src/time/clock.c

570af302Sopenharmony_ci#include <time.h>
570af302Sopenharmony_ci#include <limits.h>
570af302Sopenharmony_ci#include <unsupported_api.h>
570af302Sopenharmony_ci
570af302Sopenharmony_ciclock_t clock()
570af302Sopenharmony_ci{
570af302Sopenharmony_ci	struct timespec ts;
570af302Sopenharmony_ci
570af302Sopenharmony_ci	UNSUPPORTED_API_VOID(LITEOS_A);
570af302Sopenharmony_ci
570af302Sopenharmony_ci	if (__clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts))
570af302Sopenharmony_ci		return -1;
570af302Sopenharmony_ci
570af302Sopenharmony_ci	if (ts.tv_sec > LONG_MAX/1000000
570af302Sopenharmony_ci	 || ts.tv_nsec/1000 > LONG_MAX-1000000*ts.tv_sec)
570af302Sopenharmony_ci		return -1;
570af302Sopenharmony_ci
570af302Sopenharmony_ci	return ts.tv_sec*1000000 + ts.tv_nsec/1000;
570af302Sopenharmony_ci}