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Diffstat (limited to 'nuttx/examples/ostest/mqueue.c')
-rw-r--r-- | nuttx/examples/ostest/mqueue.c | 333 |
1 files changed, 333 insertions, 0 deletions
diff --git a/nuttx/examples/ostest/mqueue.c b/nuttx/examples/ostest/mqueue.c new file mode 100644 index 0000000000..f9e6b6e034 --- /dev/null +++ b/nuttx/examples/ostest/mqueue.c @@ -0,0 +1,333 @@ +/************************************************************************** + * mqueue.c + * + * Copyright (C) 2007 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name Gregory Nutt nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + **************************************************************************/ + +/************************************************************************** + * Included Files + **************************************************************************/ + +#include <stdio.h> +#include <string.h> +#include <pthread.h> +#include <mqueue.h> +#include <sched.h> + +#include "ostest.h" + +/************************************************************************** + * Private Definitions + **************************************************************************/ + +#define TEST_MESSAGE "This is a test and only a test" +#define TEST_MSGLEN (strlen(TEST_MESSAGE)+1) + +/************************************************************************** + * Private Types + **************************************************************************/ + +/************************************************************************** + * Private Function Prototypes + **************************************************************************/ + +/************************************************************************** + * Global Variables + **************************************************************************/ + +/************************************************************************** + * Private Variables + **************************************************************************/ + +/************************************************************************** + * Private Functions + **************************************************************************/ + +/************************************************************************** + * Public Functions + **************************************************************************/ + +static void *sender_thread(void *arg) +{ + mqd_t mqfd; + char msg_buffer[TEST_MSGLEN]; + struct mq_attr attr; + int status = 0; + int nerrors = 0; + int i; + + printf("%s: Starting\n", __FUNCTION__); + + /* Fill in attributes for message queue */ + + attr.mq_maxmsg = 20; + attr.mq_msgsize = TEST_MSGLEN; + attr.mq_flags = 0; + + /* Set the flags for the open of the queue. + * Make it a blocking open on the queue, meaning it will block if + * this process tries to send to the queue and the queue is full. + * + * O_CREAT - the queue will get created if it does not already exist. + * O_WRONLY - we are only planning to write to the queue. + * + * Open the queue, and create it if the receiving process hasn't + * already created it. + */ + + mqfd = mq_open("testmq", O_WRONLY|O_CREAT, 0666, &attr); + if (mqfd < 0) + { + printf("%s: ERROR mq_open failed\n", __FUNCTION__); + pthread_exit((void*)1); + } + + /* Fill in a test message buffer to send */ + + memcpy(msg_buffer, TEST_MESSAGE, TEST_MSGLEN); + + /* Perform the send 10 times */ + + for (i = 0; i < 10; i++) + { + status = mq_send(mqfd, msg_buffer, TEST_MSGLEN, 42); + if (status < 0) + { + printf("%s: ERROR mq_send failure=%d on msg %d\n", __FUNCTION__, status, i); + nerrors++; + } + else + { + printf("%s: mq_send succeeded on msg %d\n", __FUNCTION__, i); + } + } + + /* Close the queue and return success */ + + if (mq_close(mqfd) < 0) + { + printf("%s: ERROR mq_close failed\n", __FUNCTION__); + } + + printf("%s: returning nerrors=%d\n", __FUNCTION__, nerrors); + return (void*)nerrors; +} + +static void *receiver_thread(void *arg) +{ + mqd_t mqfd; + char msg_buffer[TEST_MSGLEN]; + struct mq_attr attr; + int nbytes; + int nerrors = 0; + int i; + + printf("%s: Starting\n", __FUNCTION__); + + /* Fill in attributes for message queue */ + + attr.mq_maxmsg = 20; + attr.mq_msgsize = TEST_MSGLEN; + attr.mq_flags = 0; + + /* Set the flags for the open of the queue. + * Make