* gc.c: introduce tomb heap.
  Tomb heap is where zombie objects and ghost (freed slot) lived in.
  Separate from other heaps (now there is only eden heap) at sweeping
  helps freeing pages more efficiently.
  Before this patch, even if there is an empty page at former phase
  of sweeping, we can't free it.
  Algorithm:
    (1) Sweeping all pages in a heap and move empty pages from the
        heap to tomb_heap.
    (2) Check all exsisting pages and free a page
        if all slots of this page are empty and
           there is enough empty slots (checking by swept_num)
  To introduce this pach, there are several tuning of GC parameters.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43395 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* gc.c (heap_pages_free_unused_pages): cast to (int) for size_t
  variable `i'.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43396 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* gc.c: move increment from heap to heap_pages.
  Share `increment' information with heaps.
* gc.c: change ratio of heap_pages_free_min_page
  to 0.80.
  This change means slow down page freeing speed.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43397 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Makefile.sub: C99 mathematics functions

* win32/Makefile.sub (config.h): VC 2013 supports C99 mathematics
  functions.  [ruby-core:57981] [Bug #9044]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43398 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* gc.c: Rename free_min to min_free_slots and free_min_page to max_free_slots. The algorithm for heap growth is:

    if (swept_slots < min_free_slots) pages++
    if (swept_slots > max_free_slots) pages--

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43399 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2013-10-24

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43400 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* array.c: Add Array#to_h [Feature #7292]

* enum.c: Add Enumerable#to_h

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43401 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* lib/ostruct.rb: Raise RuntimeError when modifying frozen instances
  instead of TypeError. Patch by Kenichi Kamiya. [Fixes GH-383]

* test/ostruct/test_ostruct.rb: Added tests for above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43402 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* lib/ostruct.rb (OpenStruct#delete): Use the converted argument.
  Patch by Kenichi Kamiya. [Fixes GH-383]

* test/ostruct/test_ostruct.rb: Added tests for above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43403 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* lib/ostruct.rb (Struct#each_pair): Return an enumerator with size
  Patch by Kenichi Kamiya. [Fixes GH-383]

* test/ostruct/test_ostruct.rb: Added tests for above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43404 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* lib/ostruct.rb: raise NoMethodError with a #name and #args.
  Patch by Kenichi Kamiya. [Fixes GH-383]

* test/ostruct/test_ostruct.rb: Added tests for above.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43405 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* ChangeLog: adjust indent.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43406 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Makefile.sub: C99 mathematics functions

* win32/Makefile.sub (config.h): fix version number of runtime
  library.  log2 needs to be defined, not only HAVE_LOG2.
  [ruby-core:57992] [Bug #9044]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43407 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
win32.h: suppress INFINITY warnings

* include/ruby/win32.h (rb_infinity_float): suppress overflow in
  constant arithmetic warnings.  [ruby-core:57981] [Bug #9044]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43408 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* gc.c: add new initial_growth_max tuning parameter.  [ruby-core:57928] [Bug #9035]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43409 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* thread.c (rb_thread_terminate_all): add a comment why infinite
  sleep is safe.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43410 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* thread.c (rb_thread_terminate_all): add a comment why we need
  state check and call terminate_i again.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43411 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* object.c: [DOC] Document first argument also takes string for:

  rb_mod_const_get, rb_mod_const_set, rb_mod_const_defined

  Also added note about NameError exception for invalid constant name


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43412 b2dd03c8-39d4-4d8f-98ff-823fe69b080e