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>
49 struct thread_wait
*next
; /* next wait structure for this thread */
50 struct thread
*thread
; /* owner thread */
51 int count
; /* count of objects */
53 void *cookie
; /* magic cookie to return to client */
54 struct timeval timeout
;
55 struct timeout_user
*user
;
56 struct wait_queue_entry queues
[1];
59 /* asynchronous procedure calls */
63 struct thread_apc
*next
; /* queue linked list */
64 struct thread_apc
*prev
;
65 struct object
*owner
; /* object that queued this apc */
66 void *func
; /* function to call in client */
67 enum apc_type type
; /* type of apc function */
68 int nb_args
; /* number of arguments */
69 void *args
[1]; /* function arguments */
73 /* thread operations */
75 static void dump_thread( struct object
*obj
, int verbose
);
76 static int thread_signaled( struct object
*obj
, struct thread
*thread
);
77 static void thread_poll_event( struct object
*obj
, int event
);
78 static void destroy_thread( struct object
*obj
);
79 static struct thread_apc
*thread_dequeue_apc( struct thread
*thread
, int system_only
);
81 static const struct object_ops thread_ops
=
83 sizeof(struct thread
), /* size */
84 dump_thread
, /* dump */
85 add_queue
, /* add_queue */
86 remove_queue
, /* remove_queue */
87 thread_signaled
, /* signaled */
88 no_satisfied
, /* satisfied */
89 NULL
, /* get_poll_events */
90 thread_poll_event
, /* poll_event */
91 no_get_fd
, /* get_fd */
93 no_get_file_info
, /* get_file_info */
94 NULL
, /* queue_async */
95 destroy_thread
/* destroy */
98 static struct thread
*first_thread
;
99 static struct thread
*booting_thread
;
101 /* initialize the structure for a newly allocated thread */
102 inline static void init_thread_structure( struct thread
*thread
)
106 thread
->unix_pid
= 0; /* not known yet */
107 thread
->context
= NULL
;
109 thread
->mutex
= NULL
;
110 thread
->debug_ctx
= NULL
;
111 thread
->debug_event
= NULL
;
112 thread
->queue
= NULL
;
115 thread
->system_apc
.head
= NULL
;
116 thread
->system_apc
.tail
= NULL
;
117 thread
->user_apc
.head
= NULL
;
118 thread
->user_apc
.tail
= NULL
;
120 thread
->req_data
= NULL
;
121 thread
->req_toread
= 0;
122 thread
->reply_data
= NULL
;
123 thread
->reply_towrite
= 0;
124 thread
->reply_fd
= -1;
125 thread
->wait_fd
= -1;
126 thread
->state
= RUNNING
;
127 thread
->attached
= 0;
128 thread
->exit_code
= 0;
131 thread
->priority
= THREAD_PRIORITY_NORMAL
;
132 thread
->affinity
= 1;
135 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
136 thread
->inflight
[i
].server
= thread
->inflight
[i
].client
= -1;
139 /* create a new thread */
140 struct thread
*create_thread( int fd
, struct process
*process
)
142 struct thread
*thread
;
144 if (!(thread
= alloc_object( &thread_ops
, fd
))) return NULL
;
146 init_thread_structure( thread
);
148 thread
->process
= (struct process
*)grab_object( process
);
149 thread
->request_fd
= fd
;
150 if (!current
) current
= thread
;
152 if (!booting_thread
) /* first thread ever */
154 booting_thread
= thread
;
155 lock_master_socket(1);
158 if ((thread
->next
= first_thread
) != NULL
) thread
->next
->prev
= thread
;
159 first_thread
= thread
;
161 set_select_events( &thread
->obj
, POLLIN
); /* start listening to events */
162 add_process_thread( thread
->process
, thread
);
166 /* handle a client event */
167 static void thread_poll_event( struct object
*obj
, int event
)
169 struct thread
*thread
= (struct thread
*)obj
;
170 assert( obj
->ops
== &thread_ops
);
172 if (event
