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ROS 2 Client Library for Elixir.

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rclex src allocator.c
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src/allocator.c 

#include "allocator.h"

#include <erl_nif.h>

#include <rcutils/allocator.h>

#include <rcutils/macros.h>

#include <string.h>



// ref. https://github.com/ros2/rcutils/blob/rolling/src/allocator.c



static void *__nif_allocate(size_t size, void *state) {

  RCUTILS_CAN_RETURN_WITH_ERROR_OF(NULL);



  RCUTILS_UNUSED(state);

  return enif_alloc(size);

}



static void __nif_deallocate(void *pointer, void *state) {

  RCUTILS_UNUSED(state);

  enif_free(pointer);

}



static void *__nif_reallocate(void *pointer, size_t size, void *state) {

  RCUTILS_CAN_RETURN_WITH_ERROR_OF(NULL);



  RCUTILS_UNUSED(state);

  return enif_realloc(pointer, size);

}



static void *__nif_zero_allocate(size_t number_of_elements, size_t size_of_element, void *state) {

  RCUTILS_CAN_RETURN_WITH_ERROR_OF(NULL);



  RCUTILS_UNUSED(state);

  void *mem = enif_alloc(number_of_elements * size_of_element);

  if (mem != NULL) memset(mem, 0, number_of_elements * size_of_element);

  return mem;

}



rcutils_allocator_t get_nif_allocator() {

  static rcutils_allocator_t nif_allocator = {

      .allocate      = __nif_allocate,

      .deallocate    = __nif_deallocate,

      .reallocate    = __nif_reallocate,

      .zero_allocate = __nif_zero_allocate,

      .state         = NULL,

  };

  return nif_allocator;

}