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
31 #include <sys/types.h>
48 struct thread_wait
*next
; /* next wait structure for this thread */
49 struct thread
*thread
; /* owner thread */
50 int count
; /* count of objects */
52 void *cookie
; /* magic cookie to return to client */
53 struct timeval timeout
;
54 struct timeout_user
*user
;
55 struct wait_queue_entry queues
[1];
58 /* asynchronous procedure calls */
62 struct thread_apc
*next
; /* queue linked list */
63 struct thread_apc
*prev
;
64 struct object
*owner
; /* object that queued this apc */
65 void *func
; /* function to call in client */
66 enum apc_type type
; /* type of apc function */
67 int nb_args
; /* number of arguments */
68 void *args
[1]; /* function arguments */
72 /* thread operations */
74 static void dump_thread( struct object
*obj
, int verbose
);
75 static int thread_signaled( struct object
*obj
, struct thread
*thread
);
76 static void thread_poll_event( struct object
*obj
, int event
);
77 static void destroy_thread( struct object
*obj
);
78 static struct thread_apc
*thread_dequeue_apc( struct thread
*thread
, int system_only
);
80 static const struct object_ops thread_ops
=
82 sizeof(struct thread
), /* size */
83 dump_thread
, /* dump */
84 add_queue
, /* add_queue */
85 remove_queue
, /* remove_queue */
86 thread_signaled
, /* signaled */
87 no_satisfied
, /* satisfied */
88 NULL
, /* get_poll_events */
89 thread_poll_event
, /* poll_event */
90 no_get_fd
, /* get_fd */
92 no_get_file_info
, /* get_file_info */
93 NULL
, /* queue_async */
94 destroy_thread
/* destroy */
97 static struct thread
*first_thread
;
98 static struct thread
*booting_thread
;
100 /* initialize the structure for a newly allocated thread */
101 inline static void init_thread_structure( struct thread
*thread
)
105 thread
->unix_pid
= 0; /* not known yet */
106 thread
->context
= NULL
;
108 thread
->mutex
= NULL
;
109 thread
->debug_ctx
= NULL
;
110 thread
->debug_event
= NULL
;
111 thread
->queue
= NULL
;
114 thread
->system_apc
.head
= NULL
;
115 thread
->system_apc
.tail
= NULL
;
116 thread
->user_apc
.head
= NULL
;
117 thread
->user_apc
.tail
= NULL
;
119 thread
->req_data
= NULL
;
120 thread
->req_toread
= 0;
121 thread
->reply_data
= NULL
;
122 thread
->reply_towrite
= 0;
123 thread
->reply_fd
= -1;
124 thread
->wait_fd
= -1;
125 thread
->state
= RUNNING
;
126 thread
->attached
= 0;
127 thread
->exit_code
= 0;
130 thread
->priority
= THREAD_PRIORITY_NORMAL
;
131 thread
->affinity
= 1;
134 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
135 thread
->inflight
[i
].server
= thread
->inflight
[i
].client
= -1;
138 /* create a new thread */
139 struct thread
*create_thread( int fd
, struct process
*process
)
141 struct thread
*thread
;
143 if (!(thread
= alloc_object( &thread_ops
, fd
))) return NULL
;
145 init_thread_structure( thread
);
147 thread
->process
= (struct process
*)grab_object( process
);
148 thread
->request_fd
= fd
;
149 if (!current
) current
= thread
;
151 if (!booting_thread
) /* first thread ever */
153 booting_thread
= thread
;
154 lock_master_socket(1);
157 if ((thread
->next
= first_thread
) != NULL
) thread
->next
->prev
= thread
;
158 first_thread
= thread
;
160 set_select_events( &thread
->obj
, POLLIN
); /* start listening to events */
161 add_process_thread( thread
->process
, thread
);
165 /* handle a client event */
166 static void thread_poll_event( struct object
*obj
, int event
)
168 struct thread
*thread
= (struct thread
*)obj
;
169 assert( obj
->ops
== &thread_ops
