Index: base/mac/scoped_nsexception_enabler.h |
diff --git a/base/mac/scoped_nsexception_enabler.h b/base/mac/scoped_nsexception_enabler.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..d89131c03aa28d30751978bb21dfdc8549e0582d |
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+++ b/base/mac/scoped_nsexception_enabler.h |
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+// Copyright (c) 2011 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_MAC_SCOPED_NSEXCEPTION_ENABLER_H_ |
+#define BASE_MAC_SCOPED_NSEXCEPTION_ENABLER_H_ |
+#pragma once |
+ |
+#include "base/basictypes.h" |
+ |
+namespace base { |
+namespace mac { |
+ |
+// ChromeBrowserApplication attempts to restrict throwing of |
+// NSExceptions because they interact badly with C++ scoping rules. |
+// Unfortunately, there are some cases where exceptions must be |
+// supported, such as when third-party printer drivers are used. |
+// These helpers can be used to enable exceptions for narrow windows. |
+ |
+// Make it easy to safely allow NSException to be throw in a limited |
+// scope. Note that if an exception is throw, then this object will |
+// not be appropriately destructed! If the exception ends up in the |
+// top-level event loop, things are cleared in -reportException:. If |
+// the exception is caught at a lower level, a higher level scoper |
+// should eventually reset things. |
+class ScopedNSExceptionEnabler { |
+ public: |
+ // Passing |true| enables exceptions within this scope, passing |
+ // |false| leaves the current setting alone. This allows optionally |
+ // enabling exceptions without requiring contrived code (like using |
+ // |scoped_ptr<ScopedNSExceptionEnabler>|). |
+ ScopedNSExceptionEnabler(bool enable); |
Mark Mentovai
2011/05/17 19:07:34
Mark this “explicit.”
|
+ ~ScopedNSExceptionEnabler(); |
+ |
+ private: |
+ bool was_enabled_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(ScopedNSExceptionEnabler); |
+}; |
+ |
+// Access the exception setting for the current thread. This is for |
+// the support code in ChromeBrowserApplication, other code should use |
+// the scoper. |
+bool GetNSExceptionsAllowed(); |
+void SetNSExceptionsAllowed(bool allowed); |
+ |
+} // namespace mac |
+} // namespace base |
+ |
+#endif BASE_MAC_SCOPED_NSEXCEPTION_ENABLER_H_ |