct list *ptr = list_head( &thread->system_apc );
654 if (!ptr && !system_only) ptr = list_head( &thread->user_apc );
657 apc = LIST_ENTRY( ptr, struct thread_apc, entry );
663 /* add an fd to the inflight list */
664 /* return list index, or -1 on error */
665 int thread_add_inflight_fd( struct thread *thread, int client, int server )
669 if (server == -1) return -1;
676 /* first check if we already have an entry for this fd */
677 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
678 if (thread->inflight[i].client == client)
680 close( thread->inflight[i].server );
681 thread->inflight[i].server = server;
685 /* now find a free spot to store it */
686 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
687 if (thread->inflight[i].client == -1)
689 thread->inflight[i].client = client;
690 thread->inflight[i].server = server;
696 /* get an inflight fd and purge it from the list */
697 /* the fd must be closed when no longer used */
698 int thread_get_inflight_fd( struct thread *thread, int client )
702 if (client == -1) return -1;
706 for (i = 0; i < MAX_INFLIGHT_FDS; i++)
708 if (thread->inflight[i].client == client)
710 ret = thread->inflight[i].server;
711 thread->inflight[i].server = thread->inflight[i].client = -1;
715 } while (!receive_fd( thread->process )); /* in case it is still in the socket buffer */
719 /* retrieve an LDT selector entry */
720 static void get_selector_entry( struct thread *thread, int entry,
721 unsigned int *base, unsigned int *limit,
722 unsigned char *flags )
724 if (!thread->process->ldt_copy)
726 set_error( STATUS_ACCESS_DENIED );
731 set_error( STATUS_INVALID_PARAMETER ); /* FIXME */
734 if (suspend_for_ptrace( thread ))
736 unsigned char flags_buf[4];
737 int *addr = (int *)thread->process->ldt_copy + entry;
738 if (read_thread_int( thread, addr, (int *)base ) == -1) goto done;
739 if (read_thread_int( thread, addr + 8192, (int *)limit ) == -1) goto done;
740 addr = (int *)thread->process->ldt_copy + 2*8192 + (entry >> 2);
741 if (read_thread_int( thread, addr, (int *)flags_buf ) == -1) goto done;
742 *flags = flags_buf[entry & 3];
744 resume_after_ptrace( thread );
748 /* kill a thread on the spot */
749 void kill_thread( struct thread *thread, int violent_death )
751 if (thread->state == TERMINATED) return; /* already killed */
752 thread->state = TERMINATED;
753 thread->exit_time = time(NULL);
754 if (current == thread) current = NULL;
756 fprintf( stderr,"%04x: *killed* exit_code=%d\n",
757 thread->id, thread->exit_code );
760 while (thread->wait) end_wait( thread );
761 send_thread_wakeup( thread, NULL, STATUS_PENDING );
762 /* if it is waiting on the socket, we don't need to send a SIGTERM */
765 kill_console_processes( thread, 0 );
766 debug_exit_thread( thread );
767 abandon_mutexes( thread );
768 wake_up( &thread->obj, 0 );
769 if (violent_death) send_thread_signal( thread, SIGTERM );
770 cleanup_thread( thread );
771 remove_process_thread( thread->process, thread );
772 release_object( thread );
775 /* take a snapshot of currently running threads */
776 struct thread_snapshot *thread_snap( int *count )
778 struct thread_snapshot *snapshot, *ptr;
779 struct thread *thread;
782 LIST_FOR_EACH_ENTRY( thread, &thread_list, struct thread, entry )
783 if (thread->state != TERMINATED) total++;
784 if (!total || !(snapshot = mem_alloc( sizeof(*snapshot) * total ))) return NULL;
786 LIST_FOR_EACH_ENTRY( thread, &thread_list, struct thread, entry )
788 if (thread->state == TERMINATED) continue;
789 ptr->thread = thread;
