diff options
Diffstat (limited to 'process.c')
| -rw-r--r-- | process.c | 28 |
1 files changed, 25 insertions, 3 deletions
@@ -6713,14 +6713,21 @@ rb_proc_times(VALUE obj) * getrusage() is defined by Single Unix Specification. * The result is addition of ru_utime and ru_stime. * The resolution is 1 micro second. + * [:ISO_C_CLOCK_CLOCK_PROCESS_CPUTIME_ID] + * Use clock() defined by ISO C. + * The resolution is 1/CLOCKS_PER_SEC. + * CLOCKS_PER_SEC is the C-level macro defined by time.h. + * Single Unix Specification defines CLOCKS_PER_SEC is 1000000. + * Non-Unix systems may define it a different value, though. + * If CLOCKS_PER_SEC is 1000000 as SUS, the resolution is 1 micro second. * [:POSIX_TIMES_CALLING_PROCESS_USER_AND_SYSTEM_TIME_CLOCK_PROCESS_CPUTIME_ID] - * Use times(). - * times() is defined by POSIX. + * Use times() defined by POSIX. * The result is addition of tms_utime and tms_stime. * tms_cutime and tms_cstime are ignored. * The resolution is the clock tick. * "getconf CLK_TCK" command shows the clock ticks per second. * (The clock ticks per second is defined by HZ macro in older systems.) + * If it is 100, the resolution is 10 milli second. * * If the given +clock_id+ is not supported, Errno::EINVAL is raised. * @@ -6811,6 +6818,21 @@ rb_clock_gettime(int argc, VALUE *argv) } #endif +#define RUBY_ISO_C_CLOCK_CLOCK_PROCESS_CPUTIME_ID \ + ID2SYM(rb_intern("ISO_C_CLOCK_CLOCK_PROCESS_CPUTIME_ID")) + if (clk_id == RUBY_ISO_C_CLOCK_CLOCK_PROCESS_CPUTIME_ID) { + double ns; + clock_t c; + c = clock(); + errno = 0; + if (c == (clock_t)-1) + rb_sys_fail("clock"); + ns = c * (1e9 / CLOCKS_PER_SEC); + ts.tv_sec = (time_t)(ns*1e-9); + ts.tv_nsec = ns - ts.tv_sec*1e9; + goto success; + } + #ifdef HAVE_TIMES #define RUBY_POSIX_TIMES_CALLING_PROCESS_USER_AND_SYSTEM_TIME_CLOCK_PROCESS_CPUTIME_ID \ ID2SYM(rb_intern("POSIX_TIMES_CALLING_PROCESS_USER_AND_SYSTEM_TIME_CLOCK_PROCESS_CPUTIME_ID")) @@ -6819,7 +6841,7 @@ rb_clock_gettime(int argc, VALUE *argv) struct tms buf; if (times(&buf) == (clock_t)-1) rb_sys_fail("times"); - ns = ((double)buf.tms_utime + buf.tms_stime) * 1e9 / get_clk_tck(); + ns = ((double)buf.tms_utime + buf.tms_stime) * (1e9 / get_clk_tck()); ts.tv_sec = (time_t)(ns*1e-9); ts.tv_nsec = ns - ts.tv_sec*1e9; goto success; |