void DisplayMessageQueue_Win32::allow_exceptions()
{
if (moduleKernel32 == 0)
{
// See http://support.microsoft.com/kb/976038
// Required for exceptions and access violations not to be caught by DispatchMessage.
moduleKernel32 = LoadLibrary(L"kernel32.dll");
ptrSetProcessUserModeExceptionPolicy = (FuncSetProcessUserModeExceptionPolicy *)GetProcAddress(moduleKernel32, "SetProcessUserModeExceptionPolicy");
ptrGetProcessUserModeExceptionPolicy = (FuncGetProcessUserModeExceptionPolicy *)GetProcAddress(moduleKernel32, "GetProcessUserModeExceptionPolicy");
if (ptrSetProcessUserModeExceptionPolicy && ptrGetProcessUserModeExceptionPolicy)
{
DWORD flags = 0;
if (ptrGetProcessUserModeExceptionPolicy(&flags))
ptrSetProcessUserModeExceptionPolicy(flags & ~WIN32_PROCESS_CALLBACK_FILTER_ENABLED);
}
}
}
void CL_DisplayMessageQueue_Win32::process_message()
{
// We must use PeekMessage instead of GetMessage because GetMessage can
// block even when MsgWaitForMultipleObjects reported messages to be
// available. This can happen because SendMessage between threads and
// internal system events are processed when GetMessage and PeekMessage
// are called and such messages are processed directly and not returned
// by PeekMessage/GetMessage. A call to GetMessage may therefore block
// until a message intended for us arrives.
//
// PeekMessage+PM_REMOVE equals to a non-blocking GetMessage call.
if (moduleKernel32 == 0)
{
// See http://support.microsoft.com/kb/976038
// Required for exceptions and access violations not to be caught by DispatchMessage.
moduleKernel32 = LoadLibrary(L"kernel32.dll");
ptrSetProcessUserModeExceptionPolicy = (FuncSetProcessUserModeExceptionPolicy *)GetProcAddress(moduleKernel32, "SetProcessUserModeExceptionPolicy");
ptrGetProcessUserModeExceptionPolicy = (FuncGetProcessUserModeExceptionPolicy *)GetProcAddress(moduleKernel32, "GetProcessUserModeExceptionPolicy");
if (ptrSetProcessUserModeExceptionPolicy && ptrGetProcessUserModeExceptionPolicy)
{
DWORD flags = 0;
if (ptrGetProcessUserModeExceptionPolicy(&flags))
ptrSetProcessUserModeExceptionPolicy(flags & ~WIN32_PROCESS_CALLBACK_FILTER_ENABLED);
}
}
MSG msg;
memset(&msg, 0, sizeof(MSG));
BOOL result = PeekMessage(&msg, 0, 0, 0, PM_REMOVE);
if (result)
DispatchMessage(&msg);
CL_SharedPtr<ThreadData> data = get_thread_data();
for (std::vector<CL_Win32Window *>::size_type i = 0; i < data->windows.size(); i++)
{
CL_InputContext context = data->windows[i]->get_ic();
context.process_messages();
}
}
