VuoRuntimeState Class Reference

Description

Encapsulates the state of the runtime when running a single composition, including both state that is preserved across live-coding reloads and state that only lives for a single start-stop of the composition.

Public Member Functions
	VuoRuntimeState (void *zmqContext, const char *controlUrl, const char *telemetryUrl, bool isPaused, pid_t runnerPid, int runnerPipe, bool continueIfRunnerDies, const char *workingDirectory, void *compositionBinaryHandle, VuoRuntimePersistentState *persistentState)
	Creates a runtime state instance, updates its references to symbols defined in the composition binary, and opens a connection between it and the runner.
	~VuoRuntimeState (void)
	Destructor.
void	updateCompositionSymbols (void *compositionBinaryHandle)
	Updates references to symbols defined in the composition's generated code.
bool	isPaused (void)
	Returns true if the composition is currently paused.
bool	isStopped (void)
	Returns true if the composition hasn't started yet or has been stopped.
pid_t	getRunnerPid (void)
	Returns the process ID of the runner that started the composition.
void	disableTermination (void)
	Temporarily disables automatic termination.
void	enableTermination (void)
	Resumes automatic termination.
void	startComposition (void)
	Initializes the composition's node and port data, starts the composition's triggers firing if the composition is supposed to be unpaused initially, and starts communicating with the runner.
void	pauseComposition (void)
	Pauses firing of the composition's triggers.
void	unpauseComposition (void)
	Resumes firing of the composition's triggers.
void	stopCompositionAsOrderedByRunner (bool isBeingReplaced, int timeoutInSeconds)
	Stops the composition, either for a live-coding reload or permanently, as a result of a stop message from the runner.
void	stopCompositionAsOrderedByComposition (void)
	Nodes/libraries can call this function (via its wrapper, VuoStopComposition) to initiate a clean shutdown of the composition.
void	breakOutOfEventLoop (void)
	Carries out the final stage of stopping the composition, which entails interrupting the event loop.

Public Attributes
VuoRuntimePersistentState *	persistentState
	State preserved across live-coding reloads.

Constructor & Destructor Documentation

VuoRuntimeState::VuoRuntimeState	(	void *	zmqContext,
		const char *	controlUrl,
		const char *	telemetryUrl,
		bool	isPaused,
		pid_t	runnerPid,
		int	runnerPipe,
		bool	continueIfRunnerDies,
		const char *	workingDirectory,
		void *	compositionBinaryHandle,
		VuoRuntimePersistentState *	persistentState
	)

Creates a runtime state instance, updates its references to symbols defined in the composition binary, and opens a connection between it and the runner.

Does not take ownership of persistentState.

Exceptions

std::runtime_error

One of the symbols was not found in the composition binary.

VuoRuntimeState::~VuoRuntimeState

(

void

)

Destructor.

Member Function Documentation

void VuoRuntimeState::breakOutOfEventLoop

(

void

)

Carries out the final stage of stopping the composition, which entails interrupting the event loop.

AFter this function has returned, isStopped() returns true.

void VuoRuntimeState::disableTermination

(

void

)

Temporarily disables automatic termination.

When a composition is asked to shut down, a watchdog timer waits a few seconds then force-quits if it hasn't cleanly shut down by then. This disables that watchdog.

void VuoRuntimeState::enableTermination

(

void

)

Resumes automatic termination.

pid_t VuoRuntimeState::getRunnerPid

(

void

)

Returns the process ID of the runner that started the composition.

bool VuoRuntimeState::isPaused

(

void

)

Returns true if the composition is currently paused.

bool VuoRuntimeState::isStopped

(

void

)

Returns true if the composition hasn't started yet or has been stopped.

void VuoRuntimeState::pauseComposition

(

void

)

Pauses firing of the composition's triggers.

void VuoRuntimeState::startComposition

(

void

)

Initializes the composition's node and port data, starts the composition's triggers firing if the composition is supposed to be unpaused initially, and starts communicating with the runner.

void VuoRuntimeState::stopCompositionAsOrderedByComposition

(

void

)

Nodes/libraries can call this function (via its wrapper, VuoStopComposition) to initiate a clean shutdown of the composition.

It's also called if the VuoRunner dies, the composition is still running, and VuoRunner has requested that the composition be stopped when it dies.

void VuoRuntimeState::stopCompositionAsOrderedByRunner	(	bool	isBeingReplaced,
		int	timeoutInSeconds
	)

Stops the composition, either for a live-coding reload or permanently, as a result of a stop message from the runner.

void VuoRuntimeState::unpauseComposition

(

void

)

Resumes firing of the composition's triggers.

void VuoRuntimeState::updateCompositionSymbols

(

void *

compositionBinaryHandle

)

Updates references to symbols defined in the composition's generated code.

Exceptions

std::runtime_error

One of the symbols was not found in the composition binary.

Member Data Documentation

VuoRuntimePersistentState* VuoRuntimeState::persistentState

State preserved across live-coding reloads.

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The documentation for this class was generated from the following files:

• runtime/VuoRuntimeState.hh
• runtime/VuoRuntimeState.cc