);
171 if (event
& (POLLERR
| POLLHUP
)) kill_thread( thread
, 0 );
172 else if (event
& POLLIN
) read_request( thread
);
173 else if (event
& POLLOUT
) write_reply( thread
);
176 /* cleanup everything that is no longer needed by a dead thread */
177 /* used by destroy_thread and kill_thread */
178 static void cleanup_thread( struct thread
*thread
)
181 struct thread_apc
*apc
;
183 while ((apc
= thread_dequeue_apc( thread
, 0 ))) free( apc
);
184 if (thread
->req_data
) free( thread
->req_data
);
185 if (thread
->reply_data
) free( thread
->reply_data
);
186 if (thread
->request_fd
!= -1) close( thread
->request_fd
);
187 if (thread
->reply_fd
!= -1) close( thread
->reply_fd
);
188 if (thread
->wait_fd
!= -1) close( thread
->wait_fd
);
191 if (thread
->process
->queue
== thread
->queue
)
193 release_object( thread
->process
->queue
);
194 thread
->process
->queue
= NULL
;
196 release_object( thread
->queue
);
197 thread
->queue
= NULL
;
199 destroy_thread_windows( thread
);
200 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
202 if (thread
->inflight
[i
].client
!= -1)
204 close( thread
->inflight
[i
].server
);
205 thread
->inflight
[i
].client
= thread
->inflight
[i
].server
= -1;
208 thread
->req_data
= NULL
;
209 thread
->reply_data
= NULL
;
210 thread
->request_fd
= -1;
211 thread
->reply_fd
= -1;
212 thread
->wait_fd
= -1;
215 /* destroy a thread when its refcount is 0 */
216 static void destroy_thread( struct object
*obj
)
218 struct thread_apc
*apc
;
219 struct thread
*thread
= (struct thread
*)obj
;
220 assert( obj
->ops
== &thread_ops
);
222 assert( !thread
->debug_ctx
); /* cannot still be debugging something */
223 if (thread
->next
) thread
->next
->prev
= thread
->prev
;
224 if (thread
->prev
) thread
->prev
->next
= thread
->next
;
225 else first_thread
= thread
->next
;
226 while ((apc
= thread_dequeue_apc( thread
, 0 ))) free( apc
);
227 if (thread
->info
) release_object( thread
->info
);
228 cleanup_thread( thread
);
229 release_object( thread
->process
);
232 /* dump a thread on stdout for debugging purposes */
233 static void dump_thread( struct object
*obj
, int verbose
)
235 struct thread
*thread
= (struct thread
*)obj
;
236 assert( obj
->ops
== &thread_ops
);
238 fprintf( stderr
, "Thread pid=%d teb=%p state=%d\n",
239 thread
->unix_pid
, thread
->teb
, thread
->state
);
242 static int thread_signaled( struct object
*obj
, struct thread
*thread
)
244 struct thread
*mythread
= (struct thread
*)obj
;
245 return (mythread
->state
== TERMINATED
);
248 /* get a thread pointer from a thread id (and increment the refcount) */
249 struct thread
*get_thread_from_id( void *id
)
251 struct thread
*t
= first_thread
;
252 while (t
&& (t
!= id
)) t
= t
->next
;
253 if (t
) grab_object( t
);
254 else set_error( STATUS_INVALID_PARAMETER
);
258 /* get a thread from a handle (and increment the refcount) */
259 struct thread
*get_thread_from_handle( handle_t handle
, unsigned int access
)
261 return (struct thread
*)get_handle_obj( current
->process
, handle
,
262 access
, &thread_ops
);
265 /* find a thread from a Unix pid */
266 struct thread
*get_thread_from_pid( int pid
)
268 struct thread
*t
= first_thread
;
269 while (t
&& (t
->unix_pid
!= pid
)) t
= t
->next
;
273 /* set all information about a thread */
274 static void set_thread_info( struct thread
*thread
,
275 const struct set_thread_info_request
*req
)
277 if (req
->mask
& SET_THREAD_INFO_PRIORITY
)
278 thread
->priority
= req
->priority
;
279 if (req
->mask
& SET_THREAD_INFO_AFFINITY
)
281 if (req
