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#include "defaults.h"
#include "event.h"
#include "mutex.h"
#include "condvar.h"
#ifdef _win_
#include "winint.h"
#endif
#include <atomic>
class TSystemEvent::TEvImpl: public TAtomicRefCount<TSystemEvent::TEvImpl> {
public:
#ifdef _win_
inline TEvImpl(ResetMode rmode) {
cond = CreateEvent(nullptr, rmode == rManual ? true : false, false, nullptr);
}
inline ~TEvImpl() {
CloseHandle(cond);
}
inline void Reset() noexcept {
ResetEvent(cond);
}
inline void Signal() noexcept {
SetEvent(cond);
}
inline bool WaitD(TInstant deadLine) noexcept {
if (deadLine == TInstant::Max()) {
return WaitForSingleObject(cond, INFINITE) == WAIT_OBJECT_0;
}
const TInstant now = Now();
if (now < deadLine) {
//TODO
return WaitForSingleObject(cond, (deadLine - now).MilliSeconds()) == WAIT_OBJECT_0;
}
return (WaitForSingleObject(cond, 0) == WAIT_OBJECT_0);
}
#else
inline TEvImpl(ResetMode rmode)
: Manual(rmode == rManual ? true : false)
{
}
inline void Signal() noexcept {
if (Manual && Signaled.load(std::memory_order_acquire)) {
return; // shortcut
}
with_lock (Mutex) {
Signaled.store(true, std::memory_order_release);
}
if (Manual) {
Cond.BroadCast();
} else {
Cond.Signal();
}
}
inline void Reset() noexcept {
Signaled.store(false, std::memory_order_release);
}
inline bool WaitD(TInstant deadLine) noexcept {
if (Manual && Signaled.load(std::memory_order_acquire)) {
return true; // shortcut
}
bool resSignaled = true;
with_lock (Mutex) {
while (!Signaled.load(std::memory_order_acquire)) {
if (!Cond.WaitD(Mutex, deadLine)) {
resSignaled = Signaled.load(std::memory_order_acquire); // timed out, but Signaled could have been set
break;
}
}
if (!Manual) {
Signaled.store(false, std::memory_order_release);
}
}
return resSignaled;
}
#endif
private:
#ifdef _win_
HANDLE cond;
#else
TCondVar Cond;
TMutex Mutex;
std::atomic<bool> Signaled = false;
bool Manual;
#endif
};
TSystemEvent::TSystemEvent(ResetMode rmode)
: EvImpl_(new TEvImpl(rmode))
{
}
TSystemEvent::TSystemEvent(const TSystemEvent& other) noexcept
: EvImpl_(other.EvImpl_)
{
}
TSystemEvent& TSystemEvent::operator=(const TSystemEvent& other) noexcept {
EvImpl_ = other.EvImpl_;
return *this;
}
TSystemEvent::~TSystemEvent() = default;
void TSystemEvent::Reset() noexcept {
EvImpl_->Reset();
}
void TSystemEvent::Signal() noexcept {
EvImpl_->Signal();
}
bool TSystemEvent::WaitD(TInstant deadLine) noexcept {
return EvImpl_->WaitD(deadLine);
}
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