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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
#ifndef H_OS_UTIL_
#define H_OS_UTIL_
/* Helpers to pass integers as pointers and vice-versa */
#define POINTER_TO_UINT(p) ((unsigned int) ((uintptr_t) (p)))
#define UINT_TO_POINTER(u) ((void *) ((uintptr_t) (u)))
#define POINTER_TO_INT(p) ((int) ((intptr_t) (p)))
#define INT_TO_POINTER(u) ((void *) ((intptr_t) (u)))
/* Helper to retrieve pointer to "parent" object in structure */
#define CONTAINER_OF(ptr, type, field) \
((type *)(((char *)(ptr)) - offsetof(type, field)))
/* Helper to calculate number of elements in array */
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(array) \
(sizeof(array) / sizeof((array)[0]))
#endif
#endif
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