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// Copyright 2016 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <tuple>
#include "core/hle/kernel/client_port.h"
#include "core/hle/kernel/client_session.h"
#include "core/hle/kernel/handle_table.h"
#include "core/hle/kernel/hle_ipc.h"
#include "core/hle/kernel/process.h"
#include "core/hle/kernel/server_session.h"
#include "core/hle/kernel/session.h"
#include "core/hle/kernel/thread.h"
namespace Kernel {
ServerSession::ServerSession() = default;
ServerSession::~ServerSession() {
// This destructor will be called automatically when the last ServerSession handle is closed by
// the emulated application.
// Decrease the port's connection count.
if (parent->port)
parent->port->active_sessions--;
// TODO(Subv): Wake up all the ClientSession's waiting threads and set
// the SendSyncRequest result to 0xC920181A.
parent->server = nullptr;
}
ResultVal<SharedPtr<ServerSession>> ServerSession::Create(std::string name) {
SharedPtr<ServerSession> server_session(new ServerSession);
server_session->name = std::move(name);
server_session->parent = nullptr;
return MakeResult(std::move(server_session));
}
bool ServerSession::ShouldWait(Thread* thread) const {
// Closed sessions should never wait, an error will be returned from svcReplyAndReceive.
if (parent->client == nullptr)
return false;
// Wait if we have no pending requests, or if we're currently handling a request.
return pending_requesting_threads.empty() || currently_handling != nullptr;
}
void ServerSession::Acquire(Thread* thread) {
ASSERT_MSG(!ShouldWait(thread), "object unavailable!");
// We are now handling a request, pop it from the stack.
// TODO(Subv): What happens if the client endpoint is closed before any requests are made?
ASSERT(!pending_requesting_threads.empty());
currently_handling = pending_requesting_threads.back();
pending_requesting_threads.pop_back();
}
ResultCode ServerSession::HandleSyncRequest(SharedPtr<Thread> thread) {
// The ServerSession received a sync request, this means that there's new data available
// from its ClientSession, so wake up any threads that may be waiting on a svcReplyAndReceive or
// similar.
// If this ServerSession has an associated HLE handler, forward the request to it.
ResultCode result{RESULT_SUCCESS};
if (hle_handler != nullptr) {
// Attempt to translate the incoming request's command buffer.
ResultCode translate_result = TranslateHLERequest(this);
if (translate_result.IsError())
return translate_result;
Kernel::HLERequestContext context(this);
u32* cmd_buf = (u32*)Memory::GetPointer(Kernel::GetCurrentThread()->GetTLSAddress());
context.PopulateFromIncomingCommandBuffer(cmd_buf, *Kernel::g_current_process,
Kernel::g_handle_table);
result = hle_handler->HandleSyncRequest(context);
} else {
// Add the thread to the list of threads that have issued a sync request with this
// server.
pending_requesting_threads.push_back(std::move(thread));
}
// If this ServerSession does not have an HLE implementation, just wake up the threads waiting
// on it.
WakeupAllWaitingThreads();
return result;
}
ServerSession::SessionPair ServerSession::CreateSessionPair(const std::string& name,
SharedPtr<ClientPort> port) {
auto server_session = ServerSession::Create(name + "_Server").Unwrap();
SharedPtr<ClientSession> client_session(new ClientSession);
client_session->name = name + "_Client";
std::shared_ptr<Session> parent(new Session);
parent->client = client_session.get();
parent->server = server_session.get();
parent->port = port;
client_session->parent = parent;
server_session->parent = parent;
return std::make_tuple(std::move(server_session), std::move(client_session));
}
ResultCode TranslateHLERequest(ServerSession* server_session) {
// TODO(Subv): Implement this function once multiple concurrent processes are supported.
return RESULT_SUCCESS;
}
} // namespace Kernel
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