Program Listing for File MonotonicAllocationStrategy.cpp¶
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//////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2016-20, Lawrence Livermore National Security, LLC and Umpire
// project contributors. See the COPYRIGHT file for details.
//
// SPDX-License-Identifier: (MIT)
//////////////////////////////////////////////////////////////////////////////
#include "umpire/strategy/MonotonicAllocationStrategy.hpp"
#include "umpire/util/Macros.hpp"
#include "umpire/ResourceManager.hpp"
namespace umpire {
namespace strategy {
MonotonicAllocationStrategy::MonotonicAllocationStrategy(
const std::string& name,
int id,
Allocator allocator,
std::size_t capacity) :
AllocationStrategy(name, id),
m_size(0),
m_capacity(capacity),
m_allocator(allocator.getAllocationStrategy())
{
m_block = m_allocator->allocate(m_capacity);
}
MonotonicAllocationStrategy::~MonotonicAllocationStrategy()
{
m_allocator->deallocate(m_block);
}
void*
MonotonicAllocationStrategy::allocate(std::size_t bytes)
{
void* ret = static_cast<char*>(m_block) + m_size;
m_size += bytes;
if (m_size > m_capacity) {
UMPIRE_ERROR("MonotonicAllocationStrategy capacity exceeded " << m_size << " > " << m_capacity);
}
UMPIRE_LOG(Debug, "(bytes=" << bytes << ") returning " << ret);
return ret;
}
void
MonotonicAllocationStrategy::deallocate(void* UMPIRE_UNUSED_ARG(ptr))
{}
std::size_t
MonotonicAllocationStrategy::getCurrentSize() const noexcept
{
UMPIRE_LOG(Debug, "() returning " << m_size);
return m_size;
}
std::size_t
MonotonicAllocationStrategy::getHighWatermark() const noexcept
{
UMPIRE_LOG(Debug, "() returning " << m_capacity);
return m_capacity;
}
Platform
MonotonicAllocationStrategy::getPlatform() noexcept
{
return m_allocator->getPlatform();
}
} // end of namespace strategy
} // end of namespace umpire