VILLASnode/lib/memory/heap.cpp

/* Heap memory allocator.
 *
 * Author: Steffen Vogel <post@steffenvogel.de>
 * SPDX-FileCopyrightText: 2014-2023 Institute for Automation of Complex Power Systems, RWTH Aachen University
 * SPDX-License-Identifier: Apache-2.0
 */

#include <cstdlib>

#include <villas/exceptions.hpp>
#include <villas/node/memory.hpp>
#include <villas/utils.hpp>

using namespace villas;
using namespace villas::node;
using namespace villas::utils;
using namespace villas::node::memory;

static struct Allocation *heap_alloc(size_t len, size_t alignment,
                                     struct Type *m) {
  int ret;

  auto *ma = new struct Allocation;
  if (!ma)
    throw MemoryAllocationError();

  ma->alignment = alignment;
  ma->type = m;
  ma->length = len;

  if (ma->alignment < sizeof(void *))
    ma->alignment = sizeof(void *);

  ret = posix_memalign(&ma->address, ma->alignment, ma->length);
  if (ret) {
    delete ma;
    return nullptr;
  }

  return ma;
}

static int heap_free(struct Allocation *ma, struct Type *m) {
  ::free(ma->address);

  return 0;
}

// List of available memory types
struct Type villas::node::memory::heap = {.name = "heap",
                                          .flags = (int)Flags::HEAP,
                                          .alignment = 1,
                                          .alloc = heap_alloc,
                                          .free = heap_free};