Initial import of t_shmat.
[pcca-tests.git] / mqueue.h / t_mq_timedsend_timeout.c
CommitLineData
2aa45b0f 1/*
2 * Copyright (c) 2009, Stathis Kamperis
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
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
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 *
14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
15 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
16 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
17 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
18 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
20 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
22 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
24 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
83311dec 28#define _XOPEN_SOURCE 600
29
30#include <assert.h>
31#include <errno.h>
32#include <mqueue.h>
33#include <stdio.h>
34#include <stdlib.h>
35#include <string.h> /* memset() */
36#include <time.h>
37#include <sys/time.h>
38
39#define MQNAME "/t_mq_timedsend"
40
41int main(void)
42{
2aa45b0f 43 /*
83311dec 44 * We need a full message queue for mq_timedsend() to block on it and
45 * time out. For this purpose, we start with a queue of capacity equal
46 * to one `1', that can be easily filled in.
2aa45b0f 47 */
83311dec 48 struct mq_attr attr;
49
2aa45b0f 50 memset(&attr, 0, sizeof(attr));
51 attr.mq_maxmsg = 1; /* Maximum number of messages. */
52 attr.mq_msgsize = 1024; /* Maximum message size. */
83311dec 53
54 /* Create the queue. */
55 mqd_t md;
56
2aa45b0f 57 md = mq_open(MQNAME, O_CREAT | O_EXCL | O_WRONLY, 0700, &attr);
58 assert(md != (mqd_t)-1);
83311dec 59
2aa45b0f 60 /*
83311dec 61 * Send a message to exhaust the capacity of the queue. Since noone is
62 * receiveing the message, the queue will remain filled, which is what
63 * we want.
64 */
2aa45b0f 65 assert(mq_send(md, "foo", sizeof("foo"), /* priority */ 0) != -1);
83311dec 66
2aa45b0f 67 /* Timeout in 3 seconds, if the queue doesn't become empty (it wont). */
83311dec 68 struct timespec now, timeout;
69
70 assert(clock_gettime(CLOCK_REALTIME, &now) == 0);
2aa45b0f 71 timeout.tv_sec = now.tv_sec + 3;
72 timeout.tv_nsec = now.tv_nsec;
83311dec 73
74 /*
75 * Since we don't trust mq_timedsend(), we are going to manually measure
76 * the time ellapsed until the function call times out.
77 */
78 struct timeval tv1, tv2;
79
80 assert(gettimeofday(&tv1, NULL) == 0);
81
82 /* This should timeout in ~3 seconds. */
2aa45b0f 83 assert(mq_timedsend(md, "foo", sizeof("foo"), /* priority */ 0,
84 &timeout) == -1 && errno == ETIMEDOUT);
83311dec 85
86 /* Mark the end. */
87 assert(gettimeofday(&tv2, NULL) == 0);
88
21d4cdad 89 /* Make sure the time ellapsed is roughly 3sec. */
90 long int msec;
91
92 msec = (tv2.tv_sec - tv1.tv_sec) * 1000 +
93 (tv2.tv_usec - tv1.tv_usec) / 1000;
94 assert(msec >= 2900 && msec <= 3100);
83311dec 95
96 /* Cleanup. */
97 assert(mq_close(md) != -1);
98 assert(mq_unlink(MQNAME) != -1);
99
62df3fe2
SK
100 printf("passed\n");
101
83311dec 102 return (EXIT_SUCCESS);
103}