Ichthyostega
32bea9521b
- create two vectors, attached to the `TrackingAllocator` - emplace Tracker-Objects - move an object to the other vector - destroy the containers 🠲 Event-Log looks plausible!
151 lines
3.8 KiB
C++
151 lines
3.8 KiB
C++
/*
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TRACKING-ALLOCATOR.hpp - test dummy objects for tracking ctor/dtor calls
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Copyright (C) Lumiera.org
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2023, Hermann Vosseler <Ichthyostega@web.de>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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* *****************************************************/
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/** @file tracking-allocator.hpp
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** unittest helper code: a custom allocator to track memory usage.
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** By registering each allocation and deallocation, correct memory handling
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** can be verified and memory usage can be investigated in practice.
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*/
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#ifndef LIB_TEST_TRACKING_ALLOCATOR_H
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#define LIB_TEST_TRACKING_ALLOCATOR_H
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#include "lib/error.hpp"
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#include "lib/nocopy.hpp"
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#include "lib/hash-value.h"
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#include "lib/symbol.hpp"
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#include "lib/test/event-log.hpp"
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//#include <cstddef>
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#include <utility>
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#include <memory>
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#include <list>
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using std::byte;
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namespace lib {
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namespace test {
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namespace {
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const Symbol GLOBAL{"GLOBAL"};
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}
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/** common registration table and memory pool */
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class MemoryPool;
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using PoolHandle = std::shared_ptr<MemoryPool>;
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class TrackingAllocator
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{
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PoolHandle mem_;
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public:
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/** can be default created to attach to a common pool */
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TrackingAllocator();
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/** create a separate, marked memory pool */
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TrackingAllocator (Literal id);
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// standard copy operations acceptable
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[[nodiscard]] void* allocate (size_t n);
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void deallocate (void*, size_t =0) noexcept;
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friend bool
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operator== (TrackingAllocator const& a1, TrackingAllocator const& a2)
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{
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return a1.mem_ == a2.mem_;
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}
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friend bool
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operator!= (TrackingAllocator const& a1, TrackingAllocator const& a2)
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{
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return not (a1 == a2);
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}
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/* ===== Diagnostics ===== */
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static HashVal checksum (Literal pool =GLOBAL);
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static size_t numAlloc (Literal pool =GLOBAL);
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static size_t numBytes (Literal pool =GLOBAL);
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static EventLog log;
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};
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template<typename TY>
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class TrackAlloc
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: public TrackingAllocator
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{
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public:
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using TrackingAllocator::TrackingAllocator;
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/** cross-building for another type, using a common pool */
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template<typename X>
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TrackAlloc (TrackAlloc<X> const& anchor)
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: TrackingAllocator{anchor}
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{ }
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/* ===== C++ standard allocator interface ===== */
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using value_type = TY;
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[[nodiscard]] TY* allocate (size_t cnt);
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void deallocate (TY*, size_t) noexcept;
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};
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/**
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* C++ standard allocator API : allot raw memory for \a cnt elements of type \a TY
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*/
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template<typename TY>
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TY*
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TrackAlloc<TY>::allocate (size_t cnt)
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{
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return static_cast<TY*> (TrackingAllocator::allocate (cnt * sizeof(TY)));
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}
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/**
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* C++ standard allocator API : clear an existing allocation,
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* which must have been allocated into the same pool, with given element cnt.
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*/
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template<typename TY>
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void
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TrackAlloc<TY>::deallocate (TY* loc, size_t cnt) noexcept
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{
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TrackingAllocator::deallocate (loc, cnt * sizeof(TY));
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}
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}} // namespace lib::test
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#endif /*LIB_TEST_TRACKING_ALLOCATOR_H*/
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