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, 6 insertions, 6 deletions

diff --git a/safe.c b/safe.c
index 2e1ac8b529..d1368d7f5f 100644
--- a/safe.c
+++ b/safe.c
@@ -34,13 +34,13 @@ ruby_safe_level_2_warning(void)
 int
 rb_safe_level(void)
 {
-    return GET_THREAD()->ec.safe_level;
+    return GET_THREAD()->ec->safe_level;
 }
 
 void
 rb_set_safe_level_force(int safe)
 {
-    GET_THREAD()->ec.safe_level = safe;
+    GET_THREAD()->ec->safe_level = safe;
 }
 
 void
@@ -48,11 +48,11 @@ rb_set_safe_level(int level)
 {
     rb_thread_t *th = GET_THREAD();
 
-    if (level > th->ec.safe_level) {
+    if (level > th->ec->safe_level) {
 	if (level > SAFE_LEVEL_MAX) {
 	    rb_raise(rb_eArgError, "$SAFE=2 to 4 are obsolete");
 	}
-	th->ec.safe_level = level;
+	th->ec->safe_level = level;
     }
 }
 
@@ -66,7 +66,7 @@ static void
 safe_setter(VALUE val)
 {
     rb_thread_t *th = GET_THREAD();
-    int current_level = th->ec.safe_level;
+    int current_level = th->ec->safe_level;
     int level = NUM2INT(val);
 
     if (level == current_level) {
@@ -84,7 +84,7 @@ safe_setter(VALUE val)
     /* block parameters */
     rb_vm_stack_to_heap(th);
 
-    th->ec.safe_level = level;
+    th->ec->safe_level = level;
 }
 
 void