3 * Copyright 2007,2009 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 #ifndef INCLUDED_PMT_POOL_H
22 #define INCLUDED_PMT_POOL_H
26 #include <boost/thread.hpp>
31 * \brief very simple thread-safe fixed-size allocation pool
33 * FIXME may want to go to global allocation with per-thread free list.
34 * This would eliminate virtually all lock contention.
42 typedef boost::unique_lock<boost::mutex> scoped_lock;
43 mutable boost::mutex d_mutex;
44 boost::condition_variable d_cond;
48 size_t d_allocation_size;
52 std::vector<char *> d_allocations;
56 * \param itemsize size in bytes of the items to be allocated.
57 * \param alignment alignment in bytes of all objects to be allocated (must be power-of-2).
58 * \param allocation_size number of bytes to allocate at a time from the underlying allocator.
59 * \param max_items is the maximum number of items to allocate. If this number is exceeded,
60 * the allocate blocks. 0 implies no limit.
62 pmt_pool(size_t itemsize, size_t alignment = 16,
63 size_t allocation_size = 4096, size_t max_items = 0);
72 #endif /* INCLUDED_PMT_POOL_H */