From fdc9afd6885a5f50d957e826c8694b72de70673d Mon Sep 17 00:00:00 2001
From: matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sat, 30 Oct 2004 15:33:03 +0000
Subject: * string.c (rb_str_locktmp): lock string temporarily.

* string.c (str_independent): add tmplock check.

* io.c (io_write): lock output string temporarily.
  [ruby-dev:24649]

* io.c (io_write): use rb_str_locktmp().

* io.c (read_all): ditto.


git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_8@7149 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 string.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'string.c')

diff --git a/string.c b/string.c
index 2e5a95562..8a8a0d4e1 100644
--- a/string.c
+++ b/string.c
@@ -27,6 +27,7 @@
 
 VALUE rb_cString;
 
+#define STR_TMPLOCK FL_USER1
 #define STR_ASSOC   FL_USER3
 #define STR_NOCAPA  (ELTS_SHARED|STR_ASSOC)
 
@@ -462,6 +463,9 @@ static int
 str_independent(str)
     VALUE str;
 {
+    if (FL_TEST(str, STR_TMPLOCK)) {
+	rb_raise(rb_eRuntimeError, "can't modify string; temporarily locked");
+    }
     if (OBJ_FROZEN(str)) rb_error_frozen("string");
     if (!OBJ_TAINTED(str) && rb_safe_level() >= 4)
 	rb_raise(rb_eSecurityError, "Insecure: can't modify string");
@@ -632,6 +636,22 @@ rb_str_dup_frozen(str)
     return str;
 }
 
+VALUE
+rb_str_locktmp(str)
+    VALUE str;
+{
+    FL_SET(str, STR_TMPLOCK);
+    return str;
+}
+
+VALUE
+rb_str_unlocktmp(str)
+    VALUE str;
+{
+    FL_UNSET(str, STR_TMPLOCK);
+    return str;
+}
+
 VALUE
 rb_str_resize(str, len)
     VALUE str;
-- 
cgit