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