/* * Copyright (c) 2019 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ #include <stdio.h> #include <assert.h> #include <stdlib.h> #include <stdbool.h> #include <string.h> #include "memory.h" #include "atom.h" #include "llvm-ADT/DenseSet.h" llvm::DenseSet<const char *> atoms{4096}; extern "C" { atom_t * atom_get(const char *s) { auto it = atoms.insert(s); if (it.second) { *it.first = xstrdup(s); } return reinterpret_cast<atom_t *>(*it.first); } atom_t * atom_get_consume(char *s) { auto it = atoms.insert(s); if (!it.second) { free(s); } return reinterpret_cast<atom_t *>(*it.first); } __attribute__((always_inline)) // let LTO know unsigned atom_hash(atom_t *atom) { unsigned long key = reinterpret_cast<unsigned long>(atom); key ^= key >> 4; #if __LP64__ key *= 0x8a970be7488fda55; key ^= __builtin_bswap64(key); #else key *= 0x5052acdb; key ^= __builtin_bswap32(key); #endif return static_cast<unsigned>(key); } } // extern "C"