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git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5153 42af7a65-404d-4744-a932-0658087f49c3
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patacongo
2012-09-17 18:18:44 +00:00
commit 57623d42eb
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apps/examples/pipe/Kconfig
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#
# For a description of the syntax of this configuration file,
# see misc/tools/kconfig-language.txt.
#
config EXAMPLES_PIPE
bool "Pipe example"
default n
---help---
Enable the pipe example
if EXAMPLES_PIPE
endif
apps/examples/pipe/Makefile
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############################################################################
# apps/examples/pipe/Makefile
#
# Copyright (C) 2008, 2010-2011 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# 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.
#
############################################################################
-include $(TOPDIR)/.config
-include $(TOPDIR)/Make.defs
include $(APPDIR)/Make.defs
# Pipe Example
ASRCS =
CSRCS = pipe_main.c transfer_test.c interlock_test.c redirect_test.c
AOBJS = $(ASRCS:.S=$(OBJEXT))
COBJS = $(CSRCS:.c=$(OBJEXT))
SRCS = $(ASRCS) $(CSRCS)
OBJS = $(AOBJS) $(COBJS)
ifeq ($(WINTOOL),y)
BIN = "${shell cygpath -w $(APPDIR)/libapps$(LIBEXT)}"
else
BIN = "$(APPDIR)/libapps$(LIBEXT)"
endif
ROOTDEPPATH = --dep-path .
# Common build
VPATH =
all: .built
.PHONY: clean depend distclean
$(AOBJS): %$(OBJEXT): %.S
$(call ASSEMBLE, $<, $@)
$(COBJS): %$(OBJEXT): %.c
$(call COMPILE, $<, $@)
.built: $(OBJS)
@( for obj in $(OBJS) ; do \
$(call ARCHIVE, $(BIN), $${obj}); \
done ; )
@touch .built
context:
.depend: Makefile $(SRCS)
@$(MKDEP) $(ROOTDEPPATH) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
@touch $@
depend: .depend
clean:
@rm -f *.o *~ .*.swp .built
$(call CLEAN)
distclean: clean
@rm -f Make.dep .depend
-include Make.dep
apps/examples/pipe/interlock_test.c
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/****************************************************************************
* examples/pipe/interlock_test.c
*
* Copyright (C) 2008 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 <nuttx/config.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include "pipe.h"
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: null_writer
****************************************************************************/
static void *null_writer(pthread_addr_t pvarg)
{
int fd;
/* Wait a bit */
printf("null_writer: started -- sleeping\n");
sleep(5);
/* Then open the FIFO for write access */
printf("null_writer: Opening FIFO for write access\n");
fd = open(FIFO_PATH2, O_WRONLY);
if (fd < 0)
{
fprintf(stderr, "null_writer: Failed to open FIFO %s for writing, errno=%d\n",
FIFO_PATH2, errno);
return (void*)1;
}
/* Wait a bit more */
printf("null_writer: Opened %s for writing -- sleeping\n", FIFO_PATH2);
sleep(5);
/* Then close the FIFO */
printf("null_writer: Closing %s\n", FIFO_PATH2);
if (close(fd) != 0)
{
fprintf(stderr, "null_writer: close failed: %d\n", errno);
}
sleep(5);
printf("null_writer: Returning success\n");
return (void*)0;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: interlock_test
****************************************************************************/
int interlock_test(void)
{
pthread_t writerid;
void *value;
char data[16];
ssize_t nbytes;
int fd;
int ret;
/* Create a FIFO */
ret = mkfifo(FIFO_PATH2, 0666);
if (ret < 0)
{
fprintf(stderr, "interlock_test: mkfifo failed with errno=%d\n", errno);
return 1;
}
/* Start the null_writer_thread */
printf("interlock_test: Starting null_writer thread\n");
ret = pthread_create(&writerid, NULL, null_writer, (pthread_addr_t)NULL);
if (ret != 0)
{
fprintf(stderr, "interlock_test: Failed to create null_writer thread, error=%d\n", ret);
ret = 2;
goto errout_with_fifo;
}
/* Open one end of the FIFO for reading. This open call should block until the
* null_writer thread opens the other end of the FIFO for writing.
*/
printf("interlock_test: Opening FIFO for read access\n");
fd = open(FIFO_PATH2, O_RDONLY);
if (fd < 0)
{
fprintf(stderr, "interlock_test: Failed to open FIFO %s for reading, errno=%d\n",
FIFO_PATH2, errno);
ret = 3;
goto errout_with_thread;
}
/* Attempt to read one byte from the FIFO. This should return end-of-file because
* the null_writer closes the FIFO without writing anything.
