GraphicBufferAllocator.cpp revision 4243e666213029a293935987c979831093fb0779 
1/*
2**
3** Copyright 2009, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#include <sys/mman.h>
19#include <utils/CallStack.h>
20#include <cutils/ashmem.h>
21#include <cutils/log.h>
22
23#include <utils/Singleton.h>
24#include <utils/String8.h>
25
26#include <ui/BufferMapper.h>
27
28#include "BufferAllocator.h"
29
30// FIXME: ANDROID_GRALLOC_DEBUG must only be used with *our* gralloc
31#define ANDROID_GRALLOC_DEBUG 1
32
33
34namespace android {
35// ---------------------------------------------------------------------------
36
37template<class BufferAllocator> Mutex Singleton<BufferAllocator>::sLock;
38template<> BufferAllocator* Singleton<BufferAllocator>::sInstance(0);
39
40Mutex BufferAllocator::sLock;
41KeyedVector<buffer_handle_t, BufferAllocator::alloc_rec_t> BufferAllocator::sAllocList;
42
43BufferAllocator::BufferAllocator()
44    : mAllocDev(0)
45{
46    hw_module_t const* module;
47    int err = hw_get_module(GRALLOC_HARDWARE_MODULE_ID, &module);
48    LOGE_IF(err, "FATAL: can't find the %s module", GRALLOC_HARDWARE_MODULE_ID);
49    if (err == 0) {
50        gralloc_open(module, &mAllocDev);
51    }
52}
53
54BufferAllocator::~BufferAllocator()
55{
56    gralloc_close(mAllocDev);
57}
58
59void BufferAllocator::dump(String8& result) const
60{
61    Mutex::Autolock _l(sLock);
62    KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
63    size_t total = 0;
64    const size_t SIZE = 512;
65    char buffer[SIZE];
66    snprintf(buffer, SIZE, "Allocated buffers:\n");
67    result.append(buffer);
68    const size_t c = list.size();
69    for (size_t i=0 ; i<c ; i++) {
70        const alloc_rec_t& rec(list.valueAt(i));
71        snprintf(buffer, SIZE, "%10p: %10p | %7.2f KB | %4u x %4u | %2d | 0x%08x\n",
72            list.keyAt(i), rec.vaddr, rec.size/1024.0f,
73            rec.w, rec.h, rec.format, rec.usage);
74        result.append(buffer);
75        total += rec.size;
76    }
77    snprintf(buffer, SIZE, "Total allocated: %.2f KB\n", total/1024.0f);
78    result.append(buffer);
79}
80
81status_t BufferAllocator::alloc(uint32_t w, uint32_t h, PixelFormat format,
82        int usage, buffer_handle_t* handle, int32_t* stride)
83{
84    Mutex::Autolock _l(mLock);
85
86    // we have a h/w allocator and h/w buffer is requested
87    status_t err = mAllocDev->alloc(mAllocDev,
88            w, h, format, usage, handle, stride);
89    LOGW_IF(err, "alloc(%u, %u, %d, %08x, ...) failed %d (%s)",
90            w, h, format, usage, err, strerror(-err));
91
92    if (err == NO_ERROR) {
93        Mutex::Autolock _l(sLock);
94        KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
95        alloc_rec_t rec;
96        rec.w = w;
97        rec.h = h;
98        rec.format = format;
99        rec.usage = usage;
100        rec.vaddr = 0;
101        rec.size = h * stride[0] * bytesPerPixel(format);
102        list.add(*handle, rec);
103    }
104
105    return err;
106}
107
108status_t BufferAllocator::free(buffer_handle_t handle)
109{
110    Mutex::Autolock _l(mLock);
111
112#if ANDROID_GRALLOC_DEBUG
113    void* base = (void*)(handle->data[2]);
114#endif
115
116    status_t err = mAllocDev->free(mAllocDev, handle);
117    LOGW_IF(err, "free(...) failed %d (%s)", err, strerror(-err));
118
119#if ANDROID_GRALLOC_DEBUG
120    if (base) {
121        LOGD("freeing mapped handle %p from:", handle);
122        CallStack s;
123        s.update();
124        s.dump("");
125        BufferMapper::get().dump(handle);
126    }
127#endif
128
129    if (err == NO_ERROR) {
130        Mutex::Autolock _l(sLock);
131        KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
132        list.removeItem(handle);
133    }
134
135    return err;
136}
137
138status_t BufferAllocator::map(buffer_handle_t handle, void** addr)
139{
140    Mutex::Autolock _l(mLock);
141    status_t err = BufferMapper::get().map(handle, addr, this);
142    if (err == NO_ERROR) {
143        Mutex::Autolock _l(sLock);
144        KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
145        ssize_t idx = list.indexOfKey(handle);
146        if (idx >= 0)
147            list.editValueAt(idx).vaddr = addr;
148    }
149
150    return err;
151}
152
153status_t BufferAllocator::unmap(buffer_handle_t handle)
154{
155    Mutex::Autolock _l(mLock);
156    gralloc_module_t* mod = (gralloc_module_t*)mAllocDev->common.module;
157    status_t err = BufferMapper::get().unmap(handle, this);
158    if (err == NO_ERROR) {
159        Mutex::Autolock _l(sLock);
160        KeyedVector<buffer_handle_t, alloc_rec_t>& list(sAllocList);
161        ssize_t idx = list.indexOfKey(handle);
162        if (idx >= 0)
163            list.editValueAt(idx).vaddr = 0;
164    }
165
166    return err;
167}
168
169
170// ---------------------------------------------------------------------------
171}; // namespace android
172