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Return the clock ID of the CPU-time clock from a specified thread
#include <sys/types.h> #include <time.h> #include <pthread.h> int pthread_getcpuclockid( pthread_t id, clockid_t* clock_id);
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The pthread_getcpuclockid() function gets the clock ID of the CPU-time clock of the thread specified by id (if the thread exists) and stores the clock ID in the object that clock_id points to. The CPU-time clock represents the amount of time the thread has spent actually running.
#include <stdio.h> #include <stdlib.h> #include <time.h> #include <errno.h> #include <pthread.h> int main( int argc, const char *argv[] ) { clockid_t clk_id; struct timespec tspec; pthread_t tid; tid = pthread_self(); if (pthread_getcpuclockid( tid, &clk_id) == 0) { if (clock_gettime( clk_id, &tspec ) != 0) { perror ("clock_gettime():"); } else { printf ("CPU time for tid %d is %d seconds, %ld nanoseconds.\n", tid, tspec.tv_sec, tspec.tv_nsec); } } else { printf ("pthread_getcpuclockid(): no thread with ID %d.\n", tid); } return EXIT_SUCCESS; }
Safety: | |
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Cancellation point | No |
Interrupt handler | No |
Signal handler | Yes |
Thread | Yes |
clock_getcpuclockid(), clock_getres(), clock_gettime(), ClockId(), clock_settime(), timer_create()
Clocks, Timers, and Getting a Kick Every So Often chapter of Getting Started with QNX Neutrino
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