it a blocking open on the queue, meaning it will block if + * this process tries to* send to the queue and the queue is full. + * + * O_CREAT - the queue will get created if it does not already exist. + * O_RDONLY - we are only planning to write to the queue. + * + * Open the queue, and create it if the sending process hasn't + * already created it. + */ + + mqfd = mq_open("testmq", O_RDONLY|O_CREAT, 0666, &attr); + if (mqfd < 0) + { + printf("%s: ERROR mq_open failed\n", __FUNCTION__); + pthread_exit((void*)1); + } + + /* Perform the receive 10 times */ + + for (i = 0; i < 10; i++) + { + nbytes = mq_receive(mqfd, msg_buffer, TEST_MSGLEN, 0); + if (nbytes < 0) + { + printf("%s: ERROR mq_receive failure on msg %d\n", __FUNCTION__, i); + nerrors++; + } + else if (nbytes != TEST_MSGLEN) + { + printf("%s: mq_receive return bad size %d on msg %d\n", __FUNCTION__, nbytes, i); + nerrors++; + } + else if (memcmp(TEST_MESSAGE, msg_buffer, nbytes) != 0) + { + int j; + + printf("%s: mq_receive returned corrupt message on msg %d\n", __FUNCTION__, i); + printf("%s: i Expected Received\n", __FUNCTION__); + + for (j = 0; j < TEST_MSGLEN-1; j++) + { + printf("%s: %2d %02x (%c) %02x\n", + __FUNCTION__, + j, TEST_MESSAGE[j], TEST_MESSAGE[j], msg_buffer[j] & 0x0ff); + } + printf("%s: %2d 00 %02x\n", + __FUNCTION__, j, msg_buffer[j] & 0xff); + } + else + { + printf("%s: mq_receive succeeded on msg %d\n", __FUNCTION__, i); + } + } + + /* Close the queue and return success */ + + if (mq_close(mqfd) < 0) + { + printf("%s: ERROR mq_close failed\n", __FUNCTION__); + nerrors++; + } + + pthread_exit((void*)nerrors); + + /* Destroy the queue */ + + if (mq_unlink("testmq") < 0) + { + printf("%s: ERROR mq_close failed\n", __FUNCTION__); + nerrors++; + } + + printf("%s: returning nerrors=%d\n", __FUNCTION__, nerrors); + return (void*)nerrors; +} + +void mqueue_test(void) +{ + pthread_t sender; + pthread_t receiver; + void *result; + pthread_attr_t attr; + struct sched_param sparam; + int prio_min; + int prio_max; + int prio_mid; + int status; + + /* Start the sending thread at higher priority */ + + printf("%s: Starting receiver\n", __FUNCTION__); + status = pthread_attr_init(&attr); + if (status != 0) + { + printf("%s: pthread_attr_init failed, status=%d\n", __FUNCTION__, status); + } + + status = pthread_attr_setstacksize(&attr, 16384); + if (status != 0) + { + printf("%s: pthread_attr_setstacksize failed, status=%d\n", __FUNCTION__, status); + } + + prio_min = sched_get_priority_min(SCHED_FIFO); + prio_max = sched_get_priority_max(SCHED_FIFO); + prio_mid = (prio_min + prio_max) / 2; + + sparam.sched_priority = prio_mid; + status = pthread_attr_setschedparam(&attr,&sparam); + if (status != OK) + { + printf("%s: pthread_attr_setschedparam failed, status=%d\n", __FUNCTION__, status); + } + else + { + printf("%s: Set receiver priority to %d\n", __FUNCTION__, sparam.sched_priority); + } + + status = pthread_create(&receiver, &attr, receiver_thread, NULL); + if (status != 0) + { + printf("%s: pthread_create failed, status=%d\n", __FUNCTION__, status); + } + + /* Start the sending thread at lower priority */ + + printf("%s: Starting sender\n", __FUNCTION__); + status = pthread_attr_init(&attr); + if (status != 0) + { + printf("%s: pthread_attr_init failed, status=%d\n", __FUNCTION__, status); + } + + status = pthread_attr_setstacksize(&attr, 16384); + if (status != 0) + { + printf("%s: pthread_attr_setstacksize failed, status=%d\n", __FUNCTION__, status); + } + + sparam.sched_priority = (prio_min + prio_mid) / 2; + status = pthread_attr_setschedparam(&attr,&sparam); + if (status != OK) + { + printf("%s: pthread_attr_setschedparam failed, status=%d\n", __FUNCTION__, status); + } + else + { + printf("%s: Set sender thread priority to %d\n", __FUNCTION__, sparam.sched_priority); + } + + status = pthread_create(&sender, &attr, sender_thread, NULL); + if (status != 0) + { + printf("%s: pthread_create failed, status=%d\n", __FUNCTION__, status); + } + + pthread_join(sender, &result); + if (result != (void*)0) + { + printf("%s: ERROR sender thread exited with %d errors\n", __FUNCTION__, (int)result); + } + + pthread_cancel(receiver); + pthread_join(receiver, &result); + if (result != (void*)0) + { + printf("%s: ERROR receiver thread exited with %d errors\n", __FUNCTION__, (int)result); + } +} + + |