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
;
113 thread
->hooks
= NULL
;
116 thread
->system_apc
.head
= NULL
;
117 thread
->system_apc
.tail
= NULL
;
118 thread
->user_apc
.head
= NULL
;
119 thread
->user_apc
.tail
= NULL
;
121 thread
->req_data
= NULL
;
122 thread
->req_toread
= 0;
123 thread
->reply_data
= NULL
;
124 thread
->reply_towrite
= 0;
125 thread
->reply_fd
= -1;
126 thread
->wait_fd
= -1;
127 thread
->state
= RUNNING
;
128 thread
->attached
= 0;
129 thread
->exit_code
= 0;
132 thread
->priority
= THREAD_PRIORITY_NORMAL
;
133 thread
->affinity
= 1;
135 thread
->creation_time
= time(NULL
);
136 thread
->exit_time
= 0;
138 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
139 thread
->inflight
[i
].server
= thread
->inflight
[i
].client
= -1;
142 /* create a new thread */
143 struct thread
*create_thread( int fd
, struct process
*process
)
145 struct thread
*thread
;
147 if (!(thread
= alloc_object( &thread_ops
, fd
))) return NULL
;
149 init_thread_structure( thread
);
151 thread
->process
= (struct process
*)grab_object( process
);
152 thread
->request_fd
= fd
;
153 if (!current
) current
= thread
;
155 if (!booting_thread
) /* first thread ever */
157 booting_thread
= thread
;
158 lock_master_socket(1);
161 if ((thread
->next
= first_thread
) != NULL
) thread
->next
->prev
= thread
;
162 first_thread
= thread
;
164 set_select_events( &thread
->obj
, POLLIN
); /* start listening to events */
165 add_process_thread( thread
->process
, thread
);
169 /* handle a client event */
170 static void thread_poll_event( struct object
*obj
, int event
)
172 struct thread
*thread
= (struct thread
*)obj
;
173 assert( obj
->ops
== &thread_ops
);
175 if (event
& (POLLERR
| POLLHUP
)) kill_thread( thread
, 0 );
176 else if (event
& POLLIN
) read_request( thread
);
177 else if (event
& POLLOUT
) write_reply( thread
);
180 /* cleanup everything that is no longer needed by a dead thread */
181 /* used by destroy_thread and kill_thread */
182 static void cleanup_thread( struct thread
*thread
)
185 struct thread_apc
*apc
;
187 while ((apc
= thread_dequeue_apc( thread
, 0 ))) free( apc
);
188 if (thread
->req_data
) free( thread
->req_data
);
189 if (thread
->reply_data
) free( thread
->reply_data
);
190 if (thread
->request_fd
!= -1) close( thread
->request_fd
);
191 if (thread
->reply_fd
!= -1) close( thread
->reply_fd
);
192 if (thread
->wait_fd
!= -1) close( thread
->wait_fd
);
193 if (thread
->hooks
) release_object( thread
->hooks
);
194 free_msg_queue( thread
);
195 destroy_thread_windows( thread
);
196 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
198 if (thread
->inflight
[i
].client
!= -1)
200 close( thread
->inflight
[i
].server
);
201 thread
->inflight
[i
].client
= thread
->inflight
[i
].server
= -1;
204 thread
->req_data
= NULL
;
205 thread
->reply_data
= NULL
;
206 thread
->request_fd
= -1;
207 thread
->reply_fd
= -1;
208 thread
->wait_fd
= -1;
209 thread
->hooks
= NULL
;
211 if (thread
== booting_thread
) /* killing booting thread */
213 booting_thread
= NULL
;
214 lock_master_socket(0);
218 /* destroy a thread when its refcount is 0 */
219 static void destroy_thread( struct object
*obj
)
221 struct thread_apc
*apc
;
222 struct thread
*thread
= (struct thread
*)obj
;
223 assert( obj
->ops
== &thread_ops
);
225 assert( !thread