*/
printf("interlock_test: Reading from %s\n", FIFO_PATH2);
nbytes = read(fd, data, 16);
if (nbytes < 0 )
{
fprintf(stderr, "interlock_test: read failed, errno=%d\n", errno);
ret = 4;
goto errout_with_file;
}
else if (ret != 0)
{
fprintf(stderr, "interlock_test: Read %d bytes of data -- aborting: %d\n", nbytes);
ret = 5;
goto errout_with_file;
}
/* Close the file */
printf("interlock_test: Closing %s\n", FIFO_PATH2);
if (close(fd) != 0)
{
fprintf(stderr, "interlock_test: close failed: %d\n", errno);
}
/* Wait for null_writer thread to complete */
printf("interlock_test: Waiting for null_writer thread\n");
ret = pthread_join(writerid, &value);
if (ret != 0)
{
fprintf(stderr, "interlock_test: pthread_join failed, error=%d\n", ret);
ret = 6;
goto errout_with_fifo;
}
else
{
printf("interlock_test: writer returned %d\n", (int)value);
if (value != (void*)0)
{
ret = 7;
goto errout_with_fifo;
}
}
/* unlink(FIFO_PATH2); */
printf("interlock_test: Returning success\n");
return 0;
errout_with_file:
if (close(fd) != 0)
{
fprintf(stderr, "interlock_test: close failed: %d\n", errno);
}
errout_with_thread:
pthread_detach(writerid);
pthread_cancel(writerid);
errout_with_fifo:
/* unlink(FIFO_PATH2); */
printf("interlock_test: Returning %d\n", ret);
return ret;
}
apps/examples/pipe/pipe.h
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/****************************************************************************
* examples/pipe/pipe.h
*
* Copyright (C) 2008 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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.
*
****************************************************************************/
#ifndef __EXAMPLES_PIPE_PIPE_H
#define __EXAMPLES_PIPE_PIPE_H
/****************************************************************************
* Compilation Switches
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
/****************************************************************************
* Definitions
****************************************************************************/
#define FIFO_PATH1 "/tmp/testfifo-1"
#define FIFO_PATH2 "/tmp/testfifo-2"
#ifndef CONFIG_EXAMPLES_PIPE_STACKSIZE
# define CONFIG_EXAMPLES_PIPE_STACKSIZE 1024
#endif
/****************************************************************************
* Public Types
****************************************************************************/
/****************************************************************************
* Public Variables
****************************************************************************/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
extern int transfer_test(int fdin, int fdout);
extern int interlock_test(void);
extern int redirection_test(void);
#endif /* __EXAMPLES_PIPE_PIPE_H */
apps/examples/pipe/pipe_main.c
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/****************************************************************************
* examples/pipe/pipe_main.c
*
* Copyright (C) 2008-2009, 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 <nuttx/config.h>
#include <sys/stat.h>
#include <stdio.h>
#include <unistd.h>
#include <sched.h>
#include <fcntl.h>
#include <errno.h>
#include "pipe.h"
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: pipe_main
****************************************************************************/
int pipe_main(int argc, char *argv[])
{
int filedes[2];
int ret;
/* Test FIFO logic */
printf("\npipe_main: Performing FIFO test\n");
ret = mkfifo(FIFO_PATH1, 0666);
if (ret < 0)
{
fprintf(stderr, "pipe_main: mkfifo failed with errno=%d\n", errno);
return 1;
}
/* Open one end of the FIFO for reading and the other end for writing. NOTE:
* the following might not work on most FIFO implementations because the attempt
* to open just one end of the FIFO for writing might block. The NuttX FIFOs block
* only on open for read-only (see interlock_test()).
