2 Copyright (C) 2000-2007 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include <glibmm/threads.h>
28 #include "pbd/libpbd_visibility.h"
32 /** a unique ID to identify objects numerically */
42 bool operator== (const ID& other) const {
43 return _id == other._id;
46 bool operator!= (const ID& other) const {
47 return _id != other._id;
50 bool operator== (const std::string&) const;
51 bool operator== (uint64_t n) const {
55 ID& operator= (std::string);
56 ID& operator= (const ID&);
58 bool operator< (const ID& other) const {
59 return _id < other._id;
62 std::string to_s () const;
64 static uint64_t counter() { return _counter; }
65 static void init_counter (uint64_t val) { _counter = val; }
70 bool string_assign (std::string);
72 static Glib::Threads::Mutex* counter_lock;
73 static uint64_t _counter;
78 LIBPBD_API std::ostream& operator<< (std::ostream& ostr, const PBD::ID&);
80 #endif /* __pbd_id_h__ */