1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef _CM4F_ATOMIC_BITSET_H_ 18 #define _CM4F_ATOMIC_BITSET_H_ 19 20 #include <stdint.h> 21 #include <stdbool.h> 22 #include "toolchain.h" 23 24 struct AtomicBitset { 25 uint32_t numBits; 26 uint32_t words[]; 27 }; 28 29 #define ATOMIC_BITSET_NUM_WORDS(numbits) (((numbits) + 31) / 32) 30 #define ATOMIC_BITSET_SZ(numbits) (sizeof(struct AtomicBitset) + sizeof(uint32_t) * ATOMIC_BITSET_NUM_WORDS(numbits)) 31 #define ATOMIC_BITSET_DECL(nam, numbits, extra_keyword) DECLARE_OS_ALIGNMENT(nam, ATOMIC_BITSET_SZ(numbits), extra_keyword, struct AtomicBitset) 32 33 void atomicBitsetInit(struct AtomicBitset *set, uint32_t numBits); 34 uint32_t atomicBitsetGetNumBits(const struct AtomicBitset *set); 35 bool atomicBitsetGetBit(const struct AtomicBitset *set, uint32_t num); 36 void atomicBitsetClearBit(struct AtomicBitset *set, uint32_t num); 37 int32_t atomicBitsetFindClearAndSet(struct AtomicBitset *set); 38 39 #endif 40 41 42
