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66 lines
1.3 KiB
C
66 lines
1.3 KiB
C
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/*
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* \brief Receive window for capability selectors
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* \author Norman Feske
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* \date 2016-03-22
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*/
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/*
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* Copyright (C) 2016 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 General Public License version 2.
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*/
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#ifndef _INCLUDE__FOC__RECEIVE_WINDOW_H_
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#define _INCLUDE__FOC__RECEIVE_WINDOW_H_
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/* Genode includes */
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#include <base/stdint.h>
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#include <base/ipc_msgbuf.h>
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#include <base/cap_map.h>
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namespace Genode { struct Receive_window; }
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class Genode::Receive_window
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{
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private:
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/**
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* Base of capability receive window.
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*/
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Cap_index* _rcv_idx_base = nullptr;
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enum { MAX_CAPS_PER_MSG = Msgbuf_base::MAX_CAPS_PER_MSG };
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public:
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Receive_window() { }
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~Receive_window()
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{
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if (_rcv_idx_base)
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cap_idx_alloc()->free(_rcv_idx_base, MAX_CAPS_PER_MSG);
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}
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void init()
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{
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_rcv_idx_base = cap_idx_alloc()->alloc_range(MAX_CAPS_PER_MSG);
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}
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/**
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* Return address of capability receive window
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*/
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addr_t rcv_cap_sel_base() { return _rcv_idx_base->kcap(); }
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/**
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* Return received selector with index i
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*
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* \return capability selector, or 0 if index is invalid
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*/
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addr_t rcv_cap_sel(unsigned i) {
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return rcv_cap_sel_base() + i*Fiasco::L4_CAP_SIZE; }
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};
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#endif /* _INCLUDE__FOC__RECEIVE_WINDOW_H_ */
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