Manager of processes. More...

Public Member Functions
	ProcessManager ()
	Construct a ProcessManager instance. More...

void	registerProcess (Process *proc)
	Register process with process manager. More...

int	writePipe () const
	Retrieve the Process manager's write pipe. More...

const struct sigaction &	oldsa () const
	Retrive the old signal action data. More...

Static Public Member Functions
static ProcessManager *	instance ()
	Retrieve the Process manager instance. More...

Detailed Description

Manager of processes.

The ProcessManager singleton keeps track of all created Process instances, and manages the signal handling involved in terminating processes.

Constructor & Destructor Documentation

◆ ProcessManager()

libcamera::ProcessManager::ProcessManager ( )

Construct a ProcessManager instance.

The ProcessManager class is meant to only be instantiated once, by the CameraManager.

Member Function Documentation

◆ instance()

ProcessManager * libcamera::ProcessManager::instance ( )

static

Retrieve the Process manager instance.

The ProcessManager is constructed by the CameraManager. This function shall be used to retrieve the single instance of the manager.

Returns: The Process manager instance

◆ oldsa()

const struct sigaction & libcamera::ProcessManager::oldsa ( ) const

Retrive the old signal action data.

This function is meant only to be used by the static signal handler.

Returns: The old signal action data

◆ registerProcess()

void libcamera::ProcessManager::registerProcess ( Process * proc )

Register process with process manager.

Parameters

[in] proc Process to register

This function registers the proc with the process manager. It shall be called by the parent process after successfully forking, in order to let the parent signal process termination.

◆ writePipe()

int libcamera::ProcessManager::writePipe ( ) const

Retrieve the Process manager's write pipe.