mirror of
https://github.com/MaskRay/ccls.git
synced 2024-11-23 08:05:07 +00:00
772f547065
This also changes the API used for reporting diagnostics, which will hopefully be more reliable. This requires reparsing the document, though, so it is much slower. We do this after reporting code completion though, so hopefully the performance delay is not too noticable.
52 lines
1.1 KiB
C++
52 lines
1.1 KiB
C++
#pragma once
|
|
|
|
#include <algorithm>
|
|
#include <condition_variable>
|
|
#include <memory>
|
|
#include <mutex>
|
|
|
|
// A object which can be stored and taken from atomically.
|
|
template <class T>
|
|
struct AtomicObject {
|
|
void Set(std::unique_ptr<T> t) {
|
|
std::lock_guard<std::mutex> lock(mutex_);
|
|
value_ = std::move(t);
|
|
cv_.notify_one();
|
|
}
|
|
|
|
void SetIfEmpty(std::unique_ptr<T> t) {
|
|
std::lock_guard<std::mutex> lock(mutex_);
|
|
if (value_)
|
|
return;
|
|
|
|
value_ = std::move(t);
|
|
cv_.notify_one();
|
|
}
|
|
|
|
std::unique_ptr<T> Take() {
|
|
std::unique_lock<std::mutex> lock(mutex_);
|
|
while (!value_) {
|
|
// release lock as long as the wait and reaquire it afterwards.
|
|
cv_.wait(lock);
|
|
}
|
|
|
|
return std::move(value_);
|
|
}
|
|
|
|
template <typename TAction>
|
|
void WithLock(TAction action) {
|
|
std::unique_lock<std::mutex> lock(mutex_);
|
|
bool had_value = !!value_;
|
|
action(value_);
|
|
bool has_value = !!value_;
|
|
|
|
if (had_value != has_value)
|
|
cv_.notify_one();
|
|
}
|
|
|
|
private:
|
|
std::unique_ptr<T> value_;
|
|
mutable std::mutex mutex_;
|
|
std::condition_variable cv_;
|
|
};
|