->affinity
!= 1) set_error( STATUS_INVALID_PARAMETER
);
282 else thread
->affinity
= req
->affinity
;
286 /* suspend a thread */
287 int suspend_thread( struct thread
*thread
, int check_limit
)
289 int old_count
= thread
->suspend
;
290 if (thread
->suspend
< MAXIMUM_SUSPEND_COUNT
|| !check_limit
)
292 if (!(thread
->process
->suspend
+ thread
->suspend
++)) stop_thread( thread
);
294 else set_error( STATUS_SUSPEND_COUNT_EXCEEDED
);
298 /* resume a thread */
299 int resume_thread( struct thread
*thread
)
301 int old_count
= thread
->suspend
;
302 if (thread
->suspend
> 0)
304 if (!(--thread
->suspend
+ thread
->process
->suspend
)) continue_thread( thread
);
309 /* add a thread to an object wait queue; return 1 if OK, 0 on error */
310 int add_queue( struct object
*obj
, struct wait_queue_entry
*entry
)
314 entry
->prev
= obj
->tail
;
316 if (obj
->tail
) obj
->tail
->next
= entry
;
317 else obj
->head
= entry
;
322 /* remove a thread from an object wait queue */
323 void remove_queue( struct object
*obj
, struct wait_queue_entry
*entry
)
325 if (entry
->next
) entry
->next
->prev
= entry
->prev
;
326 else obj
->tail
= entry
->prev
;
327 if (entry
->prev
) entry
->prev
->next
= entry
->next
;
328 else obj
->head
= entry
->next
;
329 release_object( obj
);
333 static void end_wait( struct thread
*thread
)
335 struct thread_wait
*wait
= thread
->wait
;
336 struct wait_queue_entry
*entry
;
340 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
341 entry
->obj
->ops
->remove_queue( entry
->obj
, entry
);
342 if (wait
->user
) remove_timeout_user( wait
->user
);
343 thread
->wait
= wait
->next
;
347 /* build the thread wait structure */
348 static int wait_on( int count
, struct object
*objects
[], int flags
, int sec
, int usec
)
350 struct thread_wait
*wait
;
351 struct wait_queue_entry
*entry
;
354 if (!(wait
= mem_alloc( sizeof(*wait
) + (count
-1) * sizeof(*entry
) ))) return 0;
355 wait
->next
= current
->wait
;
356 wait
->thread
= current
;
360 current
->wait
= wait
;
361 if (flags
& SELECT_TIMEOUT
)
363 wait
->timeout
.tv_sec
= sec
;
364 wait
->timeout
.tv_usec
= usec
;
367 for (i
= 0, entry
= wait
->queues
; i
< count
; i
++, entry
++)
369 struct object
*obj
= objects
[i
];
370 entry
->thread
= current
;
371 if (!obj
->ops
->add_queue( obj
, entry
))
381 /* check if the thread waiting condition is satisfied */
382 static int check_wait( struct thread
*thread
)
385 struct thread_wait
*wait
= thread
->wait
;
386 struct wait_queue_entry
*entry
= wait
->queues
;
389 if (wait
->flags
& SELECT_ALL
)
392 /* Note: we must check them all anyway, as some objects may
393 * want to do something when signaled, even if others are not */
394 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
395 not_ok
|= !entry
->obj
->ops
->signaled( entry
->obj
, thread
);
396 if (not_ok
) goto other_checks
;
397 /* Wait satisfied: tell it to all objects */
399 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
400 if (entry
->obj
->ops
->satisfied( entry
->obj
, thread
))
401 signaled
= STATUS_ABANDONED_WAIT_0
;
406 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
408 if (!entry
->obj
->ops
->signaled( entry
->obj
, thread
)) continue;
409 /* Wait satisfied: tell it to the object */
411 if (entry
->obj
->ops
->satisfied( entry
->obj
, thread
))
412 signaled
= i
+ STATUS_ABANDONED_WAIT_0
;
418 if ((wait
->flags
& SELECT_INTERRUPTIBLE
) && thread
->system_apc
.head
) return STATUS_USER_APC
;
419 if ((wait
->flags
& SELECT_ALERTABLE
) && thread
->user_apc
.head
) return STATUS_USER_APC
