1 /** 2 * Copyright (c) 2010-2012 Broadcom. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions, and the following disclaimer, 9 * without modification. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. The names of the above-listed copyright holders may not be used 14 * to endorse or promote products derived from this software without 15 * specific prior written permission. 16 * 17 * ALTERNATIVELY, this software may be distributed under the terms of the 18 * GNU General Public License ("GPL") version 2, as published by the Free 19 * Software Foundation. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 22 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 23 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 25 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 28 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #ifndef VCHIQ_UTIL_H 35 #define VCHIQ_UTIL_H 36 37 #ifdef __FreeBSD__ 38 #include <interface/compat/vchi_bsd.h> 39 #endif 40 41 #include "vchiq_if.h" 42 43 typedef struct { 44 int size; 45 int read; 46 int write; 47 int initialized; 48 49 struct semaphore pop; 50 struct semaphore push; 51 52 VCHIQ_HEADER_T **storage; 53 } VCHIU_QUEUE_T; 54 55 extern int vchiu_queue_init(VCHIU_QUEUE_T *queue, int size); 56 extern void vchiu_queue_delete(VCHIU_QUEUE_T *queue); 57 58 extern int vchiu_queue_is_empty(VCHIU_QUEUE_T *queue); 59 extern int vchiu_queue_is_full(VCHIU_QUEUE_T *queue); 60 61 extern void vchiu_queue_push(VCHIU_QUEUE_T *queue, VCHIQ_HEADER_T *header); 62 63 extern VCHIQ_HEADER_T *vchiu_queue_peek(VCHIU_QUEUE_T *queue); 64 extern VCHIQ_HEADER_T *vchiu_queue_pop(VCHIU_QUEUE_T *queue); 65 66 #endif 67