883 lines
26 KiB
C
883 lines
26 KiB
C
/*
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* Server-side thread management
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*
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* Copyright (C) 1998 Alexandre Julliard
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*/
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#include "config.h"
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#include <assert.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#endif
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#include <sys/types.h>
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#ifdef HAVE_SYS_SOCKET_H
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# include <sys/socket.h>
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#endif
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#include <sys/uio.h>
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#include <unistd.h>
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#include <stdarg.h>
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#include "winbase.h"
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#include "handle.h"
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#include "process.h"
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#include "thread.h"
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#include "request.h"
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/* thread queues */
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struct thread_wait
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{
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int count; /* count of objects */
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int flags;
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struct timeval timeout;
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struct timeout_user *user;
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struct wait_queue_entry queues[1];
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};
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/* asynchronous procedure calls */
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struct thread_apc
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{
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struct thread_apc *next; /* queue linked list */
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struct thread_apc *prev;
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struct object *owner; /* object that queued this apc */
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void *func; /* function to call in client */
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enum apc_type type; /* type of apc function */
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int nb_args; /* number of arguments */
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void *args[1]; /* function arguments */
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};
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/* thread operations */
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static void dump_thread( struct object *obj, int verbose );
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static int thread_signaled( struct object *obj, struct thread *thread );
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extern void thread_poll_event( struct object *obj, int event );
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static void destroy_thread( struct object *obj );
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static struct thread_apc *thread_dequeue_apc( struct thread *thread, int system_only );
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static const struct object_ops thread_ops =
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{
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sizeof(struct thread), /* size */
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dump_thread, /* dump */
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add_queue, /* add_queue */
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remove_queue, /* remove_queue */
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thread_signaled, /* signaled */
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no_satisfied, /* satisfied */
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NULL, /* get_poll_events */
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thread_poll_event, /* poll_event */
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no_get_fd, /* get_fd */
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no_flush, /* flush */
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no_get_file_info, /* get_file_info */
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destroy_thread /* destroy */
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};
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static struct thread *first_thread;
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static struct thread *booting_thread;
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/* allocate the buffer for the communication with the client */
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static int alloc_client_buffer( struct thread *thread )
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{
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union generic_request *req;
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int fd = -1, fd_pipe[2], wait_pipe[2];
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wait_pipe[0] = wait_pipe[1] = -1;
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if (pipe( fd_pipe ) == -1)
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{
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file_set_error();
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return 0;
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}
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if (pipe( wait_pipe ) == -1) goto error;
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if ((fd = create_anonymous_file()) == -1) goto error;
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if (ftruncate( fd, MAX_REQUEST_LENGTH ) == -1) goto error;
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if ((thread->buffer = mmap( 0, MAX_REQUEST_LENGTH, PROT_READ | PROT_WRITE,
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MAP_SHARED, fd, 0 )) == (void*)-1) goto error;
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thread->buffer_info = (struct server_buffer_info *)((char *)thread->buffer + MAX_REQUEST_LENGTH) - 1;
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if (!(thread->request_fd = create_request_socket( thread ))) goto error;