->debug_ctx
); /* cannot still be debugging something */
226 if (thread
->next
) thread
->next
->prev
= thread
->prev
;
227 if (thread
->prev
) thread
->prev
->next
= thread
->next
;
228 else first_thread
= thread
->next
;
229 while ((apc
= thread_dequeue_apc( thread
, 0 ))) free( apc
);
230 if (thread
->info
) release_object( thread
->info
);
231 cleanup_thread( thread
);
232 release_object( thread
->process
);
235 /* dump a thread on stdout for debugging purposes */
236 static void dump_thread( struct object
*obj
, int verbose
)
238 struct thread
*thread
= (struct thread
*)obj
;
239 assert( obj
->ops
== &thread_ops
);
241 fprintf( stderr
, "Thread pid=%d teb=%p state=%d\n",
242 thread
->unix_pid
, thread
->teb
, thread
->state
);
245 static int thread_signaled( struct object
*obj
, struct thread
*thread
)
247 struct thread
*mythread
= (struct thread
*)obj
;
248 return (mythread
->state
== TERMINATED
);
251 /* get a thread pointer from a thread id (and increment the refcount) */
252 struct thread
*get_thread_from_id( thread_id_t id
)
254 struct thread
*t
= first_thread
;
255 while (t
&& (get_thread_id(t
) != id
)) t
= t
->next
;
256 if (t
) grab_object( t
);
257 else set_error( STATUS_INVALID_PARAMETER
);
261 /* get a thread from a handle (and increment the refcount) */
262 struct thread
*get_thread_from_handle( obj_handle_t handle
, unsigned int access
)
264 return (struct thread
*)get_handle_obj( current
->process
, handle
,
265 access
, &thread_ops
);
268 /* find a thread from a Unix pid */
269 struct thread
*get_thread_from_pid( int pid
)
271 struct thread
*t
= first_thread
;
272 while (t
&& (t
->unix_pid
!= pid
)) t
= t
->next
;
276 /* set all information about a thread */
277 static void set_thread_info( struct thread
*thread
,
278 const struct set_thread_info_request
*req
)
280 if (req
->mask
& SET_THREAD_INFO_PRIORITY
)
281 thread
->priority
= req
->priority
;
282 if (req
->mask
& SET_THREAD_INFO_AFFINITY
)
284 if (req
->affinity
!= 1) set_error( STATUS_INVALID_PARAMETER
);
285 else thread
->affinity
= req
->affinity
;
289 /* suspend a thread */
290 int suspend_thread( struct thread
*thread
, int check_limit
)
292 int old_count
= thread
->suspend
;
293 if (thread
->suspend
< MAXIMUM_SUSPEND_COUNT
|| !check_limit
)
295 if (!(thread
->process
->suspend
+ thread
->suspend
++)) stop_thread( thread
);
297 else set_error( STATUS_SUSPEND_COUNT_EXCEEDED
);
301 /* resume a thread */
302 int resume_thread( struct thread
*thread
)
304 int old_count
= thread
->suspend
;
305 if (thread
->suspend
> 0)
307 if (!(--thread
->suspend
+ thread
->process
->suspend
)) continue_thread( thread
);
312 /* add a thread to an object wait queue; return 1 if OK, 0 on error */
313 int add_queue( struct object
*obj
, struct wait_queue_entry
*entry
)
317 entry
->prev
= obj
->tail
;
319 if (obj
->tail
) obj
->tail
->next
= entry
;
320 else obj
->head
= entry
;
325 /* remove a thread from an object wait queue */
326 void remove_queue( struct object
*obj
, struct wait_queue_entry
*entry
)
328 if (entry
->next
) entry
->next
->prev
= entry
->prev
;
329 else obj
->tail
= entry
->prev
;
330 if (entry
->prev
) entry
->prev
->next
= entry
->next
;
331 else obj
->head
= entry
->next
;
332 release_object( obj
);
336 static void end_wait( struct thread
*thread
)
