genode/repos/os/include/nitpicker_session/connection.h
Norman Feske c1b981ede4 Annotate session interfaces with CAP_QUOTA
The new 'CAP_QUOTA' enum value denotes the capability quota to be
transferred from the client to the server at session-creation time.

Issue #2398
2017-05-31 13:16:04 +02:00

121 lines
3.1 KiB
C++

/*
* \brief Connection to Nitpicker service
* \author Norman Feske
* \date 2008-08-22
*/
/*
* Copyright (C) 2008-2017 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__NITPICKER_SESSION__CONNECTION_H_
#define _INCLUDE__NITPICKER_SESSION__CONNECTION_H_
#include <nitpicker_session/client.h>
#include <framebuffer_session/client.h>
#include <input_session/client.h>
#include <util/arg_string.h>
#include <base/connection.h>
namespace Nitpicker { class Connection; }
class Nitpicker::Connection : public Genode::Connection<Session>,
public Session_client
{
public:
enum { RAM_QUOTA = 36*1024UL };
private:
Framebuffer::Session_client _framebuffer;
Input::Session_client _input;
Genode::size_t _session_quota = 0;
/**
* Create session and return typed session capability
*/
Session_capability _connect(Genode::Parent &parent, char const *label)
{
enum { ARGBUF_SIZE = 128 };
char argbuf[ARGBUF_SIZE];
argbuf[0] = 0;
if (Genode::strlen(label) > 0)
Genode::snprintf(argbuf, sizeof(argbuf), "label=\"%s\"", label);
/*
* Declare ram-quota donation
*/
using Genode::Arg_string;
Arg_string::set_arg(argbuf, sizeof(argbuf), "ram_quota", RAM_QUOTA);
Arg_string::set_arg(argbuf, sizeof(argbuf), "cap_quota", CAP_QUOTA);
return session(parent, argbuf);
}
public:
/**
* Constructor
*/
Connection(Genode::Env &env, char const *label = "")
:
/* establish nitpicker session */
Genode::Connection<Session>(env, _connect(env.parent(), label)),
Session_client(env.rm(), cap()),
/* request frame-buffer and input sub sessions */
_framebuffer(framebuffer_session()),
_input(env.rm(), input_session())
{ }
/**
* Constructor
*
* \noapi
* \deprecated Use the constructor with 'Env &' as first
* argument instead
*/
Connection(char const *label = "") __attribute__((deprecated))
:
/* establish nitpicker session */
Genode::Connection<Session>(_connect(*Genode::env_deprecated()->parent(), label)),
Session_client(*Genode::env_deprecated()->rm_session(), cap()),
/* request frame-buffer and input sub sessions */
_framebuffer(framebuffer_session()),
_input(*Genode::env_deprecated()->rm_session(), input_session())
{ }
void buffer(Framebuffer::Mode mode, bool use_alpha)
{
Genode::size_t const needed = ram_quota(mode, use_alpha);
Genode::size_t const upgrade = needed > _session_quota
? needed - _session_quota
: 0;
if (upgrade > 0) {
this->upgrade_ram(upgrade);
_session_quota += upgrade;
}
Session_client::buffer(mode, use_alpha);
}
/**
* Return sub session for Nitpicker's input service
*/
Input::Session_client *input() { return &_input; }
/**
* Return sub session for session's frame buffer
*/
Framebuffer::Session *framebuffer() { return &_framebuffer; }
};
#endif /* _INCLUDE__NITPICKER_SESSION__CONNECTION_H_ */