;
420 if (wait
->flags
& SELECT_TIMEOUT
)
423 gettimeofday( &now
, NULL
);
424 if (!time_before( &now
, &wait
->timeout
)) return STATUS_TIMEOUT
;
429 /* send the wakeup signal to a thread */
430 static int send_thread_wakeup( struct thread
*thread
, void *cookie
, int signaled
)
432 struct wake_up_reply reply
;
435 reply
.cookie
= cookie
;
436 reply
.signaled
= signaled
;
437 if ((ret
= write( thread
->wait_fd
, &reply
, sizeof(reply
) )) == sizeof(reply
)) return 0;
439 fatal_protocol_error( thread
, "partial wakeup write %d\n", ret
);
440 else if (errno
== EPIPE
)
441 kill_thread( thread
, 0 ); /* normal death */
443 fatal_protocol_perror( thread
, "write" );
447 /* attempt to wake up a thread */
448 /* return >0 if OK, 0 if the wait condition is still not satisfied */
449 static int wake_thread( struct thread
*thread
)
454 for (count
= 0; thread
->wait
; count
++)
456 if ((signaled
= check_wait( thread
)) == -1) break;
458 cookie
= thread
->wait
->cookie
;
459 if (debug_level
) fprintf( stderr
, "%08x: *wakeup* signaled=%d cookie=%p\n",
460 (unsigned int)thread
, signaled
, cookie
);
462 if (send_thread_wakeup( thread
, cookie
, signaled
) == -1) /* error */
468 /* thread wait timeout */
469 static void thread_timeout( void *ptr
)
471 struct thread_wait
*wait
= ptr
;
472 struct thread
*thread
= wait
->thread
;
473 void *cookie
= wait
->cookie
;
476 if (thread
->wait
!= wait
) return; /* not the top-level wait, ignore it */
478 if (debug_level
) fprintf( stderr
, "%08x: *wakeup* signaled=%d cookie=%p\n",
479 (unsigned int)thread
, STATUS_TIMEOUT
, cookie
);
481 send_thread_wakeup( thread
, cookie
, STATUS_TIMEOUT
);
482 /* check if other objects have become signaled in the meantime */
483 wake_thread( thread
);
486 /* select on a list of handles */
487 static void select_on( int count
, void *cookie
, const handle_t
*handles
,
488 int flags
, int sec
, int usec
)
491 struct object
*objects
[MAXIMUM_WAIT_OBJECTS
];
493 if ((count
< 0) || (count
> MAXIMUM_WAIT_OBJECTS
))
495 set_error( STATUS_INVALID_PARAMETER
);
498 for (i
= 0; i
< count
; i
++)
500 if (!(objects
[i
] = get_handle_obj( current
->process
, handles
[i
], SYNCHRONIZE
, NULL
)))
504 if (i
< count
) goto done
;
505 if (!wait_on( count
, objects
, flags
, sec
, usec
)) goto done
;
507 if ((ret
= check_wait( current
)) != -1)
509 /* condition is already satisfied */
515 /* now we need to wait */
516 if (flags
& SELECT_TIMEOUT
)
518 if (!(current
->wait
->user
= add_timeout_user( ¤t
->wait
->timeout
,
519 thread_timeout
, current
->wait
)))
525 current
->wait
->cookie
= cookie
;
526 set_error( STATUS_PENDING
);
529 while (--i
>= 0) release_object( objects
[i
] );
532 /* attempt to wake threads sleeping on the object wait queue */
533 void wake_up( struct object
*obj
, int max
)
535 struct wait_queue_entry
*entry
= obj
->head
;
539 struct thread
*thread
= entry
->thread
;
541 if (wake_thread( thread
))
543 if (max
&& !--max
) break;
548 /* queue an async procedure call */
549 int thread_queue_apc( struct thread
*thread
, struct object
*owner
, void *func
,
550 enum apc_type type
, int system
, int nb_args
, ... )
552 struct thread_apc
*apc
;
553 struct apc_queue
*queue
= system
? &thread
->system_apc
: &thread
->user_apc
;
555 /* cancel a possible previous APC with the same owner */
556 if (owner
) thread_cancel_apc( thread
, owner
, system
);
557 if (thread
->state
== TERMINATED
) return 0;
559 if (!(apc
= mem_alloc( sizeof(*apc
) + (nb_args
-1)*sizeof(apc
->args
[0]) ))) return 0;
560 apc
->prev
