648bcd1505
This patch unifies the patterns of using the 'Genode' and 'Libc' namespaces. Types defined in the 'internal/' headers reside in the 'Libc' namespace. The code in the headers does not need to use the 'Libc::' prefix. Compilation units import the 'Libc' namespace after the definition of local types. Local types reside in the 'Libc' namespace (and should eventually move to an 'internal/' header). Since the 'Libc' namespace imports the 'Genode' namespace, there is no need to use the 'Genode::' prefix. Consequently, code in the compilation units rarely need to qualify the 'Genode' or 'Libc' namespaces. There are a few cases where the 'Libc', the 'Genode', and the global (libc) namespaces are ambigious. In these cases, an explicit clarification is needed: - 'Genode::Allocator' differs from 'Libc::Allocator'. - 'Genode::Env' differs from 'Libc::Env'. - Genode's string functions (strcmp, memcpy, strcpy) conflict with the names of the (global) libc functions. - There exist both 'Genode::uint64_t' and the libc'c 'uint64_t'. Issue #3497
77 lines
1.7 KiB
C++
77 lines
1.7 KiB
C++
/*
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* \brief Utility for tracking the allocation of dataspaces by the malloc heap
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* \author Norman Feske
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* \date 2019-08-20
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*/
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/*
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* Copyright (C) 2016-2019 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 _LIBC__INTERNAL__MALLOC_RAM_ALLOCATOR_H_
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#define _LIBC__INTERNAL__MALLOC_RAM_ALLOCATOR_H_
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/* Genode includes */
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#include <base/registry.h>
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#include <base/allocator.h>
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#include <base/ram_allocator.h>
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namespace Libc { struct Malloc_ram_allocator; }
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struct Libc::Malloc_ram_allocator : Ram_allocator
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{
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typedef Genode::Allocator Allocator;
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Allocator &_md_alloc;
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Ram_allocator &_ram;
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struct Dataspace
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{
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Ram_dataspace_capability cap;
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Dataspace(Ram_dataspace_capability cap) : cap(cap) { }
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virtual ~Dataspace() { }
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};
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Registry<Registered<Dataspace> > _dataspaces { };
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void _release(Registered<Dataspace> &ds)
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{
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_ram.free(ds.cap);
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destroy(_md_alloc, &ds);
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}
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Malloc_ram_allocator(Allocator &md_alloc, Ram_allocator &ram)
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: _md_alloc(md_alloc), _ram(ram) { }
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~Malloc_ram_allocator()
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{
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_dataspaces.for_each([&] (Registered<Dataspace> &ds) {
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_release(ds); });
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}
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Ram_dataspace_capability alloc(size_t size, Cache_attribute cached) override
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{
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Ram_dataspace_capability cap = _ram.alloc(size, cached);
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new (_md_alloc) Registered<Dataspace>(_dataspaces, cap);
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return cap;
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}
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void free(Ram_dataspace_capability ds_cap) override
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{
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_dataspaces.for_each([&] (Registered<Dataspace> &ds) {
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if (ds_cap == ds.cap)
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_release(ds); });
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}
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size_t dataspace_size(Ram_dataspace_capability ds_cap) const override
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{
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return _ram.dataspace_size(ds_cap);
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}
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};
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#endif /* _LIBC__INTERNAL__MALLOC_RAM_ALLOCATOR_H_ */
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