Get the value of an interval timer
#include <sys/time.h> int getitimer ( int which, struct itimerval *value );
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The system provides each process with several interval timers, defined in <sys/time.h>. The getitimer() function stores the current value of the timer specified by which into the structure pointed to by value.
A timer value is defined by the itimerval structure (see gettimeofday() for the definition of timeval), which includes the following members:
struct timeval it_interval; /* timer interval */ struct timeval it_value; /* current value */
The it_value member indicates the time to the next timer expiration. The it_interval member specifies a value to be used in reloading it_value when the timer expires. Setting it_value to 0 disables a timer, regardless of the value of it_interval. Setting it_interval to 0 disables a timer after its next expiration (assuming it_value is nonzero).
Time values smaller than the resolution of the system clock are rounded up to the resolution of the system clock.
The interval timers include:
POSIX 1003.1 XSI
alarm(), gettimeofday(), pthread_attr_setscope(), pthread_sigmask(), setitimer(), sigprocmask(), sleep(), sysconf()
Tick, Tock: Understanding the Neutrino Microkernel's Concept of Time chapter of the QNX Neutrino Programmer's Guide