cGate Class Reference
[Simulation core classes]
Represents a module gate. More...
#include <cgate.h>
Public Types | |
| enum | Type |
Public Member Functions | |
| virtual bool | deliver (cMessage *msg, simtime_t at) |
Redefined cObject member functions | |
| virtual const char * | getName () const |
| virtual const char * | getFullName () const |
| virtual void | forEachChild (cVisitor *v) |
| virtual std::string | info () const |
| virtual cObject * | getOwner () const |
Connecting the gate. | |
| cChannel * | connectTo (cGate *gate, cChannel *channel=NULL, bool leaveUninitialized=false) |
| void | disconnect () |
| cChannel * | reconnectWith (cChannel *channel, bool leaveUninitialized=false) |
| _OPPDEPRECATED void | setChannel (cChannel *channel) |
Transmission state. | |
| cChannel * | getTransmissionChannel () const |
| cChannel * | findTransmissionChannel () const |
| cChannel * | getIncomingTransmissionChannel () const |
| cChannel * | findIncomingTransmissionChannel () const |
Gate connectivity. | |
| cGate * | getPreviousGate () const |
| cGate * | getNextGate () const |
| cGate * | getPathStartGate () const |
| cGate * | getPathEndGate () const |
| bool | pathContains (cModule *module, int gateId=-1) |
| bool | isConnectedOutside () const |
| bool | isConnectedInside () const |
| bool | isConnected () const |
| bool | isPathOK () const |
Display string. | |
| cDisplayString & | getDisplayString () |
| void | setDisplayString (const char *dispstr) |
Friends | |
| class | cModule |
Information about the gate. | |
|
| |
| const char * | getBaseName () const |
| const char * | getNameSuffix () const |
| cProperties * | getProperties () const |
| Type | getType () const |
| cModule * | getOwnerModule () const |
| int | getId () const |
| bool | isVector () const |
| int | getBaseId () const |
| int | getIndex () const |
| int | getVectorSize () const |
| int | size () const |
| cChannel * | getChannel () const |
| void | setDeliverOnReceptionStart (bool d) |
| bool | getDeliverOnReceptionStart () const |
| static const char * | getTypeName (Type t) |
Detailed Description
Represents a module gate.
cGate object are created and managed by modules; the user typically does not want to directly create or destroy cGate objects. However, they are important if a simple module algorithm needs to know about its surroundings.
Member Function Documentation
| cChannel* cGate::connectTo | ( | cGate * | gate, | |
| cChannel * | channel = NULL, |
|||
| bool | leaveUninitialized = false | |||
| ) |
Connects the gate to another gate, using the given channel object (if one is specified).
This method can be used to manually create connections for dynamically created modules.
This method invokes callInitialize() on the channel object, unless the compound module containing this connection is not yet initialized (then it assumes that this channel will be initialized as part of the compound module initialization process.) To leave the channel uninitialized, specify true for the leaveUninitialized parameter.
If the gate is already connected, an error will occur. The gate argument cannot be NULL, that is, you cannot use this function to disconnect a gate; use disconnect() for that.
Note: When you set channel parameters after channel initialization, make sure the channel class is implemented so that the changes take effect; i.e. the channel should either override and properly handle handleParameterChange(), or should not cache any values from parameters.
| virtual bool cGate::deliver | ( | cMessage * | msg, | |
| simtime_t | at | |||
| ) | [virtual] |
This function is called internally by the send() functions and channel classes' deliver() to deliver the message to its destination.
A false return value means that the message object should be deleted by the caller. (This is used e.g. with parallel simulation, for messages leaving the partition.)
| void cGate::disconnect | ( | ) |
Disconnects the gate, and also deletes the associated channel object if one has been set.
disconnect() must be invoked on the source gate ("from" side) of the connection.
The method has no effect if the gate is not connected.
| virtual void cGate::forEachChild | ( | cVisitor * | v | ) | [virtual] |
| int cGate::getBaseId | ( | ) | const |
If the gate is part of a gate vector, returns the ID of the first element in the gate vector.
Otherwise, it returns the gate's ID.
| cChannel* cGate::getChannel | ( | ) | const [inline] |
Returns the channel object attached to this gate, or NULL if there is no channel.
This is the channel between this gate and this->getNextGate(), that is, channels are stored on the "from" side of the connections.
| bool cGate::getDeliverOnReceptionStart | ( | ) | const [inline] |
Returns whether messages delivered through this gate will mark the start or the end of the reception process (assuming nonzero message length and data rate on the channel.
