From 9f35e4aab57dfccf0b112c8e4cb152c8b85b081b Mon Sep 17 00:00:00 2001 From: Paolo Carlini Date: Sun, 4 Apr 2004 18:18:29 +0000 Subject: [PATCH] filebuf_sputn_unbuf.cc: New, adapted from libstdc++/11378. 2004-04-04 Paolo Carlini Petur Runolfsson * testsuite/performance/27_io/filebuf_sputn_unbuf.cc: New, adapted from libstdc++/11378. Co-Authored-By: Petur Runolfsson From-SVN: r80398 --- libstdc++-v3/ChangeLog | 6 ++ .../performance/27_io/filebuf_sputn_unbuf.cc | 82 ++++++++++++++++++++++ 2 files changed, 88 insertions(+) create mode 100644 libstdc++-v3/testsuite/performance/27_io/filebuf_sputn_unbuf.cc diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog index 39cfd05..8ff1d83 100644 --- a/libstdc++-v3/ChangeLog +++ b/libstdc++-v3/ChangeLog @@ -1,3 +1,9 @@ +2004-04-04 Paolo Carlini + Petur Runolfsson + + * testsuite/performance/27_io/filebuf_sputn_unbuf.cc: New, + adapted from libstdc++/11378. + 2004-04-03 Paolo Carlini * include/ext/mt_allocator.h (__mt_alloc<>::allocate): Factor out diff --git a/libstdc++-v3/testsuite/performance/27_io/filebuf_sputn_unbuf.cc b/libstdc++-v3/testsuite/performance/27_io/filebuf_sputn_unbuf.cc new file mode 100644 index 0000000..d40e0c2 --- /dev/null +++ b/libstdc++-v3/testsuite/performance/27_io/filebuf_sputn_unbuf.cc @@ -0,0 +1,82 @@ +// 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, 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 +#include +#include + +// 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; +} -- 2.7.4