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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
/**
* \class storage::NoMemoryManager
*
* \brief Memory manager that gives out max memory to everyone.
*
* Memory manager to use for testing and for apps not wanting to track memory.
* This manager will merely give out max to everyone who asks and not even keep
* track of anything.
*/
#pragma once
#include <vespa/storageframework/generic/memory/memorymanagerinterface.h>
#include <vespa/vespalib/util/printable.h>
#include <vespa/vespalib/util/sync.h>
#include <map>
namespace storage {
namespace framework {
namespace defaultimplementation {
class SimpleMemoryTokenImpl : public MemoryToken
{
uint64_t _allocated;
public:
SimpleMemoryTokenImpl(const SimpleMemoryTokenImpl &) = delete;
SimpleMemoryTokenImpl & operator = (const SimpleMemoryTokenImpl &) = delete;
SimpleMemoryTokenImpl(uint64_t allocated) : _allocated(allocated) {}
uint64_t getSize() const override { return _allocated; }
bool resize(uint64_t /* min */, uint64_t max) override { _allocated = max; return true; }
};
class NoMemoryManager : public MemoryManagerInterface
{
vespalib::Lock _typeLock;
std::map<std::string, MemoryAllocationType::UP> _types;
public:
typedef std::unique_ptr<NoMemoryManager> UP;
void setMaximumMemoryUsage(uint64_t) override {}
const MemoryAllocationType & registerAllocationType(const MemoryAllocationType& type) override;
const MemoryAllocationType & getAllocationType(const std::string& name) const override;
MemoryToken::UP allocate(const MemoryAllocationType&, uint64_t /* min */, uint64_t max,
uint8_t /* priority */, ReduceMemoryUsageInterface* = 0) override
{
return SimpleMemoryTokenImpl::UP(new SimpleMemoryTokenImpl(max));
}
uint64_t getMemorySizeFreeForPriority(uint8_t priority) const override {
(void) priority;
return std::numeric_limits<uint64_t>().max();
}
std::vector<const MemoryAllocationType*> getAllocationTypes() const override;
};
} // defaultimplementation
} // framework
} // storage
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