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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libstdc++-v3/] [testsuite/] [performance/] [27_io/] [filebuf_sgetn_unbuf.cc] - Rev 848
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// Copyright (C) 2004, 2005, 2006, 2007, 2009 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 <cstdio> #include <cstdlib> #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; }
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