2 * Server-side thread management
4 * Copyright (C) 1998 Alexandre Julliard
17 #ifdef HAVE_SYS_MMAN_H
20 #include <sys/types.h>
37 struct thread_wait
*next
; /* next wait structure for this thread */
38 struct thread
*thread
; /* owner thread */
39 int count
; /* count of objects */
41 void *cookie
; /* magic cookie to return to client */
42 struct timeval timeout
;
43 struct timeout_user
*user
;
44 struct wait_queue_entry queues
[1];
47 /* asynchronous procedure calls */
51 struct thread_apc
*next
; /* queue linked list */
52 struct thread_apc
*prev
;
53 struct object
*owner
; /* object that queued this apc */
54 void *func
; /* function to call in client */
55 enum apc_type type
; /* type of apc function */
56 int nb_args
; /* number of arguments */
57 void *args
[1]; /* function arguments */
61 /* thread operations */
63 static void dump_thread( struct object
*obj
, int verbose
);
64 static int thread_signaled( struct object
*obj
, struct thread
*thread
);
65 static void thread_poll_event( struct object
*obj
, int event
);
66 static void destroy_thread( struct object
*obj
);
67 static struct thread_apc
*thread_dequeue_apc( struct thread
*thread
, int system_only
);
69 static const struct object_ops thread_ops
=
71 sizeof(struct thread
), /* size */
72 dump_thread
, /* dump */
73 add_queue
, /* add_queue */
74 remove_queue
, /* remove_queue */
75 thread_signaled
, /* signaled */
76 no_satisfied
, /* satisfied */
77 NULL
, /* get_poll_events */
78 thread_poll_event
, /* poll_event */
79 no_get_fd
, /* get_fd */
81 no_get_file_info
, /* get_file_info */
82 destroy_thread
/* destroy */
85 static struct thread
*first_thread
;
86 static struct thread
*booting_thread
;
88 /* initialize the structure for a newly allocated thread */
89 inline static void init_thread_structure( struct thread
*thread
)
93 thread
->unix_pid
= 0; /* not known yet */
94 thread
->context
= NULL
;
97 thread
->debug_ctx
= NULL
;
98 thread
->debug_event
= NULL
;
102 thread
->system_apc
.head
= NULL
;
103 thread
->system_apc
.tail
= NULL
;
104 thread
->user_apc
.head
= NULL
;
105 thread
->user_apc
.tail
= NULL
;
107 thread
->request_fd
= NULL
;
108 thread
->reply_fd
= -1;
109 thread
->wait_fd
= -1;
110 thread
->state
= RUNNING
;
111 thread
->attached
= 0;
112 thread
->exit_code
= 0;
115 thread
->priority
= THREAD_PRIORITY_NORMAL
;
116 thread
->affinity
= 1;
118 thread
->buffer
= (void *)-1;
120 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
121 thread
->inflight
[i
].server
= thread
->inflight
[i
].client
= -1;
124 /* create a new thread */
125 struct thread
*create_thread( int fd
, struct process
*process
)
127 struct thread
*thread
;
129 if (!(thread
= alloc_object( &thread_ops
, fd
))) return NULL
;
131 init_thread_structure( thread
);
133 thread
->process
= (struct process
*)grab_object( process
);
134 if (!current
) current
= thread
;
136 if (!booting_thread
) /* first thread ever */
138 booting_thread
= thread
;
139 lock_master_socket(1);
142 if ((thread
->next
= first_thread
) != NULL
) thread
->next
->prev
= thread
;
143 first_thread
= thread
;
145 fcntl( fd
, F_SETFL
, O_NONBLOCK
);
146 set_select_events( &thread
->obj
, POLLIN
); /* start listening to events */
147 add_process_thread( thread
->process
, thread
);
151 /* handle a client event */
152 static void thread_poll_event( struct object
*obj
, int event
)
154 struct thread
*thread
= (struct thread
*)obj
;
155 assert( obj
->ops
