|TIMER_CREATE(3C)||Standard C Library Functions||TIMER_CREATE(3C)|
#include <signal.h> #include <time.h> int timer_create(clockid_t clock_id, struct sigevent *restrict evp, timer_t *restrict timerid);
The evp argument, if non-null, points to a sigevent structure. This structure, allocated by the application, defines the asynchronous notification that will occur when the timer expires (see signal.h(3HEAD) for event notification details). If the evp argument is NULL, the effect is as if the evp argument pointed to a sigevent structure with the sigev_notify member having the value SIGEV_SIGNAL, the sigev_signo having the value SIGALRM, and the sigev_value member having the value of the timer ID.
The system defines a set of clocks that can be used as timing bases for per-process timers. The following values for clock_id are supported:
For timers created with a clock_id of CLOCK_HIGHRES, the system will attempt to use an optimal hardware source. This may include, but is not limited to, per-CPU timer sources. The actual hardware source used is transparent to the user and may change over the lifetime of the timer. For example, if the caller that created the timer were to change its processor binding or its processor set, the system may elect to drive the timer with a hardware source that better reflects the new binding. Timers based on a clock_id of CLOCK_HIGHRES are ideally suited for interval timers that have minimal jitter tolerance.
|ATTRIBUTE TYPE||ATTRIBUTE VALUE|
|MT-Level||MT-Safe with exceptions|
|October 4, 2021||OmniOS|