1*71db0c75SAndroid Build Coastguard Worker //===-- Implementation header for rand utilities ----------------*- C++ -*-===// 2*71db0c75SAndroid Build Coastguard Worker // 3*71db0c75SAndroid Build Coastguard Worker // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*71db0c75SAndroid Build Coastguard Worker // See https://llvm.org/LICENSE.txt for license information. 5*71db0c75SAndroid Build Coastguard Worker // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*71db0c75SAndroid Build Coastguard Worker // 7*71db0c75SAndroid Build Coastguard Worker //===----------------------------------------------------------------------===// 8*71db0c75SAndroid Build Coastguard Worker 9*71db0c75SAndroid Build Coastguard Worker #ifndef LLVM_LIBC_SRC_STDLIB_RAND_UTIL_H 10*71db0c75SAndroid Build Coastguard Worker #define LLVM_LIBC_SRC_STDLIB_RAND_UTIL_H 11*71db0c75SAndroid Build Coastguard Worker 12*71db0c75SAndroid Build Coastguard Worker #include "src/__support/CPP/atomic.h" 13*71db0c75SAndroid Build Coastguard Worker #include "src/__support/macros/attributes.h" 14*71db0c75SAndroid Build Coastguard Worker #include "src/__support/macros/config.h" 15*71db0c75SAndroid Build Coastguard Worker 16*71db0c75SAndroid Build Coastguard Worker namespace LIBC_NAMESPACE_DECL { 17*71db0c75SAndroid Build Coastguard Worker 18*71db0c75SAndroid Build Coastguard Worker // The ISO C standard does not explicitly require thread-safe behavior for the 19*71db0c75SAndroid Build Coastguard Worker // generic `rand()` function. Some implementations expect it however, so we 20*71db0c75SAndroid Build Coastguard Worker // provide it here. 21*71db0c75SAndroid Build Coastguard Worker extern cpp::Atomic<unsigned long> rand_next; 22*71db0c75SAndroid Build Coastguard Worker 23*71db0c75SAndroid Build Coastguard Worker } // namespace LIBC_NAMESPACE_DECL 24*71db0c75SAndroid Build Coastguard Worker 25*71db0c75SAndroid Build Coastguard Worker #endif // LLVM_LIBC_SRC_STDLIB_RAND_UTIL_H 26