L4Re - L4 Runtime Environment
fd_store_impl.h
1 /*
2  * (c) 2010 Alexander Warg <warg@os.inf.tu-dresden.de>
3  * economic rights: Technische Universit├Ąt Dresden (Germany)
4  *
5  * This file is part of TUD:OS and distributed under the terms of the
6  * GNU General Public License 2.
7  * Please see the COPYING-GPL-2 file for details.
8  *
9  * As a special exception, you may use this file as part of a free software
10  * library without restriction. Specifically, if other files instantiate
11  * templates or use macros or inline functions from this file, or you compile
12  * this file and link it with other files to produce an executable, this
13  * file does not by itself cause the resulting executable to be covered by
14  * the GNU General Public License. This exception does not however
15  * invalidate any other reasons why the executable file might be covered by
16  * the GNU General Public License.
17  */
18 #include "fd_store.h"
19 
20 namespace L4Re { namespace Core {
21 
22 int
23 Fd_store::alloc() throw()
24 {
25  for (int i = _fd_hint; i < MAX_FILES; ++i)
26  {
27  if (!_files[i])
28  {
29  _fd_hint = i + 1;
30  return i;
31  }
32  }
33 
34  return -1;
35 }
36 
37 void
38 Fd_store::free(int fd) throw()
39 {
40  _files[fd] = 0;
41  if (fd < _fd_hint)
42  _fd_hint = fd;
43 }
44 
45 }}
46 
L4Re C++ Interfaces.
Definition: cmd_control:15