How to use the socket of parent task in the child task?

Hi michel,

Can you give more details about your concern, like the tool version you are using and the program you are trying to run ?

I use CCS5.2,  and the mcsdk is 2.01,bios 6.33,ndk 2.21.

I create a TCP socket and make it connected in the parent task, then i create a send task,

the code is "TaskCreate( TCP_perform_send, "TCPSX", OS_TASKPRINORM, 0x1000, (UINT32)TaskSelf(), (UINT32)stcp_child, 0 );"

stcp_child is a connected socket.

In the TCP_perform_send function ,I use

 fdOpenSession( TaskSelf() );

    A=fdShare(stcp_child);

but A is -1 that means fdShare(stcp_child) failed, and I don't know why.

Try calling fdError() after fdShare to see why fdShare is failing (returns an int).  The error code definitions are in \ndk_2_21_x_x\packages\ti\inc\serrno.h

Post back what you get and we can go from there.

It returns 9,which means a invalid socket. But I printf the FD of socket,it is the same as the FD of the socket of parent. So I don't know why it is?

I will investigate- there might be extra setup required if a socket is to be shared (that is not "shared" in the NDK document).

My first test will be to add a call to fdshare to the ndk helloworld example.