考虑我的日志记录类
void LogWriter::InitLogWriter(void)
{
wcout.flush();
wcerr.flush();
COUT_BACKUP = wcout.rdbuf(); // save original cout buffer
CERR_BACKUP = wcerr.rdbuf(); //save original cerr buffer
FileStreamOpen = false;
switch(m_nTraceLvl)
{
case OffLevel:
StopOutput();
break;
case ErrorLevel:
OutputErrorsToFile(s_TraceFile);
break;
case DetailLevel:
OutputAllToFile(s_TraceFile);
break;
default:
StopOutput();
break;
}
wcout << "Initialize Log Writer" << endl;
}
void LogWriter::OutputAllToFile(TCHAR* fileName)
{
wstreambuf* fb = GetFileBufferStream(fileName);
wcout.rdbuf(fb); // push wcout buffer to file
wcerr.rdbuf(fb); // push cerr buffer to file
FileStreamOpen = true;
}
void LogWriter::OutputErrorsToFile(TCHAR* fileName)
{
wstreambuf* fb = GetFileBufferStream(fileName);
wcerr.rdbuf(fb);
FileStreamOpen = true;
wofstream fout("/dev/null");
wcout.rdbuf(fout.rdbuf()); // redirect 'cout' to a 'fout'
}
void LogWriter::StopOutput(void)
{
wofstream fout("/dev/null");
wcout.rdbuf(fout.rdbuf()); // redirect 'cout' to a 'fout'
wcerr.rdbuf(fout.rdbuf()); // redirect cerr to fout
}
wstreambuf* LogWriter::GetFileBufferStream(TCHAR* fileName)
{
filestr.open(fileName);
return filestr.rdbuf(); // get file's streambuf
}
void LogWriter::Dispose()
{
wcout << "Kill Log Writer" << endl;
wcout.rdbuf(COUT_BACKUP); // restore the original stream buffer
wcerr.rdbuf(CERR_BACKUP);
if(FileStreamOpen)
{
filestr.close();
}
}
现在,如果我将 Tracing 设置为 DetailLevel (2),一切都很好。我所有的日志记录都到文件中。但是如果我选择 OffLevel 或 ErrorLevel 我的程序崩溃.. 我的调试器没有打开所以我添加了 cout << "." 在每一行(我讨厌这样做,但它有效),它指向我
wcout.rdbuf(fout.rdbuf()); // redirect 'cout' to a 'fout'
作为我的罪魁祸首......我首先转向重定向 wcout 并重定向 wcerr 并且它有效(但尚未调用 wcerr)
所以这是我的问题?我应该先处理 wcout 吗?我先尝试冲洗..那没有用..所以我不知道。我究竟做错了什么?
另外作为奖励..为什么在我关闭我的 LogWriter 之前我的所有输出都不会进入文件?IE LogWriter::Dispose()