Index: base/scoped_clear_errno.h |
diff --git a/base/scoped_clear_errno.h b/base/scoped_clear_errno.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..7b972fc85ac6fc4b7a1f1d721df0cebd53ca2120 |
--- /dev/null |
+++ b/base/scoped_clear_errno.h |
@@ -0,0 +1,34 @@ |
+// Copyright (c) 2013 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef BASE_SCOPED_CLEAR_ERRNO_H_ |
+#define BASE_SCOPED_CLEAR_ERRNO_H_ |
+ |
+#include <errno.h> |
+ |
+#include "base/basictypes.h" |
+ |
+namespace base { |
+ |
+// Simple scoper that saves the current value of errno, resets it to 0, and on |
+// destruction puts the old value back. |
+class ScopedClearErrno { |
+ public: |
+ ScopedClearErrno() : old_errno_(errno) { |
+ errno = 0; |
+ } |
+ ~ScopedClearErrno() { |
+ if (errno == 0) |
+ errno = old_errno_; |
+ } |
+ |
+ private: |
+ const int old_errno_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(ScopedClearErrno); |
+}; |
+ |
+} // namespace base |
+ |
+#endif // BASE_SCOPED_CLEAR_ERRNO_H_ |