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cron: New API for absolute timers

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This patch adds support for at/cron-like jobs that need an absolute
timer.  The API supports waking up with an UEV_HUP callback event if the
wall clock changed due to NTP or user input while waiting.

- uev_cron_init()
- uev_cron_set()
- uev_cron_start()
- uev_cron_stop()

A very simple cronrun example/test program is also included.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
This commit is contained in:
Joachim Nilsson committed 2016-10-30 15:08:34 +01:00
1 parent 52d8d7109b
commit 59e1d376db
9 files changed
+301 -15
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uev.h
+6
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@@ -35,6 +35,7 @@
#define UEV_READ EPOLLIN
#define UEV_WRITE EPOLLOUT
#define UEV_PRI EPOLLPRI
#define UEV_HUP EPOLLHUP
/* Run flags */
#define UEV_ONCE 1
@@ -69,6 +70,11 @@ int uev_timer_set (uev_t *w, int timeout, int period);
int uev_timer_start (uev_t *w);
int uev_timer_stop (uev_t *w);
int uev_cron_init (uev_ctx_t *ctx, uev_t *w, uev_cb_t *cb, void *arg, time_t when, time_t interval);
int uev_cron_set (uev_t *w, time_t when, time_t interval);
int uev_cron_start (uev_t *w);
int uev_cron_stop (uev_t *w);
int uev_signal_init (uev_ctx_t *ctx, uev_t *w, uev_cb_t *cb, void *arg, int signo);
int uev_signal_set (uev_t *w, int signo);
int uev_signal_start (uev_t *w);