merges r32345 from trunk into ruby_1_9_2.

--
* thread.c (rb_threadptr_check_signal): only wake up main thread.
* thread.c (rb_threadptr_execute_interrupts_common): check signal
  deliverly if it is main thread.
  fixes [ruby-dev:44005] [Ruby 1.9 - Bug #4950]
* bootstraptest/test_fork.rb: add a test for above.
* signal.c (rb_get_next_signal): skip if signal_buff is empty.
  (check signal_buff.size first)
* vm_core.h: remove unused variable rb_thread_t::exec_signal.
* thread.c (rb_thread_check_trap_pending): check
  rb_signal_buff_size() because rb_thread_t::exec_signal
  is no longer available.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_2@32926 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 0 insertions, 1 deletions

diff --git a/vm_core.h b/vm_core.h
index 0c2b3f4e52..a852eaa133 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -420,7 +420,6 @@ typedef struct rb_thread_struct
 
     VALUE errinfo;
     VALUE thrown_errinfo;
-    int exec_signal;
 
     int interrupt_flag;
     rb_thread_lock_t interrupt_lock;