diff options
Diffstat (limited to 'scd/scdaemon.c')
| -rw-r--r-- | scd/scdaemon.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/scd/scdaemon.c b/scd/scdaemon.c index fc33be3a6..5f3078c19 100644 --- a/scd/scdaemon.c +++ b/scd/scdaemon.c @@ -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. */ |