Similar Nginx compile-time generated function chain list

The following code may require a certain C + + base.

Need some knowledge of function pointers

Depth profiling function pointer click here

Common.h

#pragma oncetypedef int (*pt) (void); void init_2 ();

2.cpp

#include
 
  #include "Common.h" using namespace std;static pt Next_pt;extern pt Top_pt;int filter_2 () {cout<< ' filter_2 ' <
  
   1.cpp
   
 #include 
     
       #include "common.h" using namespace std;static pt next_pt;pt top_pt;static int fil Ter_1 () {cout<< "filter_1" < 
      
        compile command 
       
 g++ 1.cpp 2.cpp-g-o0 
 
       
 Execute 
 
       
./a.out 
 
       
 Filter_2 
 filter_1 
 If you've programmed and executed successfully
   , please continue looking down. 
   
       
 Top_pt is a global variable 
   
       
 Next_pt is a local global variable 
   
       
 If you want to know 
 The 
       
 Top_pt will change every time the code executes, pointing to the new list header, and a linked list is generated by the continuous execution of the init_* function. It looks like a single list with global variables. 
 
       
 Well, it's the trick, too! 
 
 
       
 Above introduces similar Nginx compile-time generated function chain list, including the contents of the content, I hope that the ph P Tutorials Interested friends are helpful. 
 
       
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