Android Native IPC Scenario Support situation

1. Binder-binders that do not support native layers
2. Memory sharing-not supported
3. Semaphore (signal semaphore)-not supported
4. Message Queuing-not supported
5. Signal-support, but can not be used Sigqueue message, can only be used to install the signal, to collect native crash log
6. Pipelines-anonymous pipes, support
7. Pipeline-FIFO, support
8. Socket-Support

[Reference] Why Binder is not supported in native Https://groups.google.com/forum/?fromgroups=#!topic/android-ndk/1QmVRrNckfM

Why not support memory sharing, Message Queuing, semaphores, see https://android.googlesource.com/platform/ndk/+/4e159d95ebf23b5f72bb707b0cb1518ef96b3d03/ DOCS/SYSTEM/LIBC/SYSV-IPC. Txt

Https://groups.google.com/forum/#!topic/android-ndk/FzJIsJIxCX4

Http://stackoverflow.com/questions/18603267/cross-process-locking-with-android-ndk

Pipe available, see http://stackoverflow.com/questions/8471552/porting-c-code-which-uses-fork-to-android

Description of the document in the Android source code: Http://www.netmite.com/android/mydroid/1.6/bionic/libc/docs/SYSV-IPC.TXT

(The file is in Android4.) 3 appears to have moved out of the document)

Android does not support for System V IPCs, i.e. the facilities provided by thefollowing standard Posix headers:  <sys/s em.h>/   * SysV semaphores */  <sys/shm.h>/   * SysV Shared memory segments */  <sys/msg.h> /   * SysV message queues */  <sys/ipc.h>/* General   IPC Definitions */the reason for this is due to the FA Ct., by design, they leads to globalkernel resource leakage.

The reason is to prevent kernel resource leaks.

In addition:fork () also try not to use.

The truth is simple: we should not control the bottom of Android, these APIs can cause system instability.

Https://groups.google.com/forum/#!msg/android-platform/80jr-_A-9bU/nkzslcgVrfYJ

"Bear on Mind" the Dalvik VM doesn ' t like fork () much, and goes into conniptions if you try to do *any* work between t He fork () and the EXEC (). ”

Https://groups.google.com/forum/#!topic/android-ndk/FzJIsJIxCX4

Android Native IPC Scenario Support situation