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Allows fast iteration of C++ changes without restarting the application. To use, select the "Live Coding (Experimental)" mode from the drop down menu next to the editor's compile button, or type "LiveCoding" into the console for a monolithic build. Press Ctrl+Alt+F11 to find changes and compile.
Changes vs standalone Live++ version:
* UBT is used to execute builds. This allows standard UE4 adaptive unity mode, allows us to reuse object files when we do regular builds, supports using any build executor allowed by UBT (XGE, SNDBS, etc..).
* Adding new source files is supported.
* Custom visualizer for FNames is supported via a weakly linked symbol in a static library (Engine/Extras/NatvisHelpers).
* Settings are exposed in the editor's project settings dialog.
* Standalone application has been rewritten as a Slate app ("LiveCodingConsole"). There is an additional option to start the program as hidden, where it will not be visible until Ctrl+Alt+F11 is hit. Similarly, closing the window will hide it instead of closing the application.
* Does not require a standalone licensed version of Live++.
Known issues:
* Does not currently support class layout changes / object reinstancing
#rb none
[FYI] Marc.Audy, Stefan.Boberg, Nick.Penwarden
#jira
#ROBOMERGE-SOURCE: CL 5304722 in //UE4/Release-4.22/...
#ROBOMERGE-BOT: RELEASE (Release-4.22 -> Main)
[CL 5309051 by ben marsh in Main branch]
111 lines
2.9 KiB
C++
111 lines
2.9 KiB
C++
// Copyright 2011-2019 Molecular Matters GmbH, all rights reserved.
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#include "LC_ClientCommandThread.h"
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#include "LC_Event.h"
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#include "LC_CommandMap.h"
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#include "LC_CriticalSection.h"
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#include "LC_ClientCommandActions.h"
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#include "LC_DuplexPipeClient.h"
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#include "LC_Process.h"
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#include "LC_HeartBeat.h"
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ClientCommandThread::ClientCommandThread(DuplexPipeClient* pipeClient)
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: m_thread(INVALID_HANDLE_VALUE)
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, m_pipe(pipeClient)
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{
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}
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ClientCommandThread::~ClientCommandThread(void)
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{
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}
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unsigned int ClientCommandThread::Start(const std::wstring& processGroupName, Event* compilationEvent, Event* waitForStartEvent, CriticalSection* pipeAccessCS)
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{
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// spawn a thread that communicates with the server
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ThreadContext* context = new ThreadContext;
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context->thisInstance = this;
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context->processGroupName = processGroupName;
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context->compilationEvent = compilationEvent;
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context->waitForStartEvent = waitForStartEvent;
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context->pipeAccessCS = pipeAccessCS;
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m_thread = thread::Create(128u * 1024u, &ThreadProxy, context);
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return thread::GetId(m_thread);
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}
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void ClientCommandThread::Join(void)
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{
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if (m_thread != INVALID_HANDLE_VALUE)
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{
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thread::Join(m_thread);
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thread::Close(m_thread);
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}
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}
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unsigned int __stdcall ClientCommandThread::ThreadProxy(void* context)
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{
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thread::SetName("Live coding commands");
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ThreadContext* realContext = static_cast<ThreadContext*>(context);
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const unsigned int exitCode = realContext->thisInstance->ThreadFunction(realContext->processGroupName, realContext->compilationEvent, realContext->waitForStartEvent, realContext->pipeAccessCS);
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delete realContext;
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return exitCode;
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}
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unsigned int ClientCommandThread::ThreadFunction(const std::wstring& processGroupName, Event* compilationEvent, Event* waitForStartEvent, CriticalSection* pipeAccessCS)
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{
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waitForStartEvent->Wait();
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CommandMap commandMap;
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commandMap.RegisterAction<actions::LoadPatch>();
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commandMap.RegisterAction<actions::UnloadPatch>();
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commandMap.RegisterAction<actions::EnterSyncPoint>();
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commandMap.RegisterAction<actions::LeaveSyncPoint>();
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commandMap.RegisterAction<actions::CallEntryPoint>();
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commandMap.RegisterAction<actions::CallHooks>();
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commandMap.RegisterAction<actions::LogOutput>();
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commandMap.RegisterAction<actions::CompilationFinished>();
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HeartBeat heartBeat(processGroupName.c_str(), process::GetId());
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for (;;)
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{
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// wait for compilation to start
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while (!compilationEvent->WaitTimeout(10))
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{
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if (!m_pipe->IsValid())
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{
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// pipe was closed or is broken, bail out
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return 1u;
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}
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heartBeat.Store();
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}
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if (!m_pipe->IsValid())
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{
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// pipe was closed or is broken, bail out
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return 1u;
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}
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// lock critical section for accessing the pipe.
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// we need to make sure that other threads talking through the pipe don't use it at the same time.
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CriticalSection::ScopedLock lock(pipeAccessCS);
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m_pipe->SendCommandAndWaitForAck(commands::ReadyForCompilation {});
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commandMap.HandleCommands(m_pipe, nullptr);
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}
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return 0u;
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}
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