2 * Copyright 2017 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #include <folly/futures/ManualExecutor.h>
25 void ManualExecutor::add(Func callback) {
26 std::lock_guard<std::mutex> lock(lock_);
27 funcs_.emplace(std::move(callback));
31 size_t ManualExecutor::run() {
37 std::lock_guard<std::mutex> lock(lock_);
39 while (!scheduledFuncs_.empty()) {
40 auto& sf = scheduledFuncs_.top();
43 funcs_.emplace(sf.moveOutFunc());
44 scheduledFuncs_.pop();
50 for (count = 0; count < n; count++) {
52 std::lock_guard<std::mutex> lock(lock_);
57 // Balance the semaphore so it doesn't grow without bound
58 // if nobody is calling wait().
59 // This may fail (with EAGAIN), that's fine.
62 func = std::move(funcs_.front());
71 void ManualExecutor::wait() {
74 std::lock_guard<std::mutex> lock(lock_);
83 void ManualExecutor::advanceTo(TimePoint const& t) {