| /* |
| * 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 |