== &thread_ops
);
157 if (event
& (POLLERR
| POLLHUP
)) kill_thread( thread
, 0 );
158 else if (event
& POLLIN
) read_request( thread
);
161 /* cleanup everything that is no longer needed by a dead thread */
162 /* used by destroy_thread and kill_thread */
163 static void cleanup_thread( struct thread
*thread
)
166 struct thread_apc
*apc
;
168 while ((apc
= thread_dequeue_apc( thread
, 0 ))) free( apc
);
169 if (thread
->buffer
!= (void *)-1) munmap( thread
->buffer
, MAX_REQUEST_LENGTH
);
170 if (thread
->reply_fd
!= -1) close( thread
->reply_fd
);
171 if (thread
->wait_fd
!= -1) close( thread
->wait_fd
);
172 if (thread
->request_fd
) release_object( thread
->request_fd
);
175 if (thread
->process
->queue
== thread
->queue
)
177 release_object( thread
->process
->queue
);
178 thread
->process
->queue
= NULL
;
180 release_object( thread
->queue
);
181 thread
->queue
= NULL
;
183 destroy_thread_windows( thread
);
184 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
186 if (thread
->inflight
[i
].client
!= -1)
188 close( thread
->inflight
[i
].server
);
189 thread
->inflight
[i
].client
= thread
->inflight
[i
].server
= -1;
192 thread
->buffer
= (void *)-1;
193 thread
->reply_fd
= -1;
194 thread
->wait_fd
= -1;
195 thread
->request_fd
= NULL
;
198 /* destroy a thread when its refcount is 0 */
199 static void destroy_thread( struct object
*obj
)
201 struct thread_apc
*apc
;
202 struct thread
*thread
= (struct thread
*)obj
;
203 assert( obj
->ops
== &thread_ops
);
205 assert( !thread
->debug_ctx
); /* cannot still be debugging something */
206 if (thread
->next
) thread
->next
->prev
= thread
->prev
;
207 if (thread
->prev
) thread
->prev
->next
= thread
->next
;
208 else first_thread
= thread
->next
;
209 while ((apc
= thread_dequeue_apc( thread
, 0 ))) free( apc
);
210 if (thread
->info
) release_object( thread
->info
);
211 cleanup_thread( thread
);
212 release_object( thread
->process
);
215 /* dump a thread on stdout for debugging purposes */
216 static void dump_thread( struct object
*obj
, int verbose
)
218 struct thread
*thread
= (struct thread
*)obj
;
219 assert( obj
->ops
== &thread_ops
);
221 fprintf( stderr
, "Thread pid=%d teb=%p state=%d\n",
222 thread
->unix_pid
, thread
->teb
, thread
->state
);
225 static int thread_signaled( struct object
*obj
, struct thread
*thread
)
227 struct thread
*mythread
= (struct thread
*)obj
;
228 return (mythread
->state
== TERMINATED
);
231 /* get a thread pointer from a thread id (and increment the refcount) */
232 struct thread
*get_thread_from_id( void *id
)
234 struct thread
*t
= first_thread
;
235 while (t
&& (t
!= id
)) t
= t
->next
;
236 if (t
) grab_object( t
);
237 else set_error( STATUS_INVALID_PARAMETER
);
241 /* get a thread from a handle (and increment the refcount) */
242 struct thread
*get_thread_from_handle( handle_t handle
, unsigned int access
)
244 return (struct thread
*)get_handle_obj( current
->process
, handle
,
245 access
, &thread_ops
);
248 /* find a thread from a Unix pid */
249 struct thread
*get_thread_from_pid( int pid
)
251 struct thread
*t
= first_thread
;
252 while (t
&& (t
->unix_pid
!= pid
)) t
= t
->next
;
256 /* set all information about a thread */
257 static void set_thread_info( struct thread
*thread
,
258 struct set_thread_info_request
*req
)
260 if (req
->mask
& SET_THREAD_INFO_PRIORITY
)
261 thread
->priority
= req
->priority
;
262 if (req
->mask
& SET_THREAD_INFO_AFFINITY
)
