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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef BASE_MAC_SCOPED_NSEXCEPTION_ENABLER_H_ | 5 #ifndef BASE_MAC_SCOPED_NSEXCEPTION_ENABLER_H_ |
6 #define BASE_MAC_SCOPED_NSEXCEPTION_ENABLER_H_ | 6 #define BASE_MAC_SCOPED_NSEXCEPTION_ENABLER_H_ |
7 #pragma once | 7 #pragma once |
8 | 8 |
9 #include "base/base_api.h" | 9 #include "base/base_export.h" |
10 #include "base/basictypes.h" | 10 #include "base/basictypes.h" |
11 | 11 |
12 namespace base { | 12 namespace base { |
13 namespace mac { | 13 namespace mac { |
14 | 14 |
15 // BrowserCrApplication attempts to restrict throwing of NSExceptions | 15 // BrowserCrApplication attempts to restrict throwing of NSExceptions |
16 // because they interact badly with C++ scoping rules. Unfortunately, | 16 // because they interact badly with C++ scoping rules. Unfortunately, |
17 // there are some cases where exceptions must be supported, such as | 17 // there are some cases where exceptions must be supported, such as |
18 // when third-party printer drivers are used. These helpers can be | 18 // when third-party printer drivers are used. These helpers can be |
19 // used to enable exceptions for narrow windows. | 19 // used to enable exceptions for narrow windows. |
20 | 20 |
21 // Make it easy to safely allow NSException to be thrown in a limited | 21 // Make it easy to safely allow NSException to be thrown in a limited |
22 // scope. Note that if an exception is thrown, then this object will | 22 // scope. Note that if an exception is thrown, then this object will |
23 // not be appropriately destructed! If the exception ends up in the | 23 // not be appropriately destructed! If the exception ends up in the |
24 // top-level event loop, things are cleared in -reportException:. If | 24 // top-level event loop, things are cleared in -reportException:. If |
25 // the exception is caught at a lower level, a higher level scoper | 25 // the exception is caught at a lower level, a higher level scoper |
26 // should eventually reset things. | 26 // should eventually reset things. |
27 class BASE_API ScopedNSExceptionEnabler { | 27 class BASE_EXPORT ScopedNSExceptionEnabler { |
28 public: | 28 public: |
29 ScopedNSExceptionEnabler(); | 29 ScopedNSExceptionEnabler(); |
30 ~ScopedNSExceptionEnabler(); | 30 ~ScopedNSExceptionEnabler(); |
31 | 31 |
32 private: | 32 private: |
33 bool was_enabled_; | 33 bool was_enabled_; |
34 | 34 |
35 DISALLOW_COPY_AND_ASSIGN(ScopedNSExceptionEnabler); | 35 DISALLOW_COPY_AND_ASSIGN(ScopedNSExceptionEnabler); |
36 }; | 36 }; |
37 | 37 |
38 // Access the exception setting for the current thread. This is for | 38 // Access the exception setting for the current thread. This is for |
39 // the support code in BrowserCrApplication, other code should use | 39 // the support code in BrowserCrApplication, other code should use |
40 // the scoper. | 40 // the scoper. |
41 BASE_API bool GetNSExceptionsAllowed(); | 41 BASE_EXPORT bool GetNSExceptionsAllowed(); |
42 BASE_API void SetNSExceptionsAllowed(bool allowed); | 42 BASE_EXPORT void SetNSExceptionsAllowed(bool allowed); |
43 | 43 |
44 } // namespace mac | 44 } // namespace mac |
45 } // namespace base | 45 } // namespace base |
46 | 46 |
47 #endif // BASE_MAC_SCOPED_NSEXCEPTION_ENABLER_H_ | 47 #endif // BASE_MAC_SCOPED_NSEXCEPTION_ENABLER_H_ |
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