Handles synchronous and a-synchronous timer events.
You can use this class in one of the following ways:
Minimum timeout interval is defined in TSystem::ESysConstants as kItimerResolution
(currently 10 ms).
Signal/slots example:
To emit the Timeout signal repeatedly with minimum timeout:
Public Member Functions | |
TTimer (const char *command, Long_t milliSec, Bool_t mode=kTRUE) | |
Create timer that times out in ms milliseconds. | |
TTimer (Long_t milliSec=0, Bool_t mode=kTRUE) | |
Create timer that times out in ms milliseconds. | |
TTimer (TObject *obj, Long_t milliSec, Bool_t mode=kTRUE) | |
Create timer that times out in ms milliseconds. | |
virtual | ~TTimer () |
void | Add () |
Bool_t | CheckTimer (const TTime &now) |
Check if timer timed out. | |
TTime | GetAbsTime () const |
const char * | GetCommand () const |
TObject * | GetObject () |
TTime | GetTime () const |
UInt_t | GetTimerID () |
Bool_t | HasTimedOut () const |
Bool_t | IsAsync () const |
Bool_t | IsInterruptingSyscalls () const |
Bool_t | IsSync () const |
virtual Bool_t | Notify () |
Notify when timer times out. | |
void | Remove () |
void | Reset () |
Reset the timer. | |
void | SetCommand (const char *command) |
Set the interpreter command to be executed at time out. | |
void | SetInterruptSyscalls (Bool_t set=kTRUE) |
When the argument is true the a-synchronous timer (SIGALRM) signal handler is set so that interrupted syscalls will not be restarted by the kernel. | |
void | SetObject (TObject *object) |
Set the object to be notified at time out. | |
void | SetTime (Long_t milliSec) |
void | SetTimerID (UInt_t id=0) |
virtual void | Start (Long_t milliSec=-1, Bool_t singleShot=kFALSE) |
Starts the timer with a milliSec timeout. | |
virtual void | Stop () |
virtual void | Timeout () |
virtual void | TurnOff () |
Remove timer from system timer list. | |
virtual void | TurnOn () |
Add the timer to the system timer list. | |
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TSysEvtHandler () | |
virtual | ~TSysEvtHandler () |
void | Activate () |
Activate a system event handler. | |
virtual void | Activated () |
virtual void | Added () |
void | DeActivate () |
De-activate a system event handler. | |
virtual void | DeActivated () |
Bool_t | IsActive () const |
virtual void | Notified () |
virtual void | Removed () |
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TObject () | |
TObject constructor. | |
TObject (const TObject &object) | |
TObject copy ctor. | |
virtual | ~TObject () |
TObject destructor. | |
void | AbstractMethod (const char *method) const |
Use this method to implement an "abstract" method that you don't want to leave purely abstract. | |
virtual void | AppendPad (Option_t *option="") |
Append graphics object to current pad. | |
virtual void | Browse (TBrowser *b) |
Browse object. May be overridden for another default action. | |
ULong_t | CheckedHash () |
Check and record whether this class has a consistent Hash/RecursiveRemove setup (*) and then return the regular Hash value for this object. | |
virtual const char * | ClassName () const |
Returns name of class to which the object belongs. | |
virtual void | Clear (Option_t *="") |
virtual TObject * | Clone (const char *newname="") const |
Make a clone of an object using the Streamer facility. | |
virtual Int_t | Compare (const TObject *obj) const |
Compare abstract method. | |
virtual void | Copy (TObject &object) const |
Copy this to obj. | |
virtual void | Delete (Option_t *option="") |
Delete this object. | |
virtual Int_t | DistancetoPrimitive (Int_t px, Int_t py) |
Computes distance from point (px,py) to the object. | |
virtual void | Draw (Option_t *option="") |
Default Draw method for all objects. | |
virtual void | DrawClass () const |
Draw class inheritance tree of the class to which this object belongs. | |
virtual TObject * | DrawClone (Option_t *option="") const |
Draw a clone of this object in the current selected pad for instance with: gROOT->SetSelectedPad(gPad) . | |
virtual void | Dump () const |
Dump contents of object on stdout. | |
virtual void | Error (const char *method, const char *msgfmt,...) const |
Issue error message. | |
virtual void | Execute (const char *method, const char *params, Int_t *error=0) |
Execute method on this object with the given parameter string, e.g. | |
virtual void | Execute (TMethod *method, TObjArray *params, Int_t *error=0) |
Execute method on this object with parameters stored in the TObjArray. | |
virtual void | ExecuteEvent (Int_t event, Int_t px, Int_t py) |
Execute action corresponding to an event at (px,py). | |
virtual void | Fatal (const char *method, const char *msgfmt,...) const |
Issue fatal error message. | |
virtual TObject * | FindObject (const char *name) const |
Must be redefined in derived classes. | |
virtual TObject * | FindObject (const TObject *obj) const |
Must be redefined in derived classes. | |
virtual Option_t * | GetDrawOption () const |
Get option used by the graphics system to draw this object. | |
virtual const char * | GetIconName () const |
Returns mime type name of object. | |
virtual const char * | GetName () const |
Returns name of object. | |
