blob: d54de177ca58b39f97146f8eb83c0e565ff960d7 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/*
* NOTE: The structure of the routines is identical to that of POSIX
* Message_queues to leave the option of having unnamed message
* queues at a future date. They are currently not part of the
* POSIX standard but unnamed message_queues are. This is also
* the reason for the apparently unnecessary tracking of
* the process_shared attribute. [In addition to the fact that
* it would be trivial to add pshared to the mq_attr structure
* and have process private message queues.]
*
* This code ignores the O_RDONLY/O_WRONLY/O_RDWR flag at open
* time.
*
* $Id$
*/
#include <stdarg.h>
#include <pthread.h>
#include <limits.h>
#include <errno.h>
#include <fcntl.h>
#include <mqueue.h>
#include <rtems/system.h>
#include <rtems/score/watchdog.h>
#include <rtems/posix/seterr.h>
#include <rtems/posix/mqueue.h>
#include <rtems/posix/time.h>
/*PAGE
*
* _POSIX_Message_queue_Receive_support
*/
/* XXX be careful ... watch the size going through all the layers ... */
ssize_t _POSIX_Message_queue_Receive_support(
mqd_t mqdes,
char *msg_ptr,
size_t msg_len,
unsigned int *msg_prio,
Watchdog_Interval timeout
)
{
register POSIX_Message_queue_Control *the_mq;
Objects_Locations location;
unsigned32 status = 0;
unsigned32 length_out;
CORE_message_queue_Submit_types core_priority;
the_mq = _POSIX_Message_queue_Get( mqdes, &location );
switch ( location ) {
case OBJECTS_ERROR:
set_errno_and_return_minus_one( EINVAL );
case OBJECTS_REMOTE:
_Thread_Dispatch();
return POSIX_MP_NOT_IMPLEMENTED();
set_errno_and_return_minus_one( EINVAL );
case OBJECTS_LOCAL:
if ( (the_mq->oflag & O_ACCMODE) == O_WRONLY ) {
_Thread_Enable_dispatch();
set_errno_and_return_minus_one( EBADF );
}
/* XXX need to define the options argument to this */
length_out = msg_len;
_CORE_message_queue_Seize(
&the_mq->Message_queue,
mqdes,
msg_ptr,
&length_out,
the_mq->blocking,
&core_priority,
timeout
);
*msg_prio = _POSIX_Message_queue_Priority_from_core( core_priority );
/* XXX convert message priority from core to POSIX */
_Thread_Enable_dispatch();
*msg_prio = _Thread_Executing->Wait.count;
if ( !status )
return length_out;
/* XXX --- the return codes gotta be looked at .. fix this */
return _Thread_Executing->Wait.return_code;
}
return POSIX_BOTTOM_REACHED();
}
|
