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examples/buttons: fix strange code in buttons_main

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Signed-off-by: Petro Karashchenko <petro.karashchenko@gmail.com>
This commit is contained in:
Petro Karashchenko 2022-02-15 13:20:02 +02:00 committed by Xiang Xiao
parent 020503576c
commit 9a85c405f5
1 changed files with 32 additions and 46 deletions
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78
examples/buttons/buttons_main.c
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@ -143,7 +143,7 @@ static bool g_button_daemon_started;
static int button_daemon(int argc, char *argv[])
{
#ifdef CONFIG_EXAMPLES_BUTTONS_POLL
struct pollfd fds[CONFIG_INPUT_BUTTONS_NPOLLWAITERS];
struct pollfd fds[1];
#endif
#ifdef CONFIG_EXAMPLES_BUTTONS_SIGNAL
@ -232,7 +232,6 @@ static int button_daemon(int argc, char *argv[])
#ifdef CONFIG_EXAMPLES_BUTTONS_POLL
bool timeout;
bool pollin;
int nbytes;
#endif
@ -256,17 +255,14 @@ static int button_daemon(int argc, char *argv[])
#ifdef CONFIG_EXAMPLES_BUTTONS_POLL
/* Prepare the File Descriptor for poll */
memset(fds, 0,
sizeof(struct pollfd)*CONFIG_INPUT_BUTTONS_NPOLLWAITERS);
memset(fds, 0, sizeof(fds));
fds[0].fd = fd;
fds[0].events = POLLIN;
timeout = false;
pollin = false;
ret = poll(fds, CONFIG_INPUT_BUTTONS_NPOLLWAITERS,
CONFIG_INPUT_BUTTONS_POLL_DELAY);
ret = poll(fds, 1, CONFIG_INPUT_BUTTONS_POLL_DELAY);
printf("\nbutton_daemon: poll returned: %d\n", ret);
if (ret < 0)
@ -283,57 +279,47 @@ static int button_daemon(int argc, char *argv[])
{
printf("button_daemon: ERROR poll reported: %d\n", errno);
}
else
{
pollin = true;
}
/* In any event, read until the pipe is empty */
for (i = 0; i < CONFIG_INPUT_BUTTONS_NPOLLWAITERS; i++)
do
{
do
nbytes = read(fds[0].fd, (void *)&sample, sizeof(btn_buttonset_t));
if (nbytes <= 0)
{
nbytes = read(fds[i].fd, (void *)&sample,
sizeof(btn_buttonset_t));
if (nbytes <= 0)
if (nbytes == 0 || errno == EAGAIN)
{
if (nbytes == 0 || errno == EAGAIN)
if ((fds[0].revents & POLLIN) != 0)
{
if ((fds[i].revents & POLLIN) != 0)
{
printf("button_daemon: ERROR no read data[%d]\n",
i);
}
}
else if (errno != EINTR)
{
printf("button_daemon: read[%d] failed: %d\n", i,
errno);
}
nbytes = 0;
}
else
{
if (timeout)
{
printf("button_daemon: ERROR? Poll timeout, "
"but data read[%d]\n", i);
printf(" (might just be a race "
"condition)\n");
printf("button_daemon: ERROR no read data\n");
}
}
else if (errno != EINTR)
{
printf("button_daemon: read failed: %d\n", errno);
}
/* Suppress error report if no read data on the next time
* through
*/
fds[i].revents = 0;
nbytes = 0;
}
while (nbytes > 0);
else
{
if (timeout)
{
printf("button_daemon: ERROR? Poll timeout, "
"but data read\n");
printf(" (might just be a race "
"condition)\n");
}
}
/* Suppress error report if no read data on the next time
* through
*/
fds[0].revents = 0;
}
while (nbytes > 0);
#endif
#ifdef CONFIG_EXAMPLES_BUTTONS_NAMES