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thread->reply_fd = fd_pipe[1];
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thread->wait_fd = wait_pipe[1];
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/* make the pipes non-blocking */
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fcntl( fd_pipe[1], F_SETFL, O_NONBLOCK );
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fcntl( wait_pipe[1], F_SETFL, O_NONBLOCK );
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/* build the first request into the buffer and send it */
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req = thread->buffer;
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req->get_thread_buffer.pid = get_process_id( thread->process );
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req->get_thread_buffer.tid = get_thread_id( thread );
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req->get_thread_buffer.boot = (thread == booting_thread);
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req->get_thread_buffer.version = SERVER_PROTOCOL_VERSION;
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/* add it here since send_client_fd may call kill_thread */
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add_process_thread( thread->process, thread );
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send_client_fd( thread, fd_pipe[0], 0 );
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send_client_fd( thread, wait_pipe[0], 0 );
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send_client_fd( thread, fd, 0 );
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send_reply( thread, req );
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close( fd_pipe[0] );
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close( wait_pipe[0] );
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close( fd );
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return 1;
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error:
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file_set_error();
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if (fd != -1) close( fd );
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close( fd_pipe[0] );
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close( fd_pipe[1] );
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if (wait_pipe[0] != -1) close( wait_pipe[0] );
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if (wait_pipe[1] != -1) close( wait_pipe[1] );
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return 0;
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}
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/* create a new thread */
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struct thread *create_thread( int fd, struct process *process )
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{
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struct thread *thread;
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int flags = fcntl( fd, F_GETFL, 0 );
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fcntl( fd, F_SETFL, flags | O_NONBLOCK );
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if (!(thread = alloc_object( &thread_ops, fd ))) return NULL;
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thread->unix_pid = 0; /* not known yet */
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thread->context = NULL;
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thread->teb = NULL;
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thread->mutex = NULL;
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thread->debug_ctx = NULL;
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thread->debug_event = NULL;
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thread->queue = NULL;
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thread->info = NULL;
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thread->wait = NULL;
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thread->system_apc.head = NULL;
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thread->system_apc.tail = NULL;
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thread->user_apc.head = NULL;
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thread->user_apc.tail = NULL;
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thread->error = 0;
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thread->pass_fd = -1;
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thread->request_fd = NULL;
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thread->reply_fd = -1;
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thread->wait_fd = -1;
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thread->state = RUNNING;
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thread->attached = 0;
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thread->exit_code = 0;
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thread->next = NULL;
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thread->prev = NULL;
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thread->priority = THREAD_PRIORITY_NORMAL;
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thread->affinity = 1;
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thread->suspend = 0;
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thread->buffer = (void *)-1;
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thread->last_req = REQ_GET_THREAD_BUFFER;
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thread->process = (struct process *)grab_object( process );
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if (!current) current = thread;
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if (!booting_thread) /* first thread ever */
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{
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booting_thread = thread;
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lock_master_socket(1);
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}
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if ((thread->next = first_thread) != NULL) thread->next->prev = thread;
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first_thread = thread;
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set_select_events( &thread->obj, POLLIN ); /* start listening to events */
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if (!alloc_client_buffer( thread )) goto error;
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return thread;
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error:
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release_object( thread );
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return NULL;
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}