*/
filedes[1] = open(FIFO_PATH1, O_WRONLY);
if (filedes[1] < 0)
{
fprintf(stderr, "pipe_main: Failed to open FIFO %s for writing, errno=%d\n",
FIFO_PATH1, errno);
return 2;
}
filedes[0] = open(FIFO_PATH1, O_RDONLY);
if (filedes[0] < 0)
{
fprintf(stderr, "pipe_main: Failed to open FIFO %s for reading, errno=%d\n",
FIFO_PATH1, errno);
if (close(filedes[1]) != 0)
{
fprintf(stderr, "pipe_main: close failed: %d\n", errno);
}
return 3;
}
/* Then perform the test using those file descriptors */
ret = transfer_test(filedes[0], filedes[1]);
if (close(filedes[0]) != 0)
{
fprintf(stderr, "pipe_main: close failed: %d\n", errno);
}
if (close(filedes[1]) != 0)
{
fprintf(stderr, "pipe_main: close failed: %d\n", errno);
}
/* unlink(FIFO_PATH1); fails */
if (ret != 0)
{
fprintf(stderr, "pipe_main: FIFO test FAILED (%d)\n", ret);
return 4;
}
printf("pipe_main: FIFO test PASSED\n");
/* Test PIPE logic */
printf("\npipe_main: Performing pipe test\n");
ret = pipe(filedes);
if (ret < 0)
{
fprintf(stderr, "pipe_main: pipe failed with errno=%d\n", errno);
return 5;
}
/* Then perform the test using those file descriptors */
ret = transfer_test(filedes[0], filedes[1]);
if (close(filedes[0]) != 0)
{
fprintf(stderr, "pipe_main: close failed: %d\n", errno);
}
if (close(filedes[1]) != 0)
{
fprintf(stderr, "pipe_main: close failed: %d\n", errno);
}
if (ret != 0)
{
fprintf(stderr, "pipe_main: PIPE test FAILED (%d)\n", ret);
return 6;
}
printf("pipe_main: PIPE test PASSED\n");
/* Perform the FIFO interlock test */
printf("\npipe_main: Performing pipe interlock test\n");
ret = interlock_test();
if (ret != 0)
{
fprintf(stderr, "pipe_main: FIFO interlock test FAILED (%d)\n", ret);
return 7;
}
printf("pipe_main: PIPE interlock test PASSED\n");
/* Perform the pipe redirection test */
printf("\npipe_main: Performing redirection test\n");
ret = redirection_test();
if (ret != 0)
{
fprintf(stderr, "pipe_main: FIFO redirection test FAILED (%d)\n", ret);
return 7;
}
printf("pipe_main: PIPE redirection test PASSED\n");
fflush(stdout);
return 0;
}
apps/examples/pipe/redirect_test.c
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/****************************************************************************
* examples/pipe/redirect_test.c
*
* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 <nuttx/config.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sched.h>
#include <semaphore.h>
#include <errno.h>
#include "pipe.h"
/****************************************************************************
* Definitions
****************************************************************************/
#define READ_SIZE 37
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
static sem_t g_rddone;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: redirect_reader
****************************************************************************/
static int redirect_reader(int argc, char *argv[])
{
char buffer[READ_SIZE];
int fdin;
int fdout;
int ret;
int nbytes = 0;
printf("redirect_reader: started with fdin=%s\n", argv[1]);
/* Convert the fdin to binary */
fdin = atoi(argv[1]);
fdout = atoi(argv[2]);
/* Close fdout -- we don't need it */
ret = close(fdout);
if (ret != 0)
{
fprintf(stderr, "redirect_reader: failed to close fdout=%d\n", fdout);
return 1;
}
/* Re-direct the fdin to stdin */
ret = dup2(fdin, 0);
if (ret != 0)
{
fprintf(stderr, "redirect_reader: dup2 failed: %d\n", errno);
close(fdin);
return 2;
}
/* Close the original file descriptor */
ret = close(fdin);
if (ret != 0)
{
fprintf(stderr, "redirect_reader: failed to close fdin=%d\n", fdin);
return 3;
}
/* Then read from stdin until we hit the end of file */
fflush(stdout);
for (;;)
{
/* Read from stdin */
ret = read(0, buffer, READ_SIZE);
if (ret < 0 )
{
fprintf(stderr, "redirect_reader: read failed, errno=%d\n", errno);
return 4;
}
else if (ret == 0)
{
break;
}
nbytes += ret;
/* Echo to stdout */
ret = write(1, buffer, ret);
if (ret < 0)
{
fprintf(stderr, "redirect_reader: read failed, errno=%d\n", errno);
return 5;
}
}
printf("redirect_reader: %d bytes read\n", nbytes);
ret = close(0);
if (ret != 0)
{
fprintf(stderr, "redirect_reader: failed to close fd=0\n");
return 6;
}
sem_post(&g_rddone);
printf("redirect_reader: Returning success\n");
return 0;
}
/****************************************************************************
* Name: redirect_writer
****************************************************************************/
static int redirect_writer(int argc, char *argv[])
