mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-27 17:18:53 +00:00
113 lines
2.8 KiB
C++
113 lines
2.8 KiB
C++
/*
|
|
* \brief Client-side Terminal session interface
|
|
* \author Norman Feske
|
|
* \date 2011-08-11
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2011-2017 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU Affero General Public License version 3.
|
|
*/
|
|
|
|
#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/mutex.h>
|
|
#include <base/rpc_client.h>
|
|
#include <base/attached_dataspace.h>
|
|
|
|
#include <terminal_session/terminal_session.h>
|
|
|
|
namespace Terminal { class Session_client; }
|
|
|
|
|
|
class Terminal::Session_client : public Genode::Rpc_client<Session>
|
|
{
|
|
private:
|
|
|
|
Genode::Mutex _mutex { };
|
|
|
|
/**
|
|
* Shared-memory buffer used for carrying the payload
|
|
* of read/write operations
|
|
*/
|
|
Genode::Attached_dataspace _io_buffer;
|
|
|
|
public:
|
|
|
|
Session_client(Genode::Region_map &local_rm, Genode::Capability<Session> cap)
|
|
:
|
|
Genode::Rpc_client<Session>(cap),
|
|
_io_buffer(local_rm, call<Rpc_dataspace>())
|
|
{ }
|
|
|
|
Size size() override { return call<Rpc_size>(); }
|
|
|
|
bool avail() override { return call<Rpc_avail>(); }
|
|
|
|
Genode::size_t read(void *buf, Genode::size_t buf_size) override
|
|
{
|
|
Genode::Mutex::Guard _guard(_mutex);
|
|
|
|
/* 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.local_addr<char>(), num_bytes);
|
|
|
|
return num_bytes;
|
|
}
|
|
|
|
Genode::size_t write(void const *buf, Genode::size_t num_bytes) override
|
|
{
|
|
Genode::Mutex::Guard _guard(_mutex);
|
|
|
|
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 payload_bytes = Genode::min(num_bytes - written_bytes,
|
|
_io_buffer.size());
|
|
Genode::memcpy(_io_buffer.local_addr<char>(),
|
|
src + written_bytes, payload_bytes);
|
|
|
|
/* tell server to pick up new I/O buffer content */
|
|
Genode::size_t written_payload_bytes = call<Rpc_write>(payload_bytes);
|
|
|
|
written_bytes += written_payload_bytes;
|
|
|
|
if (written_payload_bytes != payload_bytes)
|
|
return written_bytes;
|
|
|
|
}
|
|
return written_bytes;
|
|
}
|
|
|
|
void connected_sigh(Genode::Signal_context_capability cap) override
|
|
{
|
|
call<Rpc_connected_sigh>(cap);
|
|
}
|
|
|
|
void read_avail_sigh(Genode::Signal_context_capability cap) override
|
|
{
|
|
call<Rpc_read_avail_sigh>(cap);
|
|
}
|
|
|
|
void size_changed_sigh(Genode::Signal_context_capability cap) override
|
|
{
|
|
call<Rpc_size_changed_sigh>(cap);
|
|
}
|
|
|
|
Genode::size_t io_buffer_size() const { return _io_buffer.size(); }
|
|
};
|
|
|
|
#endif /* _INCLUDE__TERMINAL_SESSION__CLIENT_H_ */
|