TSDuck v3.45-4725
MPEG Transport Stream Toolkit
Loading...
Searching...
No Matches
ts::ReactiveBase Class Reference

Virtual base class for reactive classes in a Reactor environment. More...

#include <tsReactiveBase.h>

Inheritance diagram for ts::ReactiveBase:
Collaboration diagram for ts::ReactiveBase:

Public Member Functions

 ReactiveBase (Reactor &reactor, Object *owner=nullptr)
 Constructor.
 
virtual ~ReactiveBase () override
 Destructor.
 
bool isOwned ()
 Check if the object is owned.
 
template<class OBJECT >
requires std::derived_from<OBJECT, ts::Object>
bool isOwned ()
 Check if the object is owned by an object of a given type.
 
bool muteReport (bool mute)
 Temporarily mute the associated report.
 
Objectowner ()
 Get the address of the optional "owner" object which was specified in the constructor.
 
template<class OBJECT >
requires std::derived_from<OBJECT, ts::Object>
OBJECT * owner ()
 Get the address of the "owner" object which was specified in the constructor.
 
Reactorreactor ()
 Get a reference to the associated reactor.
 
Reportreport () const
 Access the Report which is associated with this object.
 
ReportsetReport (Report *report)
 Associate this object with another Report to log errors.
 
ReporterBasesetReport (ReporterBase *delegate)
 Associate this object with another ReporterBase to log errors.
 
bool signalQueuedOperations ()
 Trigger the execution of processQueuedOperations() in the context of a Reactor handler.
 

Static Public Member Functions

static int SilentLevel (bool silent)
 Compute a log severity level from a "silent" parameter.
 

Protected Member Functions

void deactivateQueuedOperations (bool silent)
 Deactivate the execution of processQueuedOperations() in the context of a Reactor handler.
 
virtual void handleAsynchronousIO (Reactor &reactor, EventId id, NonBlockingDevice::IOSB &iosb, size_t io_size)
 Handle an asynchronous I/O completion event in a Reactor.
 
virtual void handleReadReady (Reactor &reactor, EventId id, int error_code)
 Handle a read-ready event in a Reactor.
 
virtual void handleTimer (Reactor &reactor, EventId id)
 Handle a timer in a Reactor.
 
virtual void handleUserEvent (Reactor &, EventId) override
 Handle a user-defined event in a Reactor.
 
virtual void handleWriteReady (Reactor &reactor, EventId id, int error_code)
 Handle a write-ready event in a Reactor.
 
virtual void processQueuedOperations ()
 This virtual method processes operations in the context of a Reactor handler.
 

Detailed Description

Virtual base class for reactive classes in a Reactor environment.

Constructor & Destructor Documentation

◆ ReactiveBase()

ts::ReactiveBase::ReactiveBase ( Reactor reactor,
Object owner = nullptr 
)

Constructor.

Parameters
[in,out]reactorAssociated reactor. The reactor object must remain valid as long as this object is valid.
[in]ownerOptional address of an "owner" object, typically an instance of class containing this object.

Member Function Documentation

◆ reactor()

Reactor & ts::ReactiveBase::reactor ( )
inline

Get a reference to the associated reactor.

Returns
A reference to the associated reactor.

◆ signalQueuedOperations()

bool ts::ReactiveBase::signalQueuedOperations ( )

Trigger the execution of processQueuedOperations() in the context of a Reactor handler.

Create if necessary and then signal a dedicated user event.

Returns
True on success, false on error.

◆ deactivateQueuedOperations()

void ts::ReactiveBase::deactivateQueuedOperations ( bool  silent)
protected

Deactivate the execution of processQueuedOperations() in the context of a Reactor handler.

Deactivate and delete the dedicated user event.

Parameters
[in]silentIf true, do not report errors through the logger.

◆ processQueuedOperations()

virtual void ts::ReactiveBase::processQueuedOperations ( )
protectedvirtual

This virtual method processes operations in the context of a Reactor handler.

This is dedicated to operations which must be serialized from an application perspective. These operations are typically queued when triggered from a method which is called by the application. When the reactor processes events, we are sure that the application is not executing a handler. The default implementation does nothing. A subclass should override it if it calls signalQueuedOperations().

Reimplemented in ts::ReactiveTCPConnection, and ts::ReactiveTLSConnection.

◆ handleUserEvent()

virtual void ts::ReactiveBase::handleUserEvent ( Reactor reactor,
EventId  id 
)
overrideprotectedvirtual

Handle a user-defined event in a Reactor.

Parameters
[in,out]reactorReactor into which the handler is invoked.
[in]idId of the event which was signaled.

Reimplemented from ts::ReactorHandlerInterface.

◆ report()

Report & ts::ReporterBase::report ( ) const
inherited

Access the Report which is associated with this object.

Can be called from another thread only if the Report object is thread-safe.

Returns
A reference to the associated report.