790 ptr->count = thread->obj.refcount;
791 ptr->priority = thread->priority;
792 grab_object( thread );
799 /* gets the current impersonation token */
800 struct token *thread_get_impersonation_token( struct thread *thread )
803 return thread->token;
805 return thread->process->token;
808 /* create a new thread */
809 DECL_HANDLER(new_thread)
811 struct thread *thread;
812 int request_fd = thread_get_inflight_fd( current, req->request_fd );
814 if (request_fd == -1 || fcntl( request_fd, F_SETFL, O_NONBLOCK ) == -1)
816 if (request_fd != -1) close( request_fd );
817 set_error( STATUS_INVALID_HANDLE );
821 if ((thread = create_thread( request_fd, current->process )))
823 if (req->suspend) thread->suspend++;
824 reply->tid = get_thread_id( thread );
825 if ((reply->handle = alloc_handle( current->process, thread,
826 THREAD_ALL_ACCESS, req->inherit )))
828 /* thread object will be released when the thread gets killed */
831 kill_thread( thread, 1 );
835 /* initialize a new thread */
836 DECL_HANDLER(init_thread)
838 struct process *process = current->process;
839 int reply_fd = thread_get_inflight_fd( current, req->reply_fd );
840 int wait_fd = thread_get_inflight_fd( current, req->wait_fd );
842 if (current->unix_pid != -1)
844 fatal_protocol_error( current, "init_thread: already running\n" );
847 if (reply_fd == -1 || fcntl( reply_fd, F_SETFL, O_NONBLOCK ) == -1)
849 fatal_protocol_error( current, "bad reply fd\n" );
854 fatal_protocol_error( current, "bad wait fd\n" );
857 if (!(current->reply_fd = create_anonymous_fd( &thread_fd_ops, reply_fd, ¤t->obj )))
860 fatal_protocol_error( current, "could not allocate reply fd\n" );
863 if (!(current->wait_fd = create_anonymous_fd( &thread_fd_ops, wait_fd, ¤t->obj )))
866 if (!is_valid_address(req->teb) || !is_valid_address(req->peb) || !is_valid_address(req->ldt_copy))
868 set_error( STATUS_INVALID_PARAMETER );
872 current->unix_pid = req->unix_pid;
873 current->unix_tid = req->unix_tid;
874 current->teb = req->teb;
876 if (!process->peb) /* first thread, initialize the process too */
878 process->peb = req->peb;
879 process->ldt_copy = req->ldt_copy;
880 reply->info_size = init_process( current );
884 if (current->suspend + process->suspend > 0) stop_thread( current );
885 generate_debug_event( current, CREATE_THREAD_DEBUG_EVENT, req->entry );
887 debug_level = max( debug_level, req->debug_level );
889 reply->pid = get_process_id( process );
890 reply->tid = get_thread_id( current );
891 reply->version = SERVER_PROTOCOL_VERSION;
892 reply->server_start = server_start_time;
896 if (reply_fd != -1) close( reply_fd );
897 if (wait_fd != -1) close( wait_fd );
900 /* terminate a thread */
901 DECL_HANDLER(terminate_thread)
903 struct thread *thread;
907 if ((thread = get_thread_from_handle( req->handle, THREAD_TERMINATE )))
909 thread->exit_code = req->exit_code;
910 if (thread != current) kill_thread( thread, 1 );
914 reply->last = (thread->process->running_threads == 1);
916 release_object( thread );
920 /* open a handle to a thread */
921 DECL_HANDLER(open_thread)
923 struct thread *thread = get_thread_from_id( req->tid );
928 reply->handle = alloc_handle( current->process, thread, req->access, req->inherit );
929 release_object( thread );
933 /* fetch information about a thread */
934 DECL_HANDLER(get_thread_info)
936 struct thread *thread;
937 obj_handle_t handle = req->handle;
939 if (!handle) thread = get_thread_from_id( req->tid_in );
940 else thread = get_thread_from_handle( req->handle, THREAD_QUERY_INFORMATION );
