nobu	2015-09-06 11:04:40 +0900 (Sun, 06 Sep 2015)

  New Revision: 51774

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=51774

  Log:
    thread.c: suppress warnings
    
    * thread.c (do_select): suppress maybe-uninitialized warnings on
      maxfd.

  Modified files:
    trunk/thread.c
Index: thread.c
===================================================================
--- thread.c	(revision 51773)
+++ thread.c	(revision 51774)
@@ -3392,6 +3392,8 @@ rb_fd_select(int n, rb_fdset_t *readfds, https://github.com/ruby/ruby/blob/trunk/thread.c#L3392
     return select(n, r, w, e, timeout);
 }
 
+#define rb_fd_no_init(fds) ASSUME(!(fds)->maxfd)
+
 #undef FD_ZERO
 #undef FD_SET
 #undef FD_CLR
@@ -3457,6 +3459,10 @@ rb_fd_set(int fd, rb_fdset_t *set) https://github.com/ruby/ruby/blob/trunk/thread.c#L3459
 
 #endif
 
+#ifndef rb_fd_no_init
+#define rb_fd_no_init(fds) (void)(fds)
+#endif
+
 static inline int
 retryable(int e)
 {
@@ -3510,12 +3516,12 @@ do_select(int n, rb_fdset_t *readfds, rb https://github.com/ruby/ruby/blob/trunk/thread.c#L3516
 	timeout = &wait_rest;
     }
 
-    if (readfds)
-	rb_fd_init_copy(&orig_read, readfds);
-    if (writefds)
-	rb_fd_init_copy(&orig_write, writefds);
-    if (exceptfds)
-	rb_fd_init_copy(&orig_except, exceptfds);
+#define fd_init_copy(f) \
+    (f##fds) ? rb_fd_init_copy(&orig_##f, f##fds) : rb_fd_no_init(&orig_##f)
+    fd_init_copy(read);
+    fd_init_copy(write);
+    fd_init_copy(except);
+#undef fd_init_copy
 
     do {
 	lerrno = 0;
@@ -3529,12 +3535,11 @@ do_select(int n, rb_fdset_t *readfds, rb https://github.com/ruby/ruby/blob/trunk/thread.c#L3535
 	RUBY_VM_CHECK_INTS_BLOCKING(th);
     } while (result < 0 && retryable(errno = lerrno) && do_select_update());
 
-    if (readfds)
-	rb_fd_term(&orig_read);
-    if (writefds)
-	rb_fd_term(&orig_write);
-    if (exceptfds)
-	rb_fd_term(&orig_except);
+#define fd_term(f) if (f##fds) rb_fd_term(&orig_##f)
+    fd_term(read);
+    fd_term(write);
+    fd_term(except);
+#undef fd_term
 
     return result;
 }

--
ML: ruby-changes@q...
Info: http://www.atdot.net/~ko1/quickml/