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filebuf_copy.cc: New, testing char by char file copy. 

2003-06-26  Nathan C. Myers  <ncm-nospam@cantrip.org>
	    Paolo Carlini  <pcarlini@unitus.it>

	* testsuite/performance/filebuf_copy.cc: New, testing char
	by char file copy.

Co-Authored-By: Paolo Carlini <pcarlini@unitus.it>

From-SVN: r68538
This commit is contained in:
Nathan C. Myers 2003-06-26 16:38:40 +00:00 committed by Paolo Carlini
parent 10d6ea27dc
commit 8370378a24
2 changed files with 81 additions and 0 deletions
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libstdc++-v3/ChangeLog
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@ -1,3 +1,9 @@
2003-06-26 Nathan C. Myers <ncm-nospam@cantrip.org>
Paolo Carlini <pcarlini@unitus.it>
* testsuite/performance/filebuf_copy.cc: New, testing char
by char file copy.
2003-06-26 Paolo Carlini <pcarlini@unitus.it>
Nathan C. Myers <ncm-nospam@cantrip.org>

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libstdc++-v3/testsuite/performance/filebuf_copy.cc Normal file
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// Copyright (C) 2003 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// 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>
int main()
{
using namespace std;
using namespace __gnu_cxx_test;
time_counter time;
resource_counter resource;
const unsigned long count = 1ul << 30;
// C unlocked
FILE* fpi = fopen("/dev/zero", "r");
FILE* fpo = fopen("/dev/null", "w");
start_counters(time, resource);
for (unsigned long i = 0; i < count; ++i)
{
int c = getc_unlocked(fpi);
if (c == EOF || putc_unlocked(c, fpo) == EOF)
break;
}
stop_counters(time, resource);
fclose(fpi);
fclose(fpo);
report_performance(__FILE__, "C unlocked", time, resource);
clear_counters(time, resource);
// C++
filebuf in;
in.open("/dev/zero", ios::in);
filebuf out;
out.open("/dev/null", ios::out);
start_counters(time, resource);
for (unsigned long i = 0; i < count; ++i)
{
int c = in.sbumpc();
if (c == EOF || out.sputc(c) == EOF)
break;
}
stop_counters(time, resource);
in.close();
out.close();
report_performance(__FILE__, "C++", time, resource);
return 0;
}