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* cont.c : Introdule ensure rollback mechanism. Please see below.

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* internal.h (ruby_register_rollback_func_for_ensure): catch up above change.
	  Add rollback mechanism API.

	* vm_core.h (typedef struct rb_vm_struct): catch up above change.
	  Introdule ensure-rollback relation table.

	* vm_core.h (typedef struct rb_thread_struct): catch up above change.
	  Introdule ensure stack.

	* eval.c (rb_ensure): catch up above change.
	  Introdule ensure stack.

	* hash.c : New function for rollback ensure, and register it to
	  ensure-rollback relation table. [ruby-dev:47803] [Bug #9105]

	Ensure Rollback Mechanism:
	A rollback's function is a function to rollback a state before ensure's
	function execution.
	When the jump of callcc is across the scope of rb_ensure,
	ensure's functions and rollback's functions are executed appropriately
	for keeping consistency.

	Current API is unstable, and only internal use.

	ruby_register_rollback_func_for_ensure(ensure_func,rollback_func)
	This API create relation ensure's function to rollback's function.
	By registered rollback's function, it is executed When jumpping into
	corresponding rb_ensure scope.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43688 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
tarui 2013-11-15 17:15:31 +00:00
parent 9e96b1edea
commit 28a1c4f33e
6 changed files with 166 additions and 2 deletions
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internal.h
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@ -342,6 +342,7 @@ VALUE rb_insns_name_array(void);
/* cont.c */
VALUE rb_obj_is_fiber(VALUE);
void rb_fiber_reset_root_local_storage(VALUE);
void ruby_register_rollback_func_for_ensure(VALUE (*ensure_func)(ANYARGS), VALUE (*rollback_func)(ANYARGS));
/* debug.c */
PRINTF_ARGS(void ruby_debug_printf(const char*, ...), 1, 2);