{
int fdin;
int fdout;
int nbytes = 0;
int ret;
fprintf(stderr, "redirect_writer: started with fdout=%s\n", argv[2]);
/* Convert the fdout to binary */
fdin = atoi(argv[1]);
fdout = atoi(argv[2]);
/* Close fdin -- we don't need it */
ret = close(fdin);
if (ret != 0)
{
fprintf(stderr, "redirect_reader: failed to close fdin=%d\n", fdin);
return 1;
}
/* Re-direct the fdout to stdout */
ret = dup2(fdout, 1);
if (ret != 0)
{
fprintf(stderr, "redirect_writer: dup2 failed: %d\n", errno);
return 2;
}
/* Close the original file descriptor */
ret = close(fdout);
if (ret != 0)
{
fprintf(stderr, "redirect_reader: failed to close fdout=%d\n", fdout);
return 3;
}
/* Then write a bunch of stuff to stdout */
fflush(stderr);
nbytes += printf("\nFour score and seven years ago our fathers brought forth on this continent a new nation,\n");
nbytes += printf("conceived in Liberty, and dedicated to the proposition that all men are created equal.\n");
nbytes += printf("\nNow we are engaged in a great civil war, testing whether that nation, or any nation, so\n");
nbytes += printf("conceived and so dedicated, can long endure. We are met on a great battle-field of that war.\n");
nbytes += printf("We have come to dedicate a portion of that field, as a final resting place for those who here\n");
nbytes += printf("gave their lives that that nation might live. It is altogether fitting and proper that we\n");
nbytes += printf("should do this.\n");
nbytes += printf("\nBut, in a larger sense, we can not dedicate - we can not consecrate - we can not hallow - this ground.\n");
nbytes += printf("The brave men, living and dead, who struggled here, have consecrated it, far above our poor power\n");
nbytes += printf("to add or detract. The world will little note, nor long remember what we say here, but it can\n");
nbytes += printf("never forget what they did here. It is for us the living, rather, to be dedicated here to the\n");
nbytes += printf("unfinished work which they who fought here have thus far so nobly advanced. It is rather for us to\n");
nbytes += printf("be here dedicated to the great task remaining before us - that from these honored dead we take\n");
nbytes += printf("increased devotion to that cause for which they gave the last full measure of devotion - that we\n");
nbytes += printf("here highly resolve that these dead shall not have died in vain - that this nation, under God,\n");
nbytes += printf("shall have a new birth of freedom - and that government of the people, by the people, for the\n");
nbytes += printf("people, shall not perish from the earth.\n\n");
fflush(stdout);
fprintf(stderr, "redirect_writer: %d bytes written\n", nbytes);
ret = close(1);
if (ret != 0)
{
fprintf(stderr, "redirect_writer: failed to close fd=1\n");
return 4;
}
fprintf(stderr, "redirect_writer: Returning success\n");
return 0;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: redirection_test
****************************************************************************/
int redirection_test(void)
{
const char *argv[3];
char buffer1[8];
char buffer2[8];
int readerid;
int writerid;
int filedes[2];
int ret;
sem_init(&g_rddone, 0, 0);
/* Create the pipe */
ret = pipe(filedes);
if (ret < 0)
{
fprintf(stderr, "redirection_test: pipe failed with errno=%d\n", errno);
return 5;
}
sprintf(buffer1, "%d", filedes[0]);
argv[0] = buffer1;
sprintf(buffer2, "%d", filedes[1]);
argv[1] = buffer2;
argv[2] = NULL;
/* Start redirect_reader thread */
printf("redirection_test: Starting redirect_reader task with fd=%d\n", filedes[0]);
readerid = task_create("redirect_reader", 50, CONFIG_EXAMPLES_PIPE_STACKSIZE, redirect_reader, argv);
if (readerid < 0)
{
fprintf(stderr, "redirection_test: Failed to create redirect_writer task: %d\n", errno);
return 1;
}
/* Start redirect_writer task */
printf("redirection_test: Starting redirect_writer task with fd=%d\n", filedes[1]);
writerid = task_create("redirect_writer", 50, CONFIG_EXAMPLES_PIPE_STACKSIZE, redirect_writer, argv);
if (writerid < 0)
{
fprintf(stderr, "redirection_test: Failed to create redirect_writer task: %d\n", errno);
ret = task_delete(readerid);
if (ret != 0)
{
fprintf(stderr, "redirection_test: Failed to delete redirect_reader task %d\n", errno);
}
return 2;
}
/* We should be able to close the pipe file descriptors now. */
if (close(filedes[0]) != 0)
{
fprintf(stderr, "pipe_main: close failed: %d\n", errno);