& (POLLERR
| POLLHUP
)) kill_thread( thread
, 0 );
173 else if (event
& POLLIN
) read_request( thread
);
174 else if (event
& POLLOUT
) write_reply( thread
);
177 /* cleanup everything that is no longer needed by a dead thread */
178 /* used by destroy_thread and kill_thread */
179 static void cleanup_thread( struct thread
*thread
)
182 struct thread_apc
*apc
;
184 while ((apc
= thread_dequeue_apc( thread
, 0 ))) free( apc
);
185 if (thread
->req_data
) free( thread
->req_data
);
186 if (thread
->reply_data
) free( thread
->reply_data
);
187 if (thread
->request_fd
!= -1) close( thread
->request_fd
);
188 if (thread
->reply_fd
!= -1) close( thread
->reply_fd
);
189 if (thread
->wait_fd
!= -1) close( thread
->wait_fd
);
190 free_msg_queue( thread
);
191 destroy_thread_windows( thread
);
192 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
194 if (thread
->inflight
[i
].client
!= -1)
196 close( thread
->inflight
[i
].server
);
197 thread
->inflight
[i
].client
= thread
->inflight
[i
].server
= -1;
200 thread
->req_data
= NULL
;
201 thread
->reply_data
= NULL
;
202 thread
->request_fd
= -1;
203 thread
->reply_fd
= -1;
204 thread
->wait_fd
= -1;
206 if (thread
== booting_thread
) /* killing booting thread */
208 booting_thread
= NULL
;
209 lock_master_socket(0);
213 /* destroy a thread when its refcount is 0 */
214 static void destroy_thread( struct object
*obj
)
216 struct thread_apc
*apc
;
217 struct thread
*thread
= (struct thread
*)obj
;
218 assert( obj
->ops
== &thread_ops
);
220 assert( !thread
->debug_ctx
); /* cannot still be debugging something */
221 if (thread
->next
) thread
->next
->prev
= thread
->prev
;
222 if (thread
->prev
) thread
->prev
->next
= thread
->next
;
223 else first_thread
= thread
->next
;
224 while ((apc
= thread_dequeue_apc( thread
, 0 ))) free( apc
);
225 if (thread
->info
) release_object( thread
->info
);
226 cleanup_thread( thread
);
227 release_object( thread
->process
);
230 /* dump a thread on stdout for debugging purposes */
231 static void dump_thread( struct object
*obj
, int verbose
)
233 struct thread
*thread
= (struct thread
*)obj
;
234 assert( obj
->ops
== &thread_ops
);
236 fprintf( stderr
, "Thread pid=%d teb=%p state=%d\n",
237 thread
->unix_pid
, thread
->teb
, thread
->state
);
240 static int thread_signaled( struct object
*obj
, struct thread
*thread
)
242 struct thread
*mythread
= (struct thread
*)obj
;
243 return (mythread
->state
== TERMINATED
);
246 /* get a thread pointer from a thread id (and increment the refcount) */
247 struct thread
*get_thread_from_id( void *id
)
249 struct thread
*t
= first_thread
;
250 while (t
&& (t
!= id
)) t
= t
->next
;
251 if (t
) grab_object( t
);
252 else set_error( STATUS_INVALID_PARAMETER
);
256 /* get a thread from a handle (and increment the refcount) */
257 struct thread
*get_thread_from_handle( obj_handle_t handle
, unsigned int access
)
259 return (struct thread
*)get_handle_obj( current
->process
, handle
,
260 access
, &thread_ops
);
263 /* find a thread from a Unix pid */
264 struct thread
*get_thread_from_pid( int pid
)
266 struct thread
*t
= first_thread
;
267 while (t
&& (t
->unix_pid
!= pid
)) t
= t
->next
;
271 /* set all information about a thread */
272 static void set_thread_info( struct thread
*thread
,
273 const struct set_thread_info_request
*req
)
275 if (req
->mask
& SET_THREAD_INFO_PRIORITY
)
276 thread
->priority
= req
->priority
;
277 if (req
->mask
& SET_THREAD_INFO_AFFINITY
)
279 if (req
->affinity
!= 1) set_error( STATUS_INVALID_PARAMETER
);
