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#pragma once
#include "impl.h"
#include "network.h"
#include <util/network/address.h>
#include <util/network/socket.h>
#include <util/system/mutex.h>
extern void SetCommonSockOpts(SOCKET sock, const struct sockaddr* sa = nullptr);
class TSocketPool;
class TPooledSocket {
class TImpl: public TIntrusiveListItem<TImpl>, public TSimpleRefCount<TImpl, TImpl> {
public:
TImpl(SOCKET fd, TSocketPool* pool) noexcept
: Pool_(pool)
, IsKeepAlive_(false)
, Fd_(fd)
{
Touch();
}
static void Destroy(TImpl* impl) noexcept {
impl->DoDestroy();
}
void DoDestroy() noexcept {
if (!Closed() && IsKeepAlive() && IsInGoodState()) {
ReturnToPool();
} else {
delete this;
}
}
bool IsKeepAlive() const noexcept {
return IsKeepAlive_;
}
void SetKeepAlive(bool ka) {
::SetKeepAlive(Fd_, ka);
IsKeepAlive_ = ka;
}
SOCKET Socket() const noexcept {
return Fd_;
}
bool Closed() const noexcept {
return Fd_.Closed();
}
void Close() noexcept {
Fd_.Close();
}
bool IsInGoodState() const noexcept {
int err = 0;
socklen_t len = sizeof(err);
getsockopt(Fd_, SOL_SOCKET, SO_ERROR, (char*)&err, &len);
return !err;
}
bool IsOpen() const noexcept {
return IsInGoodState() && IsNotSocketClosedByOtherSide(Fd_);
}
void Touch() noexcept {
TouchTime_ = TInstant::Now();
}
const TInstant& LastTouch() const noexcept {
return TouchTime_;
}
private:
inline void ReturnToPool() noexcept;
private:
TSocketPool* Pool_;
bool IsKeepAlive_;
TSocketHolder Fd_;
TInstant TouchTime_;
};
friend class TSocketPool;
public:
TPooledSocket()
: Impl_(nullptr)
{
}
TPooledSocket(TImpl* impl)
: Impl_(impl)
{
}
~TPooledSocket() {
if (UncaughtException() && !!Impl_) {
Close();
}
}
operator SOCKET() const noexcept {
return Impl_->Socket();
}
void SetKeepAlive(bool ka) {
Impl_->SetKeepAlive(ka);
}
void Close() noexcept {
Impl_->Close();
}
private:
TIntrusivePtr<TImpl> Impl_;
};
struct TConnectData {
TConnectData(TCont* cont, const TInstant& deadLine)
: Cont(cont)
, DeadLine(deadLine)
{
}
TConnectData(TCont* cont, const TDuration& timeOut)
: Cont(cont)
, DeadLine(TInstant::Now() + timeOut)
{
}
TCont* Cont;
const TInstant DeadLine;
};
class TSocketPool {
friend class TPooledSocket::TImpl;
public:
typedef TAtomicSharedPtr<NAddr::IRemoteAddr> TAddrRef;
TSocketPool(int ip, int port)
: Addr_(new NAddr::TIPv4Addr(TIpAddress((ui32)ip, (ui16)port)))
{
}
TSocketPool(const TAddrRef& addr)
: Addr_(addr)
{
}
void EraseStale(const TInstant& maxAge) noexcept {
TSockets toDelete;
{
TGuard<TMutex> guard(Mutex_);
for (TSockets::TIterator it = Pool_.Begin(); it != Pool_.End();) {
if (it->LastTouch() < maxAge) {
toDelete.PushBack(&*(it++));
} else {
++it;
}
}
}
}
TPooledSocket Get(TConnectData* conn) {
TPooledSocket ret;
if (TPooledSocket::TImpl* alive = GetImpl()) {
ret = TPooledSocket(alive);
} else {
ret = AllocateMore(conn);
}
ret.Impl_->Touch();
return ret;
}
bool GetAlive(TPooledSocket& socket) {
if (TPooledSocket::TImpl* alive = GetImpl()) {
alive->Touch();
socket = TPooledSocket(alive);
return true;
}
return false;
}
private:
TPooledSocket::TImpl* GetImpl() {
TGuard<TMutex> guard(Mutex_);
while (!Pool_.Empty()) {
THolder<TPooledSocket::TImpl> ret(Pool_.PopFront());
if (ret->IsOpen()) {
return ret.Release();
}
}
return nullptr;
}
void Release(TPooledSocket::TImpl* impl) noexcept {
TGuard<TMutex> guard(Mutex_);
Pool_.PushFront(impl);
}
TPooledSocket AllocateMore(TConnectData* conn);
private:
TAddrRef Addr_;
using TSockets = TIntrusiveListWithAutoDelete<TPooledSocket::TImpl, TDelete>;
TSockets Pool_;
TMutex Mutex_;
};
inline void TPooledSocket::TImpl::ReturnToPool() noexcept {
Pool_->Release(this);
}
class TContIO: public IInputStream, public IOutputStream {
public:
TContIO(SOCKET fd, TCont* cont)
: Fd_(fd)
, Cont_(cont)
{
}
void DoWrite(const void* buf, size_t len) override {
NCoro::WriteI(Cont_, Fd_, buf, len).Checked();
}
size_t DoRead(void* buf, size_t len) override {
return NCoro::ReadI(Cont_, Fd_, buf, len).Checked();
}
SOCKET Fd() const noexcept {
return Fd_;
}
private:
SOCKET Fd_;
TCont* Cont_;
};
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