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 _X86_ATOMIC_BITSET_H_ 18 #define _X86_ATOMIC_BITSET_H_ 19 20 #include <stdint.h> 21 #include <stdbool.h> 22 23 struct AtomicBitset { 24 uint32_t numBits; 25 uint32_t words[]; 26 }; 27 28 #define ATOMIC_BITSET_SZ(numbits) (sizeof(struct AtomicBitset) + ((numbits) + 31) / 8) 29 #define ATOMIC_BITSET_DECL(nam, numbits, extra_keyword) extra_keyword uint8_t _##nam##_store [ATOMIC_BITSET_SZ(numbits)] __attribute__((aligned(4))); extra_keyword struct AtomicBitset *nam = (struct AtomicBitset*)_##nam##_store 30 31 32 void atomicBitsetInit(struct AtomicBitset *set, uint32_t numBits); 33 uint32_t atomicBitsetGetNumBits(const struct AtomicBitset *set); 34 bool atomicBitsetGetBit(const struct AtomicBitset *set, uint32_t num); 35 void atomicBitsetClearBit(struct AtomicBitset *set, uint32_t num); 36 int32_t atomicBitsetFindClearAndSet(struct AtomicBitset *set); 37 38 #endif 39 40 41