memalloc.h revision 513ddc2124abf90c63af41999201f0d2031af0c8 
1/*
2 * Copyright (c) 2011-2012, The Linux Foundation. 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 The Linux Foundation 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
37enum {
38    CACHE_CLEAN = 0x1,
39    CACHE_INVALIDATE,
40    CACHE_CLEAN_AND_INVALIDATE,
41};
42
43struct alloc_data {
44    void           *base;
45    int            fd;
46    int            offset;
47    size_t         size;
48    size_t         align;
49    unsigned int   pHandle;
50    bool           uncached;
51    unsigned int   flags;
52    int            allocType;
53};
54
55class IMemAlloc {
56
57    public:
58    // Allocate buffer - fill in the alloc_data
59    // structure and pass it in. Mapped address
60    // and fd are returned in the alloc_data struct
61    virtual int alloc_buffer(alloc_data& data) = 0;
62
63    // Free buffer
64    virtual int free_buffer(void *base, size_t size,
65                            int offset, int fd) = 0;
66
67    // Map buffer
68    virtual int map_buffer(void **pBase, size_t size,
69                           int offset, int fd) = 0;
70
71    // Unmap buffer
72    virtual int unmap_buffer(void *base, size_t size,
73                             int offset) = 0;
74
75    // Clean and invalidate
76    virtual int clean_buffer(void *base, size_t size,
77                             int offset, int fd, int op) = 0;
78
79    // Destructor
80    virtual ~IMemAlloc() {};
81
82    enum {
83        FD_INIT = -1,
84    };
85
86};
87
88} // end gralloc namespace
89#endif // GRALLOC_MEMALLOC_H
90