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Side by Side Diff: base/win/wrapped_window_proc.h

Issue 7461141: Rename BASE_API to BASE_EXPORT. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: '' Created 9 years, 4 months ago
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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 // Provides a way to handle exceptions that happen while a WindowProc is 5 // Provides a way to handle exceptions that happen while a WindowProc is
6 // running. The behavior of exceptions generated inside a WindowProc is OS 6 // running. The behavior of exceptions generated inside a WindowProc is OS
7 // dependent, but it is possible that the OS just ignores the exception and 7 // dependent, but it is possible that the OS just ignores the exception and
8 // continues execution, which leads to unpredictable behavior for Chrome. 8 // continues execution, which leads to unpredictable behavior for Chrome.
9 9
10 #ifndef BASE_WIN_WRAPPED_WINDOW_PROC_H_ 10 #ifndef BASE_WIN_WRAPPED_WINDOW_PROC_H_
11 #define BASE_WIN_WRAPPED_WINDOW_PROC_H_ 11 #define BASE_WIN_WRAPPED_WINDOW_PROC_H_
12 #pragma once 12 #pragma once
13 13
14 #include <windows.h> 14 #include <windows.h>
15 15
16 #include "base/base_api.h" 16 #include "base/base_export.h"
17 17
18 namespace base { 18 namespace base {
19 namespace win { 19 namespace win {
20 20
21 // An exception filter for a WindowProc. The return value determines how the 21 // An exception filter for a WindowProc. The return value determines how the
22 // exception should be handled, following standard SEH rules. However, the 22 // exception should be handled, following standard SEH rules. However, the
23 // expected behavior for this function is to not return, instead of returning 23 // expected behavior for this function is to not return, instead of returning
24 // EXCEPTION_EXECUTE_HANDLER or similar, given that in general we are not 24 // EXCEPTION_EXECUTE_HANDLER or similar, given that in general we are not
25 // prepared to handle exceptions. 25 // prepared to handle exceptions.
26 typedef int (__cdecl *WinProcExceptionFilter)(EXCEPTION_POINTERS* info); 26 typedef int (__cdecl *WinProcExceptionFilter)(EXCEPTION_POINTERS* info);
27 27
28 // Sets the filter to deal with exceptions inside a WindowProc. Returns the old 28 // Sets the filter to deal with exceptions inside a WindowProc. Returns the old
29 // exception filter, if any. 29 // exception filter, if any.
30 // This function should be called before any window is created. 30 // This function should be called before any window is created.
31 BASE_API WinProcExceptionFilter SetWinProcExceptionFilter( 31 BASE_EXPORT WinProcExceptionFilter SetWinProcExceptionFilter(
32 WinProcExceptionFilter filter); 32 WinProcExceptionFilter filter);
33 33
34 // Calls the registered exception filter. 34 // Calls the registered exception filter.
35 BASE_API int CallExceptionFilter(EXCEPTION_POINTERS* info); 35 BASE_EXPORT int CallExceptionFilter(EXCEPTION_POINTERS* info);
36 36
37 // Wrapper that supplies a standard exception frame for the provided WindowProc. 37 // Wrapper that supplies a standard exception frame for the provided WindowProc.
38 // The normal usage is something like this: 38 // The normal usage is something like this:
39 // 39 //
40 // LRESULT CALLBACK MyWinProc(HWND hwnd, UINT message, 40 // LRESULT CALLBACK MyWinProc(HWND hwnd, UINT message,
41 // WPARAM wparam, LPARAM lparam) { 41 // WPARAM wparam, LPARAM lparam) {
42 // // Do Something. 42 // // Do Something.
43 // } 43 // }
44 // 44 //
45 // ... 45 // ...
(...skipping 14 matching lines...) Expand all
60 rv = proc(hwnd, message, wparam, lparam); 60 rv = proc(hwnd, message, wparam, lparam);
61 } __except(CallExceptionFilter(GetExceptionInformation())) { 61 } __except(CallExceptionFilter(GetExceptionInformation())) {
62 } 62 }
63 return rv; 63 return rv;
64 } 64 }
65 65
66 } // namespace win 66 } // namespace win
67 } // namespace base 67 } // namespace base
68 68
69 #endif // BASE_WIN_WRAPPED_WINDOW_PROC_H_ 69 #endif // BASE_WIN_WRAPPED_WINDOW_PROC_H_
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