Function init_dynamic_array2

mysys/array.c:44–77

*/

my_bool init_dynamic_array2(PSI_memory_key psi_key, DYNAMIC_ARRAY *array,
                            size_t element_size, void *init_buffer,
                            size_t init_alloc, size_t alloc_increment,
                            myf my_flags)
{
  DBUG_ENTER("init_dynamic_array2");
  if (!alloc_increment)
  {
    alloc_increment=MY_MAX((8192-MALLOC_OVERHEAD)/element_size,16);
    if (init_alloc > 8 && alloc_increment > init_alloc * 2)
      alloc_increment=init_alloc*2;
  }
  array->elements=0;
  array->max_element=init_alloc;
  array->alloc_increment=alloc_increment;
  array->size_of_element=element_size;
  array->m_psi_key= psi_key;
  array->malloc_flags= my_flags;
  DBUG_ASSERT((my_flags & MY_INIT_BUFFER_USED) == 0);
  if ((array->buffer= init_buffer))
  {
    array->malloc_flags|= MY_INIT_BUFFER_USED; 
    DBUG_RETURN(FALSE);
  }
  /* 
    Since the dynamic array is usable even if allocation fails here malloc
    should not throw an error
  */
  if (init_alloc &&
      !(array->buffer= (uchar*) my_malloc(psi_key, element_size*init_alloc,
                                          MYF(my_flags))))
    array->max_element=0;
  DBUG_RETURN(FALSE);
}

/*
  Insert element at the end of array. Allocate memory if needed.