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/* handle a client event */
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void thread_poll_event( struct object *obj, int event )
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{
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struct thread *thread = (struct thread *)obj;
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assert( obj->ops == &thread_ops );
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if (event & (POLLERR | POLLHUP)) kill_thread( thread, 0 );
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else if (event & POLLIN) read_request( thread );
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}
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/* destroy a thread when its refcount is 0 */
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static void destroy_thread( struct object *obj )
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{
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struct thread_apc *apc;
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struct thread *thread = (struct thread *)obj;
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assert( obj->ops == &thread_ops );
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assert( !thread->debug_ctx ); /* cannot still be debugging something */
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release_object( thread->process );
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if (thread->next) thread->next->prev = thread->prev;
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if (thread->prev) thread->prev->next = thread->next;
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else first_thread = thread->next;
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while ((apc = thread_dequeue_apc( thread, 0 ))) free( apc );
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if (thread->info) release_object( thread->info );
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if (thread->queue) release_object( thread->queue );
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if (thread->buffer != (void *)-1) munmap( thread->buffer, MAX_REQUEST_LENGTH );
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if (thread->reply_fd != -1) close( thread->reply_fd );
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if (thread->wait_fd != -1) close( thread->wait_fd );
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if (thread->pass_fd != -1) close( thread->pass_fd );
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if (thread->request_fd) release_object( thread->request_fd );
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}
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/* dump a thread on stdout for debugging purposes */
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static void dump_thread( struct object *obj, int verbose )
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{
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struct thread *thread = (struct thread *)obj;
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assert( obj->ops == &thread_ops );
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fprintf( stderr, "Thread pid=%d teb=%p state=%d\n",
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thread->unix_pid, thread->teb, thread->state );
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}
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static int thread_signaled( struct object *obj, struct thread *thread )
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{
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struct thread *mythread = (struct thread *)obj;
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return (mythread->state == TERMINATED);
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}
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/* get a thread pointer from a thread id (and increment the refcount) */
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struct thread *get_thread_from_id( void *id )
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{
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struct thread *t = first_thread;
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while (t && (t != id)) t = t->next;
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if (t) grab_object( t );
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return t;
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}
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/* get a thread from a handle (and increment the refcount) */
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struct thread *get_thread_from_handle( handle_t handle, unsigned int access )
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{
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return (struct thread *)get_handle_obj( current->process, handle,
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access, &thread_ops );
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}
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/* find a thread from a Unix pid */
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struct thread *get_thread_from_pid( int pid )
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{
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struct thread *t = first_thread;
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while (t && (t->unix_pid != pid)) t = t->next;
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return t;
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}
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/* set all information about a thread */
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static void set_thread_info( struct thread *thread,
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struct set_thread_info_request *req )
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{
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if (req->mask & SET_THREAD_INFO_PRIORITY)
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thread->priority = req->priority;
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if (req->mask & SET_THREAD_INFO_AFFINITY)
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{
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if (req->affinity != 1) set_error( STATUS_INVALID_PARAMETER );
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else thread->affinity = req->affinity;
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}
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}
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/* suspend a thread */
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int suspend_thread( struct thread *thread, int check_limit )
