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