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 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 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