1 /*
2 * This file and its contents are supplied under the terms of the
3 * Common Development and Distribution License ("CDDL"), version 1.0.
4 * You may only use this file in accordance with the terms of version
5 * 1.0 of the CDDL.
6 *
7 * A full copy of the text of the CDDL should have accompanied this
8 * source. A copy of the CDDL is also available via the Internet at
9 * http://www.illumos.org/license/CDDL.
10 */
11
12 /*
13 * Copyright 2018 Joyent, Inc.
14 */
15
16 /*
17 * Test: read.requeue
18 * Assertion: A sequence of writes turns into a sequence of events.
19 *
20 * Strategy: 1. Create a pipe
21 * 2. Call mevent_add() to be notified of writes to the pipe. The
22 * callback will signal a cv.
23 * 3. In a loop, write to the pipe then wait on the cv.
24 */
25
26 #include <errno.h>
27 #include <fcntl.h>
28 #include <pthread.h>
29 #include <signal.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <strings.h>
33 #include <unistd.h>
34
35 #include <sys/types.h>
36 #include <sys/stat.h>
37
38 #include "testlib.h"
39 #include "mevent.h"
40
41 static pthread_mutex_t mtx = PTHREAD_MUTEX_INITIALIZER;
42 static pthread_cond_t cv = PTHREAD_COND_INITIALIZER;
43
44 static char *cookie = "Chocolate chip with fudge stripes";
45
46 static void
munch(int fd,enum ev_type ev,void * arg)47 munch(int fd, enum ev_type ev, void *arg)
48 {
49 static int i = 0;
50 char buf[8] = { 0 };
51 ssize_t nbytes;
52
53 ASSERT_INT_EQ(("bad event"), ev, EVF_READ);
54 ASSERT_PTR_EQ(("bad cookie"), arg, cookie);
55
56 if ((nbytes = read(fd, buf, sizeof (buf))) < 0) {
57 ASSERT_INT64_EQ(("bad read: %s", strerror(errno)), nbytes, 1);
58 }
59 VERBOSE(("read %ld bytes '%s'", nbytes, buf));
60
61 ASSERT_INT64_EQ(("wanted a byte of cookie"), nbytes, 1);
62
63 ASSERT_CHAR_EQ(("bad byte %d of cookie", i), buf[0], cookie[i]);
64
65 pthread_mutex_lock(&mtx);
66 pthread_cond_signal(&cv);
67 VERBOSE(("wakeup"));
68 pthread_mutex_unlock(&mtx);
69
70 i++;
71 }
72
73 int
main(int argc,const char * argv[])74 main(int argc, const char *argv[])
75 {
76 int pipefds[2];
77 struct mevent *evp;
78
79 start_test(argv[0], 5);
80 start_event_thread();
81
82 if (pipe(pipefds) != 0) {
83 FAIL_ERRNO("pipe");
84 }
85 if (fcntl(pipefds[0], F_SETFL, O_NONBLOCK) != 0) {
86 FAIL_ERRNO("set pipe nonblocking");
87 }
88
89 evp = mevent_add(pipefds[0], EVF_READ, munch, cookie);
90 ASSERT_PTR_NEQ(("mevent_add"), evp, NULL);
91
92 for (int i = 0; cookie[i] != '\0'; i++) {
93 ssize_t written;
94
95 pthread_mutex_lock(&mtx);
96 written = write(pipefds[1], cookie + i, 1);
97 if (written < 0) {
98 FAIL_ERRNO("bad write");
99 }
100 ASSERT_INT64_EQ(("write byte %d of cookie", i), written, 1);
101
102 /* Wait for it to be read */
103 pthread_cond_wait(&cv, &mtx);
104 pthread_mutex_unlock(&mtx);
105 }
106
107 PASS();
108 }
109