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 #include <linux/types.h> 38 #include <linux/semaphore.h> 39 #include <linux/mutex.h> 40 #include <linux/bitops.h> 41 #include <linux/kthread.h> 42 #include <linux/wait.h> 43 #include <linux/vmalloc.h> 44 #include <linux/jiffies.h> 45 #include <linux/delay.h> 46 #include <linux/string.h> 47 #include <linux/interrupt.h> 48 #include <linux/random.h> 49 #include <linux/sched/signal.h> 50 #include <linux/ctype.h> 51 #include <linux/uaccess.h> 52 #include <linux/time.h> /* for time_t */ 53 #include <linux/slab.h> 54 55 #include "vchiq_if.h" 56 57 typedef struct { 58 int size; 59 int read; 60 int write; 61 int initialized; 62 63 struct semaphore pop; 64 struct semaphore push; 65 66 VCHIQ_HEADER_T **storage; 67 } VCHIU_QUEUE_T; 68 69 extern int vchiu_queue_init(VCHIU_QUEUE_T *queue, int size); 70 extern void vchiu_queue_delete(VCHIU_QUEUE_T *queue); 71 72 extern int vchiu_queue_is_empty(VCHIU_QUEUE_T *queue); 73 extern int vchiu_queue_is_full(VCHIU_QUEUE_T *queue); 74 75 extern void vchiu_queue_push(VCHIU_QUEUE_T *queue, VCHIQ_HEADER_T *header); 76 77 extern VCHIQ_HEADER_T *vchiu_queue_peek(VCHIU_QUEUE_T *queue); 78 extern VCHIQ_HEADER_T *vchiu_queue_pop(VCHIU_QUEUE_T *queue); 79 80 #endif 81
