2 * Copyright (c) 2009, Stathis Kamperis
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34 #include <string.h> /* memset() */
38 #define MQNAME "/t_mq_timedsend24"
60 /* Create a message queue with capacity `1'. */
64 memset(&attr, 0, sizeof(attr));
65 attr.mq_maxmsg = 1; /* Maximum number of messages. */
66 attr.mq_msgsize = 1024; /* Maximum message size. */
69 * We intentionally omit the O_NONBLOCK flag, as we _want_ the queue to
70 * operate on blocking mode.
72 md = mq_open(MQNAME, O_CREAT | O_EXCL | O_WRONLY, 0700, &attr);
73 assert(md != (mqd_t)-1);
75 /* Send a message to fill in the queue. */
76 assert(mq_send(md, "foo", sizeof("foo"), /* priority */ 0) != -1);
79 * Since we are on blocking mode, any invalid `nsec' field in the
80 * timeout structure we provide to mq_timedsend(), shall result in an
83 struct timespec timeout;
86 for (i = 0; i < sizeof(tstable) / sizeof(tstable[0]); i++) {
87 timeout.tv_sec = tstable[i].tv_sec;
88 timeout.tv_nsec = tstable[i].tv_nsec;
90 assert(mq_timedsend(md, "foo", sizeof("foo"), /* priority */ 0,
91 &timeout) == -1 && errno == EINVAL);
94 /* Disassociate from message queue. */
95 assert(mq_close(md) != -1);
97 /* Remove message queue from the system. */
98 assert(mq_unlink(MQNAME) != -1);
102 return (EXIT_SUCCESS);