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serialqueue: Make sure fds are in non-blocking mode 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2017-08-14 16:34:54 -04:00
parent 085817d332
commit 4b5109c1b9
1 changed files with 20 additions and 0 deletions
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20
klippy/serialqueue.c
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@ -12,6 +12,7 @@
// clock times, prioritizes commands, and handles retransmissions. A
// background thread is launched to do this work and minimize latency.
#include <fcntl.h> // fcntl
#include <math.h> // ceil
#include <poll.h> // poll
#include <pthread.h> // pthread_mutex_lock
@ -178,6 +179,22 @@ pollreactor_is_exit(struct pollreactor *pr)
return pr->must_exit;
}
static int
set_non_blocking(int fd)
{
int flags = fcntl(fd, F_GETFL);
if (flags < 0) {
report_errno("fcntl getfl", flags);
return -1;
}
int ret = fcntl(fd, F_SETFL, flags | O_NONBLOCK);
if (ret < 0) {
report_errno("fcntl setfl", flags);
return -1;
}
return 0;
}
/****************************************************************
* Serial protocol helpers
@ -776,6 +793,9 @@ serialqueue_alloc(int serial_fd, int write_only)
pollreactor_add_fd(&sq->pr, SQPF_PIPE, sq->pipe_fds[0], kick_event);
pollreactor_add_timer(&sq->pr, SQPT_RETRANSMIT, retransmit_event);
pollreactor_add_timer(&sq->pr, SQPT_COMMAND, command_event);
set_non_blocking(serial_fd);
set_non_blocking(sq->pipe_fds[0]);
set_non_blocking(sq->pipe_fds[1]);
// Retransmit setup
sq->send_seq = 1;