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[/] [openrisc/] [tags/] [gnu-dev/] [fsf-gcc-snapshot-1-mar-12/] [or1k-gcc/] [libstdc++-v3/] [testsuite/] [performance/] [27_io/] [filebuf_sputn_unbuf.cc] - Rev 783
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// Copyright (C) 2004, 2009, 2011 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 3, 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 COPYING3. If not see // <http://www.gnu.org/licenses/>. #include <unistd.h> #include <cstdio> #include <fstream> #include <testsuite_performance.h> // libstdc++/11378 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]; // C FILE* file = fopen("tmp", "w+"); setvbuf(file, 0, _IONBF, 0); start_counters(time, resource); for (int i = 0; i < iterations; ++i) fwrite(chunk, 1, chunksize, file); stop_counters(time, resource); fclose(file); report_performance(__FILE__, "C", time, resource); clear_counters(time, resource); // C unlocked file = fopen("tmp", "w+"); setvbuf(file, 0, _IONBF, 0); start_counters(time, resource); for (int i = 0; i < iterations; ++i) fwrite_unlocked(chunk, 1, chunksize, file); 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("tmp", ios_base::out | ios_base::in | ios_base::trunc); start_counters(time, resource); for (int i = 0; i < iterations; ++i) buf.sputn(chunk, chunksize); stop_counters(time, resource); report_performance(__FILE__, "C++", time, resource); unlink("tmp"); delete [] chunk; return 0; }