messenger binder

resource, other processes also access the resource. Therefore, it is primarily used as a means of synchronization between processes and between different threads within the same process.6. signal : Not for information exchange, more suitable for process interrupt control, such as illegal memory access, kill a process, etc.;The kernel of Android is also based on the Linux kernel, why not directly adopt the Linux existing process IPC program, is not the Linux community so many outstanding people

to share data across processes, IPC refers to mutual calls and communication between two or more programs. It can not only share data, but also share a public function. A service can have several clients to access and call. Intent can carry some data to open another program (process), but it cannot perform real-time communication between processes. Broadcast can implement large-scale anti-DDoS broadcast, but it cannot communicate between two-way processes. IPC (

BinderBinder as a mechanism for IPC in Android, is used everywhere in Android. Contains three layers (Java, c++/c, driver).The purpose of binder is to implement communication between multiple processes, with data passed between the basic data type, binder type, and this wrapper in parcel.In the C + + tier, use multiple classes to encapsulate:The main classes are: RefBaseAbout reference counting

What is a binder? Binder is a type of IPC. Do not know IPC? Google, the omnipotent Google.In Linux, we know that resources are allocated and managed by processes. Processes run in independent spaces, which are closed and independent from each other. Then the problem arises. In a complicated operating system, what should we do if tasks need to be completed collaboratively between processes? This must inv

Binder is used to complete interprocess communication (IPC), that is, multiple processes are "not" together, from the thread point of view,thebinder driver code runs in the kernel state, the client program calls binders are done through system calls. Binder is an architecture that provides a server-side interface,binder driver, and client interface three module

Forwarded from: http://blog.sina.com.cn/s/blog_4af327e10101irie.htmladvantages and disadvantages of D-busLinux does not have a good IPC mechanism. Windows, Mac OS, Android also has "binder" subsystem. Linux has sockets, FIFO, shared memory and other mechanisms, which are not very good for the application layer. Kdbus attempts to create a mechanism that is similar to other systems for Linux.D-bus is the closest approach to this standard on Linux. Pros:

have an activity bind a service, to let the services serve the Activity, and I've submitted the code for the exercise to GitHub (Https://github.com/shanwu /interprocesscommpractice), there are different branches representing different examples, so you can compare the differences between different methods using the branch comparison function () on GitHub.Master Branch : In-process communication, represented by the official website extending the Binder

We know that in Android, every application runs in a separate process, which also guarantees that when one of the programs has an exception, it does not affect the normal functioning of another application. In many cases, we work with the service of various systems, and it is clear that the program we write is definitely not the same process as the system service, but how do they communicate? Binder is one of the ways in which an inter-process communi

prepare bullets before you leave .We know that the process, the virtual address is different, is not directly communication, this is a protection mechanism. Open Task Manager and look at the N-ary process, just imagine what happens if these processes communicate directly?And the user space can communicate with the kernel space through system calls, if there is a module in kernel space, can complete the data forwarding, then is not two processes can communicate? Such as:The above mentioned some u

PrefaceIn the ServiceManager of Binder source analysis, we introduce the process of using binder to communicate, that is, after ServiceManager registers itself as "administrator", it is responsible for the add operation of other service, or other client's get operations. In this process, there are some interfaces we do not have in-depth analysis, such as: 1. Open Binde