264 if (req
->affinity
!= 1) set_error( STATUS_INVALID_PARAMETER
);
265 else thread
->affinity
= req
->affinity
;
269 /* suspend a thread */
270 int suspend_thread( struct thread
*thread
, int check_limit
)
272 int old_count
= thread
->suspend
;
273 if (thread
->suspend
< MAXIMUM_SUSPEND_COUNT
|| !check_limit
)
275 if (!(thread
->process
->suspend
+ thread
->suspend
++)) stop_thread( thread
);
277 else set_error( STATUS_SUSPEND_COUNT_EXCEEDED
);
281 /* resume a thread */
282 int resume_thread( struct thread
*thread
)
284 int old_count
= thread
->suspend
;
285 if (thread
->suspend
> 0)
287 if (!(--thread
->suspend
+ thread
->process
->suspend
)) continue_thread( thread
);
292 /* add a thread to an object wait queue; return 1 if OK, 0 on error */
293 int add_queue( struct object
*obj
, struct wait_queue_entry
*entry
)
297 entry
->prev
= obj
->tail
;
299 if (obj
->tail
) obj
->tail
->next
= entry
;
300 else obj
->head
= entry
;
305 /* remove a thread from an object wait queue */
306 void remove_queue( struct object
*obj
, struct wait_queue_entry
*entry
)
308 if (entry
->next
) entry
->next
->prev
= entry
->prev
;
309 else obj
->tail
= entry
->prev
;
310 if (entry
->prev
) entry
->prev
->next
= entry
->next
;
311 else obj
->head
= entry
->next
;
312 release_object( obj
);
316 static void end_wait( struct thread
*thread
)
318 struct thread_wait
*wait
= thread
->wait
;
319 struct wait_queue_entry
*entry
;
323 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
324 entry
->obj
->ops
->remove_queue( entry
->obj
, entry
);
325 if (wait
->user
) remove_timeout_user( wait
->user
);
326 thread
->wait
= wait
->next
;
330 /* build the thread wait structure */
331 static int wait_on( int count
, struct object
*objects
[], int flags
, int sec
, int usec
)
333 struct thread_wait
*wait
;
334 struct wait_queue_entry
*entry
;
337 if (!(wait
= mem_alloc( sizeof(*wait
) + (count
-1) * sizeof(*entry
) ))) return 0;
338 wait
->next
= current
->wait
;
339 wait
->thread
= current
;
343 current
->wait
= wait
;
344 if (flags
& SELECT_TIMEOUT
)
346 wait
->timeout
.tv_sec
= sec
;
347 wait
->timeout
.tv_usec
= usec
;
350 for (i
= 0, entry
= wait
->queues
; i
< count
; i
++, entry
++)
352 struct object
*obj
= objects
[i
];
353 entry
->thread
= current
;
354 if (!obj
->ops
->add_queue( obj
, entry
))
364 /* check if the thread waiting condition is satisfied */
365 static int check_wait( struct thread
*thread
)
368 struct thread_wait
*wait
= thread
->wait
;
369 struct wait_queue_entry
*entry
= wait
->queues
;
372 if (wait
->flags
& SELECT_ALL
)
375 /* Note: we must check them all anyway, as some objects may
376 * want to do something when signaled, even if others are not */
377 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
378 not_ok
|= !entry
->obj
->ops
->signaled( entry
->obj
, thread
);
379 if (not_ok
) goto other_checks
;
380 /* Wait satisfied: tell it to all objects */
382 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
383 if (entry
->obj
->ops
->satisfied( entry
->obj
, thread
))
384 signaled
= STATUS_ABANDONED_WAIT_0
;
389 for (i
= 0, entry
= wait
->queues
; i
< wait
->count
; i
++, entry
++)
391 if (!entry
->obj
->ops
->signaled( entry
->obj
, thread
)) continue;
392 /* Wait satisfied: tell it to the object */
394 if (entry
->obj
->ops
->satisfied( entry
->obj
, thread
))
395 signaled
= i
+ STATUS_ABANDONED_WAIT_0
;
401 if ((wait
->flags
& SELECT_INTERRUPTIBLE
) && thread
->system_apc