)
- See also:
- setDeliverOnReceptionStart()
| cDisplayString& cGate::getDisplayString | ( | ) |
Returns the display string for the gate, which controls the appearance of the connection arrow starting from gate.
The display string is stored in the channel associated with the connection. If there is no channel, this call creates an installs a cIdealChannel to hold the display string.
| virtual const char* cGate::getFullName | ( | ) | const [virtual] |
| int cGate::getId | ( | ) | const |
Returns the gate ID, which uniquely identifies the gate within the module.
IDs are guaranteed to be contiguous within a gate vector: module->gate(id+index) == module->gate(id)+index.
Gate IDs are stable: they are guaranteed not to change during simulation. (This is a new feature of OMNeT++ 4.0. In earlier releases, gate IDs could change when the containing gate vector was resized.)
Note: As of OMNeT++ 4.0, gate IDs are no longer small integers, and cannot be used for iterating over the gates of a module. Use cModule::GateIterator for iteration.
| cChannel* cGate::getIncomingTransmissionChannel | ( | ) | const |
Typically invoked on an input gate, this method searches the reverse path (i.e.
calls getPreviousGate() repeatedly) for the transmission channel. It is guaranteed that there can be at most one such channel per path. If no transmission channel is found, the method throws an error.
| int cGate::getIndex | ( | ) | const [inline] |
If the gate is part of a gate vector, returns the gate's index in the vector.
Otherwise, it returns 0.
| cGate* cGate::getNextGate | ( | ) | const [inline] |
Returns the next gate in the series of connections (the path) that contains this gate, or a NULL pointer if this gate is the last one in the path.
(E.g. for a simple module input gate, this function will return NULL.)
| cGate* cGate::getPreviousGate | ( | ) | const [inline] |
Returns the previous gate in the series of connections (the path) that contains this gate, or a NULL pointer if this gate is the first one in the path.
(E.g. for a simple module output gate, this function will return NULL.)
| cProperties* cGate::getProperties | ( | ) | const |
Returns the properties for this gate.
Properties cannot be changed at runtime.
| cChannel* cGate::getTransmissionChannel | ( | ) | const |
Typically invoked on an output gate, this method returns the channel in the connection path that supports datarate (as determined by cChannel::isTransmissionChannel(); it is guaranteed that there can be at most one such channel per path).
If there is no such channel, an error is thrown.
This method only checks the segment of the connection path that starts at this gate, so, for example, it is an error to invoke it on a simple module input gate.
Note: this method searches the connection path linearly, so at performance-critical places it may be better to cache its return value (provided that connections are not removed or created dynamically during simulation.)
- See also:
- cChannel::isTransmissionChannel()
| Type cGate::getType | ( | ) | const [inline] |
Returns the gate's type, cGate::INPUT or cGate::OUTPUT.
(It never returns cGate::INOUT, because a cGate object is always either the input or the output half of an inout gate ("name$i" or "name$o").
| int cGate::getVectorSize | ( | ) | const [inline] |
If the gate is part of a gate vector, returns the size of the vector.
For non-vector gates it returns 1.
The gate vector size can also be obtained by calling the cModule::gateSize().
| virtual std::string cGate::info | ( | ) | const [virtual] |
| bool cGate::isConnected | ( | ) | const |
Returns true if the gate fully connected.
For a compound module gate this means both isConnectedInside() and isConnectedOutside() are true; for a simple module, only isConnectedOutside() is checked.
| bool cGate::isConnectedInside | ( | ) | const |
Returns true if the gate (of a compound module) is connected inside (i.e.
to one of its submodules).
This means that for an input gate, getNextGate() must be non-NULL; for an output gate, getPreviousGate() must be non-NULL.
| bool cGate::isConnectedOutside | ( | ) | const |
Returns true if the gate is connected outside (i.e.
to one of its sibling modules or to the parent module).
This means that for an input gate, getPreviousGate() must be non-NULL; for an output gate, getNextGate() must be non-NULL.
Disconnects the gate, then connects it again to the same gate, with the given channel object (if not NULL).
The gate must be connected.
- See also:
- connectTo()
| void cGate::setDeliverOnReceptionStart | ( | bool | d | ) |
This method may only be invoked on input gates of simple modules.
Messages with nonzero length then have a nonzero transmission duration (and thus, reception duration on the other side of the connection). By default, the delivery of the message to the module marks the end of the reception. Setting this bit will cause the channel to deliver the message to the module at the start of the reception. The duration that the reception will take can be extracted from the message object, by its getDuration() method.
The documentation for this class was generated from the following file:
