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
|
/* SPDX-License-Identifier: BSD-2-Clause */
/* Shm_Receive_packet
*
* This routine is the shared memory locked queue MPCI driver routine
* used to obtain a packet containing a message from this node's
* receive queue.
*
* Input parameters:
* packet - address of a pointer to a packet
*
* Output parameters:
* *(rpb->packet) - pointer to packet
* NULL if no packet currently available
*
* COPYRIGHT (c) 1989-1999.
* On-Line Applications Research Corporation (OAR).
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <rtems.h>
#include "shm_driver.h"
rtems_mpci_entry Shm_Receive_packet(
rtems_packet_prefix **packet
)
{
Shm_Envelope_control *ecb;
ecb = Shm_Locked_queue_Get( Shm_Local_receive_queue );
if ( ecb ) {
*(packet) = Shm_Envelope_control_to_packet_prefix_pointer( ecb );
if ( ecb->Preamble.endian != Shm_Configuration->format )
Shm_Convert_packet( *packet );
Shm_Receive_message_count++;
} else {
*(packet) = NULL;
Shm_Null_message_count++;
}
}
|