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文章 2017-11-15 来自：开发者社区

Android系统匿名共享内存（Anonymous Shared Memory）C++调用接口分析（6）

   接下来，我们再来看看server模块的实现。在external/ashmem/common目录下，只有一个源文件SharedBufferServer.cpp，它实现了内存共享服务SharedBufferService： #define LOG_TAG "SharedBufferServer"      #incl...

文章 2017-11-08 来自：开发者社区

Android系统匿名共享内存（Anonymous Shared Memory）C++调用接口分析（1）

在Android系统中，针对移动设备内存空间有限的特点，提供了一种在进程间共享数据的机制：匿名共享内存，它能够辅助内存管理系统来有效地管理内存，它的实现原理我们在前面已经分析过了。为了方便使用匿名共享内存机制，系统还提供了Java调用接口（MemoryFile）和C++调用接口（MemoryHeapBase、MemoryBase），Java接口在前面也已经分析...

文章 2017-11-08 来自：开发者社区

Android系统匿名共享内存（Anonymous Shared Memory）C++调用接口分析（4）

2. MemoryBase 文章开始时说过，MemoryBase接口是建立在MemoryHeapBase接口的基础上的，它们都可以作为一个Binder对象来在进程间进行数据共享，它们的关系如下所示： MemoryBase类包含了一个成员变量mHeap，它的类型的IMemoryHeap，M...

文章 2017-11-08 来自：开发者社区

Android系统匿名共享内存（Anonymous Shared Memory）C++调用接口分析（3）

回到前面BpMemoryHeap类中的assertMapped函数中，如果本BpMemoryHeap对象中的mHeapID等于-1，那么就说明这个BpMemoryHeap对象中的匿名共享内存还没准备就绪，因此，需要执行一次映射匿名共享内存的操作。在执行映射操作之作，先要看看在本进程中是否有其它映射到同一个M...

文章 2017-11-08 来自：开发者社区

Android系统匿名共享内存（Anonymous Shared Memory）C++调用接口分析（5）

下面我们再来看MemoryBase类在Client端的实现，同样，先看它们的类图关系：这个图中我们可以看出，MemoryBase类在Client端的实现与MemoryHeapBase类在Client端的实现是类似的，这里只要把IMemory类换成IMemoryHeap类以及把BpMemory类换成BpMemoryHeap类就变成是MemoryHeapBas...

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