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#include "grpc_request.h"
namespace NGrpc {
const char* GRPC_USER_AGENT_HEADER = "user-agent";
class TStreamAdaptor: public IStreamAdaptor {
public:
TStreamAdaptor()
: StreamIsReady_(true)
{}
void Enqueue(std::function<void()>&& fn, bool urgent) override {
with_lock(Mtx_) {
if (!UrgentQueue_.empty() || !NormalQueue_.empty()) {
Y_VERIFY(!StreamIsReady_);
}
auto& queue = urgent ? UrgentQueue_ : NormalQueue_;
if (StreamIsReady_ && queue.empty()) {
StreamIsReady_ = false;
} else {
queue.push_back(std::move(fn));
return;
}
}
fn();
}
size_t ProcessNext() override {
size_t left = 0;
std::function<void()> fn;
with_lock(Mtx_) {
Y_VERIFY(!StreamIsReady_);
auto& queue = UrgentQueue_.empty() ? NormalQueue_ : UrgentQueue_;
if (queue.empty()) {
// Both queues are empty
StreamIsReady_ = true;
} else {
fn = std::move(queue.front());
queue.pop_front();
left = UrgentQueue_.size() + NormalQueue_.size();
}
}
if (fn)
fn();
return left;
}
private:
bool StreamIsReady_;
TList<std::function<void()>> NormalQueue_;
TList<std::function<void()>> UrgentQueue_;
TMutex Mtx_;
};
IStreamAdaptor::TPtr CreateStreamAdaptor() {
return std::make_unique<TStreamAdaptor>();
}
} // namespace NGrpc
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