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{
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int old_count = thread->suspend;
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if (thread->suspend < MAXIMUM_SUSPEND_COUNT || !check_limit)
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{
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if (!(thread->process->suspend + thread->suspend++)) stop_thread( thread );
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}
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else set_error( STATUS_SUSPEND_COUNT_EXCEEDED );
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return old_count;
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}
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/* resume a thread */
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int resume_thread( struct thread *thread )
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{
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int old_count = thread->suspend;
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if (thread->suspend > 0)
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{
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if (!(--thread->suspend + thread->process->suspend)) continue_thread( thread );
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}
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return old_count;
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}
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/* suspend all threads but the current */
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void suspend_all_threads( void )
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{
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struct thread *thread;
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for ( thread = first_thread; thread; thread = thread->next )
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if ( thread != current )
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suspend_thread( thread, 0 );
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}
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/* resume all threads but the current */
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void resume_all_threads( void )
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{
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struct thread *thread;
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for ( thread = first_thread; thread; thread = thread->next )
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if ( thread != current )
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resume_thread( thread );
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}
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/* add a thread to an object wait queue; return 1 if OK, 0 on error */
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int add_queue( struct object *obj, struct wait_queue_entry *entry )
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{
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grab_object( obj );
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entry->obj = obj;
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entry->prev = obj->tail;
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entry->next = NULL;
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if (obj->tail) obj->tail->next = entry;
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else obj->head = entry;
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obj->tail = entry;
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return 1;
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}
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/* remove a thread from an object wait queue */
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void remove_queue( struct object *obj, struct wait_queue_entry *entry )
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{
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if (entry->next) entry->next->prev = entry->prev;
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else obj->tail = entry->prev;
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if (entry->prev) entry->prev->next = entry->next;
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else obj->head = entry->next;
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release_object( obj );
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}
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/* finish waiting */
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static void end_wait( struct thread *thread )
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{
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struct thread_wait *wait = thread->wait;
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struct wait_queue_entry *entry;
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int i;
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assert( wait );
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for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
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entry->obj->ops->remove_queue( entry->obj, entry );
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if (wait->user) remove_timeout_user( wait->user );
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free( wait );
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thread->wait = NULL;
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}
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/* build the thread wait structure */
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static int wait_on( int count, struct object *objects[], int flags, int sec, int usec )
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{
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struct thread_wait *wait;
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struct wait_queue_entry *entry;
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int i;
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if (!(wait = mem_alloc( sizeof(*wait) + (count-1) * sizeof(*entry) ))) return 0;
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current->wait = wait;
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wait->count = count;
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wait->flags = flags;
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wait->user = NULL;
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if (flags & SELECT_TIMEOUT)
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{
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wait->timeout.tv_sec = sec;
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wait->timeout.tv_usec = usec;