.head
) return STATUS_USER_APC
;
402 if ((wait
->flags
& SELECT_ALERTABLE
) && thread
->user_apc
.head
) return STATUS_USER_APC
;
403 if (wait
->flags
& SELECT_TIMEOUT
)
406 gettimeofday( &now
, NULL
);
407 if (!time_before( &now
, &wait
->timeout
)) return STATUS_TIMEOUT
;
412 /* send the wakeup signal to a thread */
413 static int send_thread_wakeup( struct thread
*thread
, void *cookie
, int signaled
)
415 struct wake_up_reply reply
;
418 reply
.cookie
= cookie
;
419 reply
.signaled
= signaled
;
420 if ((ret
= write( thread
->wait_fd
, &reply
, sizeof(reply
) )) == sizeof(reply
)) return 0;
422 fatal_protocol_error( thread
, "partial wakeup write %d\n", ret
);
423 else if (errno
== EPIPE
)
424 kill_thread( thread
, 0 ); /* normal death */
426 fatal_protocol_perror( thread
, "write" );
430 /* attempt to wake up a thread */
431 /* return >0 if OK, 0 if the wait condition is still not satisfied */
432 static int wake_thread( struct thread
*thread
)
437 for (count
= 0; thread
->wait
; count
++)
439 if ((signaled
= check_wait( thread
)) == -1) break;
441 cookie
= thread
->wait
->cookie
;
442 if (debug_level
) fprintf( stderr
, "%08x: *wakeup* signaled=%d cookie=%p\n",
443 (unsigned int)thread
, signaled
, cookie
);
445 if (send_thread_wakeup( thread
, cookie
, signaled
) == -1) /* error */
451 /* thread wait timeout */
452 static void thread_timeout( void *ptr
)
454 struct thread_wait
*wait
= ptr
;
455 struct thread
*thread
= wait
->thread
;
456 void *cookie
= wait
->cookie
;
459 if (thread
->wait
!= wait
) return; /* not the top-level wait, ignore it */
461 if (debug_level
) fprintf( stderr
, "%08x: *wakeup* signaled=%d cookie=%p\n",
462 (unsigned int)thread
, STATUS_TIMEOUT
, cookie
);
464 send_thread_wakeup( thread
, cookie
, STATUS_TIMEOUT
);
465 /* check if other objects have become signaled in the meantime */
466 wake_thread( thread
);
469 /* select on a list of handles */
470 static void select_on( int count
, void *cookie
, handle_t
*handles
, int flags
, int sec
, int usec
)
473 struct object
*objects
[MAXIMUM_WAIT_OBJECTS
];
475 if ((count
< 0) || (count
> MAXIMUM_WAIT_OBJECTS
))
477 set_error( STATUS_INVALID_PARAMETER
);
480 for (i
= 0; i
< count
; i
++)
482 if (!(objects
[i
] = get_handle_obj( current
->process
, handles
[i
], SYNCHRONIZE
, NULL
)))
486 if (i
< count
) goto done
;
487 if (!wait_on( count
, objects
, flags
, sec
, usec
)) goto done
;
489 if ((ret
= check_wait( current
)) != -1)
491 /* condition is already satisfied */
497 /* now we need to wait */
498 if (flags
& SELECT_TIMEOUT
)
500 if (!(current
->wait
->user
= add_timeout_user( ¤t
->wait
->timeout
,
501 thread_timeout
, current
->wait
)))
507 current
->wait
->cookie
= cookie
;
508 set_error( STATUS_PENDING
);
511 while (--i
>= 0) release_object( objects
[i
] );
514 /* attempt to wake threads sleeping on the object wait queue */
515 void wake_up( struct object
*obj
, int max
)
517 struct wait_queue_entry
*entry
= obj
->head
;
521 struct thread
*thread
= entry
->thread
;
523 if (wake_thread( thread
))
525 if (max
&& !--max
) break;
530 /* queue an async procedure call */
531 int thread_queue_apc( struct thread
*thread
, struct object
*owner
, void *func
,
532 enum apc_type type
, int system
, int nb_args
, ... )
534 struct thread_apc
*apc
;
535 struct apc_queue
*queue
= system
? &thread
->system_apc
: &thread
->user_apc
;
537 /* cancel a possible previous APC with the same owner */
