114 lines
3.2 KiB
C++
114 lines
3.2 KiB
C++
/*
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* \brief Lock-guarded allocator interface
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* \author Norman Feske
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* \author Stefan Kalkowski
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* \date 2008-08-05
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*/
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/*
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* Copyright (C) 2008-2017 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 _CORE__INCLUDE__SYNCED_RANGE_ALLOCATOR_H_
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#define _CORE__INCLUDE__SYNCED_RANGE_ALLOCATOR_H_
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#include <base/allocator.h>
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#include <base/synced_interface.h>
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namespace Genode {
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class Mapped_mem_allocator;
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template <typename> class Synced_range_allocator;
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}
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/**
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* Lock-guarded range allocator
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*
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* This class wraps the complete 'Range_allocator' interface while
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* preventing concurrent calls to the wrapped allocator implementation.
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*
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* \param ALLOC class implementing the 'Range_allocator' interface
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*/
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template <typename ALLOC>
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class Genode::Synced_range_allocator : public Range_allocator
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{
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private:
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friend class Mapped_mem_allocator;
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Lock _default_lock;
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Lock &_lock;
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ALLOC _alloc;
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Synced_interface<ALLOC, Lock> _synced_object;
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public:
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using Guard = typename Synced_interface<ALLOC, Lock>::Guard;
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template <typename... ARGS>
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Synced_range_allocator(Lock &lock, ARGS &&... args)
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: _lock(lock), _alloc(args...), _synced_object(_lock, &_alloc) { }
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template <typename... ARGS>
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Synced_range_allocator(ARGS &&... args)
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: _lock(_default_lock), _alloc(args...),
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_synced_object(_lock, &_alloc) { }
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Guard operator () () { return _synced_object(); }
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Guard operator () () const { return _synced_object(); }
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void print(Output &out) const { _synced_object()->print(out); }
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/*************************
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** Allocator interface **
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*************************/
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bool alloc(size_t size, void **out_addr) override {
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return _synced_object()->alloc(size, out_addr); }
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void free(void *addr, size_t size) override {
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_synced_object()->free(addr, size); }
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size_t consumed() const override {
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return _synced_object()->consumed(); }
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size_t overhead(size_t size) const override {
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return _synced_object()->overhead(size); }
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bool need_size_for_free() const override {
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return _synced_object()->need_size_for_free(); }
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/*******************************
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** Range-allocator interface **
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*******************************/
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int add_range(addr_t base, size_t size) override {
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return _synced_object()->add_range(base, size); }
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int remove_range(addr_t base, size_t size) override {
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return _synced_object()->remove_range(base, size); }
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Alloc_return alloc_aligned(size_t size, void **out_addr, int align,
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addr_t from = 0, addr_t to = ~0UL) override {
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return _synced_object()->alloc_aligned(size, out_addr, align, from, to); }
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Alloc_return alloc_addr(size_t size, addr_t addr) override {
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return _synced_object()->alloc_addr(size, addr); }
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void free(void *addr) override {
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_synced_object()->free(addr); }
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size_t avail() const override {
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return _synced_object()->avail(); }
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bool valid_addr(addr_t addr) const override {
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return _synced_object()->valid_addr(addr); }
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};
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#endif /* _CORE__INCLUDE__SYNCED_RANGE_ALLOCATOR_H_ */
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