| // Copyright (C) 2004 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 2, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING. If not, write to the Free |
| // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
| // USA. |
| |
| // As a special exception, you may use this file as part of a free software |
| // library without restriction. Specifically, if other files instantiate |
| // templates or use macros or inline functions from this file, or you compile |
| // this file and link it with other files to produce an executable, this |
| // file does not by itself cause the resulting executable to be covered by |
| // the GNU General Public License. This exception does not however |
| // invalidate any other reasons why the executable file might be covered by |
| // the GNU General Public License. |
| |
| #include <cstdio> |
| #include <fstream> |
| #include <testsuite_performance.h> |
| |
| // libstdc++/11722 |
| int main() |
| { |
| using namespace std; |
| using namespace __gnu_test; |
| |
| time_counter time; |
| resource_counter resource; |
| |
| const int iterations = 500000; |
| const int chunksize = 100; |
| |
| char* chunk = new char[chunksize]; |
| const char* name1 = "/usr/share/dict/words"; |
| const char* name2 = "/usr/share/dict/linux.words"; |
| const char* name = name1; |
| |
| // C |
| FILE* file; |
| if (!(file = fopen(name, "r"))) |
| { |
| name = name2; |
| if (!(file = fopen(name, "r"))) |
| exit(1); |
| } |
| setvbuf(file, 0, _IONBF, 0); |
| start_counters(time, resource); |
| for (int i = 0; i < iterations; ++i) |
| if (fread(chunk, 1, chunksize, file) < chunksize) |
| fseek(file, 0, SEEK_SET); |
| stop_counters(time, resource); |
| fclose(file); |
| report_performance(__FILE__, "C", time, resource); |
| clear_counters(time, resource); |
| |
| // C unlocked |
| file = fopen(name, "r"); |
| setvbuf(file, 0, _IONBF, 0); |
| start_counters(time, resource); |
| for (int i = 0; i < iterations; ++i) |
| if (fread_unlocked(chunk, 1, chunksize, file) < chunksize) |
| fseek(file, 0, SEEK_SET); |
| stop_counters(time, resource); |
| fclose(file); |
| report_performance(__FILE__, "C unlocked", time, resource); |
| clear_counters(time, resource); |
| |
| // C++ |
| filebuf buf; |
| buf.pubsetbuf(0, 0); |
| buf.open(name, ios_base::in); |
| start_counters(time, resource); |
| for (int i = 0; i < iterations; ++i) |
| if (buf.sgetn(chunk, chunksize) < chunksize) |
| buf.pubseekoff(0, ios::beg); |
| stop_counters(time, resource); |
| report_performance(__FILE__, "C++", time, resource); |
| |
| delete [] chunk; |
| |
| return 0; |
| } |