35 lines
1.3 KiB
C++
35 lines
1.3 KiB
C++
// 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"
|