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}
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for (i = 0, entry = wait->queues; i < count; i++, entry++)
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{
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struct object *obj = objects[i];
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entry->thread = current;
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if (!obj->ops->add_queue( obj, entry ))
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{
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wait->count = i;
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end_wait( current );
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return 0;
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}
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}
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return 1;
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}
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/* check if the thread waiting condition is satisfied */
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static int check_wait( struct thread *thread )
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{
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int i, signaled;
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struct thread_wait *wait = thread->wait;
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struct wait_queue_entry *entry = wait->queues;
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assert( wait );
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if (wait->flags & SELECT_ALL)
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{
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int not_ok = 0;
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/* Note: we must check them all anyway, as some objects may
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* want to do something when signaled, even if others are not */
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for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
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not_ok |= !entry->obj->ops->signaled( entry->obj, thread );
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if (not_ok) goto other_checks;
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/* Wait satisfied: tell it to all objects */
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signaled = 0;
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for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
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if (entry->obj->ops->satisfied( entry->obj, thread ))
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signaled = STATUS_ABANDONED_WAIT_0;
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return signaled;
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}
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else
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{
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for (i = 0, entry = wait->queues; i < wait->count; i++, entry++)
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{
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if (!entry->obj->ops->signaled( entry->obj, thread )) continue;
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/* Wait satisfied: tell it to the object */
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signaled = i;
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if (entry->obj->ops->satisfied( entry->obj, thread ))
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signaled = i + STATUS_ABANDONED_WAIT_0;
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return signaled;
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}
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}
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other_checks:
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if ((wait->flags & SELECT_INTERRUPTIBLE) && thread->system_apc.head) return STATUS_USER_APC;
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if ((wait->flags & SELECT_ALERTABLE) && thread->user_apc.head) return STATUS_USER_APC;
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if (wait->flags & SELECT_TIMEOUT)
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{
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struct timeval now;
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gettimeofday( &now, NULL );
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if (!time_before( &now, &wait->timeout )) return STATUS_TIMEOUT;
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}
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return -1;
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}
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/* attempt to wake up a thread */
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/* return 1 if OK, 0 if the wait condition is still not satisfied */
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static int wake_thread( struct thread *thread )
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{
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int signaled;
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if ((signaled = check_wait( thread )) == -1) return 0;
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if (debug_level) fprintf( stderr, "%08x: *wakeup* object=%d\n",
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(unsigned int)thread, signaled );
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end_wait( thread );
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send_thread_wakeup( thread, signaled );
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return 1;
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}
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/* thread wait timeout */
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static void thread_timeout( void *ptr )
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{
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struct thread *thread = ptr;
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if (debug_level) fprintf( stderr, "%08x: *timeout*\n", (unsigned int)thread );
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assert( thread->wait );
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thread->wait->user = NULL;
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end_wait( thread );
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send_thread_wakeup( thread, STATUS_TIMEOUT );
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}
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/* select on a list of handles */
