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handle read from timerfd correctly

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When reading the timerfd gives an error, we should return right away
because the timeout did not happen.

If we change the timerfd timeout before reading it, we can get -EAGAIN.
Don't log an error in that case but wait for the new timeout.
This commit is contained in:
Wim Taymans 2022-12-09 17:30:31 +01:00
parent 3a443b4e1c
commit f44d55f6c2
14 changed files with 153 additions and 55 deletions
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13
spa/plugins/support/node-driver.c
View file

@ -32,6 +32,7 @@
#include <spa/support/log.h>
#include <spa/support/loop.h>
#include <spa/utils/names.h>
#include <spa/utils/result.h>
#include <spa/utils/string.h>
#include <spa/node/node.h>
#include <spa/node/keys.h>
@ -180,14 +181,16 @@ static void on_timeout(struct spa_source *source)
struct impl *this = source->data;
uint64_t expirations, nsec, duration;
uint32_t rate;
int res;
spa_log_trace(this->log, "timeout");
if (spa_system_timerfd_read(this->data_system,
this->timer_source.fd, &expirations) < 0) {
if (errno == EAGAIN)
return;
perror("read timerfd");
if ((res = spa_system_timerfd_read(this->data_system,
this->timer_source.fd, &expirations)) < 0) {
if (res != EAGAIN)
spa_log_error(this->log, NAME " %p: timerfd error: %s",
this, spa_strerror(res));
return;
}
nsec = this->next_time;

13
spa/plugins/support/null-audio-sink.c
View file

@ -35,6 +35,7 @@
#include <spa/utils/list.h>
#include <spa/utils/keys.h>
#include <spa/utils/json.h>
#include <spa/utils/result.h>
#include <spa/utils/string.h>
#include <spa/node/node.h>
#include <spa/node/utils.h>
@ -282,14 +283,16 @@ static void on_timeout(struct spa_source *source)
struct impl *this = source->data;
uint64_t expirations, nsec, duration = 10;
uint32_t rate;
int res;
spa_log_trace(this->log, "timeout");
if (spa_system_timerfd_read(this->data_system,
this->timer_source.fd, &expirations) < 0) {
if (errno == EAGAIN)
return;
perror("read timerfd");
if ((res = spa_system_timerfd_read(this->data_system,
this->timer_source.fd, &expirations)) < 0) {
if (res != EAGAIN)
spa_log_error(this->log, NAME " %p: timerfd error: %s",
this, spa_strerror(res));
return;
}
nsec = this->next_time;