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CallChain Class Reference
Public Member Functions

CallChain Class Reference
[CallChain class]

Group one or more functions in an instance of a CallChain, then call them in sequence using CallChain::call(). More...

#include <CallChain.h>

Inherits NonCopyable< CallChain >.

Public Member Functions

 CallChain (int size=4)
 Create an empty chain.
pFunctionPointer_t add (Callback< void()> func)
 Add a function at the end of the chain.
template<typename T , typename M >
 MBED_DEPRECATED_SINCE ("mbed-os-5.1","The add function does not support cv-qualifiers. Replaced by ""add(callback(obj, method)).") pFunctionPointer_t add(T *obj
 Add a function at the end of the chain.
template<typename T , typename M >
 MBED_DEPRECATED_SINCE ("mbed-os-5.1","The add_front function does not support cv-qualifiers. Replaced by ""add_front(callback(obj, method)).") pFunctionPointer_t add_front(T *obj
 Add a function at the beginning of the chain.
pFunctionPointer_t get (int i) const
 Get a function object from the chain.
int find (pFunctionPointer_t f) const
 Look for a function object in the call chain.
void clear ()
 Clear the call chain (remove all functions in the chain).
bool remove (pFunctionPointer_t f)
 Remove a function object from the chain.
void call ()
 Call all the functions in the chain in sequence.

Detailed Description

Group one or more functions in an instance of a CallChain, then call them in sequence using CallChain::call().

Used mostly by the interrupt chaining code, but can be used for other purposes.

Note:
Synchronization level: Not protected

Example: 

 #include "mbed.h"

 CallChain chain;

 void first(void) {
     printf("'first' function.\n");
 }

 void second(void) {
     printf("'second' function.\n");
 }

 class Test {
 public:
     void f(void) {
         printf("A::f (class member).\n");
     }
 };

 int main() {
     Test test;

     chain.add(second);
     chain.add_front(first);
     chain.add(&test, &Test::f);
     chain.call();
 }

Definition at line 74 of file CallChain.h.

Constructor & Destructor Documentation

CallChain ( int  size = 4 )

Create an empty chain.

Parameters:
size(optional) Initial size of the chain

Definition at line 20 of file CallChain.cpp.

Member Function Documentation

pFunctionPointer_t add ( Callback< void()>  func )

Add a function at the end of the chain.

Parameters:
funcA pointer to a void function
Returns:
The function object created for 'func'

Definition at line 28 of file CallChain.cpp.

void call (  )

Call all the functions in the chain in sequence.

Definition at line 108 of file CallChain.cpp.

void clear (  )

Clear the call chain (remove all functions in the chain).

Definition at line 86 of file CallChain.cpp.

int find ( pFunctionPointer_t  f ) const

Look for a function object in the call chain.

Parameters:
fthe function object to search
Returns:
The index of the function object if found, -1 otherwise.

Definition at line 73 of file CallChain.cpp.

pFunctionPointer_t get ( int  i ) const

Get a function object from the chain.

Parameters:
ifunction object index
Returns:
The function object at position 'i' in the chain

Definition at line 62 of file CallChain.cpp.

MBED_DEPRECATED_SINCE ( "mbed-os-5.1"  ,
"The add function does not support cv-qualifiers. Replaced by ""add(callback(obj, method))."   
)

Add a function at the end of the chain.

Parameters:
objpointer to the object to call the member function on
methodpointer to the member function to be called
Returns:
The function object created for 'obj' and 'method'
MBED_DEPRECATED_SINCE ( "mbed-os-5.1"  ,
"The add_front function does not support cv-qualifiers. Replaced by ""add_front(callback(obj, method))."   
)

Add a function at the beginning of the chain.

Parameters:
objpointer to the object to call the member function on
methodpointer to the member function to be called
Returns:
The function object created for 'tptr' and 'mptr'
bool remove ( pFunctionPointer_t  f )

Remove a function object from the chain.

  • f the function object to remove
Returns:
true if the function object was found and removed, false otherwise.

Definition at line 96 of file CallChain.cpp.

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