| // Copyright 2017 The Abseil Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // https://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| // This file is an Akaros-specific part of spinlock_wait.cc |
| |
| #include <atomic> |
| |
| #include "absl/base/internal/scheduling_mode.h" |
| |
| extern "C" { |
| |
| ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockDelay( |
| std::atomic<uint32_t>* /* lock_word */, uint32_t /* value */, |
| int /* loop */, absl::base_internal::SchedulingMode /* mode */) { |
| // In Akaros, one must take care not to call anything that could cause a |
| // malloc(), a blocking system call, or a uthread_yield() while holding a |
| // spinlock. Our callers assume will not call into libraries or other |
| // arbitrary code. |
| } |
| |
| ABSL_ATTRIBUTE_WEAK void AbslInternalSpinLockWake( |
| std::atomic<uint32_t>* /* lock_word */, bool /* all */) {} |
| |
| } // extern "C" |