= queue
->tail
;
565 apc
->nb_args
= nb_args
;
570 va_start( args
, nb_args
);
571 for (i
= 0; i
< nb_args
; i
++) apc
->args
[i
] = va_arg( args
, void * );
575 if (!apc
->prev
) /* first one */
578 wake_thread( thread
);
580 else apc
->prev
->next
= apc
;
585 /* cancel the async procedure call owned by a specific object */
586 void thread_cancel_apc( struct thread
*thread
, struct object
*owner
, int system
)
588 struct thread_apc
*apc
;
589 struct apc_queue
*queue
= system
? &thread
->system_apc
: &thread
->user_apc
;
590 for (apc
= queue
->head
; apc
; apc
= apc
->next
)
592 if (apc
->owner
!= owner
) continue;
593 if (apc
->next
) apc
->next
->prev
= apc
->prev
;
594 else queue
->tail
= apc
->prev
;
595 if (apc
->prev
) apc
->prev
->next
= apc
->next
;
596 else queue
->head
= apc
->next
;
602 /* remove the head apc from the queue; the returned pointer must be freed by the caller */
603 static struct thread_apc
*thread_dequeue_apc( struct thread
*thread
, int system_only
)
605 struct thread_apc
*apc
;
606 struct apc_queue
*queue
= &thread
->system_apc
;
608 if (!queue
->head
&& !system_only
) queue
= &thread
->user_apc
;
609 if ((apc
= queue
->head
))
611 if (apc
->next
) apc
->next
->prev
= NULL
;
612 else queue
->tail
= NULL
;
613 queue
->head
= apc
->next
;
618 /* add an fd to the inflight list */
619 /* return list index, or -1 on error */
620 int thread_add_inflight_fd( struct thread
*thread
, int client
, int server
)
624 if (server
== -1) return -1;
631 /* first check if we already have an entry for this fd */
632 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
633 if (thread
->inflight
[i
].client
== client
)
635 close( thread
->inflight
[i
].server
);
636 thread
->inflight
[i
].server
= server
;
640 /* now find a free spot to store it */
641 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
642 if (thread
->inflight
[i
].client
== -1)
644 thread
->inflight
[i
].client
= client
;
645 thread
->inflight
[i
].server
= server
;
651 /* get an inflight fd and purge it from the list */
652 /* the fd must be closed when no longer used */
653 int thread_get_inflight_fd( struct thread
*thread
, int client
)
657 if (client
== -1) return -1;
661 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
663 if (thread
->inflight
[i
].client
== client
)
665 ret
= thread
->inflight
[i
].server
;
666 thread
->inflight
[i
].server
= thread
->inflight
[i
].client
= -1;
670 } while (!receive_fd( thread
->process
)); /* in case it is still in the socket buffer */
674 /* retrieve an LDT selector entry */
675 static void get_selector_entry( struct thread
*thread
, int entry
,
676 unsigned int *base
, unsigned int *limit
,
677 unsigned char *flags
)
679 if (!thread
->process
->ldt_copy
)
681 set_error( STATUS_ACCESS_DENIED
);
686 set_error( STATUS_INVALID_PARAMETER
); /* FIXME */
689 if (suspend_for_ptrace( thread
))
691 unsigned char flags_buf
[4];
692 int *addr
= (int *)thread
->process
->ldt_copy
+ entry
;
693 if (read_thread_int( thread
, addr
, base
) == -1) goto done
;
694 if (read_thread_int( thread
, addr
+ 8192, limit
) == -1) goto done
;
695 addr
= (int *)thread
->process
->ldt_copy
+ 2*8192 + (entry
>> 2);
696 if (read_thread_int( thread
, addr
, (int *)flags_buf
) == -1) goto done
;
697 *flags
= flags_buf
[entry
& 3];
699 resume_thread( thread
);
703 /* kill a thread on the spot */
704 void kill_thread( struct thread
*thread
, int violent_death
)
706 if (thread
->state
== TERMINATED
) return; /* already killed */
707 thread
->state
= TERMINATED
;
708 if (current
