-/*
- Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
-
- This file is part of DCP-o-matic.
-
- DCP-o-matic 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 of the License, or
- (at your option) any later version.
-
- DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
-
-*/
-
-#ifndef DCPOMATIC_SAFE_STRINGSTREAM_H
-#define DCPOMATIC_SAFE_STRINGSTREAM_H
-
-#include <boost/thread/mutex.hpp>
-
-/* I've not been able to reproduce it, but there have been reports that DCP-o-matic crashes
- * on OS X with two simultaneous backtraces that look like this:
- *
- * 0 libSystem.B.dylib 0x00007fff84ebe264 __numeric_load_locale + 125
- * 1 libSystem.B.dylib 0x00007fff84e2aac4 loadlocale + 323
- * 2 libstdc++.6.dylib 0x00007fff8976ba69 std::__convert_from_v(int* const&, char*, int, char const*, ...) + 199
- * 3 libstdc++.6.dylib 0x00007fff8974e99b std::ostreambuf_iterator<char, std::char_traits<char> > std::num_put<char, std::ostreambuf_iterator<char,
-std::char_traits<char> > >::_M_insert_float<double>(std::ostreambuf_iterator<char, std::char_traits<char> >, std::ios_base&, char, char, double) const + 199
- * 4 libstdc++.6.dylib 0x00007fff8974ebc0 std::num_put<char, std::ostreambuf_iterator<char, std::char_traits<char> >
->::do_put(std::ostreambuf_iterator<char, std::char_traits<char> >, std::ios_base&, char, double) const + 28
- * 5 libstdc++.6.dylib 0x00007fff897566a2 std::ostream& std::ostream::_M_insert<double>(double) + 178
- * 6 libdcpomatic.dylib 0x0000000100331e21 StringPrivate::Composition& StringPrivate::Composition::arg<float>(float const&) + 33
- *
- * in two different threads. I'm assuming that for some bizarre reason it is unsafe to use two separate stringstream
- * objects in different threads on OS X. This is a hack to work around it.
- */
-
-class SafeStringStream
-{
-public:
- SafeStringStream ()
- {}
-
- SafeStringStream (std::string s)
- : _stream (s)
- {}
-
- template <class T>
- std::ostream& operator<< (T val)
- {
- boost::mutex::scoped_lock lm (_mutex);
- _stream << val;
- return _stream;
- }
-
- template <class T>
- std::istream& operator>> (T& val)
- {
- boost::mutex::scoped_lock lm (_mutex);
- _stream >> val;
- return _stream;
- }
-
- std::string str () const {
- return _stream.str ();
- }
-
- void str (std::string const & s) {
- _stream.str (s);
- }
-
- void imbue (std::locale const & loc)
- {
- boost::mutex::scoped_lock lm (_mutex);
- _stream.imbue (loc);
- }
-
- void width (int w)
- {
- _stream.width (w);
- }
-
- void fill (int f)
- {
- _stream.fill (f);
- }
-
- void precision (int p)
- {
- _stream.precision (p);
- }
-
- bool good () const
- {
- return _stream.good ();
- }
-
- std::string getline ()
- {
- boost::mutex::scoped_lock lm (_mutex);
- std::string s;
- std::getline (_stream, s);
- return s;
- }
-
- void setf (std::ios_base::fmtflags flags, std::ios_base::fmtflags mask)
- {
- _stream.setf (flags, mask);
- }
-
-private:
- static boost::mutex _mutex;
- std::stringstream _stream;
-};
-
-#endif
projects / dcpomatic.git / commitdiff