280 else thread
->affinity
= req
->affinity
;
284 /* suspend a thread */
285 int suspend_thread( struct thread
*thread
, int check_limit
)
287 int old_count
= thread
->suspend
;
288 if (thread
->suspend
< MAXIMUM_SUSPEND_COUNT
|| !check_limit
)
290 if (!(thread
->process
->suspend
+ thread
->suspend
++)) stop_thread( thread
);
292 else set_error( STATUS_SUSPEND_COUNT_EXCEEDED
);
296 /* resume a thread */
297 int resume_thread( struct thread
*thread
)
299 int old_count
= thread
->suspend
;
300 if (thread
->suspend
> 0)
302 if (!(--thread
->suspend
+ thread
->process
->suspend
)) continue_thread( thread
);
307 /* add a thread to an object wait queue; return 1 if OK, 0 on error */
308 int add_queue( struct object
*obj
, struct wait_queue_entry
*entry
)
312 entry
->prev
= obj
->tail
;
314 if (obj
->tail
) obj
->tail
->next
= entry
;
315 else obj
->head
= entry
;
320 /* remove a thread from an object wait queue */
321 void remove_queue( struct object
*obj
, struct wait_queue_entry
*entry
)
323 if (entry
->next
) entry
->next
->prev
= entry
->prev
;
324 else obj
->tail
= entry
->prev
;
325 if (entry
->prev
) entry
->prev
->next
= entry
->next
;
326 else obj
->head
= entry
->next
;
327 release_object( obj
);
331 static void end_wait( struct thread
*thread
)
333 struct thread_wait
*wait
= thread
->wait
;
334 struct wait_queue_entry
*entry
;
338 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
339 entry
->obj
->ops
->remove_queue( entry
->obj
, entry
);
340 if (wait
->user
) remove_timeout_user( wait
->user
);
341 thread
->wait
= wait
->next
;
345 /* build the thread wait structure */
346 static int wait_on( int count
, struct object
*objects
[], int flags
, int sec
, int usec
)
348 struct thread_wait
*wait
;
349 struct wait_queue_entry
*entry
;
352 if (!(wait
= mem_alloc( sizeof(*wait
) + (count
-1) * sizeof(*entry
) ))) return 0;
353 wait
->next
= current
->wait
;
354 wait
->thread
= current
;
358 current
->wait
= wait
;
359 if (flags
& SELECT_TIMEOUT
)
361 wait
->timeout
.tv_sec
= sec
;
362 wait
->timeout
.tv_usec
= usec
;
365 for (i
= 0, entry
= wait
->queues
; i
< count
; i
++, entry
++)
367 struct object
*obj
= objects
[i
];
368 entry
->thread
= current
;
369 if (!obj
->ops
->add_queue( obj
, entry
))
379 /* check if the thread waiting condition is satisfied */
380 static int check_wait( struct thread
*thread
)
383 struct thread_wait
*wait
= thread
->wait
;
384 struct wait_queue_entry
*entry
= wait
->queues
;
387 if (wait
->flags
& SELECT_ALL
)
390 /* Note: we must check them all anyway, as some objects may
391 * want to do something when signaled, even if others are not */
392 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
393 not_ok
|= !entry
->obj
->ops
->signaled( entry
->obj
, thread
);
394 if (not_ok
) goto other_checks
;
395 /* Wait satisfied: tell it to all objects */
397 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
398 if (entry
->obj
->ops
->satisfied( entry
->obj
, thread
))
399 signaled
= STATUS_ABANDONED_WAIT_0
;
404 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
406 if (!entry
->obj
->ops
->signaled( entry
->obj
, thread
)) continue;
407 /* Wait satisfied: tell it to the object */
409 if (entry
->obj
->ops
->satisfied( entry
->obj
, thread
))
410 signaled
= i
+ STATUS_ABANDONED_WAIT_0
;
416 if ((wait
->flags
& SELECT_INTERRUPTIBLE
) && thread
->system_apc
.head
) return STATUS_USER_APC
;
417 if ((wait
->flags
& SELECT_ALERTABLE
) && thread
->user_apc
.head
) return STATUS_USER_APC
;
418 if (wait
->flags
& SELECT_TIMEOUT
)