== thread
) current
= NULL
;
710 fprintf( stderr
,"%08x: *killed* exit_code=%d\n",
711 (unsigned int)thread
, thread
->exit_code
);
714 while (thread
->wait
) end_wait( thread
);
715 send_thread_wakeup( thread
, NULL
, STATUS_PENDING
);
716 /* if it is waiting on the socket, we don't need to send a SIGTERM */
719 kill_console_processes( thread
, 0 );
720 debug_exit_thread( thread
);
721 abandon_mutexes( thread
);
722 remove_process_thread( thread
->process
, thread
);
723 wake_up( &thread
->obj
, 0 );
724 detach_thread( thread
, violent_death
? SIGTERM
: 0 );
725 if (thread
->request_fd
== thread
->obj
.fd
) thread
->request_fd
= -1;
726 if (thread
->reply_fd
== thread
->obj
.fd
) thread
->reply_fd
= -1;
727 remove_select_user( &thread
->obj
);
728 cleanup_thread( thread
);
729 release_object( thread
);
732 /* take a snapshot of currently running threads */
733 struct thread_snapshot
*thread_snap( int *count
)
735 struct thread_snapshot
*snapshot
, *ptr
;
736 struct thread
*thread
;
739 for (thread
= first_thread
; thread
; thread
= thread
->next
)
740 if (thread
->state
!= TERMINATED
) total
++;
741 if (!total
|| !(snapshot
= mem_alloc( sizeof(*snapshot
) * total
))) return NULL
;
743 for (thread
= first_thread
; thread
; thread
= thread
->next
)
745 if (thread
->state
== TERMINATED
) continue;
746 ptr
->thread
= thread
;
747 ptr
->count
= thread
->obj
.refcount
;
748 ptr
->priority
= thread
->priority
;
749 grab_object( thread
);
756 /* signal that we are finished booting on the client side */
757 DECL_HANDLER(boot_done
)
759 debug_level
= max( debug_level
, req
->debug_level
);
760 if (current
== booting_thread
)
762 booting_thread
= (struct thread
*)~0UL; /* make sure it doesn't match other threads */
763 lock_master_socket(0); /* allow other clients now */
767 /* create a new thread */
768 DECL_HANDLER(new_thread
)
770 struct thread
*thread
;
771 int request_fd
= thread_get_inflight_fd( current
, req
->request_fd
);
773 if (request_fd
== -1 || fcntl( request_fd
, F_SETFL
, O_NONBLOCK
) == -1)
775 if (request_fd
!= -1) close( request_fd
);
776 set_error( STATUS_INVALID_HANDLE
);
780 if ((thread
= create_thread( request_fd
, current
->process
)))
782 if (req
->suspend
) thread
->suspend
++;
784 if ((reply
->handle
= alloc_handle( current
->process
, thread
,
785 THREAD_ALL_ACCESS
, req
->inherit
)))
787 /* thread object will be released when the thread gets killed */
790 kill_thread( thread
, 1 );
795 /* initialize a new thread */
796 DECL_HANDLER(init_thread
)
798 int reply_fd
= thread_get_inflight_fd( current
, req
->reply_fd
);
799 int wait_fd
= thread_get_inflight_fd( current
, req
->wait_fd
);
801 if (current
->unix_pid
)
803 fatal_protocol_error( current
, "init_thread: already running\n" );
806 if (reply_fd
== -1 || fcntl( reply_fd
, F_SETFL
, O_NONBLOCK
) == -1)
808 fatal_protocol_error( current
, "bad reply fd\n" );
813 fatal_protocol_error( current
, "bad wait fd\n" );
817 current
->unix_pid
= req
->unix_pid
;
818 current
->teb
= req
->teb
;
819 current
->reply_fd
= reply_fd
;
820 current
->wait_fd
= wait_fd
;
822 if (current
->suspend
+ current
->process
->suspend
> 0) stop_thread( current
);
823 if (current
->process
->running_threads
> 1)
824 generate_debug_event( current
, CREATE_THREAD_DEBUG_EVENT
, req
->entry
);
826 reply
->pid
= get_process_id( current
->process
);
827 reply
->tid
= get_thread_id( current
);
828 reply
->boot
= (current
== booting_thread
);
829 reply
->version
= SERVER_PROTOCOL_VERSION
;
833 if (reply_fd
!= -1) close( reply_fd
);