338 struct thread_wait
*wait
= thread
->wait
;
339 struct wait_queue_entry
*entry
;
343 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
344 entry
->obj
->ops
->remove_queue( entry
->obj
, entry
);
345 if (wait
->user
) remove_timeout_user( wait
->user
);
346 thread
->wait
= wait
->next
;
350 /* build the thread wait structure */
351 static int wait_on( int count
, struct object
*objects
[], int flags
, int sec
, int usec
)
353 struct thread_wait
*wait
;
354 struct wait_queue_entry
*entry
;
357 if (!(wait
= mem_alloc( sizeof(*wait
) + (count
-1) * sizeof(*entry
) ))) return 0;
358 wait
->next
= current
->wait
;
359 wait
->thread
= current
;
363 current
->wait
= wait
;
364 if (flags
& SELECT_TIMEOUT
)
366 wait
->timeout
.tv_sec
= sec
;
367 wait
->timeout
.tv_usec
= usec
;
370 for (i
= 0, entry
= wait
->queues
; i
< count
; i
++, entry
++)
372 struct object
*obj
= objects
[i
];
373 entry
->thread
= current
;
374 if (!obj
->ops
->add_queue( obj
, entry
))
384 /* check if the thread waiting condition is satisfied */
385 static int check_wait( struct thread
*thread
)
388 struct thread_wait
*wait
= thread
->wait
;
389 struct wait_queue_entry
*entry
= wait
->queues
;
392 if (wait
->flags
& SELECT_ALL
)
395 /* Note: we must check them all anyway, as some objects may
396 * want to do something when signaled, even if others are not */
397 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
398 not_ok
|= !entry
->obj
->ops
->signaled( entry
->obj
, thread
);
399 if (not_ok
) goto other_checks
;
400 /* Wait satisfied: tell it to all objects */
402 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
403 if (entry
->obj
->ops
->satisfied( entry
->obj
, thread
))
404 signaled
= STATUS_ABANDONED_WAIT_0
;
409 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
411 if (!entry
->obj
->ops
->signaled( entry
->obj
, thread
)) continue;
412 /* Wait satisfied: tell it to the object */
414 if (entry
->obj
->ops
->satisfied( entry
->obj
, thread
))
415 signaled
= i
+ STATUS_ABANDONED_WAIT_0
;
421 if ((wait
->flags
& SELECT_INTERRUPTIBLE
) && thread
->system_apc
.head
) return STATUS_USER_APC
;
422 if ((wait
->flags
& SELECT_ALERTABLE
) && thread
->user_apc
.head
) return STATUS_USER_APC
;
423 if (wait
->flags
& SELECT_TIMEOUT
)
426 gettimeofday( &now
, NULL
);
427 if (!time_before( &now
, &wait
->timeout
)) return STATUS_TIMEOUT
;
432 /* send the wakeup signal to a thread */
433 static int send_thread_wakeup( struct thread
*thread
, void *cookie
, int signaled
)
435 struct wake_up_reply reply
;
438 reply
.cookie
= cookie
;
439 reply
.signaled
= signaled
;
440 if ((ret
= write( thread
->wait_fd
, &reply
, sizeof(reply
) )) == sizeof(reply
)) return 0;
442 fatal_protocol_error( thread
, "partial wakeup write %d\n", ret
);
443 else if (errno
== EPIPE
)
444 kill_thread( thread
, 0 ); /* normal death */
446 fatal_protocol_perror( thread
, "write" );
450 /* attempt to wake up a thread */
451 /* return >0 if OK, 0 if the wait condition is still not satisfied */
452 static int wake_thread( struct thread
*thread
)
457 for (count
= 0; thread
->wait
; count
++)
459 if ((signaled
= check_wait( thread
)) == -1) break;
461 cookie
= thread
->wait
->cookie
;
462 if (debug_level
) fprintf( stderr
, "%08x: *wakeup* signaled=%d cookie=%p\n",
463 (unsigned int)thread
, signaled
, cookie