421 gettimeofday( &now
, NULL
);
422 if (!time_before( &now
, &wait
->timeout
)) return STATUS_TIMEOUT
;
427 /* send the wakeup signal to a thread */
428 static int send_thread_wakeup( struct thread
*thread
, void *cookie
, int signaled
)
430 struct wake_up_reply reply
;
433 reply
.cookie
= cookie
;
434 reply
.signaled
= signaled
;
435 if ((ret
= write( thread
->wait_fd
, &reply
, sizeof(reply
) )) == sizeof(reply
)) return 0;
437 fatal_protocol_error( thread
, "partial wakeup write %d\n", ret
);
438 else if (errno
== EPIPE
)
439 kill_thread( thread
, 0 ); /* normal death */
441 fatal_protocol_perror( thread
, "write" );
445 /* attempt to wake up a thread */
446 /* return >0 if OK, 0 if the wait condition is still not satisfied */
447 static int wake_thread( struct thread
*thread
)
452 for (count
= 0; thread
->wait
; count
++)
454 if ((signaled
= check_wait( thread
)) == -1) break;
456 cookie
= thread
->wait
->cookie
;
457 if (debug_level
) fprintf( stderr
, "%08x: *wakeup* signaled=%d cookie=%p\n",
458 (unsigned int)thread
, signaled
, cookie
);
460 if (send_thread_wakeup( thread
, cookie
, signaled
) == -1) /* error */
466 /* thread wait timeout */
467 static void thread_timeout( void *ptr
)
469 struct thread_wait
*wait
= ptr
;
470 struct thread
*thread
= wait
->thread
;
471 void *cookie
= wait
->cookie
;
474 if (thread
->wait
!= wait
) return; /* not the top-level wait, ignore it */
476 if (debug_level
) fprintf( stderr
, "%08x: *wakeup* signaled=%d cookie=%p\n",
477 (unsigned int)thread
, STATUS_TIMEOUT
, cookie
);
479 if (send_thread_wakeup( thread
, cookie
, STATUS_TIMEOUT
) == -1) return;
480 /* check if other objects have become signaled in the meantime */
481 wake_thread( thread
);
484 /* select on a list of handles */
485 static void select_on( int count
, void *cookie
, const obj_handle_t
*handles
,
486 int flags
, int sec
, int usec
)
489 struct object
*objects
[MAXIMUM_WAIT_OBJECTS
];
491 if ((count
< 0) || (count
> MAXIMUM_WAIT_OBJECTS
))
493 set_error( STATUS_INVALID_PARAMETER
);
496 for (i
= 0; i
< count
; i
++)
498 if (!(objects
[i
] = get_handle_obj( current
->process
, handles
[i
], SYNCHRONIZE
, NULL
)))
502 if (i
< count
) goto done
;
503 if (!wait_on( count
, objects
, flags
, sec
, usec
)) goto done
;
505 if ((ret
= check_wait( current
)) != -1)
507 /* condition is already satisfied */
513 /* now we need to wait */
514 if (flags
& SELECT_TIMEOUT
)
516 if (!(current
->wait
->user
= add_timeout_user( ¤t
->wait
->timeout
,
517 thread_timeout
, current
->wait
)))
523 current
->wait
->cookie
= cookie
;
524 set_error( STATUS_PENDING
);
527 while (--i
>= 0) release_object( objects
[i
] );
530 /* attempt to wake threads sleeping on the object wait queue */
531 void wake_up( struct object
*obj
, int max
)
533 struct wait_queue_entry
*entry
= obj
->head
;
537 struct thread
*thread
= entry
->thread
;
539 if (wake_thread( thread
))
541 if (max
&& !--max
) break;
546 /* queue an async procedure call */
547 int thread_queue_apc( struct thread
*thread
, struct object
*owner
, void *func
,
548 enum apc_type type
, int system
, int nb_args
, ... )
550 struct thread_apc
*apc
;
551 struct apc_queue
*queue
= system
? &thread
->system_apc
: &thread
->user_apc
;
553 /* cancel a possible previous APC with the same owner */
554 if (owner
) thread_cancel_apc( thread
, owner
, system
);
555 if (thread
->state
== TERMINATED
) return 0;
557 if (!(apc
= mem_alloc( sizeof(*apc
) + (nb_args
-1)*sizeof(apc
->args
[0]) ))) return 0;
558 apc
->prev
= queue
->tail
;
563 apc
