80 lines
1.4 KiB
C++
80 lines
1.4 KiB
C++
/*
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* \brief Implementation of platform-specific capabilities
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* \author Stefan Kalkowski
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* \date 2015-05-20
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*/
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/*
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* Copyright (C) 2015-2017 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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/* Genode includes */
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#include <base/capability.h>
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/* base-internal includes */
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#include <base/internal/spin_lock.h>
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/* kernel includes */
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#include <kernel/interface.h>
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using namespace Genode;
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static volatile int spinlock = SPINLOCK_UNLOCKED;
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static uint8_t ref_counter[1 << (sizeof(Kernel::capid_t)*8)];
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Native_capability::Native_capability() { }
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void Native_capability::_inc()
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{
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if (!valid()) return;
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spinlock_lock(&spinlock);
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ref_counter[(addr_t)_data]++;
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spinlock_unlock(&spinlock);
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}
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void Native_capability::_dec()
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{
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if (!valid()) return;
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spinlock_lock(&spinlock);
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if (!--ref_counter[(addr_t)_data]) { Kernel::delete_cap((addr_t)_data); }
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spinlock_unlock(&spinlock);
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}
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long Native_capability::local_name() const
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{
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return (long)_data;
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}
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bool Native_capability::valid() const
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{
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return (addr_t)_data != Kernel::cap_id_invalid();
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}
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Native_capability::Raw Native_capability::raw() const { return { 0, 0, 0, 0 }; }
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void Native_capability::print(Genode::Output &out) const
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{
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using Genode::print;
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print(out, "cap<");
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if (_data) {
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print(out, (addr_t)_data);
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} else {
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print(out, "invalid");
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}
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print(out, ">");
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}
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