From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- .../performance/27_io/filebuf_sgetn_unbuf.cc | 85 ++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 libstdc++-v3/testsuite/performance/27_io/filebuf_sgetn_unbuf.cc (limited to 'libstdc++-v3/testsuite/performance/27_io/filebuf_sgetn_unbuf.cc') diff --git a/libstdc++-v3/testsuite/performance/27_io/filebuf_sgetn_unbuf.cc b/libstdc++-v3/testsuite/performance/27_io/filebuf_sgetn_unbuf.cc new file mode 100644 index 000000000..1eb3dc5cf --- /dev/null +++ b/libstdc++-v3/testsuite/performance/27_io/filebuf_sgetn_unbuf.cc @@ -0,0 +1,85 @@ +// 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 +// . + + +#include +#include +#include +#include + +// 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; +} -- cgit v1.2.3