Ruby

• thread.c (rb_thread_s_control_interrupt,
  rb_thread_s_check_interrupt): added for
  Thread.control_intgerrupt and Thread.check_interrupt.
  See details on rdoc.
  I'll make an ticket for this feature.
• test/ruby/test_thread.rb: add a test for Thread.control_intgerrupt.
• thread.c (rb_threadptr_raise): make a new exception object
  even if argc is 0.
• thread.c (rb_thread_kill): kill thread immediately if target thread
  is current thread.
• vm_core.h (RUBY_VM_CHECK_INTS_BLOCKING): added.
  CHECK_INTS while/after blocking operation.
• vm_core.h (RUBY_VM_CHECK_INTS): require rb_thread_t ptr.
• cont.c (fiber_switch): use replaced RUBY_VM_CHECK_INTS().
• eval.c (ruby_cleanup): ditto.
• insns.def: ditto.
• process.c (rb_waitpid): ditto.
• vm_eval.c (vm_call0): ditto.
• vm_insnhelper.c (vm_call_method): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@36470 b2dd03c8-39d4-4d8f-98ff-823fe69b080e