| // Copyright (c) 2017 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <windows.h> |
| |
| #include <stdio.h> |
| #include <tchar.h> |
| |
| #include <algorithm> |
| #include <iostream> |
| #include <sstream> |
| #include <string> |
| |
| #include "base/win/shlwapi.h" |
| |
| #pragma warning(disable : 4996) |
| |
| // Create |count| number of temp files at |folder_path| using GUID based method. |
| // The time cost in millisecond of creating every 500 temp files or all the |
| // files if |count| < 500 is printed to the console. |
| bool CreateFilesUsingGuid(UINT count, const char* folder_path); |
| |
| // Create |count| number of temp files at |folder_path| using GetTempFileName() |
| // API. The time cost in millisecond of creating every 500 temp files or all the |
| // files if |count| < 500 is printed to the console. |
| bool CreateFilesUsingGetTempFileName(UINT count, const char* folder_path); |
| |
| // This method converts GUID to a string. |
| char* ConvertGuidToString(const GUID* id, char* out); |
| |
| // If |folder_path| doesn't exist, creat it, otherwise check if it is empty. |
| bool CreateOrValidateTempDirectory(const char* folder_path); |
| |
| // Deletes all the content in |folder_path|. |
| void DeleteDirectoryContent(const char* folder_path); |
| |
| // Deletes |folder_path| including its contents and the raw directory. |
| bool DeleteDirectory(const char* folder_path); |
| |
| // Deletes |folder_path| including its contents and the raw directory, and print |
| // the delete status to the console. |
| void DeleteDirectoryAndPrintMsg(const char* folder_path); |
| |
| // Prints the elapsed time at current step for the latest cycle. |
| void FormatPrintElapsedTime(UINT cur_step, |
| UINT total_step, |
| const LARGE_INTEGER& elapsed_ms); |
| |
| // Maximum number of temp files allowed to create. This is limited by the |
| // implementation of GetTempFileName(). |
| // "This limits GetTempFileName to a maximum of 65,535 unique file names if the |
| // lpPathName and lpPrefixString parameters remain the same." |
| // https://msdn.microsoft.com/en-us/library/windows/desktop/aa364991(v=vs.85).aspx |
| UINT kMaxFileCreate = 65535; |
| |
| // Query the time cost each time when this amount of temp files are created. |
| UINT kFileCountPerMetric = 500; |
| |
| int main() { |
| // Gets the temp path env string. |
| DWORD temp_path_ret = 0; |
| CHAR temp_folder_path[MAX_PATH]; |
| temp_path_ret = ::GetTempPathA(MAX_PATH, temp_folder_path); |
| if (temp_path_ret > MAX_PATH || temp_path_ret == 0) { |
| std::cout << "GetTempPath failed" << std::endl; |
| return 0; |
| } |
| |
| // A temporary directory where the new temp files created by GetTempFileName() |
| // are written. |
| std::string temp_dir_gettempfilename( |
| std::string(temp_folder_path).append("TempDirGetTempFileName\\")); |
| |
| // A temporary directory where the new temp files created by Guid-based method |
| // are written. |
| std::string temp_dir_guid( |
| std::string(temp_folder_path).append("TempDirGuid\\")); |
| |
| UINT file_create_count; |
| std::string user_input; |
| |
| while (true) { |
| std::cout << "\nPlease enter # of files to create (maximum " |
| << kMaxFileCreate << "), or \"quit\" to end the program : "; |
| std::getline(std::cin, user_input); |
| |
| std::transform(user_input.begin(), user_input.end(), user_input.begin(), |
| ::tolower); |
| if (user_input == "quit") |
| break; |
| |
| std::cout << std::endl; |
| std::stringstream ss(user_input); |
| |
| if (ss >> file_create_count && file_create_count <= kMaxFileCreate) { |
| std::cout << "\nPlease select method to create temp file names,\n" |
| << "\"t\" for GetTempFileName \n" |
| << "\"g\" for GUID-based \n" |
| << "\"b\" for both \n" |
| << "or \"quit\" to end the program : "; |
| std::getline(std::cin, user_input); |
| |
| std::transform(user_input.begin(), user_input.end(), user_input.begin(), |
| ::tolower); |
| if (user_input == "quit") |
| break; |
| |
| if (user_input == "t" || user_input == "b") { |
| std::cout << "\nGetTempFileName Performance:\n [start - end] / total " |
| "--- time " |
| "cost in ms" |
| << std::endl; |
| if (CreateFilesUsingGetTempFileName(file_create_count, |
| temp_dir_gettempfilename.c_str())) { |
| std::cout << "File creation succeeds at " << temp_dir_gettempfilename |
| << ", now clean all of them!" << std::endl; |
| } |
| DeleteDirectoryAndPrintMsg(temp_dir_gettempfilename.c_str()); |
| } |
| |
| if (user_input == "g" || user_input == "b") { |
| std::cout << "\nGUID-based Performance:\n [start - end] / total --- " |
| "time cost in ms" |
| << std::endl; |
| if (CreateFilesUsingGuid(file_create_count, temp_dir_guid.c_str())) { |
