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, 5 insertions, 5 deletions

diff --git a/vm_exec.c b/vm_exec.c
index 9537687da4..004265fbbb 100644
--- a/vm_exec.c
+++ b/vm_exec.c
@@ -84,7 +84,7 @@ vm_exec_core(rb_thread_t *th, VALUE initial)
 #undef  RESTORE_REGS
 #define RESTORE_REGS() \
 { \
-  VM_REG_CFP = th->ec.cfp; \
+  VM_REG_CFP = th->ec->cfp; \
   reg_pc  = reg_cfp->pc; \
 }
 
@@ -102,7 +102,7 @@ vm_exec_core(rb_thread_t *th, VALUE initial)
 	return (VALUE)insns_address_table;
     }
 #endif
-    reg_cfp = th->ec.cfp;
+    reg_cfp = th->ec->cfp;
     reg_pc = reg_cfp->pc;
 
 #if OPT_STACK_CACHING
@@ -142,7 +142,7 @@ rb_vm_get_insns_address_table(void)
 static VALUE
 vm_exec_core(rb_thread_t *th, VALUE initial)
 {
-    register rb_control_frame_t *reg_cfp = th->ec.cfp;
+    register rb_control_frame_t *reg_cfp = th->ec->cfp;
 
     while (1) {
 	reg_cfp = ((rb_insn_func_t) (*GET_PC()))(th, reg_cfp);
@@ -158,8 +158,8 @@ vm_exec_core(rb_thread_t *th, VALUE initial)
 	return ret;
     }
     else {
-	VALUE err = th->ec.errinfo;
-	th->ec.errinfo = Qnil;
+	VALUE err = th->ec->errinfo;
+	th->ec->errinfo = Qnil;
 	return err;
     }
 }