}
if (close(filedes[1]) != 0)
{
fprintf(stderr, "pipe_main: close failed: %d\n", errno);
}
if (ret != 0)
{
fprintf(stderr, "pipe_main: PIPE test FAILED (%d)\n", ret);
return 6;
}
/* Wait for redirect_writer thread to complete */
printf("redirection_test: Waiting...\n");
fflush(stdout);
sem_wait(&g_rddone);
printf("redirection_test: returning %d\n", ret);
return ret;
}
apps/examples/pipe/transfer_test.c
+242
View File
@@ -0,0 +1,242 @@
/****************************************************************************
* examples/pipe/transfer_test.c
*
* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 <nuttx/config.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include "pipe.h"
/****************************************************************************
* Pre-proecessor Definitions
****************************************************************************/
#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: transfer_reader
****************************************************************************/
static void *transfer_reader(pthread_addr_t pvarg)
{
char buffer[READ_SIZE];
int fd = (int)pvarg;
int ret;
int nbytes;
int value;
int ndx;
printf("transfer_reader: started\n");
for (nbytes = 0, value = 0; nbytes < NREAD_BYTES;)
{
ret = read(fd, buffer, READ_SIZE);
if (ret < 0 )
{
fprintf(stderr, "transfer_reader: read failed, errno=%d\n", errno);
return (void*)1;
}
else if (ret == 0)
{
if (nbytes < NREAD_BYTES)
{
fprintf(stderr, "transfer_reader: Too few bytes read -- aborting: %d\n", nbytes);
return (void*)2;
}
break;
}
for (ndx = 0; ndx < ret; ndx++)
{
if (value >= WRITE_SIZE)
{
value = 0;
}
if (buffer[ndx] != value)
{
fprintf(stderr, "transfer_reader: Byte %d, expected %d, found %d\n",
nbytes + ndx, value, buffer[ndx]);
return (void*)3;
}
value++;
}
nbytes += ret;
if (nbytes > NREAD_BYTES)
{
fprintf(stderr, "transfer_reader: Too many bytes read -- aborting: %d\n", nbytes);
return (void*)4;
}
}
printf("transfer_reader: %d bytes read\n", nbytes);
return (void*)0;
}
/****************************************************************************
* Name: transfer_writer
****************************************************************************/
static void *transfer_writer(pthread_addr_t pvarg)
{
char buffer[WRITE_SIZE];
int fd = (int)pvarg;
int ret;
int i;
printf("transfer_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, "transfer_writer: write failed, errno=%d\n", errno);
return (void*)1;
}
else if (ret != WRITE_SIZE)
{
fprintf(stderr, "transfer_writer: Unexpected write size=%d\n", ret);
return (void*)2;
}
}
printf("transfer_writer: %d bytes written\n", NWRITE_BYTES);
return (void*)0;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: transfer_test
****************************************************************************/
int transfer_test(int fdin, int fdout)
{
pthread_t readerid;
pthread_t writerid;
void *value;
int tmp;
int ret;
/* Start transfer_reader thread */
printf("transfer_test: Starting transfer_reader thread\n");
ret = pthread_create(&readerid, NULL, transfer_reader, (pthread_addr_t)fdin);
if (ret != 0)
{
fprintf(stderr, "transfer_test: Failed to create transfer_reader thread, error=%d\n", ret);
return 1;
}
/* Start transfer_writer thread */
printf("transfer_test: Starting transfer_writer thread\n");
ret = pthread_create(&writerid, NULL, transfer_writer, (pthread_addr_t)fdout);
if (ret != 0)
{
fprintf(stderr, "transfer_test: Failed to create transfer_writer thread, error=%d\n", ret);
pthread_detach(readerid);
ret = pthread_cancel(readerid);
if (ret != 0)
{
fprintf(stderr, "transfer_test: Failed to cancel transfer_reader thread, error=%d\n", ret);
}
return 2;
}
/* Wait for transfer_writer thread to complete */
printf("transfer_test: Waiting for transfer_writer thread\n");
ret = pthread_join(writerid, &value);
if (ret != 0)
{
fprintf(stderr, "transfer_test: pthread_join failed, error=%d\n", ret);
}
else
{
ret = (int)value;
printf("transfer_test: transfer_writer returned %d\n", ret);
}
/* Wait for transfer_reader thread to complete */
printf("transfer_test: Waiting for transfer_reader thread\n");
tmp = pthread_join(readerid, &value);
if (tmp != 0)
{
fprintf(stderr, "transfer_test: pthread_join failed, error=%d\n", ret);
}
else
{
tmp = (int)value;
printf("transfer_test: transfer_reader returned %d\n", tmp);
}
if (ret == 0)
{
ret = tmp;
}
printf("transfer_test: returning %d\n", ret);
return ret;
}