- /**
- * MtVerify.h
- *
- * Error handling for applications in
- * "Multitheading Applications in Win32"
- *
- * The function PrintError() is marked as __inline so that it can be
- * included from one or more C or C++ files without multiple definition
- * errors. For the examples in this book, this works fine.
- * To use the PrintError() in an application, it should be taken out,
- * placed in its own source file, and the "__inline" declaration removed
- * so the function will be globally available.
- */
- #pragma comment( lib, "USER32" )
- #include <stdlib.h>
- #include <crtdbg.h>
- #define MTASSERT(a) _ASSERTE(a)
- // 宏定义 __FILE__ 与__LINE__都是预处理符号提供错误信息的描述
- // 如果a返回FALSE就执行PrintError函数
- #define MTVERIFY(a) if (!(a)) PrintError(#a,__FILE__,__LINE__,GetLastError())
- __inline void PrintError(LPSTR linedesc, LPSTR filename, int lineno, DWORD errnum)
- {
- LPSTR lpBuffer;
- char errbuf[256];
- #ifdef _WINDOWS
- char modulename[MAX_PATH];
- #else // _WINDOWS
- DWORD numread;
- #endif // _WINDOWS
- // 把从GetLastError()返回的错误码转化为错误信息
- FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER
- | FORMAT_MESSAGE_FROM_SYSTEM,
- NULL,
- errnum,
- LANG_NEUTRAL,
- (LPTSTR)&lpBuffer,
- 0,
- NULL );
- wsprintf(errbuf, "/nThe following call failed at line %d in %s:/n/n"
- " %s/n/nReason: %s/n", lineno, filename, linedesc, lpBuffer);
- // 如果是console程序就输出信息到控制台上
- #ifndef _WINDOWS
- WriteFile(GetStdHandle(STD_ERROR_HANDLE), errbuf, strlen(errbuf), &numread, FALSE );
- // 等待3秒钟是为了使用者看到出错信息
- Sleep(3000);
- // 如果是窗口程序就一弹出对话框的形式输出错误信息
- #else
- // 当前exe文件的全路径
- GetModuleFileName(NULL, modulename, MAX_PATH);
- // 置弹出窗口在最上层以免被忽略
- MessageBox(NULL, errbuf, modulename, MB_ICONWARNING|MB_OK|MB_TASKMODAL|MB_SETFOREGROUND);
- #endif
- // 把结束代码EXIT_FAILURE 交给操作系统
- exit(EXIT_FAILURE);
- }