538 if (owner
) thread_cancel_apc( thread
, owner
, system
);
540 if (!(apc
= mem_alloc( sizeof(*apc
) + (nb_args
-1)*sizeof(apc
->args
[0]) ))) return 0;
541 apc
->prev
= queue
->tail
;
546 apc
->nb_args
= nb_args
;
551 va_start( args
, nb_args
);
552 for (i
= 0; i
< nb_args
; i
++) apc
->args
[i
] = va_arg( args
, void * );
556 if (!apc
->prev
) /* first one */
559 wake_thread( thread
);
564 /* cancel the async procedure call owned by a specific object */
565 void thread_cancel_apc( struct thread
*thread
, struct object
*owner
, int system
)
567 struct thread_apc
*apc
;
568 struct apc_queue
*queue
= system
? &thread
->system_apc
: &thread
->user_apc
;
569 for (apc
= queue
->head
; apc
; apc
= apc
->next
)
571 if (apc
->owner
!= owner
) continue;
572 if (apc
->next
) apc
->next
->prev
= apc
->prev
;
573 else queue
->tail
= apc
->prev
;
574 if (apc
->prev
) apc
->prev
->next
= apc
->next
;
575 else queue
->head
= apc
->next
;
581 /* remove the head apc from the queue; the returned pointer must be freed by the caller */
582 static struct thread_apc
*thread_dequeue_apc( struct thread
*thread
, int system_only
)
584 struct thread_apc
*apc
;
585 struct apc_queue
*queue
= &thread
->system_apc
;
587 if (!queue
->head
&& !system_only
) queue
= &thread
->user_apc
;
588 if ((apc
= queue
->head
))
590 if (apc
->next
) apc
->next
->prev
= NULL
;
591 else queue
->tail
= NULL
;
592 queue
->head
= apc
->next
;
597 /* add an fd to the inflight list */
598 /* return list index, or -1 on error */
599 int thread_add_inflight_fd( struct thread
*thread
, int client
, int server
)
603 if (server
== -1) return -1;
610 /* first check if we already have an entry for this fd */
611 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
612 if (thread
->inflight
[i
].client
== client
)
614 close( thread
->inflight
[i
].server
);
615 thread
->inflight
[i
].server
= server
;
619 /* now find a free spot to store it */
620 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
621 if (thread
->inflight
[i
].client
== -1)
623 thread
->inflight
[i
].client
= client
;
624 thread
->inflight
[i
].server
= server
;
630 /* get an inflight fd and purge it from the list */
631 /* the fd must be closed when no longer used */
632 int thread_get_inflight_fd( struct thread
*thread
, int client
)
636 if (client
== -1) return -1;
640 for (i
= 0; i
< MAX_INFLIGHT_FDS
; i
++)
642 if (thread
->inflight
[i
].client
== client
)
644 ret
= thread
->inflight
[i
].server
;
645 thread
->inflight
[i
].server
= thread
->inflight
[i
].client
= -1;
649 } while (!receive_fd( thread
->process
)); /* in case it is still in the socket buffer */
653 /* retrieve an LDT selector entry */
654 static void get_selector_entry( struct thread
*thread
, int entry
,
655 unsigned int *base
, unsigned int *limit
,
656 unsigned char *flags
)
658 if (!thread
->process
->ldt_copy
)
660 set_error( STATUS_ACCESS_DENIED
);
665 set_error( STATUS_INVALID_PARAMETER
); /* FIXME */
668 if (suspend_for_ptrace( thread
))
670 unsigned char flags_buf
[4];
671 int *addr
= (int *)thread
->process
->ldt_copy
+ entry
;
672 if (read_thread_int( thread
, addr
, base
) == -1) goto done
;
673 if (read_thread_int( thread
, addr
+ 8192, limit
) == -1) goto done
;
674 addr
= (int *)thread
->process
->ldt_copy
+ 2*8192 + (entry
>> 2);
675 if (read_thread_int( thread
, addr
, (int *)flags_buf
) == -1) goto done
;
676 *flags
= flags_buf
[entry
& 3];
678 resume_thread( thread
);
