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buffer_id.h
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1 /*
2  * Copyright © 2012 Canonical Ltd.
3  *
4  * This program is free software: you can redistribute it and/or modify it
5  * under the terms of the GNU Lesser General Public License version 3,
6  * as published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU Lesser General Public License for more details.
12  *
13  * You should have received a copy of the GNU Lesser General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15  *
16  * Authored by: Kevin DuBois <kevin.dubois@canonical.com>
17  */
18 #ifndef MIR_GRAPHICS_BUFFER_ID_H_
19 #define MIR_GRAPHICS_BUFFER_ID_H_
20 
21 #include <cstdint>
22 
23 namespace mir
24 {
25 namespace graphics
26 {
27 class BufferID
28 {
29 public:
30  BufferID() : value(id_invalid){}
31  explicit BufferID(uint32_t val) : value(val) {}
32  bool is_valid() const { return (id_invalid != value); }
33  uint32_t as_uint32_t() const { return value; };
34 
35 private:
36  uint32_t value;
37  static const uint32_t id_invalid = 0;
38 };
39 
40 inline bool operator < (BufferID const& lhs, BufferID const& rhs)
41 {
42  return lhs.as_uint32_t() < rhs.as_uint32_t();
43 }
44 
45 inline bool operator == (BufferID const& lhs, BufferID const& rhs)
46 {
47  return lhs.as_uint32_t() == rhs.as_uint32_t();
48 }
49 inline bool operator != (BufferID const& lhs, BufferID const& rhs)
50 {
51  return lhs.as_uint32_t() != rhs.as_uint32_t();
52 }
53 
54 }
55 }
56 #endif /* MIR_GRAPHICS_BUFFER_ID_H_ */

Copyright © 2012,2013 Canonical Ltd.
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