NDK running a sender thread and a receiver thread over the same port

will Resnick

Hi,

I am trying to run a sender thread and receiver thread over the same port. Each thread would transmit or recive async. I tried using the parent child paradigm with the parent thread connecting to the socket and then creating the sending thread and receiving thread. This does not work for some reason. I get back a value of -1 each time. Is there a way to do this or do I have to run on seperate ports?

Will

over 12 years ago

0 Steven Connell over 12 years ago

TI__Mastermind 45025 points

Hi Will,

It sounds like you are using the same socket in separate threads? I think you use the fdShare() API. Please refer to the NDK API guide for more details.

Steve

0 will Resnick over 12 years ago in reply to Steven Connell

Expert 2155 points

Hi Steve,

Im looking at the fdShare function and I need the handle to the file descriptor. Is that just the socket name that I created? Also, if using the socket name, I am calling fdShare in my 2 child threads. The parent thread made the connection and then created the 2 children threads, 1 is a sender and 1 is a receiver. When calling fdShare in my transmit thread, I get a return value of 0 meaning success. When I call fdShare in my receiver thread, I get a -1 failure. Can I not call fdShare twice?

Will

0 will Resnick over 12 years ago in reply to will Resnick

Expert 2155 points

Steve,

Found a thread that answered my question: http://e2e.ti.com/support/embedded/bios/f/355/p/120158/429219.aspx#429219. Also, found out that the reason my receive thread was timing out was because I had a receive timeout set. I removed the receive timeout and followed the e2e thread and it works.

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NDK running a sender thread and a receiver thread over the same port