hayodea
fc5ebb72b9
No longer uses CPS. We also found and documented a potential bug in the way we deal with disablePcloudData during detachDeviceReq.
96 lines
2.0 KiB
C++
96 lines
2.0 KiB
C++
#ifndef ADAPTERS_SMO_CPS_CALLBACK_AREQ_H
|
|
#define ADAPTERS_SMO_CPS_CALLBACK_AREQ_H
|
|
|
|
#include <boostAsioLinkageFix.h>
|
|
|
|
#include <atomic>
|
|
#include <coroutine>
|
|
#include <functional>
|
|
#include <memory>
|
|
|
|
#include <boost/asio/io_service.hpp>
|
|
#include <boost/asio/post.hpp>
|
|
#include <spinscale/cps/callback.h>
|
|
|
|
namespace smo {
|
|
namespace cpsBoundary {
|
|
|
|
/** Eager-start CPS callback -> coroutine adapter (mirrors
|
|
* PuppetThread::ViralThreadLifetimeMgmtInvoker).
|
|
*/
|
|
template <typename Result, typename CallbackFn, typename StartFn>
|
|
class CpsCallbackAReq
|
|
{
|
|
public:
|
|
struct AsyncState
|
|
{
|
|
std::atomic<bool> settled{false};
|
|
Result result{};
|
|
std::coroutine_handle<> callerSchedHandle;
|
|
};
|
|
|
|
CpsCallbackAReq(
|
|
boost::asio::io_service &resumeIoService,
|
|
StartFn startFn)
|
|
: asyncState(std::make_shared<AsyncState>()),
|
|
resumeIoService(resumeIoService)
|
|
{
|
|
startFn(sscl::cps::Callback<CallbackFn>{
|
|
nullptr,
|
|
[this](auto &&...args)
|
|
{
|
|
storeResult(std::forward<decltype(args)>(args)...);
|
|
signalSettledAndResumeCaller();
|
|
}});
|
|
}
|
|
|
|
bool await_ready() const noexcept
|
|
{
|
|
return asyncState->settled.load(std::memory_order_acquire);
|
|
}
|
|
|
|
bool await_suspend(std::coroutine_handle<> callerSchedHandle) noexcept
|
|
{
|
|
if (asyncState->settled.load(std::memory_order_acquire)) {
|
|
return false;
|
|
}
|
|
|
|
asyncState->callerSchedHandle = callerSchedHandle;
|
|
return true;
|
|
}
|
|
|
|
Result await_resume() noexcept
|
|
{
|
|
return asyncState->result;
|
|
}
|
|
|
|
private:
|
|
template <typename... Args>
|
|
void storeResult(Args &&...args)
|
|
{
|
|
asyncState->result = Result{std::forward<Args>(args)...};
|
|
}
|
|
|
|
void signalSettledAndResumeCaller() noexcept
|
|
{
|
|
asyncState->settled.store(true, std::memory_order_release);
|
|
|
|
std::coroutine_handle<> handle = asyncState->callerSchedHandle;
|
|
if (!handle) {
|
|
return;
|
|
}
|
|
|
|
boost::asio::post(
|
|
resumeIoService,
|
|
[handle]() { handle.resume(); });
|
|
}
|
|
|
|
std::shared_ptr<AsyncState> asyncState;
|
|
boost::asio::io_service &resumeIoService;
|
|
};
|
|
|
|
} // namespace cpsBoundary
|
|
} // namespace smo
|
|
|
|
#endif // ADAPTERS_SMO_CPS_CALLBACK_AREQ_H
|