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Feature #8658 » clock_gettime-4.patch

akr (Akira Tanaka), 08/05/2013 09:50 PM

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configure.in (working copy)
@%:@include <sys/resource.h>
])
RUBY_REPLACE_TYPE(off_t, [], OFFT)
RUBY_REPLACE_TYPE(clockid_t, [], CLOCKID)
AC_CACHE_CHECK(for prototypes, rb_cv_have_prototypes,
[AC_TRY_COMPILE([int foo(int x) { return 0; }], [return foo(10);],
test/ruby/test_process.rb (working copy)
end
end if windows?
def test_clock_gettime
t1 = Process.clock_gettime(Process::CLOCK_REALTIME, :nanoseconds)
t2 = Time.now; t2 = t2.tv_sec * 1000000000 + t2.tv_nsec
t3 = Process.clock_gettime(Process::CLOCK_REALTIME, :nanoseconds)
assert_operator(t1, :<=, t2)
assert_operator(t2, :<=, t3)
assert_raise(Errno::EINVAL) { Process.clock_gettime(:foo) }
end
end
process.c (working copy)
# include "nacl/unistd.h"
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_SYS_TIMES_H
#include <sys/times.h>
#endif
......
#define rb_proc_times rb_f_notimplement
#endif
/*
* call-seq:
* Process.clock_gettime(clk_id [, unit]) -> number
*
* Returns a time returned by POSIX clock_gettime() function.
*
* _clk_id_ specifies a kind of clock.
* It is specifed as a constant which begins with <code>Process::CLOCK_</code>
* such like <code>Process::CLOCK_REALTIME</code> and
* <code>Process::CLOCK_MONOTONIC</code>.
* The supported constants depends on OS and version.
* Ruby provides following type of _clk_id_ if available.
*
* [CLOCK_REALTIME] SUSv2 to 4, Linux 2.5.63, FreeBSD 3.0, NetBSD 2.0, OpenBSD 2.1
* [CLOCK_MONOTONIC] SUSv3 to 4, Linux 2.5.63, FreeBSD 3.0, NetBSD 2.0, OpenBSD 3.4
* [CLOCK_PROCESS_CPUTIME_ID] SUSv3 to 4, Linux 2.5.63
* [CLOCK_THREAD_CPUTIME_ID] SUSv3 to 4, Linux 2.5.63
* [CLOCK_VIRTUAL] FreeBSD 3.0, OpenBSD 2.1
* [CLOCK_PROF] FreeBSD 3.0, OpenBSD 2.1
* [CLOCK_REALTIME_FAST] FreeBSD 8.1
* [CLOCK_REALTIME_PRECISE] FreeBSD 8.1
* [CLOCK_MONOTONIC_FAST] FreeBSD 8.1
* [CLOCK_MONOTONIC_PRECISE] FreeBSD 8.1
* [CLOCK_MONOTONIC_RAW] Linux 2.6.28
* [CLOCK_UPTIME] FreeBSD 7.0
* [CLOCK_UPTIME_FAST] FreeBSD 8.1
* [CLOCK_UPTIME_PRECISE] FreeBSD 8.1
* [CLOCK_SECOND] FreeBSD 8.1
*
* If the given _clk_id_ is not supported, Errno::EINVAL is raised.
*
* _unit_ specifies a type of the return value.
*
* [:float_seconds] number of seconds as a float (default)
* [:float_milliseconds] number of milliseconds as a float
* [:float_microseconds] number of microseconds as a float
* [:milliseconds] number of milliseconds as an integer
* [:microseconds] number of microseconds as an integer
* [:nanoseconds] number of nanoseconds as an integer
*
* The underlying function, clock_gettime(), returns a number of nanoseconds.
* Float object (IEEE 754 double) is not enough to represent
* the return value for CLOCK_REALTIME.
* If the exact nanoseconds value is required, use :nanoseconds as _unit_.
*
* The origin (zero) of the returned value varies.