944 reply->pid = get_process_id( thread->process );
945 reply->tid = get_thread_id( thread );
946 reply->teb = thread->teb;
947 reply->exit_code = (thread->state == TERMINATED) ? thread->exit_code : STILL_ACTIVE;
948 reply->priority = thread->priority;
949 reply->affinity = thread->affinity;
950 reply->creation_time = thread->creation_time;
951 reply->exit_time = thread->exit_time;
953 release_object( thread );
957 /* set information about a thread */
958 DECL_HANDLER(set_thread_info)
960 struct thread *thread;
962 if ((thread = get_thread_from_handle( req->handle, THREAD_SET_INFORMATION )))
964 set_thread_info( thread, req );
965 release_object( thread );
969 /* suspend a thread */
970 DECL_HANDLER(suspend_thread)
972 struct thread *thread;
974 if ((thread = get_thread_from_handle( req->handle, THREAD_SUSPEND_RESUME )))
976 if (thread->state == TERMINATED) set_error( STATUS_ACCESS_DENIED );
977 else reply->count = suspend_thread( thread );
978 release_object( thread );
982 /* resume a thread */
983 DECL_HANDLER(resume_thread)
985 struct thread *thread;
987 if ((thread = get_thread_from_handle( req->handle, THREAD_SUSPEND_RESUME )))
989 if (thread->state == TERMINATED) set_error( STATUS_ACCESS_DENIED );
990 else reply->count = resume_thread( thread );
991 release_object( thread );
995 /* select on a handle list */
998 int count = get_req_data_size() / sizeof(int);
999 select_on( count, req->cookie, get_req_data(), req->flags, &req->timeout, req->signal );
1002 /* queue an APC for a thread */
1003 DECL_HANDLER(queue_apc)
1005 struct thread *thread;
1006 if ((thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT )))
1008 thread_queue_apc( thread, NULL, req->func, APC_USER, !req->user,
1009 req->arg1, req->arg2, req->arg3 );
1010 release_object( thread );
1014 /* get next APC to call */
1015 DECL_HANDLER(get_apc)
1017 struct thread_apc *apc;
1021 if (!(apc = thread_dequeue_apc( current, !req->alertable )))
1025 reply->type = APC_NONE;
1028 /* Optimization: ignore APCs that have a NULL func; they are only used
1029 * to wake up a thread, but since we got here the thread woke up already.
1030 * Exception: for APC_ASYNC_IO, func == NULL is legal.
1032 if (apc->func || apc->type == APC_ASYNC_IO) break;
1035 reply->func = apc->func;
1036 reply->type = apc->type;
1037 reply->arg1 = apc->arg1;
1038 reply->arg2 = apc->arg2;
1039 reply->arg3 = apc->arg3;
1043 /* retrieve the current context of a thread */
1044 DECL_HANDLER(get_thread_context)
1046 struct thread *thread;
1049 if (get_reply_max_size() < sizeof(CONTEXT))
1051 set_error( STATUS_INVALID_PARAMETER );
1054 if (!(thread = get_thread_from_handle( req->handle, THREAD_GET_CONTEXT ))) return;
1056 if ((data = set_reply_data_size( sizeof(CONTEXT) )))
1058 memset( data, 0, sizeof(CONTEXT) );
1059 get_thread_context( thread, data, req->flags );
1061 release_object( thread );
1064 /* set the current context of a thread */
1065 DECL_HANDLER(set_thread_context)
1067 struct thread *thread;
1069 if (get_req_data_size() < sizeof(CONTEXT))
1071 set_error( STATUS_INVALID_PARAMETER );
1074 if ((thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT )))
1076 set_thread_context( thread, get_req_data(), req->flags );
1077 release_object( thread );
1081 /* fetch a selector entry for a thread */
1082 DECL_HANDLER(get_selector_entry)
1084 struct thread *thread;
1085 if ((thread = get_thread_from_handle( req->handle, THREAD_QUERY_INFORMATION )))
1087 get_selector_entry( thread, req->entry, &reply->base, &reply->limit, &reply->flags );
1088 release_object( thread );