memalloc.h revision 01d3fd3318a767e6ba75492ed08d57896df95d63 
1/*
2 * Copyright (c) 2011-2012, Code Aurora Forum. All rights reserved.
3
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *   * Redistributions of source code must retain the above copyright
8 *     notice, this list of conditions and the following disclaimer.
9 *   * Redistributions in binary form must reproduce the above
10 *     copyright notice, this list of conditions and the following
11 *     disclaimer in the documentation and/or other materials provided
12 *     with the distribution.
13 *   * Neither the name of Code Aurora Forum, Inc. nor the names of its
14 *     contributors may be used to endorse or promote products derived
15 *     from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
24 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
26 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
27 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30#ifndef GRALLOC_MEMALLOC_H
31#define GRALLOC_MEMALLOC_H
32
33#include <stdlib.h>
34
35namespace gralloc {
36
37struct alloc_data {
38    void           *base;
39    int            fd;
40    int            offset;
41    size_t         size;
42    size_t         align;
43    unsigned int   pHandle;
44    bool           uncached;
45    unsigned int   flags;
46    int            allocType;
47};
48
49class IMemAlloc {
50
51    public:
52    // Allocate buffer - fill in the alloc_data
53    // structure and pass it in. Mapped address
54    // and fd are returned in the alloc_data struct
55    virtual int alloc_buffer(alloc_data& data) = 0;
56
57    // Free buffer
58    virtual int free_buffer(void *base, size_t size,
59                            int offset, int fd) = 0;
60
61    // Map buffer
62    virtual int map_buffer(void **pBase, size_t size,
63                           int offset, int fd) = 0;
64
65    // Unmap buffer
66    virtual int unmap_buffer(void *base, size_t size,
67                             int offset) = 0;
68
69    // Clean and invalidate
70    virtual int clean_buffer(void *base, size_t size,
71                             int offset, int fd) = 0;
72
73    // Destructor
74    virtual ~IMemAlloc() {};
75
76    enum {
77        FD_INIT = -1,
78    };
79
80};
81
82} // end gralloc namespace
83#endif // GRALLOC_MEMALLOC_H
84