From ac7d5ef06a6d6e8d84abbd1f0b82162725f98326 Mon Sep 17 00:00:00 2001 From: Joel Sherrill Date: Thu, 11 May 1995 17:39:37 +0000 Subject: Initial revision --- c/src/libchip/shmdr/addlq.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 c/src/libchip/shmdr/addlq.c (limited to 'c/src/libchip/shmdr/addlq.c') diff --git a/c/src/libchip/shmdr/addlq.c b/c/src/libchip/shmdr/addlq.c new file mode 100644 index 0000000000..2c2529c834 --- /dev/null +++ b/c/src/libchip/shmdr/addlq.c @@ -0,0 +1,43 @@ +/* void Shm_Locked_queue_Add( lq_cb, ecb ) + * + * This routine adds an envelope control block to a shared memory queue. + * + * Input parameters: + * lq_cb - pointer to a locked queue control block + * ecb - pointer to an envelope control block + * + * Output parameters: NONE + * + * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. + * On-Line Applications Research Corporation (OAR). + * All rights assigned to U.S. Government, 1994. + * + * This material may be reproduced by or for the U.S. Government pursuant + * to the copyright license under the clause at DFARS 252.227-7013. This + * notice must appear in all copies of this file and its derivatives. + * + * $Id$ + */ + +#include +#include "shm.h" + +void Shm_Locked_queue_Add( + Shm_Locked_queue_Control *lq_cb, + Shm_Envelope_control *ecb +) +{ + rtems_unsigned32 index; + + ecb->next = Shm_Locked_queue_End_of_list; + ecb->queue = lq_cb->owner; + index = ecb->index; + + Shm_Lock( lq_cb ); + if ( Shm_Convert(lq_cb->front) != Shm_Locked_queue_End_of_list ) + Shm_Envelopes[ Shm_Convert(lq_cb->rear) ].next = index; + else + lq_cb->front = index; + lq_cb->rear = index; + Shm_Unlock( lq_cb ); +} -- cgit v1.2.3