author | Mathieu Lacage <mathieu.lacage@sophia.inria.fr> |
Wed, 29 Aug 2007 14:43:31 +0200 | |
changeset 1391 | ce9ab2cbf936 |
parent 286 | 57e6a2006962 |
child 6295 | 347c3b3a1394 |
permissions | -rw-r--r-- |
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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
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#include "ns3/callback.h" |
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#include "ns3/assert.h" |
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#include <iostream> |
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using namespace ns3; |
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static double |
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CbOne (double a, double b) |
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{ |
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std::cout << "invoke cbOne a=" << a << ", b=" << b << std::endl; |
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return a; |
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} |
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class MyCb { |
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public: |
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int CbTwo (double a) { |
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std::cout << "invoke cbTwo a=" << a << std::endl; |
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return -5; |
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} |
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}; |
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int main (int argc, char *argv[]) |
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{ |
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// return type: double |
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// first arg type: double |
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// second arg type: double |
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Callback<double, double, double> one; |
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// build callback instance which points to cbOne function |
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one = MakeCallback (&CbOne); |
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// this is not a null callback |
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NS_ASSERT (!one.IsNull ()); |
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// invoke cbOne function through callback instance |
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double retOne; |
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retOne = one (10.0, 20.0); |
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// return type: int |
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// first arg type: double |
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Callback<int, double> two; |
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MyCb cb; |
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// build callback instance which points to MyCb::cbTwo |
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two = MakeCallback (&MyCb::CbTwo, &cb); |
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// this is not a null callback |
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NS_ASSERT (!two.IsNull ()); |
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// invoke MyCb::cbTwo through callback instance |
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int retTwo; |
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retTwo = two (10.0); |
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two = MakeNullCallback<int, double> (); |
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// invoking a null callback is just like |
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// invoking a null function pointer: |
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// it will crash. |
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//int retTwoNull = two (20.0); |
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NS_ASSERT (two.IsNull ()); |
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return 0; |
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} |