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static void select_on( int count, handle_t *handles, int flags, int sec, int usec )
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{
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int ret, i;
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struct object *objects[MAXIMUM_WAIT_OBJECTS];
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assert( !current->wait );
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if ((count < 0) || (count > MAXIMUM_WAIT_OBJECTS))
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{
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set_error( STATUS_INVALID_PARAMETER );
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return;
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}
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for (i = 0; i < count; i++)
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{
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if (!(objects[i] = get_handle_obj( current->process, handles[i], SYNCHRONIZE, NULL )))
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break;
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}
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if (i < count) goto done;
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if (!wait_on( count, objects, flags, sec, usec )) goto done;
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if ((ret = check_wait( current )) != -1)
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{
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/* condition is already satisfied */
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end_wait( current );
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set_error( ret );
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goto done;
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}
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/* now we need to wait */
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if (flags & SELECT_TIMEOUT)
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{
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if (!(current->wait->user = add_timeout_user( ¤t->wait->timeout,
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thread_timeout, current )))
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{
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end_wait( current );
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goto done;
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}
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}
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set_error( STATUS_PENDING );
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done:
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while (--i >= 0) release_object( objects[i] );
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}
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/* attempt to wake threads sleeping on the object wait queue */
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void wake_up( struct object *obj, int max )
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{
|
|
struct wait_queue_entry *entry = obj->head;
|
|
|
|
while (entry)
|
|
{
|
|
struct thread *thread = entry->thread;
|
|
entry = entry->next;
|
|
if (wake_thread( thread ))
|
|
{
|
|
if (max && !--max) break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* queue an async procedure call */
|
|
int thread_queue_apc( struct thread *thread, struct object *owner, void *func,
|
|
enum apc_type type, int system, int nb_args, ... )
|
|
{
|
|
struct thread_apc *apc;
|
|
struct apc_queue *queue = system ? &thread->system_apc : &thread->user_apc;
|
|
|
|
/* cancel a possible previous APC with the same owner */
|
|
if (owner) thread_cancel_apc( thread, owner, system );
|
|
|
|
if (!(apc = mem_alloc( sizeof(*apc) + (nb_args-1)*sizeof(apc->args[0]) ))) return 0;
|
|
apc->prev = queue->tail;
|
|
apc->next = NULL;
|
|
apc->owner = owner;
|
|
apc->func = func;
|
|
apc->type = type;
|
|
apc->nb_args = nb_args;
|
|
if (nb_args)
|
|
{
|
|
int i;
|
|
va_list args;
|
|
va_start( args, nb_args );
|
|
for (i = 0; i < nb_args; i++) apc->args[i] = va_arg( args, void * );
|
|
va_end( args );
|
|
}
|
|
queue->tail = apc;
|
|
if (!apc->prev) /* first one */
|
|
{
|
|
queue->head = apc;
|
|
if (thread->wait) wake_thread( thread );
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* cancel the async procedure call owned by a specific object */
|
|
void thread_cancel_apc( struct thread *thread, struct object *owner, int system )
|
|
{
|
|
struct thread_apc *apc;
|
|
struct apc_queue *queue = system ? &thread->system_apc : &thread->user_apc;
|
|
for (apc = queue->head; apc; apc = apc->next)
|
|
{
|
|
if (apc->owner != owner) continue;
|
|
if (apc->next) apc->next->prev = apc->prev;
|
|
else queue->tail = apc->prev;
|
|
if (apc->prev) apc->prev->next = apc->next;
|
|
else queue->head = apc->next;
|
|
free( apc );
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* remove the head apc from the queue; the returned pointer must be freed by the caller */
|
|
static struct thread_apc *thread_dequeue_apc( struct thread *thread, int system_only )
|
|
{
|
|
struct thread_apc *apc;
|
|
struct apc_queue *queue = &thread->system_apc;
|
|
|
|
if (!queue->head && !system_only) queue = &thread->user_apc;
|
|
if ((apc = queue->head))
|
|
{
|
|
if (apc->next) apc->next->prev = NULL;
|
|
else queue->tail = NULL;
|
|
queue->head = apc->next;
|
|
}
|
|
return apc;
|
|
}
|
|
|
|
/* retrieve an LDT selector entry */
|
|
static void get_selector_entry( struct thread *thread, int entry,
|
|
unsigned int *base, unsigned int *limit,
|
|
unsigned char *flags )
|
|
{
|
|
if (!thread->process->ldt_copy)
|
|
{
|
|
set_error( STATUS_ACCESS_DENIED );
|
|
return;
|
|
}
|
|
if (entry >= 8192)
|
|
{
|
|
set_error( STATUS_INVALID_PARAMETER ); /* FIXME */
|
|
return;
|
|
}
|
|
if (suspend_for_ptrace( thread ))
|
|
{
|
|
unsigned char flags_buf[4];
|
|
int *addr = (int *)thread->process->ldt_copy + entry;
|
|
if (read_thread_int( thread, addr, base ) == -1) goto done;
|
|
if (read_thread_int( thread, addr + 8192, limit ) == -1) goto done;
|
|
addr = (int *)thread->process->ldt_copy + 2*8192 + (entry >> 2);
|
|
if (read_thread_int( thread, addr, (int *)flags_buf ) == -1) goto done;
|
|
*flags = flags_buf[entry & 3];
|
|
done:
|
|
resume_thread( thread );
|
|
}
|
|
}
|
|
|
|
/* kill a thread on the spot */
|
|
void kill_thread( struct thread *thread, int violent_death )
|
|
{
|
|
if (thread->state == TERMINATED) return; /* already killed */
|
|
thread->state = TERMINATED;
|
|
if (current == thread) current = NULL;
|
|
if (debug_level)
|
|
fprintf( stderr,"%08x: *killed* exit_code=%d\n",
|
|
(unsigned int)thread, thread->exit_code );
