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* ext/etc/etc.c (etc_nprocessors): New method.

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Accepted by matz at RubyKaigi 2014.
  [ruby-core:65142] [Feature #10267]



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47761 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
akr 2014-10-02 03:23:26 +00:00
parent 57da36ebcf
commit 7b25bd8ba2
3 changed files with 44 additions and 0 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
Thu Oct 2 12:21:52 2014 Tanaka Akira <akr@fsij.org>
* ext/etc/etc.c (etc_nprocessors): New method.
Accepted by matz at RubyKaigi 2014.
[ruby-core:65142] [Feature #10267]
Thu Oct 2 07:56:49 2014 Eric Wong <e@80x24.org>
* iseq.c (rb_iseq_line_trace_each): explicit cast

33
ext/etc/etc.c
View file

@ -891,6 +891,38 @@ io_pathconf(VALUE io, VALUE arg)
#define io_pathconf rb_f_notimplement
#endif
#if defined(HAVE_SYSCONF) && defined(_SC_NPROCESSORS_ONLN)
/*
* Returns the number of online processors.
*
* The result is intended as the number of processes to
* use all available processors.
*
* This method is implemented as:
* - sysconf(_SC_NPROCESSORS_ONLN): GNU/Linux, NetBSD, FreeBSD, OpenBSD, DragonFly BSD, OpenIndiana, Mac OS X, AIX
*
* Example:
*
* require 'etc'
* p Etc.nprocessors #=> 4
*
*/
static VALUE
etc_nprocessors(VALUE obj)
{
long ret;
errno = 0;
ret = sysconf(_SC_NPROCESSORS_ONLN);
if (ret == -1) {
rb_sys_fail("sysconf(_SC_NPROCESSORS_ONLN)");
}
return LONG2NUM(ret);
}
#else
#define etc_nprocessors rb_f_notimplement
#endif
/*
* The Etc module provides access to information typically stored in
* files in the /etc directory on Unix systems.
@ -946,6 +978,7 @@ Init_etc(void)
rb_define_module_function(mEtc, "sysconf", etc_sysconf, 1);
rb_define_module_function(mEtc, "confstr", etc_confstr, 1);
rb_define_method(rb_cIO, "pathconf", io_pathconf, 1);
rb_define_module_function(mEtc, "nprocessors", etc_nprocessors, 0);
sPasswd = rb_struct_define_under(mEtc, "Passwd",
"name",

5
test/etc/test_etc.rb
View file

@ -159,4 +159,9 @@ class TestEtc < Test::Unit::TestCase
}
end if defined?(Etc::PC_PIPE_BUF)
def test_nprocessors
n = Etc.nprocessors
assert_operator(1, :<=, n)
end
end