);
465 if (send_thread_wakeup( thread
, cookie
, signaled
) == -1) /* error */
471 /* thread wait timeout */
472 static void thread_timeout( void *ptr
)
474 struct thread_wait
*wait
= ptr
;
475 struct thread
*thread
= wait
->thread
;
476 void *cookie
= wait
->cookie
;
479 if (thread
->wait
!= wait
) return; /* not the top-level wait, ignore it */
481 if (debug_level
) fprintf( stderr
, "%08x: *wakeup* signaled=%d cookie=%p\n",
482 (unsigned int)thread
, STATUS_TIMEOUT
, cookie
);
484 if (send_thread_wakeup( thread
, cookie
, STATUS_TIMEOUT
) == -1) return;
485 /* check if other objects have become signaled in the meantime */
486 wake_thread( thread
);
489 /* select on a list of handles */
490 static void select_on( int count
, void *cookie
, const obj_handle_t
*handles
,
491 int flags
, int sec
, int usec
)
494 struct object
*objects
[MAXIMUM_WAIT_OBJECTS
];
496 if ((count
< 0) || (count
> MAXIMUM_WAIT_OBJECTS
))
498 set_error( STATUS_INVALID_PARAMETER
);
501 for (i
= 0; i
< count
; i
++)
503 if (!(objects
[i
] = get_handle_obj( current
->process
, handles
[i
], SYNCHRONIZE
, NULL
)))
507 if (i
< count
) goto done
;
508 if (!wait_on( count
, objects
, flags
, sec
, usec
)) goto done
;
510 if ((ret
= check_wait( current
)) != -1)
512 /* condition is already satisfied */
518 /* now we need to wait */
519 if (flags
& SELECT_TIMEOUT
)
521 if (!(current
->wait
->user
= add_timeout_user( ¤t
->wait
->timeout
,
522 thread_timeout
, current
->wait
)))
528 current
->wait
->cookie
= cookie
;
529 set_error( STATUS_PENDING
);
532 while (--i
>= 0) release_object( objects
[i
] );
535 /* attempt to wake threads sleeping on the object wait queue */
536 void wake_up( struct object
*obj
, int max
)
538 struct wait_queue_entry
*entry
= obj
->head
;
542 struct thread
*thread
= entry
->thread
;
544 if (wake_thread( thread
))
546 if (max
&& !--max
) break;
551 /* queue an async procedure call */
552 int thread_queue_apc( struct thread
*thread
, struct object
*owner
, void *func
,
553 enum apc_type type
, int system
, int nb_args
, ... )
555 struct thread_apc
*apc
;
556 struct apc_queue
*queue
= system
? &thread
->system_apc
: &thread
->user_apc
;
558 /* cancel a possible previous APC with the same owner */
559 if (owner
) thread_cancel_apc( thread
, owner
, system
);
560 if (thread
->state
== TERMINATED
) return 0;
562 if (!(apc
= mem_alloc( sizeof(*apc
) + (nb_args
-1)*sizeof(apc
->args
[0]) ))) return 0;
563 apc
->prev
= queue
->tail
;
568 apc
->nb_args
= nb_args
;
573 va_start( args
, nb_args
);
574 for (i
= 0; i
< nb_args
; i
++) apc
->args
[i
] = va_arg( args
, void * );
578 if (!apc
->prev
) /* first one */
581 wake_thread( thread
);
583 else apc
->prev
->next
= apc
;
588 /* cancel the async procedure call owned by a specific object */
589 void thread_cancel_apc( struct thread
*thread
, struct object
*owner
, int system
)
591 struct thread_apc
*apc
;
592 struct apc_queue
*queue
= system
? &thread
->system_apc
: &thread
->user_apc
;
593 for (apc
= queue
->head
; apc
; apc
= apc
->next
)
595 if (apc
->owner
!= owner
) continue;
596 if (apc
->next
) apc
->next
->prev
= apc
->prev
;
597 else queue
->tail
= apc
->prev
;
598 if (apc
->prev
) apc
->prev
->next
= apc
->next
;
599 else queue
->head
= apc
->next
;
605 /* remove the head apc from the queue; the returned pointer must be freed by the caller */
