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Test for poll API

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1261 42af7a65-404d-4744-a932-0658087f49c3
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patacongo 2008-11-17 18:36:56 +00:00
parent 8840defcc2
commit efff6fa8d2
4 changed files with 520 additions and 0 deletions
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75
examples/poll/Makefile Normal file
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############################################################################
# examples/poll/Makefile
#
# 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.
#
############################################################################
-include $(TOPDIR)/.config
-include $(TOPDIR)/Make.defs
ASRCS =
AOBJS = $(ASRCS:.S=$(OBJEXT))
CSRCS = poll_main.c poll_listener.c
COBJS = $(CSRCS:.c=$(OBJEXT))
SRCS = $(ASRCS) $(CSRCS)
OBJS = $(AOBJS) $(COBJS)
BIN = lib$(CONFIG_EXAMPLE)$(LIBEXT)
all: $(BIN)
$(AOBJS): %$(OBJEXT): %.S
$(call ASSEMBLE, $<, $@)
$(COBJS): %$(OBJEXT): %.c
$(call COMPILE, $<, $@)
$(BIN): $(OBJS)
@( for obj in $(OBJS) ; do \
$(call ARCHIVE, $@, $${obj}); \
done ; )
.depend: Makefile $(SRCS)
@$(MKDEP) $(CC) -- $(CFLAGS) -- $(SRCS) >Make.dep
@touch $@
depend: .depend
clean:
@rm -f $(BIN) *~ .*.swp
$(call CLEAN)
distclean: clean
@rm -f Make.dep .depend
-include Make.dep

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examples/poll/poll_internal.h Normal file
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/****************************************************************************
* examples/poll/poll.h
*
* 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.
*
****************************************************************************/
#ifndef __EXAMPLES_PIPE_PIPE_H
#define __EXAMPLES_PIPE_PIPE_H
/****************************************************************************
* Compilation Switches
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <pthread.h>
/****************************************************************************
* Definitions
****************************************************************************/
#define FIFO_PATH "/dev/fifo0"
#define LISTENER_DELAY 2000 /* 2 seconds */
#define WRITER_DELAY 4 /* 4 seconds */
#ifdef CONFIG_DISABLE_POLL
# error "The polling API is disabled"
#endif
/* If debug is enabled, then use lib_rawprintf so that OS debug output and
* the test output are synchronized.
*/
#ifdef CONFIG_DEBUG
# define message(...) lib_rawprintf(__VA_ARGS__)
# define msgflush()
#else
# define message(...) printf(__VA_ARGS__)
# define msgflush() fflush(stdout)
#endif
/****************************************************************************
* Public Types
****************************************************************************/
/****************************************************************************
* Public Variables
****************************************************************************/
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
extern void *poll_listener(pthread_addr_t pvarg);
#endif /* __EXAMPLES_PIPE_PIPE_H */

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examples/poll/poll_listener.c Normal file
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/****************************************************************************
* examples/poll/poll_listener.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 <nuttx/config.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h>
#include <poll.h>
#include <fcntl.h>
#include <errno.h>
#include <debug.h>
#include "poll_internal.h"
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: poll_listener
****************************************************************************/
void *poll_listener(pthread_addr_t pvarg)
{
struct pollfd fds;
char buffer[64];
ssize_t nbytes;
boolean timeout;
boolean pollin;
int fd;
int ret;
/* Open the FIFO for non-blocking read */
message("poll_listener: Opening %s for non-blocking read\n", FIFO_PATH);
fd = open(FIFO_PATH, O_RDONLY|O_NONBLOCK);
if (fd < 0)
{
message("poll_listener: ERROR Failed to open FIFO %s: %d\n",
FIFO_PATH, errno);
(void)close(fd);
return (void*)-1;
}
/* Loop forever */
for (;;)
{
message("poll_listener: Calling poll()\n");
memset(&fds, 0, sizeof(struct pollfd));
fds.fd = fd;
fds.events = POLLIN;
fds.revents = 0;
timeout = FALSE;
pollin = FALSE;
ret = poll(&fds, 1, LISTENER_DELAY);
if (ret < 0)
{
message("poll_listener: ERROR poll failed: %d\n");
}
else if (ret == 0)
{
message("poll_listener: Timeout, revents=%02x\n", fds.revents);
timeout = TRUE;
if (fds.revents != 0)
{
message("poll_listener: ERROR? expected revents=00, received revents=%02x\n",
fds.revents);
}
}
else
{
if (ret != 1)
{
message("poll_listener: ERROR poll reported: %d\n");
}
else
{
pollin = TRUE;
}
message("poll_listener: revents=%02x\n", fds.revents);
if (fds.revents != POLLIN)
{
message("poll_listener: ERROR expected revents=%02x, received revents=%02x\n",
fds.revents);
message(" (might just be a race condition)\n");
}
}
/* In any event, read until the pipe is empty */
do
{
nbytes = read(fd, buffer, 63);
if (nbytes <= 0)
{
if (nbytes == 0 || errno == EAGAIN)
{
if (timeout)
{
message("poll_listener: No read data available\n");
}
else if (pollin)
{
message("poll_listener: ERROR no read data\n");
}
}
else if (errno != EINTR)
{
message("poll_listener: read failed: %d\n", errno);
}
nbytes = 0;
}
else
{
if (timeout)
{
message("poll_listener: ERROR? Poll timeout, but data read\n");
message(" (might just be a race condition)\n");
}
buffer[nbytes] = '\0';
message("poll_listener: Read '%s' (%d bytes)\n", buffer, nbytes);
}
timeout = FALSE;
pollin = FALSE;
}
while (nbytes > 0);
/* Make sure that everything is displayed */
msgflush();
}
/* Won't get here */
(void)close(fd);
return NULL;
}

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/****************************************************************************
* examples/poll/poll_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 <nuttx/config.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <pthread.h>
#include <fcntl.h>
#include <poll.h>
#include <errno.h>
#include <debug.h>
#include "poll_internal.h"
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: user_initialize
****************************************************************************/
void user_initialize(void)
{
}
/****************************************************************************
* Name: user_start
****************************************************************************/
int user_start(int argc, char *argv[])
{
char buffer[64];
ssize_t nbytes;
pthread_t tid;
int count;
int fd;
int ret;
/* Test FIFO logic */
message("\nuser_start: Creating FIFO %s\n", FIFO_PATH);
ret = mkfifo(FIFO_PATH, 0666);
if (ret < 0)
{
message("user_start: mkfifo failed: %d\n", errno);
return 1;
}
/* Open the FIFO for blocking, write */
fd = open(FIFO_PATH, O_WRONLY);
if (fd < 0)
{
message("user_start: Failed to open FIFO %s for writing, errno=%d\n",
FIFO_PATH, errno);
return 2;
}
/* Start the listener */
message("user_start: Starting poll_listener thread\n");
ret = pthread_create(&tid, NULL, poll_listener, NULL);
if (ret != 0)
{
message("user_start: Failed to create poll_listener thread: %d\n", ret);
return 3;
}
/* Loop forever */
for (count = 0; ; count++)
{
/* Send a message to the listener... this should wake the listener
* from the poll.
*/
sprintf(buffer, "Message %d", count);
nbytes = write(fd, buffer, strlen(buffer));
if (nbytes < 0)
{
message("user_start: Write failed: %d\n", errno);
return 4;
}
message("user_start: Sent '%s' (%d bytes)\n", buffer, nbytes);
msgflush();
/* Wait awhile. This delay should be long enough that the
* listener will timeout.
*/
sleep(WRITER_DELAY);
}
fflush(stdout);
return 0;
}