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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-07-22 00:54:03 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-07-22 00:54:03 +0000 |
commit | f0f935fc0d73ffd16130e8430aa313a2aaa626a1 (patch) | |
tree | 459e8175cf67f308b01811492ca3c364ee3a75c2 /nuttx/examples/pipe/pipe_main.c | |
parent | 26e033f670e28e9bf487c17b2454490acc8c4fdf (diff) | |
download | px4-nuttx-f0f935fc0d73ffd16130e8430aa313a2aaa626a1.tar.gz px4-nuttx-f0f935fc0d73ffd16130e8430aa313a2aaa626a1.tar.bz2 px4-nuttx-f0f935fc0d73ffd16130e8430aa313a2aaa626a1.zip |
Pipe test
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@775 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/examples/pipe/pipe_main.c')
-rw-r--r-- | nuttx/examples/pipe/pipe_main.c | 304 |
1 files changed, 304 insertions, 0 deletions
diff --git a/nuttx/examples/pipe/pipe_main.c b/nuttx/examples/pipe/pipe_main.c new file mode 100644 index 000000000..eea6a67a6 --- /dev/null +++ b/nuttx/examples/pipe/pipe_main.c @@ -0,0 +1,304 @@ +/**************************************************************************** + * pipe_main.c + * + * Copyright (C) 2008 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 NuttX 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 <sys/types.h> +#include <sys/stat.h> + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <pthread.h> +#include <string.h> +#include <fcntl.h> +#include <errno.h> + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +#ifndef CONFIG_EXAMPLES_FIFO_PATH +# define CONFIG_EXAMPLES_FIFO_PATH "/tmp/testfifo" +#endif + +#define MAX_BYTE 13 + +#define WRITE_SIZE MAX_BYTE +#define NWRITES 1400 +#define NWRITE_BYTES (NWRITES * WRITE_SIZE) + +#define READ_SIZE (2*MAX_BYTE) +#define NREADS (NWRITES / 2) +#define NREAD_BYTES NWRITE_BYTES + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: reader + ****************************************************************************/ + +static void *reader(pthread_addr_t pvarg) +{ + char buffer[READ_SIZE]; + int fd = (int)pvarg; + int ret; + int nbytes; + int value; + int ndx; + + printf("reader: started\n"); + for (nbytes = 0, value = 0; nbytes < NREAD_BYTES;) + { + ret = read(fd, buffer, READ_SIZE); + if (ret < 0 ) + { + fprintf(stderr, "reader: read failed, errno=%d\n", errno); + return (void*)1; + } + else if (ret == 0) + { +#warning BUG: pipe should return zero when writer closes + fprintf(stderr, "reader: Received zero bytes\n"); + return (void*)2; + } + for (ndx = 0; ndx < ret; ndx++) + { + if (value >= WRITE_SIZE) + { + value = 0; + } + if (buffer[ndx] != value) + { + fprintf(stderr, "reader: Byte %d, expected %d, found %d\n", + nbytes + ndx, value, buffer[ndx]); + return (void*)3; + } + value++; + } + nbytes += ret; + } + printf("reader: %d bytes read\n", nbytes); + return (void*)0; +} + +/**************************************************************************** + * Name: writer + ****************************************************************************/ + +static void *writer(pthread_addr_t pvarg) +{ + char buffer[WRITE_SIZE]; + int fd = (int)pvarg; + int ret; + int i; + + printf("writer: started\n"); + for (i = 0; i < WRITE_SIZE; i++) + { + buffer[i] = i; + } + + for (i = 0; i < NWRITES; i++) + { + ret = write(fd, buffer, WRITE_SIZE); + if (ret < 0 ) + { + fprintf(stderr, "writer: write failed, errno=%d\n", errno); + return (void*)1; + } + else if (ret != WRITE_SIZE) + { + fprintf(stderr, "writer: Unexpected write size=%d\n", ret); + return (void*)2; + } + } + printf("writer: %d bytes written\n", NWRITE_BYTES); + return (void*)0; +} + +/**************************************************************************** + * Name: perform_test + ****************************************************************************/ + +static int perform_test(int fdin, int fdout) +{ + pthread_t readerid; + pthread_t writerid; + void *value; + int tmp; + int ret; + + /* Start reader thread */ + + printf("perform_test: Starting reader thread\n"); + ret = pthread_create(&readerid, NULL, reader, (pthread_addr_t)fdin); + if (ret != 0) + { + fprintf(stderr, "perform_test: Failed to create reader thread, error=%d\n", ret); + return -1; + } + + /* Start writer thread */ + + printf("perform_test: Starting writer thread\n"); + ret = pthread_create(&writerid, NULL, writer, (pthread_addr_t)fdout); + if (ret != 0) + { + fprintf(stderr, "perform_test: Failed to create writer thread, error=%d\n", ret); + ret = pthread_cancel(readerid); + if (ret != 0) + { + fprintf(stderr, "perform_test: Failed to cancel reader thread, error=%d\n", ret); + } + return -1; + } + + /* Wait for writer thread to complete */ + + printf("perform_test: Waiting for writer thread\n"); + ret = pthread_join(writerid, &value); + if (ret != 0) + { + fprintf(stderr, "perform_test: pthread_join failed, error=%d\n", ret); + } + else + { + ret = (int)value; + printf("perform_test: writer returned %d\n", ret); + } + + /* Wait for reader thread to complete */ + + printf("perform_test: Waiting for reader thread\n"); + tmp = pthread_join(readerid, &value); + if (tmp != 0) + { + fprintf(stderr, "perform_test: pthread_join failed, error=%d\n", ret); + } + else + { + tmp = (int)value; + printf("perform_test: reader returned %d\n", tmp); + } + + if (ret == 0) + { + ret = tmp; + } + printf("perform_test: returning %d\n", ret); + return ret; +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: user_initialize + ****************************************************************************/ + +void user_initialize(void) +{ +} + +/**************************************************************************** + * Name: user_start + ****************************************************************************/ + +int user_start(int argc, char *argv[]) +{ + int fdin; + int fdout; + int ret; + + /* Test FIFO logic */ + + printf("user_start: Performing FIFO test\n"); + ret = mkfifo(CONFIG_EXAMPLES_FIFO_PATH, 0666); + if (ret < 0) + { + fprintf(stderr, "user_start: mkfifo failed with errno=%d\n", errno); + return 1; + } + + fdin = open(CONFIG_EXAMPLES_FIFO_PATH, O_RDONLY); + if (fdin < 0) + { + fprintf(stderr, "user_start: Failed to open FIFO %s for reading, errno=%d\n", + CONFIG_EXAMPLES_FIFO_PATH, errno); + return 2; + } + + fdout = open(CONFIG_EXAMPLES_FIFO_PATH, O_WRONLY); + if (fdout < 0) + { + fprintf(stderr, "user_start: Failed to open FIFO %s for writing, errno=%d\n", + CONFIG_EXAMPLES_FIFO_PATH, errno); + close(fdin); + return 3; + } + + ret = perform_test(fdin, fdout); + close(fdin); + close(fdout); + unlink(CONFIG_EXAMPLES_FIFO_PATH); + if (ret != 0) + { + fprintf(stderr, "user_start: FIFO test FAILED\n"); + return 4; + } + printf("user_start: FIFO test PASSED\n"); + + /* Test PIPE logic */ + + printf("user_start: Performing pipe test\n"); + /* Not yet implemented */ + + fflush(stdout); + return 0; +} |