8aa1e349fc
The new 'Terminal_session::size_changed_sigh' RPC function registers a signal handler that is triggered each time when the terminal size changes. It enables the client to adjust itself to the new size by subsequently calling the 'size' RPC function. Of all terminal servers, only the graphical terminal triggers this signal.
94 lines
2.3 KiB
C++
94 lines
2.3 KiB
C++
/*
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* \brief Terminal session component
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* \author Christian Prochaska
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* \date 2012-05-16
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*/
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/*
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* Copyright (C) 2012-2017 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _TERMINAL_SESSION_COMPONENT_H_
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#define _TERMINAL_SESSION_COMPONENT_H_
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/* Genode includes */
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#include <base/rpc_server.h>
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#include <base/attached_ram_dataspace.h>
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#include <os/ring_buffer.h>
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#include <terminal_session/terminal_session.h>
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namespace Terminal_crosslink {
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using namespace Genode;
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enum { STACK_SIZE = sizeof(addr_t)*1024 };
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enum { BUFFER_SIZE = 4096 };
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class Session_component : public Rpc_object<Terminal::Session,
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Session_component>
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{
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private:
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Env &_env;
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Session_component &_partner;
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Genode::Session_capability _session_cap;
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Attached_ram_dataspace _io_buffer;
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typedef Genode::Ring_buffer<unsigned char, BUFFER_SIZE+1> Local_buffer;
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Local_buffer _buffer { };
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size_t _cross_num_bytes_avail;
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Signal_context_capability _read_avail_sigh { };
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public:
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/**
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* Constructor
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*/
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Session_component(Env &env, Session_component &partner);
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Session_capability cap();
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/**
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* Return true if capability belongs to session object
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*/
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bool belongs_to(Genode::Session_capability cap);
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/* to be called by the partner component */
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bool cross_avail();
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size_t cross_read(unsigned char *buf, size_t dst_len);
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void cross_write();
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/********************************
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** Terminal session interface **
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********************************/
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Size size() override;
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bool avail() override;
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Genode::size_t _read(Genode::size_t dst_len);
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Genode::size_t _write(Genode::size_t num_bytes);
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Genode::Dataspace_capability _dataspace();
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void connected_sigh(Genode::Signal_context_capability sigh) override;
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void read_avail_sigh(Genode::Signal_context_capability sigh) override;
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void size_changed_sigh(Genode::Signal_context_capability) override { }
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Genode::size_t read(void *, Genode::size_t) override;
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Genode::size_t write(void const *, Genode::size_t) override;
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};
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}
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#endif /* _TERMINAL_SESSION_COMPONENT_H_ */
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