1 /*
2  * Copyright (C) 2007 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef ANDROID_MEMORY_DEALER_H
18 #define ANDROID_MEMORY_DEALER_H
19 
20 
21 #include <stdint.h>
22 #include <sys/types.h>
23 
24 #include <binder/IMemory.h>
25 #include <binder/MemoryHeapBase.h>
26 
27 namespace android {
28 // ----------------------------------------------------------------------------
29 
30 class SimpleBestFitAllocator;
31 
32 // ----------------------------------------------------------------------------
33 
34 class MemoryDealer : public RefBase
35 {
36 public:
37     MemoryDealer(size_t size, const char* name = 0,
38             uint32_t flags = 0 /* or bits such as MemoryHeapBase::READ_ONLY */ );
39 
40     virtual sp<IMemory> allocate(size_t size);
41     virtual void        deallocate(size_t offset);
42     virtual void        dump(const char* what) const;
43 
44     // allocations are aligned to some value. return that value so clients can account for it.
45     static size_t      getAllocationAlignment();
46 
getMemoryHeap()47     sp<IMemoryHeap> getMemoryHeap() const { return heap(); }
48 
49 protected:
50     virtual ~MemoryDealer();
51 
52 private:
53     const sp<IMemoryHeap>&      heap() const;
54     SimpleBestFitAllocator*     allocator() const;
55 
56     sp<IMemoryHeap>             mHeap;
57     SimpleBestFitAllocator*     mAllocator;
58 };
59 
60 
61 // ----------------------------------------------------------------------------
62 }; // namespace android
63 
64 #endif // ANDROID_MEMORY_DEALER_H
65