git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43800 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  rb_gc_set_params because it's only used in ruby internal.

* internal.h (ruby_gc_set_params): Declare rb_gc_set_params's
  alias function.

* gc.c: ditto.

* ruby.c: use ruby_gc_set_params.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43794 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* gc.c (rb_define_finalizer, rb_undefine_finalizer): rename and export
  finalizer functions.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43631 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  RGenGC is designed as 2 generational GC, young and old generation.
  Young objects will be promoted to old objects after one GC.
  Old objects are not collect until major (full) GC.
  The issue of this approach is some objects can promoted as old
  objects accidentally and not freed until major GC.
  Major GC is not frequently so short-lived but accidentally becoming
  old objects are not freed.
  For example, the program "loop{Array.new(1_000_000)}" consumes huge
  memories because short lived objects (an array which has 1M
  elements) are promoted while GC and they are not freed before major
  GC.
  To solve this problem, generational GC with more generations
  technique is known. This patch implements three generations gen GC.
  At first, newly created objects are "Infant" objects.
  After surviving one GC, "Infant" objects are promoted to "Young"
  objects.
  "Young" objects are promoted to "Old" objects after surviving
  next GC.
  "Infant" and "Young" objects are collected if it is not marked
  while minor GC. So that this technique solves this problem.
  Representation of generations:
  * Infant: !FL_PROMOTED and !oldgen_bitmap [00]
  * Young :  FL_PROMOTED and !oldgen_bitmap [10]
  * Old   :  FL_PROMOTED and  oldgen_bitmap [11]
  The macro "RGENGC_THREEGEN" enables/disables this feature, and
  turned off as default because there are several problems.
  (1) Failed sometimes (Heisenbugs).
  (2) Performance down.
      Especially on write barriers. We need to detect Young or Old
      object by oldgen_bitmap. It is slower than checking flags.
  To evaluate this feature on more applications, I commit this patch.
  Reports are very welcome.
  This patch includes some refactoring (renaming names, etc).
* include/ruby/ruby.h: catch up 3gen GC.
* .gdbinit: fix to show a prompt "[PROMOTED]" for promoted objects.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43530 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  This flag represents that "this object is promoted at least once."
* gc.c, debug.c, object.c: catch up this change.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43527 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* string.c (rb_str_scrub): export with fixed length arguments, and
  allow nil as replacement string instead of omitting.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43500 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43465 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  * RUBY_TYPED_FREE_IMMEDIATELY: free the data given by DATA_PTR()
    with dfree function immediately.  Otherwise (default), the data
    freed at finalizaton point.
  * RUBY_TYPED_WB_PROTECTED: make this object with FL_WB_PROTECT
    (not shady).
* gc.c (obj_free): support RUBY_TYPED_FREE_IMMEDIATELY.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43463 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  ruby_vm_global_state_version into two separate counters - one for the
  global method state and one for the global constant state. This means
  changes to constants do not affect method caches, and changes to
  methods do not affect constant caches. In particular, this means
  inclusions of modules containing constants no longer globally
  invalidate the method cache.

* class.c, eval.c, include/ruby/intern.h, insns.def, vm.c, vm_method.c:
  rename rb_clear_cache_by_class to rb_clear_method_cache_by_class

* class.c, include/ruby/intern.h, variable.c, vm_method.c: add
  rb_clear_constant_cache

* compile.c, vm_core.h, vm_insnhelper.c: rename vmstat field in
  rb_call_info_struct to method_state

* vm_method.c: rename vmstat field in struct cache_entry to method_state

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43455 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* 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