/* * Copyright (c) 2010 Apple Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * 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. * 3. Neither the name of Apple Inc. 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Neither Open Software * Foundation, Inc., Hewlett-Packard Company nor Digital * Equipment Corporation makes any representations about the suitability * of this software for any purpose. * * Copyright (c) 2007, Novell, Inc. All rights reserved. * 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. * 3. Neither the name of Novell Inc. nor the names of its contributors * may be used to endorse or promote products derived from this * this software without specific prior written permission. * * 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 HOLDERS 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. * * @APPLE_LICENSE_HEADER_END@ */ /* ** ** NAME: ** ** dgrq.c ** ** FACILITY: ** ** Remote Procedure Call (RPC) ** ** ABSTRACT: ** ** DG protocol service routines. Handles receive queues. ** ** */ #include <dg.h> #include <dgrq.h> #include <dgpkt.h> /* ========================================================================= */ #define DEFAULT_WAKE_THREAD_QSIZE (6 * 1024) /* ========================================================================= */ /* * R P C _ _ D G _ R E C V Q _ I N I T * * Initialize a receive queue (rpc_dg_recv_q_t). */ PRIVATE void rpc__dg_recvq_init ( rpc_dg_recvq_p_t rq ) { /* * presumably the call is either locked or 'private' at this point * RPC_DG_CALL_LOCK_ASSERT(call); */ rq->head = rq->last_inorder = NULL; /* * high_rcv_frag_size should be set to zero. However, since its * primary use is a detection of the sender's MBF capability, we * start it from rpc_c_dg_initial_max_pkt_size for a little * performance improvement. */ rq->high_rcv_frag_size = RPC_C_DG_INITIAL_MAX_PKT_SIZE; rq->next_fragnum = 0; rq->high_fragnum = -1; rq->high_serial_num = -1; rq->head_fragnum = -1; rq->head_serial_num = -1; rq->wake_thread_qsize = DEFAULT_WAKE_THREAD_QSIZE; rq->max_queue_len = RPC_C_DG_MAX_RECVQ_LEN; #ifdef DEBUG /* * For testing, allow an override via debug switch 10. */ if (RPC_DBG (rpc_es_dbg_dg_rq_qsize, 1)) rq->wake_thread_qsize = ((unsigned32) (rpc_g_dbg_switches[(int) rpc_es_dbg_dg_rq_qsize])) * 1024; #endif rq->queue_len = 0; rq->inorder_len = 0; rq->recving_frags = false; rq->all_pkts_recvd = false; rq->is_way_validated= false; } /* * R P C _ _ D G _ R E C V Q _ F R E E * * Frees data referenced by a receive queue (rpc_dg_recv_q_t). The * receive queue itself is NOT freed, since it's (assumed to be) part * of a larger structure. */ PRIVATE void rpc__dg_recvq_free ( rpc_dg_recvq_p_t rq ) { /* * Presumably the call is either locked or 'private' at this point. * The NULL call handle passed to free_rqe() below, implies that we * are sure that this call is not currently blocked waiting for a * packet. * * RPC_DG_CALL_LOCK_ASSERT(call); */ while (rq->head != NULL) { rpc_dg_recvq_elt_p_t rqe = rq->head; rq->head = rqe->next; rpc__dg_pkt_free_rqe(rqe, NULL); } }