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rework ForEachClient to use concepts instead of SFINAE

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Lion Kortlepel
2022-11-13 13:35:25 +01:00
parent d7369c3bc5
commit 844b64f5d9
3 changed files with 49 additions and 29 deletions
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43
include/TServer.h
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@@ -4,9 +4,11 @@
#include "IterationDecision.h"
#include "RWMutex.h"
#include "TScopedTimer.h"
#include <concepts>
#include <functional>
#include <memory>
#include <mutex>
#include <type_traits>
#include <unordered_set>
#include "BoostAliases.h"
@@ -15,6 +17,21 @@ class TClient;
class TNetwork;
class TPPSMonitor;
// clang-format doesn't know how to deal with concepts
// clang-format off
template <typename FnT>
concept ForEachHandlerWithDecision = requires(FnT Fn, const std::shared_ptr<TClient>& Ptr) {
requires std::invocable<FnT, const std::shared_ptr<TClient>&> ;
{ std::invoke(Fn, Ptr) } -> std::convertible_to<IterationDecision>;
};
template <typename FnT>
concept ForEachHandler = requires(FnT Fn, const std::shared_ptr<TClient>& Ptr) {
requires std::invocable <FnT, const std::shared_ptr<TClient>&> ;
{ std::invoke(Fn, Ptr) } -> std::same_as<void>;
};
// clang-format on
class TServer final {
public:
using TClientSet = std::unordered_set<std::shared_ptr<TClient>>;
@@ -26,7 +43,31 @@ public:
// in Fn, return true to continue, return false to break
[[deprecated("use ForEachClient instead")]] void ForEachClientWeak(const std::function<bool(std::weak_ptr<TClient>)>& Fn);
// in Fn, return Break or Continue
void ForEachClient(const std::function<IterationDecision(const std::shared_ptr<TClient>&)>& Fn);
template <ForEachHandlerWithDecision FnT>
void ForEachClient(FnT Fn) {
decltype(mClients) Clients;
{
ReadLock lock(mClientsMutex);
Clients = mClients;
}
for (auto& Client : Clients) {
IterationDecision Decision = std::invoke(Fn, Client);
if (Decision == IterationDecision::Break) {
break;
}
}
}
template <ForEachHandler FnT>
void ForEachClient(FnT Fn) {
decltype(mClients) Clients;
{
ReadLock lock(mClientsMutex);
Clients = mClients;
}
for (auto& Client : Clients) {
std::invoke(Fn, Client);
}
}
size_t ClientCount() const;
static void GlobalParser(const std::weak_ptr<TClient>& Client, std::vector<uint8_t>&& Packet, TNetwork& Network);