forked from Imagelibrary/rtems
34 lines
861 B
C
34 lines
861 B
C
/* Shm_Get_packet
|
|
*
|
|
* This routine is the shared memory locked queue MPCI driver
|
|
* routine used to obtain an empty message packet.
|
|
*
|
|
* Input parameters:
|
|
* packet - address of pointer to packet
|
|
*
|
|
* Output parameters:
|
|
* *(cpb->get_packet) - address of allocated packet
|
|
*
|
|
* COPYRIGHT (c) 1989-1999.
|
|
* On-Line Applications Research Corporation (OAR).
|
|
*
|
|
* The license and distribution terms for this file may be
|
|
* found in the file LICENSE in this distribution or at
|
|
* http://www.rtems.org/license/LICENSE.
|
|
*/
|
|
|
|
#include <rtems.h>
|
|
#include "shm_driver.h"
|
|
|
|
rtems_mpci_entry Shm_Get_packet(
|
|
rtems_packet_prefix **packet
|
|
)
|
|
{
|
|
Shm_Envelope_control *ecb;
|
|
|
|
ecb = Shm_Allocate_envelope();
|
|
if ( !ecb )
|
|
rtems_fatal_error_occurred ( SHM_NO_FREE_PKTS );
|
|
*packet = Shm_Envelope_control_to_packet_prefix_pointer( ecb );
|
|
}
|