Hello Mohammad,

On 10.09.2015 16:01, Mohammad Hamad wrote:

I am trying to send big buffer using RPC call. to do that I used to divide the buffer and send it many time . I read about the synchronous bulk transfer, by using shared memory with the synchronous RPC. are there any samples about using this method.

I recommend to look at the timer-session RPC interface (Section "4.5.3. Terminal and UART" of the documentation [1]) as a reference:

https://github.com/genodelabs/genode/tree/master/repos/os/include/terminal_s...

Please note the difference between the declaration of the read/write functions and the RPC_FUNCTION declarations of 'Rpc_read' and 'Rpc_write'. The read/write functions are plain virtual functions implemented in 'client.c'. Those functions take a size and a pointer to a buffer as arguments. They copy the payload from/to the shared memory buffer and issue the RPC calls. The Rpc_read/Rpc_write definitions merely contain the size argument but no buffer pointer. Whereas the payload is transferred via the shared-memory buffer, the size is transmitted as an RPC-function argument.

For more examples, you may also have a look at the input session and the report session.

[1] http://genode.org/documentation/genode-foundations-15-05.pdf

Cheers Norman