682 /* kill a thread on the spot */
683 void kill_thread( struct thread
*thread
, int violent_death
)
685 if (thread
->state
== TERMINATED
) return; /* already killed */
686 thread
->state
= TERMINATED
;
687 if (current
== thread
) current
= NULL
;
689 fprintf( stderr
,"%08x: *killed* exit_code=%d\n",
690 (unsigned int)thread
, thread
->exit_code
);
693 while (thread
->wait
) end_wait( thread
);
694 send_thread_wakeup( thread
, NULL
, STATUS_PENDING
);
695 /* if it is waiting on the socket, we don't need to send a SIGTERM */
698 debug_exit_thread( thread
);
699 abandon_mutexes( thread
);
700 remove_process_thread( thread
->process
, thread
);
701 wake_up( &thread
->obj
, 0 );
702 detach_thread( thread
, violent_death
? SIGTERM
: 0 );
703 remove_select_user( &thread
->obj
);
704 cleanup_thread( thread
);
705 release_object( thread
);
708 /* take a snapshot of currently running threads */
709 struct thread_snapshot
*thread_snap( int *count
)
711 struct thread_snapshot
*snapshot
, *ptr
;
712 struct thread
*thread
;
715 for (thread
= first_thread
; thread
; thread
= thread
->next
)
716 if (thread
->state
!= TERMINATED
) total
++;
717 if (!total
|| !(snapshot
= mem_alloc( sizeof(*snapshot
) * total
))) return NULL
;
719 for (thread
= first_thread
; thread
; thread
= thread
->next
)
721 if (thread
->state
== TERMINATED
) continue;
722 ptr
->thread
= thread
;
723 ptr
->count
= thread
->obj
.refcount
;
724 ptr
->priority
= thread
->priority
;
725 grab_object( thread
);
732 /* signal that we are finished booting on the client side */
733 DECL_HANDLER(boot_done
)
735 debug_level
= max( debug_level
, req
->debug_level
);
736 if (current
== booting_thread
)
738 booting_thread
= (struct thread
*)~0UL; /* make sure it doesn't match other threads */
739 lock_master_socket(0); /* allow other clients now */
743 /* create a new thread */
744 DECL_HANDLER(new_thread
)
746 struct thread
*thread
;
747 int request_fd
= thread_get_inflight_fd( current
, req
->request_fd
);
749 if (request_fd
== -1)
751 set_error( STATUS_INVALID_HANDLE
);
755 if ((thread
= create_thread( request_fd
, current
->process
)))
757 if (req
->suspend
) thread
->suspend
++;
759 if ((req
->handle
= alloc_handle( current
->process
, thread
,
760 THREAD_ALL_ACCESS
, req
->inherit
)))
762 /* thread object will be released when the thread gets killed */
765 kill_thread( thread
, 1 );
770 /* initialize a new thread */
771 DECL_HANDLER(init_thread
)
773 int reply_fd
= thread_get_inflight_fd( current
, req
->reply_fd
);
774 int wait_fd
= thread_get_inflight_fd( current
, req
->wait_fd
);
776 if (current
->unix_pid
)
778 fatal_protocol_error( current
, "init_thread: already running\n" );
783 fatal_protocol_error( current
, "bad reply fd\n" );
788 fatal_protocol_error( current
, "bad wait fd\n" );
792 current
->unix_pid
= req
->unix_pid
;
793 current
->teb
= req
->teb
;
794 current
->reply_fd
= reply_fd
;
795 current
->wait_fd
= wait_fd
;
797 if (current
->suspend
+ current
->process
->suspend
> 0) stop_thread( current
);
798 if (current
->process
->running_threads
> 1)
799 generate_debug_event( current
, CREATE_THREAD_DEBUG_EVENT
, req
->entry
);
801 req
->pid
= get_process_id( current
->process
);
802 req
->tid
= get_thread_id( current
);
803 req
->boot
= (current
== booting_thread
);
804 req
->version
= SERVER_PROTOCOL_VERSION
;
808 if (reply_fd
!= -1) close( reply_fd
);
809 if (wait_fd
!= -1) close( wait_fd
);