* For example, system start up time, process start up time, the Epoch, etc.
*
* The origin in CLOCK_REALTIME is defined as the Epoch
* (1970-01-01 00:00:00 UTC).
* But some systems count leap seconds and others doesn't.
* So the result can be interpreted differently across systems.
*
* p Process.clock_gettime(Process::CLOCK_MONOTONIC)
* #=> 2684827897652283
*
*/
VALUE
rb_clock_gettime(int argc, VALUE *argv)
{
struct timespec ts;
VALUE clk_id, unit;
int ret;
long factor;
rb_scan_args(argc, argv, "11", &clk_id, &unit);
if (SYMBOL_P(clk_id)) {
/*
* Non-clock_gettime clocks are provided by symbol clk_id.
*
* gettimeofday is always available on platforms supported by Ruby.
* POSIX_GETTIMEOFDAY_CLOCK_REALTIME is used for
* CLOCK_REALTIME if clock_gettime is not available.
*/
#define RUBY_POSIX_GETTIMEOFDAY_CLOCK_REALTIME ID2SYM(rb_intern("POSIX_GETTIMEOFDAY_CLOCK_REALTIME"))
if (clk_id == RUBY_POSIX_GETTIMEOFDAY_CLOCK_REALTIME) {
struct timeval tv;
ret = gettimeofday(&tv, 0);
if (ret != 0)
rb_sys_fail("gettimeofday");
ts.tv_sec = tv.tv_sec;
ts.tv_nsec = tv.tv_usec * 1000;
goto success;
}
#define RUBY_POSIX_TIME_CLOCK_REALTIME ID2SYM(rb_intern("POSIX_TIME_CLOCK_REALTIME"))
if (clk_id == RUBY_POSIX_TIME_CLOCK_REALTIME) {
time_t t;
t = time(NULL);
if (t == (time_t)-1)
rb_sys_fail("time");
ts.tv_sec = t;
ts.tv_nsec = 0;
goto success;
}
}
else {
#if defined(HAVE_CLOCK_GETTIME)
clockid_t c;
c = NUM2CLOCKID(clk_id);
ret = clock_gettime(c, &ts);
if (ret == -1)
rb_sys_fail("clock_gettime");
goto success;
#endif
}
/* EINVAL emulates clock_gettime behavior when clock_id is invalid. */
errno = EINVAL;
rb_sys_fail(0);
success:
if (unit == ID2SYM(rb_intern("nanoseconds"))) {
factor = 1000000000;
goto return_integer;
}
else if (unit == ID2SYM(rb_intern("microseconds"))) {
factor = 1000000;
goto return_integer;
}
else if (unit == ID2SYM(rb_intern("milliseconds"))) {
factor = 1000;
goto return_integer;
}
else if (unit == ID2SYM(rb_intern("float_microseconds"))) {
factor = 1000000;
goto return_float;
}
else if (unit == ID2SYM(rb_intern("float_milliseconds"))) {
factor = 1000;
goto return_float;
}
else if (NIL_P(unit) || unit == ID2SYM(rb_intern("float_seconds"))) {
factor = 1;
goto return_float;
}
else {
rb_raise(rb_eArgError, "unexpected unit: %"PRIsVALUE, unit);
}
return_float:
return DBL2NUM((ts.tv_sec + 1e-9 * (double)ts.tv_nsec) / factor);
return_integer:
#if defined(HAVE_LONG_LONG)
if (!MUL_OVERFLOW_SIGNED_INTEGER_P(factor, (LONG_LONG)ts.tv_sec,
LLONG_MIN, LLONG_MAX-(factor-1))) {
return LL2NUM(ts.tv_nsec/(1000000000/factor) + factor * (LONG_LONG)ts.tv_sec);
}
#endif
return rb_funcall(LONG2FIX(ts.tv_nsec/(1000000000/factor)), '+', 1,
rb_funcall(LONG2FIX(factor), '*', 1, TIMET2NUM(ts.tv_sec)));
}
VALUE rb_mProcess;
VALUE rb_mProcUID;
VALUE rb_mProcGID;
......
