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Align ticker to the full or half second.

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This commit is contained in:
Werner Koch 2008-12-08 19:10:42 +00:00
parent e46668599d
commit 78ff45c49e
5 changed files with 64 additions and 24 deletions
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26
scd/scdaemon.c
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@ -156,7 +156,7 @@ static ARGPARSE_OPTS opts[] = {
#define DEFAULT_PCSC_DRIVER "libpcsclite.so"
#endif
/* The timer tick used for housekeeping stuff. We poll every 250ms to
/* The timer tick used for housekeeping stuff. We poll every 500ms to
let the user immediately know a status change.
This is not too good for power saving but given that there is no
@ -167,7 +167,7 @@ static ARGPARSE_OPTS opts[] = {
mechanism. Given that a native thread could only be used under W32
we don't do that at all. */
#define TIMERTICK_INTERVAL_SEC (0)
#define TIMERTICK_INTERVAL_USEC (250000)
#define TIMERTICK_INTERVAL_USEC (500000)
/* Flag to indicate that a shutdown was requested. */
static int shutdown_pending;
@ -1152,11 +1152,25 @@ handle_connections (int listen_fd)
listen_fd = -1;
}
/* Create a timeout event if needed. */
/* Create a timeout event if needed. Round it up to the next
microsecond interval to help with power saving. */
if (!time_ev)
time_ev = pth_event (PTH_EVENT_TIME,
pth_timeout (TIMERTICK_INTERVAL_SEC,
TIMERTICK_INTERVAL_USEC));
{
pth_time_t nexttick = pth_timeout (TIMERTICK_INTERVAL_SEC,
TIMERTICK_INTERVAL_USEC/2);
if ((nexttick.tv_usec % (TIMERTICK_INTERVAL_USEC/2)) > 10)
{
nexttick.tv_usec = ((nexttick.tv_usec
/(TIMERTICK_INTERVAL_USEC/2))
+ 1) * (TIMERTICK_INTERVAL_USEC/2);
if (nexttick.tv_usec >= 1000000)
{
nexttick.tv_sec++;
nexttick.tv_usec = 0;
}
}
time_ev = pth_event (PTH_EVENT_TIME, nexttick);
}
/* POSIX says that fd_set should be implemented as a structure,
thus a simple assignment is fine to copy the entire set. */