->nb_args
= nb_args
;
568 va_start( args
, nb_args
);
569 for (i
= 0; i
< nb_args
; i
++) apc
->args
[i
] = va_arg( args
, void * );
573 if (!apc
->prev
) /* first one */
576 wake_thread( thread
);
578 else apc
->prev
->next
= apc
;
583 /* cancel the async procedure call owned by a specific object */
584 void thread_cancel_apc( struct thread
*thread
, struct object
*owner
, int system
)
586 struct thread_apc
*apc
;
587 struct apc_queue
*queue
= system
? &thread
->system_apc
: &thread
->user_apc
;
588 for (apc
= queue
->head
; apc
; apc
= apc
->next
)
590 if (apc
->owner
!= owner
) continue;
591 if (apc
->next
) apc
->next
->prev
= apc
->prev
;
592 else queue
->tail
= apc
->prev
;
593 if (apc
->prev
) apc
->prev
->next
= apc
->next
;
594 else queue
->head
= apc
->next
;
600 /* remove the head apc from the queue; the returned pointer must be freed by the caller */
601 static struct thread_apc
*thread_dequeue_apc( struct thread
*thread
, int system_only
)
603 struct thread_apc
*apc
;
604 struct apc_queue
*queue
= &thread
->system_apc
;
606 if (!queue
->head
&& !system_only
) queue
= &thread
->user_apc
;
607 if ((apc
= queue
->head
))
609 if (apc
->next
) apc
->next
->prev
= NULL
;
610 else queue
->tail
= NULL
;
611 queue
->head
= apc
->next
;
616 /* add an fd to the inflight list */
617 /* return list index, or -1 on error */
618 int thread_add_inflight_fd( struct thread
*thread
, int client
, int server
)
622 if (server
== -1) return -1;
629 /* first check if we already have an entry for this fd */
630 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
631 if (thread
->inflight
[i
].client
== client
)
633 close( thread
->inflight
[i
].server
);
634 thread
->inflight
[i
].server
= server
;
638 /* now find a free spot to store it */
639 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
640 if (thread
->inflight
[i
].client
== -1)
642 thread
->inflight
[i
].client
= client
;
643 thread
->inflight
[i
].server
= server
;
649 /* get an inflight fd and purge it from the list */
650 /* the fd must be closed when no longer used */
651 int thread_get_inflight_fd( struct thread
*thread
, int client
)
655 if (client
== -1) return -1;
659 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
661 if (thread
->inflight
[i
].client
== client
)
663 ret
= thread
->inflight
[i
].server
;
664 thread
->inflight
[i
].server
= thread
->inflight
[i
].client
= -1;
668 } while (!receive_fd( thread
->process
)); /* in case it is still in the socket buffer */
672 /* retrieve an LDT selector entry */
673 static void get_selector_entry( struct thread
*thread
, int entry
,
674 unsigned int *base
, unsigned int *limit
,
675 unsigned char *flags
)
677 if (!thread
->process
->ldt_copy
)
679 set_error( STATUS_ACCESS_DENIED
);
684 set_error( STATUS_INVALID_PARAMETER
); /* FIXME */
687 if (suspend_for_ptrace( thread
))
689 unsigned char flags_buf
[4];
690 int *addr
= (int *)thread
->process
->ldt_copy
+ entry
;
691 if (read_thread_int( thread
, addr
, base
) == -1) goto done
;
692 if (read_thread_int( thread
, addr
+ 8192, limit
) == -1) goto done
;
693 addr
= (int *)thread
->process
->ldt_copy
+ 2*8192 + (entry
>> 2);
694 if (read_thread_int( thread
, addr
, (int *)flags_buf
) == -1) goto done
;
695 *flags
= flags_buf
[entry
& 3];
697 resume_thread( thread
);
701 /* kill a thread on the spot */
702 void kill_thread( struct thread
*thread
, int violent_death
)
704 if (thread
->state
== TERMINATED
) return; /* already killed */
705 thread
->state
= TERMINATED
;
706 if (current
== thread
) current
