The timeout is not supposed to expire when ignored messages are received. This cannot be handled with the poll() timeout, so add a separate timer.
Reported-by: Martin Tarenskeen m.tarenskeen@gmail.com Signed-off-by: Clemens Ladisch clemens@ladisch.de --- amidi/amidi.c | 69 ++++++++++++++++++++++++++++++++++++++++++++------------- 1 file changed, 53 insertions(+), 16 deletions(-)
diff --git a/amidi/amidi.c b/amidi/amidi.c index 5871512..c20512c 100644 --- a/amidi/amidi.c +++ b/amidi/amidi.c @@ -25,9 +25,11 @@ #include <stdarg.h> #include <string.h> #include <ctype.h> +#include <math.h> #include <getopt.h> #include <errno.h> #include <signal.h> +#include <sys/timerfd.h> #include <sys/types.h> #include <sys/poll.h> #include <sys/stat.h> @@ -37,6 +39,8 @@ #include "aconfig.h" #include "version.h"
+#define NSEC_PER_SEC 1000000000L + static int do_device_list, do_rawmidi_list; static char *port_name = "default"; static char *send_file_name; @@ -46,7 +50,7 @@ static char *send_data; static int send_data_length; static int receive_file; static int dump; -static int timeout; +static float timeout; static int stop; static snd_rawmidi_t *input, **inputp; static snd_rawmidi_t *output, **outputp; @@ -427,6 +431,7 @@ int main(int argc, char *argv[]) int ignore_active_sensing = 1; int ignore_clock = 1; int do_send_hex = 0; + struct itimerspec itimerspec = { .it_interval = { 0, 0 } };
while ((c = getopt_long(argc, argv, short_options, long_options, NULL)) != -1) { @@ -461,7 +466,7 @@ int main(int argc, char *argv[]) dump = 1; break; case 't': - timeout = atoi(optarg); + timeout = atof(optarg); break; case 'a': ignore_active_sensing = 0; @@ -552,40 +557,64 @@ int main(int argc, char *argv[])
if (inputp) { int read = 0; - int npfds, time = 0; + int npfds; struct pollfd *pfds;
- timeout *= 1000; - npfds = snd_rawmidi_poll_descriptors_count(input); + npfds = 1 + snd_rawmidi_poll_descriptors_count(input); pfds = alloca(npfds * sizeof(struct pollfd)); - snd_rawmidi_poll_descriptors(input, pfds, npfds); + + if (timeout > 0) { + pfds[0].fd = timerfd_create(CLOCK_MONOTONIC, 0); + if (pfds[0].fd == -1) { + error("cannot create timer: %s", strerror(errno)); + goto _exit; + } + pfds[0].events = POLLIN; + } else { + pfds[0].fd = -1; + } + + snd_rawmidi_poll_descriptors(input, &pfds[1], npfds - 1); + signal(SIGINT, sig_handler); + + if (timeout > 0) { + float timeout_int; + + itimerspec.it_value.tv_nsec = modff(timeout, &timeout_int) * NSEC_PER_SEC; + itimerspec.it_value.tv_sec = timeout_int; + err = timerfd_settime(pfds[0].fd, 0, &itimerspec, NULL); + if (err < 0) { + error("cannot set timer: %s", strerror(errno)); + goto _exit; + } + } for (;;) { unsigned char buf[256]; int i, length; unsigned short revents;
- err = poll(pfds, npfds, 200); + err = poll(pfds, npfds, -1); if (stop || (err < 0 && errno == EINTR)) break; if (err < 0) { error("poll failed: %s", strerror(errno)); break; } - if (err == 0) { - time += 200; - if (timeout && time >= timeout) - break; - continue; - } - if ((err = snd_rawmidi_poll_descriptors_revents(input, pfds, npfds, &revents)) < 0) { + + err = snd_rawmidi_poll_descriptors_revents(input, &pfds[1], npfds - 1, &revents); + if (err < 0) { error("cannot get poll events: %s", snd_strerror(errno)); break; } if (revents & (POLLERR | POLLHUP)) break; - if (!(revents & POLLIN)) + if (!(revents & POLLIN)) { + if (pfds[0].revents & POLLIN) + break; continue; + } + err = snd_rawmidi_read(input, buf, sizeof(buf)); if (err == -EAGAIN) continue; @@ -603,7 +632,7 @@ int main(int argc, char *argv[]) if (length == 0) continue; read += length; - time = 0; + if (receive_file != -1) write(receive_file, buf, length); if (dump) { @@ -611,6 +640,14 @@ int main(int argc, char *argv[]) print_byte(buf[i]); fflush(stdout); } + + if (timeout > 0) { + err = timerfd_settime(pfds[0].fd, 0, &itimerspec, NULL); + if (err < 0) { + error("cannot set timer: %s", strerror(errno)); + break; + } + } } if (isatty(fileno(stdout))) printf("\n%d bytes read\n", read);