* eval.c (stack_extend): streamlined rb_thread_restore_context()
	  to ensure O(1) time.  based on a patch by Brent Roman <brent AT
	  mbari.org>.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_7@22544 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	* eval.c (cc_mark): frees the continuation's stack if its thread
	  is dead to avoid recursive gc that segfaults.  [ruby-core:13889]
	  a patch by Brent Roman <brent AT mbari.org>.
	* eval.c (rb_cont_check): checks for valid continuation instance.
	* eval.c (rb_callcc): assigns th->thread before scope_dup() to
	  avoid segfaults if this scope_dup() triggers a gc pass.
	  a patch by Brent Roman <brent AT mbari.org>.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_7@22540 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	* eval.c (rb_thread_schedule): Don't change status of threads which
	  don't run next even if select notify readability/writability.
	  [ruby-core:20446]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_7@22478 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	* eval.c (rb_yield_0): Qundef means no argument.  [ruby-Bugs-22525]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_7@22442 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	* eval.c (load_lock): makes circular require deadlock.
	  [ruby-core:19821]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_7@22205 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	* eval.c (rb_feature_p): returns found feature name if loading.
	  [ruby-core:19798]
	* eval.c (search_required): ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_7@22201 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	* eval.c (rb_mod_modfunc): method undefined in included module
	  may not have nd_body.  [ruby-core:18738]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_7@21857 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	* class.c (clone_method): should copy cbase in cref as well.
	  [ruby-dev:35116]
	* node.h (NEW_CREF): new NEW_ macro.
	* eval.c (PUSH_CREF): use NEW_CREF().


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_7@21585 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	* gc.c (STACK_LEVEL_MAX, ruby_stack_length): returns size_t.
	  [ruby-core:18207]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_7@21524 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

	* eval.c (timeofday): use monotonic clock.  based on a patch
	  from zimbatm <zimbatm@oree.ch> in [ruby-core:16627].


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_7@21359 b2dd03c8-39d4-4d8f-98ff-823fe69b080e