= NULL
;
708 fprintf( stderr
,"%08x: *killed* exit_code=%d\n",
709 (unsigned int)thread
, thread
->exit_code
);
712 while (thread
->wait
) end_wait( thread
);
713 send_thread_wakeup( thread
, NULL
, STATUS_PENDING
);
714 /* if it is waiting on the socket, we don't need to send a SIGTERM */
717 kill_console_processes( thread
, 0 );
718 debug_exit_thread( thread
);
719 abandon_mutexes( thread
);
720 remove_process_thread( thread
->process
, thread
);
721 wake_up( &thread
->obj
, 0 );
722 detach_thread( thread
, violent_death
? SIGTERM
: 0 );
723 if (thread
->request_fd
== thread
->obj
.fd
) thread
->request_fd
= -1;
724 if (thread
->reply_fd
== thread
->obj
.fd
) thread
->reply_fd
= -1;
725 remove_select_user( &thread
->obj
);
726 cleanup_thread( thread
);
727 release_object( thread
);
730 /* take a snapshot of currently running threads */
731 struct thread_snapshot
*thread_snap( int *count
)
733 struct thread_snapshot
*snapshot
, *ptr
;
734 struct thread
*thread
;
737 for (thread
= first_thread
; thread
; thread
= thread
->next
)
738 if (thread
->state
!= TERMINATED
) total
++;
739 if (!total
|| !(snapshot
= mem_alloc( sizeof(*snapshot
) * total
))) return NULL
;
741 for (thread
= first_thread
; thread
; thread
= thread
->next
)
743 if (thread
->state
== TERMINATED
) continue;
744 ptr
->thread
= thread
;
745 ptr
->count
= thread
->obj
.refcount
;
746 ptr
->priority
= thread
->priority
;
747 grab_object( thread
);
754 /* signal that we are finished booting on the client side */
755 DECL_HANDLER(boot_done
)
757 debug_level
= max( debug_level
, req
->debug_level
);
758 if (current
== booting_thread
)
760 booting_thread
= (struct thread
*)~0UL; /* make sure it doesn't match other threads */
761 lock_master_socket(0); /* allow other clients now */
765 /* create a new thread */
766 DECL_HANDLER(new_thread
)
768 struct thread
*thread
;
769 int request_fd
= thread_get_inflight_fd( current
, req
->request_fd
);
771 if (request_fd
== -1 || fcntl( request_fd
, F_SETFL
, O_NONBLOCK
) == -1)
773 if (request_fd
!= -1) close( request_fd
);
774 set_error( STATUS_INVALID_HANDLE
);
778 if ((thread
= create_thread( request_fd
, current
->process
)))
780 if (req
->suspend
) thread
->suspend
++;
782 if ((reply
->handle
= alloc_handle( current
->process
, thread
,
783 THREAD_ALL_ACCESS
, req
->inherit
)))
785 /* thread object will be released when the thread gets killed */
788 kill_thread( thread
, 1 );
792 /* initialize a new thread */
793 DECL_HANDLER(init_thread
)
795 int reply_fd
= thread_get_inflight_fd( current
, req
->reply_fd
);
796 int wait_fd
= thread_get_inflight_fd( current
, req
->wait_fd
);
798 if (current
->unix_pid
)
800 fatal_protocol_error( current
, "init_thread: already running\n" );
803 if (reply_fd
== -1 || fcntl( reply_fd
, F_SETFL
, O_NONBLOCK
) == -1)
805 fatal_protocol_error( current
, "bad reply fd\n" );
810 fatal_protocol_error( current
, "bad wait fd\n" );
814 current
->unix_pid
= req
->unix_pid
;
815 current
->teb
= req
->teb
;
816 current
->reply_fd
= reply_fd
;
817 current
->wait_fd
= wait_fd
;
819 if (current
->suspend
+ current
->process
->suspend
> 0) stop_thread( current
);
820 if (current
->process
->running_threads
> 1)
821 generate_debug_event( current
, CREATE_THREAD_DEBUG_EVENT
, req
->entry
);
823 reply
->pid
= get_process_id( current
->process
);
824 reply
->tid
= get_thread_id( current
);
825 reply
->boot
= (current
== booting_thread
);
826 reply
->version
= SERVER_PROTOCOL_VERSION
;
830 if (reply_fd
!= -1) close( reply_fd
);
831 if (wait_fd
