1// Copyright 2017 The Abseil Authors. 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// https://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14// 15// This file is an Akaros-specific part of spinlock_wait.cc 16 17#include <atomic> 18 19#include "absl/base/internal/scheduling_mode.h" 20 21extern "C" { 22 23ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockDelay( 24 std::atomic<uint32_t>* /* lock_word */, uint32_t /* value */, 25 int /* loop */, absl::base_internal::SchedulingMode /* mode */) { 26 // In Akaros, one must take care not to call anything that could cause a 27 // malloc(), a blocking system call, or a uthread_yield() while holding a 28 // spinlock. Our callers assume will not call into libraries or other 29 // arbitrary code. 30} 31 32ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockWake( 33 std::atomic<uint32_t>* /* lock_word */, bool /* all */) {} 34 35} // extern "C" 36