nobu	2012-02-28 18:47:47 +0900 (Tue, 28 Feb 2012)

  New Revision: 34847

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=34847

  Log:
    * io.c (io_binwrite, rb_io_syswrite): use shared frozen source
      strings.

  Modified files:
    trunk/ChangeLog
    trunk/io.c

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 34846)
+++ ChangeLog	(revision 34847)
@@ -1,5 +1,8 @@
-Tue Feb 28 18:33:30 2012  Nobuyoshi Nakada  <nobu@r...>
+Tue Feb 28 18:47:44 2012  Nobuyoshi Nakada  <nobu@r...>
 
+	* io.c (io_binwrite, rb_io_syswrite): use shared frozen source
+	  strings.
+
 	* io.c (io_fread, io_getpartial, rb_io_sysread): set buffer size
 	  after check if readable, which can cause thread switch.
 	  [ruby-dev:45297][Bug #6099]
Index: io.c
===================================================================
--- io.c	(revision 34846)
+++ io.c	(revision 34847)
@@ -1243,6 +1243,8 @@
     io = tmp;
     if (RSTRING_LEN(str) == 0) return INT2FIX(0);
 
+    str = rb_str_new_frozen(str);
+
     GetOpenFile(io, fptr);
     rb_io_check_writable(fptr);
 
@@ -4219,6 +4221,8 @@
     GetOpenFile(io, fptr);
     rb_io_check_writable(fptr);
 
+    str = rb_str_new_frozen(str);
+
     if (fptr->wbuf.len) {
 	rb_warn("syswrite for buffered IO");
     }

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