812 /* set the shared buffer for a thread */
813 DECL_HANDLER(set_thread_buffer
)
815 unsigned int size
= MAX_REQUEST_LENGTH
;
816 unsigned int offset
= 0;
817 int fd
= thread_get_inflight_fd( current
, req
->fd
);
820 req
->offset
= offset
;
824 if (ftruncate( fd
, size
) == -1) file_set_error();
827 void *buffer
= mmap( 0, size
, PROT_READ
| PROT_WRITE
, MAP_SHARED
, fd
, offset
);
828 if (buffer
== (void *)-1) file_set_error();
831 if (current
->buffer
!= (void *)-1) munmap( current
->buffer
, size
);
832 current
->buffer
= buffer
;
837 else set_error( STATUS_INVALID_HANDLE
);
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 req
->last
= (thread
->process
->running_threads
== 1);
856 release_object( thread
);
860 /* fetch information about a thread */
861 DECL_HANDLER(get_thread_info
)
863 struct thread
*thread
;
864 handle_t handle
= req
->handle
;
866 if (!handle
) thread
= get_thread_from_id( req
->tid_in
);
867 else thread
= get_thread_from_handle( req
->handle
, THREAD_QUERY_INFORMATION
);
871 req
->tid
= get_thread_id( thread
);
872 req
->teb
= thread
->teb
;
873 req
->exit_code
= (thread
->state
== TERMINATED
) ? thread
->exit_code
: STILL_ACTIVE
;
874 req
->priority
= thread
->priority
;
875 release_object( thread
);
879 /* set information about a thread */
880 DECL_HANDLER(set_thread_info
)
882 struct thread
*thread
;
884 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SET_INFORMATION
)))
886 set_thread_info( thread
, req
);
887 release_object( thread
);
891 /* suspend a thread */
892 DECL_HANDLER(suspend_thread
)
894 struct thread
*thread
;
896 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SUSPEND_RESUME
)))
898 req
->count
= suspend_thread( thread
, 1 );
899 release_object( thread
);
903 /* resume a thread */
904 DECL_HANDLER(resume_thread
)
906 struct thread
*thread
;
908 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SUSPEND_RESUME
)))
910 req
->count
= resume_thread( thread
);
911 release_object( thread
);
915 /* select on a handle list */
918 int count
= get_req_data_size(req
) / sizeof(int);
919 select_on( count
, req
->cookie
, get_req_data(req
), req
->flags
, req
->sec
, req
->usec
);
922 /* queue an APC for a thread */
923 DECL_HANDLER(queue_apc
)
925 struct thread
*thread
;
926 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_SET_CONTEXT
)))
928 thread_queue_apc( thread
, NULL
, req
->func
, APC_USER
, !req
->user
, 1, req
->param
);
929 release_object( thread
);
933 /* get next APC to call */
934 DECL_HANDLER(get_apc
)
936 struct thread_apc
*apc
;
941 if (!(apc
= thread_dequeue_apc( current
, !req
->alertable
)))
945 req
->type
= APC_NONE
;
946 set_req_data_size( req
, 0 );
949 /* Optimization: ignore APCs that have a NULL func; they are only used
950 * to wake up a thread, but since we got here the thread woke up already.
952 if (apc
->func
) break;
955 size
= apc
->nb_args
* sizeof(apc
->args
[0]);
956 if (size
> get_req_data_size(req
)) size
= get_req_data_size(req
);
957 req
->func
= apc
->func
;
958 req
->type
= apc
->type
;
959 memcpy( get_req_data(req
), apc
->args
, size
);
960 set_req_data_size( req
, size
);
964 /* fetch a selector entry for a thread */
965 DECL_HANDLER(get_selector_entry
)
967 struct thread
*thread
;
968 if ((thread
= get_thread_from_handle( req
->handle
, THREAD_QUERY_INFORMATION
)))
970 get_selector_entry( thread
, req
->entry
, &req
->base
, &req
->limit
, &req
->flags
);
971 release_object( thread
);