|
|
if (thread->wait)
|
|
{
|
|
end_wait( thread );
|
|
/* if it is waiting on the socket, we don't need to send a SIGTERM */
|
|
violent_death = 0;
|
|
}
|
|
debug_exit_thread( thread );
|
|
abandon_mutexes( thread );
|
|
remove_process_thread( thread->process, thread );
|
|
wake_up( &thread->obj, 0 );
|
|
detach_thread( thread, violent_death ? SIGTERM : 0 );
|
|
remove_select_user( &thread->obj );
|
|
release_object( thread->request_fd );
|
|
close( thread->reply_fd );
|
|
close( thread->wait_fd );
|
|
munmap( thread->buffer, MAX_REQUEST_LENGTH );
|
|
thread->request_fd = NULL;
|
|
thread->reply_fd = -1;
|
|
thread->wait_fd = -1;
|
|
thread->buffer = (void *)-1;
|
|
release_object( thread );
|
|
}
|
|
|
|
/* take a snapshot of currently running threads */
|
|
struct thread_snapshot *thread_snap( int *count )
|
|
{
|
|
struct thread_snapshot *snapshot, *ptr;
|
|
struct thread *thread;
|
|
int total = 0;
|
|
|
|
for (thread = first_thread; thread; thread = thread->next)
|
|
if (thread->state != TERMINATED) total++;
|
|
if (!total || !(snapshot = mem_alloc( sizeof(*snapshot) * total ))) return NULL;
|
|
ptr = snapshot;
|
|
for (thread = first_thread; thread; thread = thread->next)
|
|
{
|
|
if (thread->state == TERMINATED) continue;
|
|
ptr->thread = thread;
|
|
ptr->count = thread->obj.refcount;
|
|
ptr->priority = thread->priority;
|
|
grab_object( thread );
|
|
ptr++;
|
|
}
|
|
*count = total;
|
|
return snapshot;
|
|
}
|
|
|
|
/* signal that we are finished booting on the client side */
|
|
DECL_HANDLER(boot_done)
|
|
{
|
|
debug_level = max( debug_level, req->debug_level );
|
|
/* Make sure last_req is initialized */
|
|
current->last_req = REQ_BOOT_DONE;
|
|
if (current == booting_thread)
|
|
{
|
|
booting_thread = (struct thread *)~0UL; /* make sure it doesn't match other threads */
|
|
lock_master_socket(0); /* allow other clients now */
|
|
}
|
|
}
|
|
|
|
/* create a new thread */
|
|
DECL_HANDLER(new_thread)
|
|
{
|
|
struct thread *thread;
|
|
int sock[2];
|
|
|
|
if (socketpair( AF_UNIX, SOCK_STREAM, 0, sock ) != -1)
|
|
{
|
|
if ((thread = create_thread( sock[0], current->process )))
|
|
{
|
|
if (req->suspend) thread->suspend++;
|
|
req->tid = thread;
|
|
if ((req->handle = alloc_handle( current->process, thread,
|
|
THREAD_ALL_ACCESS, req->inherit )))
|
|
{
|
|
send_client_fd( current, sock[1], req->handle );
|
|
close( sock[1] );
|
|
/* thread object will be released when the thread gets killed */
|
|
return;
|
|
}
|
|
kill_thread( thread, 1 );
|
|
}
|
|
close( sock[1] );
|
|
}
|
|
else file_set_error();
|
|
}
|
|
|
|
/* retrieve the thread buffer file descriptor */
|
|
DECL_HANDLER(get_thread_buffer)
|
|
{
|
|
fatal_protocol_error( current, "get_thread_buffer: should never get called directly\n" );
|
|
}
|
|
|
|
/* initialize a new thread */
|
|
DECL_HANDLER(init_thread)
|
|
{
|
|
if (current->unix_pid)
|
|
{
|
|
fatal_protocol_error( current, "init_thread: already running\n" );
|
|
return;
|
|
}
|
|
current->unix_pid = req->unix_pid;
|
|
current->teb = req->teb;
|
|
if (current->suspend + current->process->suspend > 0) stop_thread( current );
|
|
if (current->process->running_threads > 1)
|
|
generate_debug_event( current, CREATE_THREAD_DEBUG_EVENT, req->entry );
|
|
}
|
|
|
|
/* terminate a thread */
|
|
DECL_HANDLER(terminate_thread)
|
|
{
|
|
struct thread *thread;
|
|
|
|
req->self = 0;
|
|
req->last = 0;
|
|
if ((thread = get_thread_from_handle( req->handle, THREAD_TERMINATE )))
|
|
{
|
|
thread->exit_code = req->exit_code;
|
|
if (thread != current) kill_thread( thread, 1 );
|
|
else
|
|
{
|
|
req->self = 1;
|
|
req->last = (thread->process->running_threads == 1);
|
|
}
|
|
release_object( thread );
|
|
}
|
|
}
|
|
|
|
/* fetch information about a thread */
|
|
DECL_HANDLER(get_thread_info)
|
|
{
|
|
struct thread *thread;
|
|
handle_t handle = req->handle;
|
|
|
|
if (!handle) thread = get_thread_from_id( req->tid_in );
|
|
else thread = get_thread_from_handle( req->handle, THREAD_QUERY_INFORMATION );
|
|
|
|
if (thread)
|
|
{
|
|
req->tid = get_thread_id( thread );
|
|
req->teb = thread->teb;
|
|
req->exit_code = (thread->state == TERMINATED) ? thread->exit_code : STILL_ACTIVE;
|
|
req->priority = thread->priority;
|
|
release_object( thread );
|
|
}
|
|
}
|
|
|
|
/* set information about a thread */
|
|
DECL_HANDLER(set_thread_info)
|
|
{
|
|
struct thread *thread;
|
|
|
|
if ((thread = get_thread_from_handle( req->handle, THREAD_SET_INFORMATION )))
|
|
{
|
|
set_thread_info( thread, req );
|
|
release_object( thread );
|
|
}
|
|
}
|
|
|
|
/* suspend a thread */
|
|
DECL_HANDLER(suspend_thread)
|
|
{
|
|
struct thread *thread;
|
|
|
|
if ((thread = get_thread_from_handle( req->handle, THREAD_SUSPEND_RESUME )))
|
|
{
|
|
req->count = suspend_thread( thread, 1 );
|
|
release_object( thread );
|
|
}
|
|
}
|
|
|
|
/* resume a thread */
|
|
DECL_HANDLER(resume_thread)
|
|
{
|
|
struct thread *thread;
|
|
|
|
if ((thread = get_thread_from_handle( req->handle, THREAD_SUSPEND_RESUME )))
|
|
{
|
|
req->count = resume_thread( thread );
|
|
release_object( thread );
|
|
}
|
|
}
|
|
|
|
/* select on a handle list */
|
|
DECL_HANDLER(select)
|
|
{
|
|
int count = get_req_data_size(req) / sizeof(int);
|
|
select_on( count, get_req_data(req), req->flags, req->sec, req->usec );
|
|
}
|
|
|
|
/* queue an APC for a thread */
|
|
DECL_HANDLER(queue_apc)
|
|
{
|
|
struct thread *thread;
|
|
if ((thread = get_thread_from_handle( req->handle, THREAD_SET_CONTEXT )))
|
|
{
|
|
thread_queue_apc( thread, NULL, req->func, APC_USER, !req->user, 1, req->param );
|
|
release_object( thread );
|
|
}
|
|
}
|
|
|
|
/* get next APC to call */
|
|
DECL_HANDLER(get_apc)
|
|
{
|
|
struct thread_apc *apc;
|
|
size_t size;
|
|
|
|
for (;;)
|
|
{
|
|
if (!(apc = thread_dequeue_apc( current, !req->alertable )))
|
|
{
|
|
/* no more APCs */
|
|
req->func = NULL;
|
|
req->type = APC_NONE;
|
|
set_req_data_size( req, 0 );
|
|
return;
|
|
}
|
|
/* Optimization: ignore APCs that have a NULL func; they are only used
|
|
* to wake up a thread, but since we got here the thread woke up already.
|
|
*/
|
|
if (apc->func) break;
|
|
free( apc );
|
|
}
|
|
size = apc->nb_args * sizeof(apc->args[0]);
|
|
if (size > get_req_data_size(req)) size = get_req_data_size(req);
|
|
req->func = apc->func;
|
|
req->type = apc->type;
|
|
memcpy( get_req_data(req), apc->args, size );
|
|
set_req_data_size( req, size );
|
|
free( apc );
|
|
}
|
|
|
|
/* fetch a selector entry for a thread */
|
|
DECL_HANDLER(get_selector_entry)
|
|
{
|
|
struct thread *thread;
|
|
if ((thread = get_thread_from_handle( req->handle, THREAD_QUERY_INFORMATION )))
|
|
{
|
|
get_selector_entry( thread, req->entry, &req->base, &req->limit, &req->flags );
|
|
release_object( thread );
|
|
}
|
|
}
|