计算性能的程序.txt

Unix下有time程序

#include <windows.h> 
#include <tchar.h> 
#include <string> 
#include <iostream> 
#include <iomanip> 

#ifdef _UNICODE 
std::basic_ostream<wchar_t>& tout = std::wcout; 
std::basic_ostream<wchar_t>& terr = std::wcerr; 
typedef std::basic_string<wchar_t> tstring; 
#else 
std::basic_ostream<char>& tout = std::cout; 
std::basic_ostream<char>& terr = std::cerr; 
typedef std::basic_string<char> tstring; 
#endif 

FILETIME& operator+=(FILETIME& ft1, FILETIME ft2) 
{ 
((ULARGE_INTEGER&)ft1).QuadPart += ((ULARGE_INTEGER&)ft2).QuadPart; 
return ft1; 
} 

FILETIME operator+(FILETIME ft1, FILETIME ft2) 
{ 
FILETIME ft = ft1; 
return ft += ft2; 
} 

FILETIME& operator-=(FILETIME& ft1, FILETIME ft2) 
{ 
((ULARGE_INTEGER&)ft1).QuadPart -= ((ULARGE_INTEGER&)ft2).QuadPart; 
return ft1; 
} 

FILETIME operator-(FILETIME ft1, FILETIME ft2) 
{ 
FILETIME ft = ft1; 
return ft -= ft2; 
} 

std::basic_ostream<TCHAR>& operator<< (std::basic_ostream<TCHAR>& os, 
FILETIME ft) 
{ 
SYSTEMTIME st; 
FileTimeToSystemTime(&ft, &st); 
if(st.wHour) 
os << st.wHour << _TEXT("h"); 
os << st.wMinute << _TEXT("m") << st.wSecond; 
os << _TEXT("."); 
os << std::setw(3) << std::setfill(_TEXT('0')) << st.wMilliseconds; 
os << _TEXT("s"); 
return os; 
} 

void report_error_code(DWORD code) 
{ 
LPVOID lpMsgBuf; 
if (!FormatMessage( 
FORMAT_MESSAGE_ALLOCATE_BUFFER | 
FORMAT_MESSAGE_FROM_SYSTEM | 
FORMAT_MESSAGE_IGNORE_INSERTS, 
NULL, 
code, 
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language 
(LPTSTR) &lpMsgBuf, 
0, 
NULL )) 
{ 
// Handle the error. 
return; 
} 

// Process any inserts in lpMsgBuf. 
// ... 

// Display the string. 
tout << (LPCTSTR)lpMsgBuf << std::endl; 

// Free the buffer. 
LocalFree( lpMsgBuf ); 
} 

int _tmain(int argc, TCHAR** argv) 
{ 
tstring exe_name = argv[0]; 
tstring commandline = GetCommandLine(); 
if(commandline[0]==_TEXT('\"')) 
{ 
commandline.erase(0, 1); 
commandline.erase(0, exe_name.length()); 
commandline.erase(0, 1); 
} 
else 
{ 
commandline.erase(0, exe_name.length()); 
} 
while(_istspace(commandline[0])) 
commandline.erase(0, 1); 
tout << exe_name << _TEXT("\n"); 
tout << commandline << _TEXT("\n"); 

STARTUPINFO si = {sizeof(si)}; 
PROCESS_INFORMATION pi; 
if(CreateProcess(NULL, (LPTSTR)commandline.c_str(), NULL, NULL, FALSE, 0, 
NULL, NULL, &si, &pi)) 
{ 
WaitForSingleObject(pi.hProcess, INFINITE); 
FILETIME ct, et, kt, ut; 
GetProcessTimes(pi.hProcess, &ct, &et, &kt, &ut); 
tout << _TEXT("living time:") << _TEXT("\t") << et-ct << _TEXT("\n"); 
tout << _TEXT("total time:") << _TEXT("\t") << kt+ut << _TEXT("\n"); 
tout << _TEXT("kernel time:") << _TEXT("\t") << kt << _TEXT("\n"); 
tout << _TEXT("user time:") << _TEXT("\t") << ut << _TEXT("\n"); 

CloseHandle(pi.hProcess); 
CloseHandle(pi.hThread); 
return 0; 

} 
else 
{ 
report_error_code(GetLastError()); 
return 1; 
} 

return 0; 
}