86 lines
2.4 KiB
C++
86 lines
2.4 KiB
C++
// Copyright (C) 2004, 2005, 2006, 2007, 2009 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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#include <cstdio>
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#include <cstdlib>
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#include <fstream>
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#include <testsuite_performance.h>
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// libstdc++/11722
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int main()
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{
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using namespace std;
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using namespace __gnu_test;
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time_counter time;
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resource_counter resource;
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const int iterations = 500000;
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const int chunksize = 100;
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char* chunk = new char[chunksize];
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const char* name1 = "/usr/share/dict/words";
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const char* name2 = "/usr/share/dict/linux.words";
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const char* name = name1;
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// C
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FILE* file;
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if (!(file = fopen(name, "r")))
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{
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name = name2;
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if (!(file = fopen(name, "r")))
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exit(1);
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}
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setvbuf(file, 0, _IONBF, 0);
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start_counters(time, resource);
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for (int i = 0; i < iterations; ++i)
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if (fread(chunk, 1, chunksize, file) < chunksize)
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fseek(file, 0, SEEK_SET);
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stop_counters(time, resource);
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fclose(file);
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report_performance(__FILE__, "C", time, resource);
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clear_counters(time, resource);
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// C unlocked
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file = fopen(name, "r");
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setvbuf(file, 0, _IONBF, 0);
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start_counters(time, resource);
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for (int i = 0; i < iterations; ++i)
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if (fread_unlocked(chunk, 1, chunksize, file) < chunksize)
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fseek(file, 0, SEEK_SET);
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stop_counters(time, resource);
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fclose(file);
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report_performance(__FILE__, "C unlocked", time, resource);
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clear_counters(time, resource);
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// C++
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filebuf buf;
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buf.pubsetbuf(0, 0);
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buf.open(name, ios_base::in);
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start_counters(time, resource);
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for (int i = 0; i < iterations; ++i)
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if (buf.sgetn(chunk, chunksize) < chunksize)
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buf.pubseekoff(0, ios::beg);
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stop_counters(time, resource);
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report_performance(__FILE__, "C++", time, resource);
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delete [] chunk;
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return 0;
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}
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