base/win/wrapped_window_proc.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/win/wrapped_window_proc.h"
   6
   7 #include "base/atomicops.h"
   8 #include "base/logging.h"
   9 #include "base/process/memory.h"
  10
  11 namespace {
  12
  13 base::win::WinProcExceptionFilter s_exception_filter = NULL;
  14
  15 }  // namespace.
  16
  17 namespace base {
  18 namespace win {
  19
  20 WinProcExceptionFilter SetWinProcExceptionFilter(
  21     WinProcExceptionFilter filter) {
  22   subtle::AtomicWord rv = subtle::NoBarrier_AtomicExchange(
  23       reinterpret_cast<subtle::AtomicWord*>(&s_exception_filter),
  24       reinterpret_cast<subtle::AtomicWord>(filter));
  25   return reinterpret_cast<WinProcExceptionFilter>(rv);
  26 }
  27
  28 int CallExceptionFilter(EXCEPTION_POINTERS* info) {
  29   return s_exception_filter ? s_exception_filter(info) :
  30                               EXCEPTION_CONTINUE_SEARCH;
  31 }
  32
  33 BASE_EXPORT void InitializeWindowClass(
  34     const char16* class_name,
  35     WNDPROC window_proc,
  36     UINT style,
  37     int class_extra,
  38     int window_extra,
  39     HCURSOR cursor,
  40     HBRUSH background,
  41     const char16* menu_name,
  42     HICON large_icon,
  43     HICON small_icon,
  44     WNDCLASSEX* class_out) {
  45   class_out->cbSize = sizeof(WNDCLASSEX);
  46   class_out->style = style;
  47   class_out->lpfnWndProc = window_proc;
  48   class_out->cbClsExtra = class_extra;
  49   class_out->cbWndExtra = window_extra;
  50   class_out->hInstance = base::GetModuleFromAddress(window_proc);
  51   class_out->hIcon = large_icon;
  52   class_out->hCursor = cursor;
  53   class_out->hbrBackground = background;
  54   class_out->lpszMenuName = menu_name;
  55   class_out->lpszClassName = class_name;
  56   class_out->hIconSm = small_icon;
  57
  58   // Check if |window_proc| is valid.
  59   DCHECK(class_out->hInstance != NULL);
  60 }
  61
  62 }  // namespace win
  63 }  // namespace base