virtual char * | GetObjectInfo (Int_t px, Int_t py) const |
Returns string containing info about the object at position (px,py). | |
virtual Option_t * | GetOption () const |
virtual const char * | GetTitle () const |
Returns title of object. | |
virtual UInt_t | GetUniqueID () const |
Return the unique object id. | |
virtual Bool_t | HandleTimer (TTimer *timer) |
Execute action in response of a timer timing out. | |
virtual ULong_t | Hash () const |
Return hash value for this object. | |
Bool_t | HasInconsistentHash () const |
Return true is the type of this object is known to have an inconsistent setup for Hash and RecursiveRemove (i.e. | |
virtual void | Info (const char *method, const char *msgfmt,...) const |
Issue info message. | |
virtual Bool_t | InheritsFrom (const char *classname) const |
Returns kTRUE if object inherits from class "classname". | |
virtual Bool_t | InheritsFrom (const TClass *cl) const |
Returns kTRUE if object inherits from TClass cl. | |
virtual void | Inspect () const |
Dump contents of this object in a graphics canvas. | |
void | InvertBit (UInt_t f) |
virtual Bool_t | IsEqual (const TObject *obj) const |
Default equal comparison (objects are equal if they have the same address in memory). | |
virtual Bool_t | IsFolder () const |
Returns kTRUE in case object contains browsable objects (like containers or lists of other objects). | |
R__ALWAYS_INLINE Bool_t | IsOnHeap () const |
virtual Bool_t | IsSortable () const |
R__ALWAYS_INLINE Bool_t | IsZombie () const |
virtual void | ls (Option_t *option="") const |
The ls function lists the contents of a class on stdout. | |
void | MayNotUse (const char *method) const |
Use this method to signal that a method (defined in a base class) may not be called in a derived class (in principle against good design since a child class should not provide less functionality than its parent, however, sometimes it is necessary). | |
void | Obsolete (const char *method, const char *asOfVers, const char *removedFromVers) const |
Use this method to declare a method obsolete. | |
void | operator delete (void *ptr) |
Operator delete. | |
void | operator delete[] (void *ptr) |
Operator delete []. | |
void * | operator new (size_t sz) |
void * | operator new (size_t sz, void *vp) |
void * | operator new[] (size_t sz) |
void * | operator new[] (size_t sz, void *vp) |
TObject & | operator= (const TObject &rhs) |
TObject assignment operator. | |
virtual void | Paint (Option_t *option="") |
This method must be overridden if a class wants to paint itself. | |
virtual void | Pop () |
Pop on object drawn in a pad to the top of the display list. | |
virtual void | Print (Option_t *option="") const |
This method must be overridden when a class wants to print itself. | |
virtual Int_t | Read (const char *name) |
Read contents of object with specified name from the current directory. | |
virtual void | RecursiveRemove (TObject *obj) |
Recursively remove this object from a list. | |
void | ResetBit (UInt_t f) |
virtual void | SaveAs (const char *filename="", Option_t *option="") const |
Save this object in the file specified by filename. | |
virtual void | SavePrimitive (std::ostream &out, Option_t *option="") |
Save a primitive as a C++ statement(s) on output stream "out". | |
void | SetBit (UInt_t f) |
void | SetBit (UInt_t f, Bool_t set) |
Set or unset the user status bits as specified in f. | |
virtual void | SetDrawOption (Option_t *option="") |
Set drawing option for object. | |
virtual void | SetUniqueID (UInt_t uid) |
Set the unique object id. | |
virtual void | SysError (const char *method, const char *msgfmt,...) const |
Issue system error message. | |
R__ALWAYS_INLINE Bool_t | TestBit (UInt_t f) const |
Int_t | TestBits (UInt_t f) const |
virtual void | UseCurrentStyle () |
Set current style settings in this object This function is called when either TCanvas::UseCurrentStyle or TROOT::ForceStyle have been invoked. | |
virtual void | Warning (const char *method, const char *msgfmt,...) const |
Issue warning message. | |
virtual Int_t | Write (const char *name=0, Int_t option=0, Int_t bufsize=0) |
Write this object to the current directory. | |
virtual Int_t | Write (const char *name=0, Int_t option=0, Int_t bufsize=0) const |
Write this object to the current directory. | |
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TQObject () | |
TQObject Constructor. | |
virtual | ~TQObject () |
TQObject Destructor. | |
Bool_t | AreSignalsBlocked () const |
Bool_t | BlockSignals (Bool_t b) |
virtual void | ChangedBy (const char *method) |
void | CollectClassSignalLists (TList &list, TClass *cls) |
Collect class signal lists from class cls and all its base-classes. | |
Bool_t | Connect (const char *signal, const char *receiver_class, void *receiver, const char *slot) |
Non-static method is used to connect from the signal of this object to the receiver slot. | |
virtual void | Connected (const char *) |
virtual void | Destroyed () |
Bool_t | Disconnect (const char *signal=0, void *receiver=0, const char *slot=0) |
Disconnects signal of this object from slot of receiver. | |
virtual void | Disconnected (const char *) |
void | Emit (const char *signal) |
