Cascoda SDK
Cascoda SDK for building software to run with CA-821x transceivers
ca821x-queue.h
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2017, Cascoda
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7  *
8  * 1. Redistributions of source code must retain the above copyright notice,
9  * this list of conditions and the following disclaimer.
10  *
11  * 2. Redistributions in binary form must reproduce the above copyright notice,
12  * this list of conditions and the following disclaimer in the documentation
13  * and/or other materials provided with the distribution.
14  *
15  * 3. Neither the name of the copyright holder nor the names of its contributors
16  * may be used to endorse or promote products derived from this software without
17  * specific prior written permission.
18  *
19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
23  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29  * POSSIBILITY OF SUCH DAMAGE.
30  */
36 #ifndef CA821X_QUEUE_H
37 #define CA821X_QUEUE_H
38 
39 #include <pthread.h>
40 #include <stdint.h>
41 #include <stdlib.h>
42 
44 
52 void add_to_queue(struct buffer_queue *buffer_queue, const uint8_t *buf, size_t len, struct ca821x_dev *pDeviceRef);
53 
59 
69  uint8_t *destBuf,
70  size_t maxlen,
71  struct ca821x_dev **pDeviceRef_out);
72 
78 size_t peek_queue(struct buffer_queue *buffer_queue);
79 
86 size_t wait_on_queue(struct buffer_queue *buffer_queue, time_t timeout_s);
87 
94 ca_error wait_on_queue_empty(struct buffer_queue *buffer_queue, time_t timeout_s);
95 
96 #endif
size_t peek_queue(struct buffer_queue *buffer_queue)
Non-blocking function returning the length of the next buffer on the queue (or 0 if nothing)
Definition: ca821x-queue.c:125
void flush_queue(struct buffer_queue *buffer_queue)
Empty a queue into nothing.
Definition: ca821x-queue.c:75
size_t wait_on_queue(struct buffer_queue *buffer_queue, time_t timeout_s)
Wait on a queue, blocking until there is something available.
Definition: ca821x-queue.c:142
ca_error wait_on_queue_empty(struct buffer_queue *buffer_queue, time_t timeout_s)
Wait on a queue, blocking until it is empty.
Definition: ca821x-queue.c:176
size_t pop_from_queue(struct buffer_queue *buffer_queue, uint8_t *destBuf, size_t maxlen, struct ca821x_dev **pDeviceRef_out)
Pop a buffer off a queue.
Definition: ca821x-queue.c:91
void add_to_queue(struct buffer_queue *buffer_queue, const uint8_t *buf, size_t len, struct ca821x_dev *pDeviceRef)
Add a buffer onto the end of a queue.
Definition: ca821x-queue.c:42
Various types used by the cascoda posix api.
ca_error
Cascoda error type.
Definition: ca821x_error.h:51
Queue struct for singly-linked list of buffer_queue_items.
Definition: ca821x-types.h:183
CA-821x Device reference struct.
Definition: ca821x_api.h:123