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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [time/] [clock.c] - Rev 308
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/* NetWare can not use this implementation of clock, since it does not have times or any similar function. It provides its own version of clock in clib.nlm. If we can not use clib.nlm, then we must write clock in sys/netware. */ #ifdef CLOCK_PROVIDED int _dummy_clock = 1; #else /* * clock.c * Original Author: G. Haley * * Determines the processor time used by the program since invocation. The time * in seconds is the value returned divided by the value of the macro CLK_TCK. * If the processor time used is not available, (clock_t) -1 is returned. */ /* FUNCTION <<clock>>---cumulative processor time INDEX clock ANSI_SYNOPSIS #include <time.h> clock_t clock(void); TRAD_SYNOPSIS #include <time.h> clock_t clock(); DESCRIPTION Calculates the best available approximation of the cumulative amount of time used by your program since it started. To convert the result into seconds, divide by the macro <<CLOCKS_PER_SEC>>. RETURNS The amount of processor time used so far by your program, in units defined by the machine-dependent macro <<CLOCKS_PER_SEC>>. If no measurement is available, the result is (clock_t)<<-1>>. PORTABILITY ANSI C requires <<clock>> and <<CLOCKS_PER_SEC>>. Supporting OS subroutine required: <<times>>. */ #include <time.h> #include <sys/times.h> #include <reent.h> clock_t clock () { struct tms tim_s; clock_t res; if ((res = (clock_t) _times_r (_REENT, &tim_s)) != -1) res = (clock_t) (tim_s.tms_utime + tim_s.tms_stime + tim_s.tms_cutime + tim_s.tms_cstime); return res; } #endif /* CLOCK_PROVIDED */
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