606 static struct thread_apc
*thread_dequeue_apc( struct thread
*thread
, int system_only
)
608 struct thread_apc
*apc
;
609 struct apc_queue
*queue
= &thread
->system_apc
;
611 if (!queue
->head
&& !system_only
) queue
= &thread
->user_apc
;
612 if ((apc
= queue
->head
))
614 if (apc
->next
) apc
->next
->prev
= NULL
;
615 else queue
->tail
= NULL
;
616 queue
->head
= apc
->next
;
621 /* add an fd to the inflight list */
622 /* return list index, or -1 on error */
623 int thread_add_inflight_fd( struct thread
*thread
, int client
, int server
)
627 if (server
== -1) return -1;
634 /* first check if we already have an entry for this fd */
635 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
636 if (thread
->inflight
[i
].client
== client
)
638 close( thread
->inflight
[i
].server
);
639 thread
->inflight
[i
].server
= server
;
643 /* now find a free spot to store it */
644 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
645 if (thread
->inflight
[i
].client
== -1)
647 thread
->inflight
[i
].client
= client
;
648 thread
->inflight
[i
].server
= server
;
654 /* get an inflight fd and purge it from the list */
655 /* the fd must be closed when no longer used */
656 int thread_get_inflight_fd( struct thread
*thread
, int client
)
660 if (client
== -1) return -1;
664 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
666 if (thread
->inflight
[i
].client
== client
)
668 ret
= thread
->inflight
[i
].server
;
669 thread
->inflight
[i
].server
= thread
->inflight
[i
].client
= -1;
673 } while (!receive_fd( thread
->process
)); /* in case it is still in the socket buffer */
677 /* retrieve an LDT selector entry */
678 static void get_selector_entry( struct thread
*thread
, int entry
,
679 unsigned int *base
, unsigned int *limit
,
680 unsigned char *flags
)
682 if (!thread
->process
->ldt_copy
)
684 set_error( STATUS_ACCESS_DENIED
);
689 set_error( STATUS_INVALID_PARAMETER
); /* FIXME */
692 if (suspend_for_ptrace( thread
))
694 unsigned char flags_buf
[4];
695 int *addr
= (int *)thread
->process
->ldt_copy
+ entry
;
696 if (read_thread_int( thread
, addr
, base
) == -1) goto done
;
697 if (read_thread_int( thread
, addr
+ 8192, limit
) == -1) goto done
;
698 addr
= (int *)thread
->process
->ldt_copy
+ 2*8192 + (entry
>> 2);
699 if (read_thread_int( thread
, addr
, (int *)flags_buf
) == -1) goto done
;
700 *flags
= flags_buf
[entry
& 3];
702 resume_thread( thread
);
706 /* kill a thread on the spot */
707 void kill_thread( struct thread
*thread
, int violent_death
)
709 if (thread
->state
== TERMINATED
) return; /* already killed */
710 thread
->state
= TERMINATED
;
711 thread
->exit_time
= time(NULL
);
712 if (current
== thread
) current
= NULL
;
714 fprintf( stderr
,"%08x: *killed* exit_code=%d\n",
715 (unsigned int)thread
, thread
->exit_code
);
718 while (thread
->wait
) end_wait( thread
);
719 send_thread_wakeup( thread
, NULL
, STATUS_PENDING
);
720 /* if it is waiting on the socket, we don't need to send a SIGTERM */
723 kill_console_processes( thread
, 0 );
724 debug_exit_thread( thread
);
725 abandon_mutexes( thread
);
726 remove_process_thread( thread
->process
, thread
);
727 wake_up( &thread
->obj
, 0 );
728 detach_thread( thread
, violent_death
? SIGTERM
: 0 );
729 if (thread
->request_fd
