mirror of
git://source.winehq.org/git/wine.git
synced 2024-09-02 08:53:38 +00:00
131 lines
3.9 KiB
C
131 lines
3.9 KiB
C
![]() |
/*
|
||
|
* Server-side message queues
|
||
|
*
|
||
|
* Copyright (C) 2000 Alexandre Julliard
|
||
|
*/
|
||
|
|
||
|
#include <assert.h>
|
||
|
#include <stdio.h>
|
||
|
#include <stdlib.h>
|
||
|
|
||
|
#include "handle.h"
|
||
|
#include "thread.h"
|
||
|
#include "process.h"
|
||
|
#include "request.h"
|
||
|
|
||
|
struct msg_queue
|
||
|
{
|
||
|
struct object obj; /* object header */
|
||
|
struct thread *thread; /* thread owning this queue */
|
||
|
int signaled; /* queue has been signaled */
|
||
|
};
|
||
|
|
||
|
static void msg_queue_dump( struct object *obj, int verbose );
|
||
|
static int msg_queue_add_queue( struct object *obj, struct wait_queue_entry *entry );
|
||
|
static void msg_queue_remove_queue( struct object *obj, struct wait_queue_entry *entry );
|
||
|
static int msg_queue_signaled( struct object *obj, struct thread *thread );
|
||
|
static int msg_queue_satisfied( struct object *obj, struct thread *thread );
|
||
|
|
||
|
static const struct object_ops msg_queue_ops =
|
||
|
{
|
||
|
sizeof(struct msg_queue), /* size */
|
||
|
msg_queue_dump, /* dump */
|
||
|
msg_queue_add_queue, /* add_queue */
|
||
|
msg_queue_remove_queue, /* remove_queue */
|
||
|
msg_queue_signaled, /* signaled */
|
||
|
msg_queue_satisfied, /* satisfied */
|
||
|
NULL, /* get_poll_events */
|
||
|
NULL, /* poll_event */
|
||
|
no_read_fd, /* get_read_fd */
|
||
|
no_write_fd, /* get_write_fd */
|
||
|
no_flush, /* flush */
|
||
|
no_get_file_info, /* get_file_info */
|
||
|
no_destroy /* destroy */
|
||
|
};
|
||
|
|
||
|
|
||
|
static struct msg_queue *create_msg_queue( struct thread *thread )
|
||
|
{
|
||
|
struct msg_queue *queue;
|
||
|
|
||
|
if ((queue = alloc_object( &msg_queue_ops, -1 )))
|
||
|
{
|
||
|
queue->signaled = 0;
|
||
|
queue->thread = thread;
|
||
|
thread->queue = queue;
|
||
|
if (!thread->process->queue)
|
||
|
thread->process->queue = (struct msg_queue *)grab_object( queue );
|
||
|
}
|
||
|
return queue;
|
||
|
}
|
||
|
|
||
|
static int msg_queue_add_queue( struct object *obj, struct wait_queue_entry *entry )
|
||
|
{
|
||
|
struct msg_queue *queue = (struct msg_queue *)obj;
|
||
|
struct process *process = entry->thread->process;
|
||
|
|
||
|
/* if waiting on the main process queue, set the idle event */
|
||
|
if (entry->thread == queue->thread && process->queue == queue)
|
||
|
{
|
||
|
if (process->idle_event) set_event( process->idle_event );
|
||
|
}
|
||
|
add_queue( obj, entry );
|
||
|
return 1;
|
||
|
}
|
||
|
|
||
|
static void msg_queue_remove_queue(struct object *obj, struct wait_queue_entry *entry )
|
||
|
{
|
||
|
struct msg_queue *queue = (struct msg_queue *)obj;
|
||
|
struct process *process = entry->thread->process;
|
||
|
|
||
|
remove_queue( obj, entry );
|
||
|
|
||
|
/* if waiting on the main process queue, reset the idle event */
|
||
|
if (entry->thread == queue->thread && process->queue == queue)
|
||
|
{
|
||
|
if (process->idle_event) reset_event( process->idle_event );
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static void msg_queue_dump( struct object *obj, int verbose )
|
||
|
{
|
||
|
struct msg_queue *queue = (struct msg_queue *)obj;
|
||
|
fprintf( stderr, "Msg queue signaled=%d owner=%p\n", queue->signaled, queue->thread );
|
||
|
}
|
||
|
|
||
|
static int msg_queue_signaled( struct object *obj, struct thread *thread )
|
||
|
{
|
||
|
struct msg_queue *queue = (struct msg_queue *)obj;
|
||
|
return queue->signaled;
|
||
|
}
|
||
|
|
||
|
static int msg_queue_satisfied( struct object *obj, struct thread *thread )
|
||
|
{
|
||
|
struct msg_queue *queue = (struct msg_queue *)obj;
|
||
|
queue->signaled = 0;
|
||
|
return 0; /* Not abandoned */
|
||
|
}
|
||
|
|
||
|
/* get the message queue of the current thread */
|
||
|
DECL_HANDLER(get_msg_queue)
|
||
|
{
|
||
|
struct msg_queue *queue = current->queue;
|
||
|
|
||
|
req->handle = -1;
|
||
|
if (!queue) queue = create_msg_queue( current );
|
||
|
if (queue) req->handle = alloc_handle( current->process, queue, SYNCHRONIZE, 0 );
|
||
|
}
|
||
|
|
||
|
/* wake up a message queue */
|
||
|
DECL_HANDLER(wake_queue)
|
||
|
{
|
||
|
struct msg_queue *queue = (struct msg_queue *)get_handle_obj( current->process, req->handle,
|
||
|
0, &msg_queue_ops );
|
||
|
if (queue)
|
||
|
{
|
||
|
queue->signaled = 1;
|
||
|
wake_up( &queue->obj, 0 );
|
||
|
release_object( queue );
|
||
|
}
|
||
|
}
|