mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-26 17:01:07 +00:00
121 lines
2.8 KiB
C++
121 lines
2.8 KiB
C++
/*
|
|
* \brief Client-side Terminal session interface
|
|
* \author Norman Feske
|
|
* \date 2011-08-11
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2011 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
#ifndef _INCLUDE__TERMINAL_SESSION__CLIENT_H_
|
|
#define _INCLUDE__TERMINAL_SESSION__CLIENT_H_
|
|
|
|
/* Genode includes */
|
|
#include <util/misc_math.h>
|
|
#include <util/string.h>
|
|
#include <base/lock.h>
|
|
#include <base/env.h>
|
|
#include <base/rpc_client.h>
|
|
|
|
#include <terminal_session/terminal_session.h>
|
|
|
|
namespace Terminal {
|
|
|
|
class Session_client : public Genode::Rpc_client<Session>
|
|
{
|
|
private:
|
|
|
|
/**
|
|
* Shared-memory buffer used for carrying the payload
|
|
* of read/write operations
|
|
*/
|
|
struct Io_buffer
|
|
{
|
|
Genode::Dataspace_capability ds_cap;
|
|
char *base;
|
|
Genode::size_t size;
|
|
Genode::Lock lock;
|
|
|
|
Io_buffer(Genode::Dataspace_capability ds_cap)
|
|
:
|
|
ds_cap(ds_cap),
|
|
base(Genode::env()->rm_session()->attach(ds_cap)),
|
|
size(ds_cap.call<Genode::Dataspace::Rpc_size>())
|
|
{ }
|
|
|
|
~Io_buffer()
|
|
{
|
|
Genode::env()->rm_session()->detach(base);
|
|
}
|
|
};
|
|
|
|
Io_buffer _io_buffer;
|
|
|
|
public:
|
|
|
|
Session_client(Genode::Capability<Session> cap)
|
|
:
|
|
Genode::Rpc_client<Session>(cap),
|
|
_io_buffer(call<Rpc_dataspace>())
|
|
{ }
|
|
|
|
Size size() { return call<Rpc_size>(); }
|
|
|
|
bool avail() { return call<Rpc_avail>(); }
|
|
|
|
Genode::size_t read(void *buf, Genode::size_t buf_size)
|
|
{
|
|
Genode::Lock::Guard _guard(_io_buffer.lock);
|
|
|
|
/* instruct server to fill the I/O buffer */
|
|
Genode::size_t num_bytes = call<Rpc_read>(buf_size);
|
|
|
|
/* copy-out I/O buffer */
|
|
num_bytes = Genode::min(num_bytes, buf_size);
|
|
Genode::memcpy(buf, _io_buffer.base, num_bytes);
|
|
|
|
return num_bytes;
|
|
}
|
|
|
|
Genode::size_t write(void const *buf, Genode::size_t num_bytes)
|
|
{
|
|
Genode::Lock::Guard _guard(_io_buffer.lock);
|
|
|
|
Genode::size_t written_bytes = 0;
|
|
char const * const src = (char const *)buf;
|
|
|
|
while (written_bytes < num_bytes) {
|
|
|
|
/* copy payload to I/O buffer */
|
|
Genode::size_t n = Genode::min(num_bytes - written_bytes,
|
|
_io_buffer.size);
|
|
Genode::memcpy(_io_buffer.base, src + written_bytes, n);
|
|
|
|
/* tell server to pick up new I/O buffer content */
|
|
call<Rpc_write>(n);
|
|
|
|
written_bytes += n;
|
|
}
|
|
return num_bytes;
|
|
}
|
|
|
|
void connected_sigh(Genode::Signal_context_capability cap)
|
|
{
|
|
call<Rpc_connected_sigh>(cap);
|
|
}
|
|
|
|
void read_avail_sigh(Genode::Signal_context_capability cap)
|
|
{
|
|
call<Rpc_read_avail_sigh>(cap);
|
|
}
|
|
|
|
Genode::size_t io_buffer_size() const { return _io_buffer.size; }
|
|
};
|
|
}
|
|
|
|
#endif /* _INCLUDE__TERMINAL_SESSION__CLIENT_H_ */
|