Activate signal without args. | |
template<typename T > | |
void | Emit (const char *signal, const T &arg) |
Activate signal with single parameter. | |
template<typename... T> | |
void | EmitVA (const char *signal_name, Int_t, const T &... params) |
Emit a signal with a varying number of arguments. | |
TList * | GetListOfClassSignals () const |
Returns pointer to list of signals of this class. | |
TList * | GetListOfConnections () const |
TList * | GetListOfSignals () const |
virtual Bool_t | HasConnection (const char *signal_name) const |
Return true if there is any object connected to this signal. | |
virtual void | HighPriority (const char *signal_name, const char *slot_name=0) |
virtual void | LowPriority (const char *signal_name, const char *slot_name=0) |
virtual void | Message (const char *msg) |
virtual Int_t | NumberOfConnections () const |
Return number of connections for this object. | |
virtual Int_t | NumberOfSignals () const |
Return number of signals for this object. | |
Static Public Member Functions | |
static void | SingleShot (Int_t milliSec, const char *receiver_class, void *receiver, const char *method) |
This static function calls a slot after a given time interval. | |
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static Long_t | GetDtorOnly () |
Return destructor only flag. | |
static Bool_t | GetObjectStat () |
Get status of object stat flag. | |
static void | SetDtorOnly (void *obj) |
Set destructor only flag. | |
static void | SetObjectStat (Bool_t stat) |
Turn on/off tracking of objects in the TObjectTable. | |
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static Bool_t | AreAllSignalsBlocked () |
Returns true if all signals are blocked. | |
static Bool_t | BlockAllSignals (Bool_t b) |
Block or unblock all signals. Returns the previous block status. | |
static Bool_t | Connect (const char *sender_class, const char *signal, const char *receiver_class, void *receiver, const char *slot) |
This method allows to make a connection from any object of the same class to a single slot. | |
static Bool_t | Connect (TQObject *sender, const char *signal, const char *receiver_class, void *receiver, const char *slot) |
Create connection between sender and receiver. | |
static Bool_t | Disconnect (const char *class_name, const char *signal, void *receiver=0, const char *slot=0) |
Disconnects "class signal". | |
static Bool_t | Disconnect (TQObject *sender, const char *signal=0, void *receiver=0, const char *slot=0) |
Disconnects signal in object sender from slot_method in object receiver. | |
Protected Attributes | |
TTime | fAbsTime |
TString | fCommand |
Bool_t | fIntSyscalls |
TObject * | fObject |
Bool_t | fSync |
TTime | fTime |
UInt_t | fTimeID |
Bool_t | fTimeout |
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TList * | fListOfConnections |
list of signals from this object | |
TList * | fListOfSignals |
Bool_t | fSignalsBlocked |
list of connections to this object | |
Private Member Functions | |
TTimer (const TTimer &)=delete | |
TTimer & | operator= (const TTimer &)=delete |
Additional Inherited Members | |
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enum | { kIsOnHeap = 0x01000000 , kNotDeleted = 0x02000000 , kZombie = 0x04000000 , kInconsistent = 0x08000000 , kBitMask = 0x00ffffff } |
enum | { kSingleKey = BIT(0) , kOverwrite = BIT(1) , kWriteDelete = BIT(2) } |
enum | EDeprecatedStatusBits { kObjInCanvas = BIT(3) } |
enum | EStatusBits { kCanDelete = BIT(0) , kMustCleanup = BIT(3) , kIsReferenced = BIT(4) , kHasUUID = BIT(5) , kCannotPick = BIT(6) , kNoContextMenu = BIT(8) , kInvalidObject = BIT(13) } |
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enum | { kOnlyPrepStep = BIT(3) } |
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virtual void | DoError (int level, const char *location, const char *fmt, va_list va) const |
Interface to ErrorHandler (protected). | |
void | MakeZombie () |
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virtual const char * | GetSenderClassName () const |
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static Int_t | CheckConnectArgs (TQObject *sender, TClass *sender_class, const char *signal, TClass *receiver_class, const char *slot) |
Checking of consistency of sender/receiver methods/arguments. | |
static TString | CompressName (const char *method_name) |
Removes "const" words and blanks from full (with prototype) method name and resolve any typedefs in the method signature. | |
static Bool_t | ConnectToClass (const char *sender_class, const char *signal, TClass *receiver_class, void *receiver, const char *slot) |
This method allows to make connection from any object of the same class to the receiver object. | |
static Bool_t | ConnectToClass (TQObject *sender, const char *signal, TClass *receiver_class, void *receiver, const char *slot) |
Create connection between sender and receiver. | |
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static Bool_t | fgAllSignalsBlocked = kFALSE |
flag used for suppression of signals | |
#include <TTimer.h>
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privatedelete |
Create timer that times out in ms milliseconds.