== thread
->obj
.fd
) thread
->request_fd
= -1;
730 if (thread
->reply_fd
== thread
->obj
.fd
) thread
->reply_fd
= -1;
731 remove_select_user( &thread
->obj
);
732 cleanup_thread( thread
);
733 release_object( thread
);
736 /* take a snapshot of currently running threads */
737 struct thread_snapshot
*thread_snap( int *count
)
739 struct thread_snapshot
*snapshot
, *ptr
;
740 struct thread
*thread
;
743 for (thread
= first_thread
; thread
; thread
= thread
->next
)
744 if (thread
->state
!= TERMINATED
) total
++;
745 if (!total
|| !(snapshot
= mem_alloc( sizeof(*snapshot
) * total
))) return NULL
;
747 for (thread
= first_thread
; thread
; thread
= thread
->next
)
749 if (thread
->state
== TERMINATED
) continue;
750 ptr
->thread
= thread
;
751 ptr
->count
= thread
->obj
.refcount
;
752 ptr
->priority
= thread
->priority
;
753 grab_object( thread
);
760 /* signal that we are finished booting on the client side */
761 DECL_HANDLER(boot_done
)
763 debug_level
= max( debug_level
, req
->debug_level
);
764 if (current
== booting_thread
)
766 booting_thread
= (struct thread
*)~0UL; /* make sure it doesn't match other threads */
767 lock_master_socket(0); /* allow other clients now */
771 /* create a new thread */
772 DECL_HANDLER(new_thread
)
774 struct thread
*thread
;
775 int request_fd
= thread_get_inflight_fd( current
, req
->request_fd
);
777 if (request_fd
== -1 || fcntl( request_fd
, F_SETFL
, O_NONBLOCK
) == -1)
779 if (request_fd
!= -1) close( request_fd
);
780 set_error( STATUS_INVALID_HANDLE
);
784 if ((thread
= create_thread( request_fd
, current
->process
)))
786 if (req
->suspend
) thread
->suspend
++;
787 reply
->tid
= get_thread_id( thread
);
788 if ((reply
->handle
= alloc_handle( current
->process
, thread
,
789 THREAD_ALL_ACCESS
, req
->inherit
)))
791 /* thread object will be released when the thread gets killed */
794 kill_thread( thread
, 1 );
798 /* initialize a new thread */
799 DECL_HANDLER(init_thread
)
801 int reply_fd
= thread_get_inflight_fd( current
, req
->reply_fd
);
802 int wait_fd
= thread_get_inflight_fd( current
, req
->wait_fd
);
804 if (current
->unix_pid
)
806 fatal_protocol_error( current
, "init_thread: already running\n" );
809 if (reply_fd
== -1 || fcntl( reply_fd
, F_SETFL
, O_NONBLOCK
) == -1)
811 fatal_protocol_error( current
, "bad reply fd\n" );
816 fatal_protocol_error( current
, "bad wait fd\n" );
820 current
->unix_pid
= req
->unix_pid
;
821 current
->teb
= req
->teb
;
822 current
->reply_fd
= reply_fd
;
823 current
->wait_fd
= wait_fd
;
825 if (current
->suspend
+ current
->process
->suspend
> 0) stop_thread( current
);
826 if (current
->process
->running_threads
> 1)
827 generate_debug_event( current
, CREATE_THREAD_DEBUG_EVENT
, req
->entry
);
829 reply
->pid
= get_process_id( current
->process
);
830 reply
->tid
= get_thread_id( current
);
831 reply
->boot
= (current
== booting_thread
);
832 reply
->version
= SERVER_PROTOCOL_VERSION
;
836 if (reply_fd
!= -1) close( reply_fd
);
837 if (wait_fd
!= -1) close( wait_fd
);
840 /* terminate a thread */
841 DECL_HANDLER(terminate_thread
)
843 struct thread
*thread
;
847 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_TERMINATE
)))
849 thread
->exit_code
= req
->exit_code
;
850 if (thread
!= current
) kill_thread( thread
, 1 );
854 reply
->last
= (thread
