Use rb_execution_context_t instead of rb_thread_t

to represent execution context [Feature #14038]

* vm_core.h (rb_thread_t): rb_thread_t::ec is now a pointer.
  There are many code using `th` to represent execution context
  (such as cfp, VM stack and so on). To access `ec`, they need to
  use `th->ec->...` (adding one indirection) so that we need to
  replace them by passing `ec` instead of `th`.

* vm_core.h (GET_EC()): introduced to access current ec. Also
  remove `ruby_current_thread` global variable.

* cont.c (rb_context_t): introduce rb_context_t::thread_ptr instead of
  rb_context_t::thread_value.

* cont.c (ec_set_vm_stack): added to update vm_stack explicitly.

* cont.c (ec_switch): added to switch ec explicitly.

* cont.c (rb_fiber_close): added to terminate fibers explicitly.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60440 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 2 insertions, 2 deletions

diff --git a/process.c b/process.c
index d915478122..ff289435bf 100644
--- a/process.c
+++ b/process.c
@@ -3765,7 +3765,7 @@ rb_f_exit_bang(int argc, VALUE *argv, VALUE obj)
 void
 rb_exit(int status)
 {
-    if (GET_THREAD()->ec.tag) {
+    if (GET_THREAD()->ec->tag) {
 	VALUE args[2];
 
 	args[0] = INT2NUM(status);
@@ -3851,7 +3851,7 @@ rb_f_abort(int argc, const VALUE *argv)
     rb_check_arity(argc, 0, 1);
     if (argc == 0) {
 	rb_thread_t *th = GET_THREAD();
-	VALUE errinfo = th->ec.errinfo;
+	VALUE errinfo = th->ec->errinfo;
 	if (!NIL_P(errinfo)) {
 	    rb_threadptr_error_print(th, errinfo);
 	}