diff options
Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 37 |
1 files changed, 37 insertions, 0 deletions
@@ -14608,6 +14608,43 @@ It is a wrapper for the POSIX kill function. If the <signal> argument is omitted, it defaults to the same value as sig-term. +.SH UNIX ITIMERS + +Itimers can be used in combination with signal handling to execute asynchronous +actions. Itimers deliver one-time or periodic signals. For more information, +consult the POSIX specification. + +.SS Variables itimer-real, itimer-virtual and itimer-prof + +.TP +Description: + +These variables correspond to the POSIX constants ITIMER_REAL, ITIMER_VIRTUAL +and ITIMER_PROF. Thir values are suitable as the <timer> argument of +the getitimer and setitimer functions. + +.SS Functions getitimer and setitimer + +.TP +Syntax: + + (getitimer <timer>) + (setitimer <timer> <interval> <value>) + +.TP +Description + +The getitimer function returns the current value of the specified timer, +which must be itimer-real, itimer-virtual or itimer-prof. + +The current value consists of a list of two integer values, which +represents microseconds. The first value is the timer interval, +and the second value is the timer's current value. + +The setitimer function also retrieves the specified timer, exactly +as getitimer. In addition, it stores a new value in the timer, +which is given by the two arguments, expressed in microseconds. + .SH UNIX SYSLOG On platforms where a Unix-like syslog API is available, TXR exports this |