->process
->running_threads
== 1);
856 release_object( thread
);
860 /* open a handle to a thread */
861 DECL_HANDLER(open_thread
)
863 struct thread
*thread
= get_thread_from_id( req
->tid
);
868 reply
->handle
= alloc_handle( current
->process
, thread
, req
->access
, req
->inherit
);
869 release_object( thread
);
873 /* fetch information about a thread */
874 DECL_HANDLER(get_thread_info
)
876 struct thread
*thread
;
877 obj_handle_t handle
= req
->handle
;
879 if (!handle
) thread
= get_thread_from_id( req
->tid_in
);
880 else thread
= get_thread_from_handle( req
->handle
, THREAD_QUERY_INFORMATION
);
884 reply
->tid
= get_thread_id( thread
);
885 reply
->teb
= thread
->teb
;
886 reply
->exit_code
= (thread
->state
== TERMINATED
) ? thread
->exit_code
: STILL_ACTIVE
;
887 reply
->priority
= thread
->priority
;
888 reply
->creation_time
= thread
->creation_time
;
889 reply
->exit_time
= thread
->exit_time
;
891 release_object( thread
);
895 /* set information about a thread */
896 DECL_HANDLER(set_thread_info
)
898 struct thread
*thread
;
900 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SET_INFORMATION
)))
902 set_thread_info( thread
, req
);
903 release_object( thread
);
907 /* suspend a thread */
908 DECL_HANDLER(suspend_thread
)
910 struct thread
*thread
;
912 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SUSPEND_RESUME
)))
914 if (thread
->state
== TERMINATED
) set_error( STATUS_ACCESS_DENIED
);
915 else reply
->count
= suspend_thread( thread
, 1 );
916 release_object( thread
);
920 /* resume a thread */
921 DECL_HANDLER(resume_thread
)
923 struct thread
*thread
;
925 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SUSPEND_RESUME
)))
927 if (thread
->state
== TERMINATED
) set_error( STATUS_ACCESS_DENIED
);
928 else reply
->count
= resume_thread( thread
);
929 release_object( thread
);
933 /* select on a handle list */
936 int count
= get_req_data_size() / sizeof(int);
937 select_on( count
, req
->cookie
, get_req_data(), req
->flags
, req
->sec
, req
->usec
);
940 /* queue an APC for a thread */
941 DECL_HANDLER(queue_apc
)
943 struct thread
*thread
;
944 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SET_CONTEXT
)))
946 thread_queue_apc( thread
, NULL
, req
->func
, APC_USER
, !req
->user
, 1, req
->param
);
947 release_object( thread
);
951 /* get next APC to call */
952 DECL_HANDLER(get_apc
)
954 struct thread_apc
*apc
;
959 if (!(apc
= thread_dequeue_apc( current
, !req
->alertable
)))
963 reply
->type
= APC_NONE
;
966 /* Optimization: ignore APCs that have a NULL func; they are only used
967 * to wake up a thread, but since we got here the thread woke up already.
968 * Exception: for APC_ASYNC_IO, func == NULL is legal.
970 if (apc
->func
|| apc
->type
== APC_ASYNC_IO
) break;
973 size
= apc
->nb_args
* sizeof(apc
->args
[0]);
974 if (size
> get_reply_max_size()) size
= get_reply_max_size();
975 reply
->func
= apc
->func
;
976 reply
->type
= apc
->type
;
977 set_reply_data( apc
->args
, size
);
981 /* fetch a selector entry for a thread */
982 DECL_HANDLER(get_selector_entry
)
984 struct thread
*thread
;
985 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_QUERY_INFORMATION
)))
987 get_selector_entry( thread
, req
->entry
, &reply
->base
, &reply
->limit
, &reply
->flags
);
988 release_object( thread
);