merge revision(s) 57477,57478,57479: [Backport #12405]

use TRUE/FALSE.

	define rb_thread_sleep_deadly_allow_spurious_wakeup().

	* thread.c, thread_sync.c: define new function
	  rb_thread_sleep_deadly_allow_spurious_wakeup() and use it instead of
	  using sleep_forever() directly.

	allow Queue operation in trap.

	* thread_sync.c: allow spurious wakeup to check Queue status just after trap.
	  [Bug #12405]

	* test/thread/test_queue.rb: add a test for it.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@57879 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/thread/test_queue.rb

@@ -547,4 +547,21 @@ class TestQueue < Test::Unit::TestCase
     # don't leak this thread
     assert_nothing_raised{counter.join}
   end
+
+  def test_queue_with_trap
+    assert_in_out_err([], <<-INPUT, %w(USR2 USR2 exit), [])
+      q = Queue.new
+      trap(:USR2){
+        q.push 'USR2'
+      }
+      Thread.new{
+        loop{
+          Process.kill :USR2, $$
+        }
+      }
+      puts q.pop
+      puts q.pop
+      puts 'exit'
+    INPUT
+  end
 end

thread.c

@@ -85,6 +85,7 @@ static ID id_locals;
 static void sleep_timeval(rb_thread_t *th, struct timeval time, int spurious_check);
 static void sleep_wait_for_interrupt(rb_thread_t *th, double sleepsec, int spurious_check);
 static void sleep_forever(rb_thread_t *th, int nodeadlock, int spurious_check);
+static void rb_thread_sleep_deadly_allow_spurious_wakeup(void);
 static double timeofday(void);
 static int rb_threadptr_dead(rb_thread_t *th);
 static void rb_check_deadlock(rb_vm_t *vm);
@@ -845,7 +846,7 @@ thread_join_sleep(VALUE arg)
 
     while (target_th->status != THREAD_KILLED) {
 	if (forever) {
-	    sleep_forever(th, 1, 0);
+	    sleep_forever(th, TRUE, FALSE);
 	}
 	else {
 	    double now = timeofday();
@@ -1136,14 +1137,21 @@ void
 rb_thread_sleep_forever(void)
 {
     thread_debug("rb_thread_sleep_forever\n");
-    sleep_forever(GET_THREAD(), 0, 1);
+    sleep_forever(GET_THREAD(), FALSE, TRUE);
 }
 
 void
 rb_thread_sleep_deadly(void)
 {
     thread_debug("rb_thread_sleep_deadly\n");
-    sleep_forever(GET_THREAD(), 1, 1);
+    sleep_forever(GET_THREAD(), TRUE, TRUE);
+}
+
+static void
+rb_thread_sleep_deadly_allow_spurious_wakeup(void)
+{
+    thread_debug("rb_thread_sleep_deadly_allow_spurious_wakeup\n");
+    sleep_forever(GET_THREAD(), TRUE, FALSE);
 }
 
 static double

thread_sync.c

@@ -420,7 +420,7 @@ rb_mutex_abandon_all(rb_mutex_t *mutexes)
 static VALUE
 rb_mutex_sleep_forever(VALUE time)
 {
-    sleep_forever(GET_THREAD(), 1, 0); /* permit spurious check */
+    rb_thread_sleep_deadly_allow_spurious_wakeup();
     return Qnil;
 }
 
@@ -773,7 +773,7 @@ queue_delete_from_waiting(struct waiting_delete *p)
 static VALUE
 queue_sleep(VALUE arg)
 {
-    rb_thread_sleep_deadly();
+    rb_thread_sleep_deadly_allow_spurious_wakeup();
     return Qnil;
 }
 

version.h

@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.4.0"
 #define RUBY_RELEASE_DATE "2017-03-12"
-#define RUBY_PATCHLEVEL 44
+#define RUBY_PATCHLEVEL 45
 
 #define RUBY_RELEASE_YEAR 2017
 #define RUBY_RELEASE_MONTH 3