834 if (wait_fd
!= -1) close( wait_fd
);
837 /* terminate a thread */
838 DECL_HANDLER(terminate_thread
)
840 struct thread
*thread
;
844 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_TERMINATE
)))
846 thread
->exit_code
= req
->exit_code
;
847 if (thread
!= current
) kill_thread( thread
, 1 );
851 reply
->last
= (thread
->process
->running_threads
== 1);
853 release_object( thread
);
857 /* open a handle to a thread */
858 DECL_HANDLER(open_thread
)
860 struct thread
*thread
= get_thread_from_id( req
->tid
);
865 reply
->handle
= alloc_handle( current
->process
, thread
, req
->access
, req
->inherit
);
866 release_object( thread
);
870 /* fetch information about a thread */
871 DECL_HANDLER(get_thread_info
)
873 struct thread
*thread
;
874 handle_t handle
= req
->handle
;
876 if (!handle
) thread
= get_thread_from_id( req
->tid_in
);
877 else thread
= get_thread_from_handle( req
->handle
, THREAD_QUERY_INFORMATION
);
881 reply
->tid
= get_thread_id( thread
);
882 reply
->teb
= thread
->teb
;
883 reply
->exit_code
= (thread
->state
== TERMINATED
) ? thread
->exit_code
: STILL_ACTIVE
;
884 reply
->priority
= thread
->priority
;
885 release_object( thread
);
889 /* set information about a thread */
890 DECL_HANDLER(set_thread_info
)
892 struct thread
*thread
;
894 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SET_INFORMATION
)))
896 set_thread_info( thread
, req
);
897 release_object( thread
);
901 /* suspend a thread */
902 DECL_HANDLER(suspend_thread
)
904 struct thread
*thread
;
906 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SUSPEND_RESUME
)))
908 if (thread
->state
== TERMINATED
) set_error( STATUS_ACCESS_DENIED
);
909 else reply
->count
= suspend_thread( thread
, 1 );
910 release_object( thread
);
914 /* resume a thread */
915 DECL_HANDLER(resume_thread
)
917 struct thread
*thread
;
919 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SUSPEND_RESUME
)))
921 if (thread
->state
== TERMINATED
) set_error( STATUS_ACCESS_DENIED
);
922 else reply
->count
= resume_thread( thread
);
923 release_object( thread
);
927 /* select on a handle list */
930 int count
= get_req_data_size() / sizeof(int);
931 select_on( count
, req
->cookie
, get_req_data(), req
->flags
, req
->sec
, req
->usec
);
934 /* queue an APC for a thread */
935 DECL_HANDLER(queue_apc
)
937 struct thread
*thread
;
938 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SET_CONTEXT
)))
940 thread_queue_apc( thread
, NULL
, req
->func
, APC_USER
, !req
->user
, 1, req
->param
);
941 release_object( thread
);
945 /* get next APC to call */
946 DECL_HANDLER(get_apc
)
948 struct thread_apc
*apc
;
953 if (!(apc
= thread_dequeue_apc( current
, !req
->alertable
)))
957 reply
->type
= APC_NONE
;
960 /* Optimization: ignore APCs that have a NULL func; they are only used
961 * to wake up a thread, but since we got here the thread woke up already.
962 * Exception: for APC_ASYNC_IO, func == NULL is legal.
964 if (apc
->func
|| apc
->type
== APC_ASYNC_IO
) break;
967 size
= apc
->nb_args
* sizeof(apc
->args
[0]);
968 if (size
> get_reply_max_size()) size
= get_reply_max_size();
969 reply
->func
= apc
->func
;
970 reply
->type
= apc
->type
;
971 set_reply_data( apc
->args
, size
);
975 /* fetch a selector entry for a thread */
976 DECL_HANDLER(get_selector_entry
)
978 struct thread
*thread
;
979 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_QUERY_INFORMATION
)))
981 get_selector_entry( thread
, req
->entry
, &reply
->base
, &reply
->limit
, &reply
->flags
);
982 release_object( thread
);