rb_define_module_function(rb_mProcess, "times", rb_proc_times, 0);
#ifdef CLOCK_REALTIME
rb_define_const(rb_mProcess, "CLOCK_REALTIME", CLOCKID2NUM(CLOCK_REALTIME));
#elif defined(RUBY_POSIX_GETTIMEOFDAY_CLOCK_REALTIME)
rb_define_const(rb_mProcess, "CLOCK_REALTIME", RUBY_POSIX_GETTIMEOFDAY_CLOCK_REALTIME);
#endif
#ifdef CLOCK_MONOTONIC
rb_define_const(rb_mProcess, "CLOCK_MONOTONIC", CLOCKID2NUM(CLOCK_MONOTONIC));
#endif
#ifdef CLOCK_PROCESS_CPUTIME_ID
rb_define_const(rb_mProcess, "CLOCK_PROCESS_CPUTIME_ID", CLOCKID2NUM(CLOCK_PROCESS_CPUTIME_ID));
#endif
#ifdef CLOCK_THREAD_CPUTIME_ID
rb_define_const(rb_mProcess, "CLOCK_THREAD_CPUTIME_ID", CLOCKID2NUM(CLOCK_THREAD_CPUTIME_ID));
#endif
#ifdef CLOCK_VIRTUAL
rb_define_const(rb_mProcess, "CLOCK_VIRTUAL", CLOCKID2NUM(CLOCK_VIRTUAL));
#endif
#ifdef CLOCK_PROF
rb_define_const(rb_mProcess, "CLOCK_PROF", CLOCKID2NUM(CLOCK_PROF));
#endif
#ifdef CLOCK_REALTIME_FAST
rb_define_const(rb_mProcess, "CLOCK_REALTIME_FAST", CLOCKID2NUM(CLOCK_REALTIME_FAST));
#endif
#ifdef CLOCK_REALTIME_PRECISE
rb_define_const(rb_mProcess, "CLOCK_REALTIME_PRECISE", CLOCKID2NUM(CLOCK_REALTIME_PRECISE));
#endif
#ifdef CLOCK_MONOTONIC_FAST
rb_define_const(rb_mProcess, "CLOCK_MONOTONIC_FAST", CLOCKID2NUM(CLOCK_MONOTONIC_FAST));
#endif
#ifdef CLOCK_MONOTONIC_PRECISE
rb_define_const(rb_mProcess, "CLOCK_MONOTONIC_PRECISE", CLOCKID2NUM(CLOCK_MONOTONIC_PRECISE));
#endif
#ifdef CLOCK_MONOTONIC_RAW
rb_define_const(rb_mProcess, "CLOCK_MONOTONIC_RAW", CLOCKID2NUM(CLOCK_MONOTONIC_RAW));
#endif
#ifdef CLOCK_UPTIME
rb_define_const(rb_mProcess, "CLOCK_UPTIME", CLOCKID2NUM(CLOCK_UPTIME));
#endif
#ifdef CLOCK_UPTIME_FAST
rb_define_const(rb_mProcess, "CLOCK_UPTIME_FAST", CLOCKID2NUM(CLOCK_UPTIME_FAST));
#endif
#ifdef CLOCK_UPTIME_PRECISE
rb_define_const(rb_mProcess, "CLOCK_UPTIME_PRECISE", CLOCKID2NUM(CLOCK_UPTIME_PRECISE));
#endif
#ifdef CLOCK_SECOND
rb_define_const(rb_mProcess, "CLOCK_SECOND", CLOCKID2NUM(CLOCK_SECOND));
#endif
rb_define_module_function(rb_mProcess, "clock_gettime", rb_clock_gettime, -1);
#if defined(HAVE_TIMES) || defined(_WIN32)
rb_cProcessTms = rb_struct_define("Tms", "utime", "stime", "cutime", "cstime", NULL);
#endif
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