!= -1) close( wait_fd
);
834 /* terminate a thread */
835 DECL_HANDLER(terminate_thread
)
837 struct thread
*thread
;
841 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_TERMINATE
)))
843 thread
->exit_code
= req
->exit_code
;
844 if (thread
!= current
) kill_thread( thread
, 1 );
848 reply
->last
= (thread
->process
->running_threads
== 1);
850 release_object( thread
);
854 /* open a handle to a thread */
855 DECL_HANDLER(open_thread
)
857 struct thread
*thread
= get_thread_from_id( req
->tid
);
862 reply
->handle
= alloc_handle( current
->process
, thread
, req
->access
, req
->inherit
);
863 release_object( thread
);
867 /* fetch information about a thread */
868 DECL_HANDLER(get_thread_info
)
870 struct thread
*thread
;
871 obj_handle_t handle
= req
->handle
;
873 if (!handle
) thread
= get_thread_from_id( req
->tid_in
);
874 else thread
= get_thread_from_handle( req
->handle
, THREAD_QUERY_INFORMATION
);
878 reply
->tid
= get_thread_id( thread
);
879 reply
->teb
= thread
->teb
;
880 reply
->exit_code
= (thread
->state
== TERMINATED
) ? thread
->exit_code
: STILL_ACTIVE
;
881 reply
->priority
= thread
->priority
;
882 release_object( thread
);
886 /* set information about a thread */
887 DECL_HANDLER(set_thread_info
)
889 struct thread
*thread
;
891 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SET_INFORMATION
)))
893 set_thread_info( thread
, req
);
894 release_object( thread
);
898 /* suspend a thread */
899 DECL_HANDLER(suspend_thread
)
901 struct thread
*thread
;
903 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SUSPEND_RESUME
)))
905 if (thread
->state
== TERMINATED
) set_error( STATUS_ACCESS_DENIED
);
906 else reply
->count
= suspend_thread( thread
, 1 );
907 release_object( thread
);
911 /* resume a thread */
912 DECL_HANDLER(resume_thread
)
914 struct thread
*thread
;
916 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SUSPEND_RESUME
)))
918 if (thread
->state
== TERMINATED
) set_error( STATUS_ACCESS_DENIED
);
919 else reply
->count
= resume_thread( thread
);
920 release_object( thread
);
924 /* select on a handle list */
927 int count
= get_req_data_size() / sizeof(int);
928 select_on( count
, req
->cookie
, get_req_data(), req
->flags
, req
->sec
, req
->usec
);
931 /* queue an APC for a thread */
932 DECL_HANDLER(queue_apc
)
934 struct thread
*thread
;
935 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SET_CONTEXT
)))
937 thread_queue_apc( thread
, NULL
, req
->func
, APC_USER
, !req
->user
, 1, req
->param
);
938 release_object( thread
);
942 /* get next APC to call */
943 DECL_HANDLER(get_apc
)
945 struct thread_apc
*apc
;
950 if (!(apc
= thread_dequeue_apc( current
, !req
->alertable
)))
954 reply
->type
= APC_NONE
;
957 /* Optimization: ignore APCs that have a NULL func; they are only used
958 * to wake up a thread, but since we got here the thread woke up already.
959 * Exception: for APC_ASYNC_IO, func == NULL is legal.
961 if (apc
->func
|| apc
->type
== APC_ASYNC_IO
) break;
964 size
= apc
->nb_args
* sizeof(apc
->args
[0]);
965 if (size
> get_reply_max_size()) size
= get_reply_max_size();
966 reply
->func
= apc
->func
;
967 reply
->type
= apc
->type
;
968 set_reply_data( apc
->args
, size
);
972 /* fetch a selector entry for a thread */
973 DECL_HANDLER(get_selector_entry
)
975 struct thread
*thread
;
976 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_QUERY_INFORMATION
)))
978 get_selector_entry( thread
, req
->entry
, &reply
->base
, &reply
->limit
, &reply
->flags
);
979 release_object( thread
);