| std::cout << "File creation succeeds at " << temp_dir_guid |
| << ", now clean all of them!" << std::endl; |
| } |
| DeleteDirectoryAndPrintMsg(temp_dir_guid.c_str()); |
| } |
| } else { |
| std::cout << "Input number is invalid, please enter # of files to create " |
| "(maximum " |
| << kMaxFileCreate << "), or \"quit\" to end the program : "; |
| } |
| std::cout << std::endl; |
| } |
| return 0; |
| } |
| |
| bool CreateFilesUsingGuid(UINT count, const char* dir_path) { |
| if (!CreateOrValidateTempDirectory(dir_path)) |
| return false; |
| |
| LARGE_INTEGER starting_time, ending_time, elapsed_ms; |
| ::QueryPerformanceCounter(&starting_time); |
| LARGE_INTEGER frequency; |
| ::QueryPerformanceFrequency(&frequency); |
| |
| for (UINT i = 1; i <= count; ++i) { |
| GUID guid; |
| ::CoCreateGuid(&guid); |
| char buffer[37]; |
| ConvertGuidToString(&guid, buffer); |
| std::string temp_name = std::string(dir_path).append(buffer).append(".tmp"); |
| |
| HANDLE file_handle = |
| ::CreateFileA(temp_name.c_str(), GENERIC_READ, FILE_SHARE_READ, NULL, |
| CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); |
| ::CloseHandle(file_handle); |
| |
| if (i % kFileCountPerMetric == 0 || i == count) { |
| ::QueryPerformanceCounter(&ending_time); |
| // Convert the elapsed number of ticks to milliseconds. |
| elapsed_ms.QuadPart = (ending_time.QuadPart - starting_time.QuadPart) * |
| 1000 / frequency.QuadPart; |
| |
| FormatPrintElapsedTime(i, count, elapsed_ms); |
| |
| ::QueryPerformanceCounter(&starting_time); |
| } |
| } |
| return true; |
| } |
| |
| bool CreateFilesUsingGetTempFileName(UINT count, const char* dir_path) { |
| if (!CreateOrValidateTempDirectory(dir_path)) |
| return false; |
| |
| CHAR temp_name[MAX_PATH]; |
| LARGE_INTEGER starting_time, ending_time, elapsed_ms; |
| ::QueryPerformanceCounter(&starting_time); |
| LARGE_INTEGER frequency; |
| ::QueryPerformanceFrequency(&frequency); |
| |
| for (UINT i = 1; i <= count; ++i) { |
| ::GetTempFileNameA(dir_path, "", 0, temp_name); |
| if (i % kFileCountPerMetric == 0 || i == count) { |
| ::QueryPerformanceCounter(&ending_time); |
| // Convert the elapsed number of ticks to milliseconds. |
| elapsed_ms.QuadPart = (ending_time.QuadPart - starting_time.QuadPart) * |
| 1000 / frequency.QuadPart; |
| |
| FormatPrintElapsedTime(i, count, elapsed_ms); |
| |
| ::QueryPerformanceCounter(&starting_time); |
| } |
| } |
| return true; |
| } |
| |
| char* ConvertGuidToString(const GUID* id, char* out) { |
| int i; |
| char* ret = out; |
| out += sprintf(out, "%.8lX-%.4hX-%.4hX-", id->Data1, id->Data2, id->Data3); |
| for (i = 0; i < sizeof(id->Data4); ++i) { |
| out += sprintf(out, "%.2hhX", id->Data4[i]); |
| if (i == 1) |
| *(out++) = '-'; |
| } |
| return ret; |
| } |
| |
| bool CreateOrValidateTempDirectory(const char* folder_path) { |
| if (::PathFileExistsA(folder_path)) { |
| if (!::PathIsDirectoryEmptyA(folder_path)) { |
| std::cout << folder_path |
| << " directory is not empty, please remove all its content."; |
| return false; |
| } |
| return true; |
| } else if (::CreateDirectoryA(folder_path, NULL) == 0) { |
| std::cout << folder_path << "directory creation fails."; |
| return false; |
| } else { |
| return true; |
| } |
| } |
| |
| void DeleteDirectoryContent(const char* folder_path) { |
| char file_found[MAX_PATH]; |
| WIN32_FIND_DATAA info; |
| HANDLE hp; |
| sprintf(file_found, "%s\\*.*", folder_path); |
| hp = ::FindFirstFileA(file_found, &info); |
| do { |
| if ((strcmp(info.cFileName, ".") == 0) || |
| (strcmp(info.cFileName, "..") == 0)) { |
| continue; |
| } |
| sprintf(file_found, "%s\\%s", folder_path, info.cFileName); |
| ::DeleteFileA(file_found); |
| } while (::FindNextFileA(hp, &info)); |
| ::FindClose(hp); |
| } |
| |
| bool DeleteDirectory(const char* folder_path) { |
| DeleteDirectoryContent(folder_path); |
| return ::RemoveDirectoryA(folder_path) != 0; |
| } |
| |
| void DeleteDirectoryAndPrintMsg(const char* folder_path) { |
| if (DeleteDirectory(folder_path)) { |
| std::cout << folder_path << " directory is deleted!" << std::endl; |
| } else { |
| std::cout << "[Attention] " << folder_path |
| << " directory's deletion fails, please take a look by yourself!" |
| << std::endl; |
| } |
| } |
| |
| void FormatPrintElapsedTime(UINT cur_step, |
| UINT total_step, |
| const LARGE_INTEGER& elapsed_ms) { |
| UINT count_prev = 0; |
| if (cur_step % kFileCountPerMetric == 0) |
| count_prev = cur_step + 1 - kFileCountPerMetric; |
| else if (cur_step > kFileCountPerMetric) |
| count_prev = cur_step / kFileCountPerMetric * kFileCountPerMetric + 1; |
| printf(" [%5d - %5d] / %d --- %lld\n", count_prev, cur_step, total_step, |
| elapsed_ms.QuadPart); |
| } |