◆ setReport() [1/2]

Report * ts::ReporterBase::setReport ( Report report)
inherited

Associate this object with another Report to log errors.

Parameters
[in]reportWhere to report errors. The report object must remain valid as long as this object exists or setReport() is used with another Report object. If report is null, log messages are discarded.
Returns
The address of the previous Report object or a null pointer if there was none.

◆ setReport() [2/2]

ReporterBase * ts::ReporterBase::setReport ( ReporterBase delegate)
inherited

Associate this object with another ReporterBase to log errors.

Parameters
[in]delegateUse the report of another ReporterBase. If delegate is null, the previous explicit Report is used..
Returns
The address of the previous ReporterBase object or a null pointer if there was none.

◆ muteReport()

bool ts::ReporterBase::muteReport ( bool  mute)
inherited

Temporarily mute the associated report.

Parameters
[in]muteIt true, report() will return a null report (log messages are discarded), until muteReport() is invoked again with mute set to false.
Returns
Previous state of the mute field.

◆ SilentLevel()

static int ts::ReporterBase::SilentLevel ( bool  silent)
inlinestaticinherited

Compute a log severity level from a "silent" parameter.

Some subclass methods have a "silent" parameter to avoid reporting errors which may be insignificant, typically when closing a device after an error, in which case the close operation may produce other errors if the previous error left the device in an inconsistent state. While those errors should not be displayed as errors, we still display them at debug level.

Parameters
[in]silentIf true, do not report errors, report debug messages instead.
Returns
Error when silent is false, Debug otherwise.

◆ owner() [1/2]

Object * ts::OwnedObject::owner ( )
inlineinherited

Get the address of the optional "owner" object which was specified in the constructor.

Returns
Address of the "owner" object or a null pointer if there was none.

◆ owner() [2/2]

template<class OBJECT >
requires std::derived_from<OBJECT, ts::Object>
OBJECT * ts::OwnedObject::owner ( )
inherited

Get the address of the "owner" object which was specified in the constructor.

This template version requires that the owner objet is set and of type OBJECT, or some subclass of it. If there is no owner object or if it is not compatible with the template class OBJECT, this is a fatal error and the application is terminated.

Template Parameters
OBJECTA subclass of Object
Returns
Address of the "owner" object or a null pointer if there was none.

◆ isOwned() [1/2]

bool ts::OwnedObject::isOwned ( )
inlineinherited

Check if the object is owned.

Returns
True if this object has an owner, false otherwise.

◆ isOwned() [2/2]

template<class OBJECT >
requires std::derived_from<OBJECT, ts::Object>
bool ts::OwnedObject::isOwned ( )
inlineinherited

Check if the object is owned by an object of a given type.

Template Parameters
OBJECTA subclass of Object
Returns
True if this object has an owner by an object of type OBJECT, false otherwise.

◆ handleTimer()

virtual void ts::ReactorHandlerInterface::handleTimer ( Reactor reactor,
EventId  id 
)
virtualinherited

Handle a timer in a Reactor.

Parameters
[in,out]reactorReactor into which the handler is invoked.
[in]idId of the timer which expires.

◆ handleReadReady()

virtual void ts::ReactorHandlerInterface::handleReadReady ( Reactor reactor,
EventId  id,
int  error_code 
)
virtualinherited

Handle a read-ready event in a Reactor.

This handler is only invoked in the non-blocking I/O model.

Parameters
[in,out]reactorReactor into which the handler is invoked.
[in]idId of the event which was signaled.
[in]error_codeSystem-specific error code, zero on success, SYS_ERROR in case of unknown error.

Reimplemented in ts::ReactiveTCPConnection.

◆ handleWriteReady()

virtual void ts::ReactorHandlerInterface::handleWriteReady ( Reactor reactor,
EventId  id,
int  error_code 
)
virtualinherited

Handle a write-ready event in a Reactor.

This handler is only invoked in the non-blocking I/O model.

Parameters
[in,out]reactorReactor into which the handler is invoked.
[in]idId of the event which was signaled.
[in]error_codeSystem-specific error code, zero on success, SYS_ERROR in case of unknown error.

Reimplemented in ts::ReactiveTCPConnection.

◆ handleAsynchronousIO()

virtual void ts::ReactorHandlerInterface::handleAsynchronousIO ( Reactor reactor,
EventId  id,
NonBlockingDevice::IOSB iosb,
size_t  io_size 
)
virtualinherited

Handle an asynchronous I/O completion event in a Reactor.

This handler is only invoked in the asynchronous I/O model.

Parameters
[in,out]reactorReactor into which the handler is invoked.
[in]idId of the event which was signaled.
[in,out]iosbIOSB structure which was used when the asynchronous I/O was started. A system-specific error code is in iosb, SYS_CANCELED if the I/O was canceled before completion.
[in]io_sizeSize of the I/O in bytes.

Reimplemented in ts::ReactiveTCPConnection.


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