If milliSec is 0 then the timeout will be the minimum timeout (see TSystem::ESysConstants, i.e. 10 ms). If mode == kTRUE then the timer is synchronous else a-synchronous. The default is synchronous. Add a timer to the system eventloop by calling TurnOn(). Set command to be executed from Notify() or set the object whose HandleTimer() method will be called via Notify(), derive from TTimer and override Notify() or connect slots to the signals Timeout(), TurnOn() and TurnOff().
Definition at line 86 of file TTimer.cxx.
Create timer that times out in ms milliseconds.
If mode == kTRUE then the timer is synchronous else a-synchronous. The default is synchronous. Add a timer to the system eventloop by calling TurnOn(). The object's HandleTimer() will be called by Notify().
Definition at line 101 of file TTimer.cxx.
Create timer that times out in ms milliseconds.
If mode == kTRUE then the timer is synchronous else a-synchronous. The default is synchronous. Add a timer to the system eventloop by calling TurnOn(). The interpreter will execute command from Notify().
Definition at line 116 of file TTimer.cxx.
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inlinevirtual |
Implements TSysEvtHandler.
Check if timer timed out.
Definition at line 128 of file TTimer.cxx.
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virtual |
Notify when timer times out.
The timer is always reset. To stop the timer call TurnOff(). Make sure to call Reset() also in derived Notify() so timers will keep working repeatedly.
Implements TSysEvtHandler.
Reimplemented in TProcessEventTimer, TThreadTimer, TGLRedrawTimer, TViewTimer, TShutdownTimer, TReaperTimer, and TIdleTOTimer.
Definition at line 143 of file TTimer.cxx.
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inlinevirtual |
Implements TSysEvtHandler.
void TTimer::Reset | ( | ) |
Reset the timer.
Definition at line 157 of file TTimer.cxx.
void TTimer::SetCommand | ( | const char * | command | ) |
Set the interpreter command to be executed at time out.
Removes the object to be notified (if it was set).
Definition at line 174 of file TTimer.cxx.
When the argument is true the a-synchronous timer (SIGALRM) signal handler is set so that interrupted syscalls will not be restarted by the kernel.
This is typically used in case one wants to put a timeout on an I/O operation. By default interrupted syscalls will be restarted.
Definition at line 197 of file TTimer.cxx.
Set the object to be notified at time out.
Removes the command to be executed (if it was set).
Definition at line 184 of file TTimer.cxx.
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static |
This static function calls a slot after a given time interval.
Created internal timer will be deleted after that.
Definition at line 256 of file TTimer.cxx.
Starts the timer with a milliSec timeout.
If milliSec is 0 then the timeout will be the minimum timeout (see TSystem::ESysConstants, i.e. 10 ms), if milliSec is -1 then the time interval as previously specified (in ctor or SetTime()) will be used. If singleShot is kTRUE, the timer will be activated only once, otherwise it will continue until it is stopped. See also TurnOn(), Stop(), TurnOff().
Definition at line 211 of file TTimer.cxx.
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inlinevirtual |
Reimplemented in TGLRedrawTimer.
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virtual |
Remove timer from system timer list.
This requires that a timer has been placed in the system timer list (using TurnOn()). If a TTimer subclass is placed on another list, override TurnOff() to remove the timer from the correct list.
Definition at line 229 of file TTimer.cxx.
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virtual |
Add the timer to the system timer list.
If a TTimer subclass has to be placed on another list, override TurnOn() to add the timer to the correct list.
Definition at line 241 of file TTimer.cxx.