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server: Take advantage of the fd generic wait queue to remove a lot of serial code.

This commit is contained in:
Alexandre Julliard 2007-04-02 12:49:09 +02:00
parent e92f85474f
commit fd6f83d00a
1 changed files with 7 additions and 87 deletions
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94
server/serial.c
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@ -61,12 +61,9 @@ static struct fd *serial_get_fd( struct object *obj );
static unsigned int serial_map_access( struct object *obj, unsigned int access );
static void serial_destroy(struct object *obj);
static int serial_get_poll_events( struct fd *fd );
static void serial_poll_event( struct fd *fd, int event );
static enum server_fd_type serial_get_info( struct fd *fd, int *flags );
static void serial_flush( struct fd *fd, struct event **event );
static void serial_queue_async( struct fd *fd, const async_data_t *data, int type, int count );
static void serial_cancel_async( struct fd *fd );
struct serial
{
@ -85,10 +82,6 @@ struct serial
struct termios original;
struct list read_q;
struct list write_q;
struct list wait_q;
/* FIXME: add dcb, comm status, handler module, sharing */
};
@ -111,12 +104,12 @@ static const struct object_ops serial_ops =
static const struct fd_ops serial_fd_ops =
{
serial_get_poll_events, /* get_poll_events */
serial_poll_event, /* poll_event */
default_fd_get_poll_events, /* get_poll_events */
default_poll_event, /* poll_event */
serial_flush, /* flush */
serial_get_info, /* get_file_info */
serial_queue_async, /* queue_async */
serial_cancel_async /* cancel_async */
default_fd_cancel_async /* cancel_async */
};
/* check if the given fd is a serial port */
@ -146,9 +139,6 @@ struct object *create_serial( struct fd *fd, unsigned int options )
serial->writemult = 0;
serial->writeconst = 0;
serial->eventmask = 0;
list_init( &serial->read_q );
list_init( &serial->write_q );
list_init( &serial->wait_q );
serial->fd = (struct fd *)grab_object( fd );
set_fd_user( fd, &serial_fd_ops, &serial->obj );
return &serial->obj;
@ -172,11 +162,7 @@ static unsigned int serial_map_access( struct object *obj, unsigned int access )
static void serial_destroy( struct object *obj)
{
struct serial *serial = (struct serial *)obj;
async_terminate_queue( &serial->read_q, STATUS_CANCELLED );
async_terminate_queue( &serial->write_q, STATUS_CANCELLED );
async_terminate_queue( &serial->wait_q, STATUS_CANCELLED );
if (serial->fd) release_object( serial->fd );
release_object( serial->fd );
}
static void serial_dump( struct object *obj, int verbose )
@ -191,21 +177,6 @@ static struct serial *get_serial_obj( struct process *process, obj_handle_t hand
return (struct serial *)get_handle_obj( process, handle, access, &serial_ops );
}
static int serial_get_poll_events( struct fd *fd )
{
struct serial *serial = get_fd_user( fd );
int events = 0;
assert( serial->obj.ops == &serial_ops );
if (!list_empty( &serial->read_q )) events |= POLLIN;
if (!list_empty( &serial->write_q )) events |= POLLOUT;
if (!list_empty( &serial->wait_q )) events |= POLLIN;
/* fprintf(stderr,"poll events are %04x\n",events); */
return events;
}
static enum server_fd_type serial_get_info( struct fd *fd, int *flags )
{
struct serial *serial = get_fd_user( fd );
@ -224,77 +195,26 @@ static enum server_fd_type serial_get_info( struct fd *fd, int *flags )
return FD_TYPE_SERIAL;
}
static void serial_poll_event(struct fd *fd, int event)
{
struct serial *serial = get_fd_user( fd );
/* fprintf(stderr,"Poll event %02x\n",event); */
if (!list_empty( &serial->read_q ) && (POLLIN & event) )
async_terminate_head( &serial->read_q, STATUS_ALERTED );
if (!list_empty( &serial->write_q ) && (POLLOUT & event) )
async_terminate_head( &serial->write_q, STATUS_ALERTED );
if (!list_empty( &serial->wait_q ) && (POLLIN & event) )
async_terminate_head( &serial->wait_q, STATUS_ALERTED );
set_fd_events( fd, serial_get_poll_events(fd) );
}
static void serial_queue_async( struct fd *fd, const async_data_t *data, int type, int count )
{
struct serial *serial = get_fd_user( fd );
struct list *queue;
struct timeval when = current_time;
int timeout;
int events;
int timeout = 0;
assert(serial->obj.ops == &serial_ops);
switch (type)
{
case ASYNC_TYPE_READ:
queue = &serial->read_q;
timeout = serial->readconst + serial->readmult*count;
break;
case ASYNC_TYPE_WAIT:
queue = &serial->wait_q;
timeout = 0;
break;
case ASYNC_TYPE_WRITE:
queue = &serial->write_q;
timeout = serial->writeconst + serial->writemult*count;
break;
default:
set_error(STATUS_INVALID_PARAMETER);
return;
}
add_timeout( &when, timeout );
if (!create_async( current, timeout ? &when : NULL, queue, data )) return;
set_error( STATUS_PENDING );
/* Check if the new pending request can be served immediately */
events = check_fd_events( fd, serial_get_poll_events( fd ) );
if (events)
{
/* serial_poll_event() calls set_select_events() */
serial_poll_event( fd, events );
return;
}
set_fd_events( fd, serial_get_poll_events( fd ) );
}
static void serial_cancel_async( struct fd *fd )
{
struct serial *serial = get_fd_user( fd );
assert(serial->obj.ops == &serial_ops);
async_terminate_queue( &serial->read_q, STATUS_CANCELLED );
async_terminate_queue( &serial->write_q, STATUS_CANCELLED );
async_terminate_queue( &serial->wait_q, STATUS_CANCELLED );
fd_queue_async_timeout( fd, data, type, count, timeout ? &when : NULL );
}
static void serial_flush( struct fd *fd, struct event **event )
@ -347,7 +267,7 @@ DECL_HANDLER(set_serial_info)
serial->eventmask = req->eventmask;
if (!serial->eventmask)
{
async_terminate_queue( &serial->wait_q, STATUS_SUCCESS );
fd_async_terminate_queue( serial->fd, ASYNC_TYPE_WAIT, STATUS_SUCCESS );
}
}