Simulation implementation of memory management _c language in C language

This simulates memory management in C, when we want to create or use an object, then the object will call the Retain method, Count +1, when we want to release the object, we will call free, note here to judge the counting memory, if it is 0, then destroy.

#import <Foundation/Foundation.h> 
int cnt = 0; 
 
void Fun (Charchar * p) 
{ 
  printf ("%c\n", P[0]); 
 
Charchar * RETAIN1 (Charchar * p) 
{ 
  //retain (p); 
  CNT + +; 
  return p; 
} 
 
void Dealloc1 (Charchar *p) 
{free 
  (p); 
} 
 
void Release (Charchar * p) 
{ 
  cnt--; 
  if (cnt = = 0) { 
    //free (p); 
    Dealloc1 (P); 
  } 
 
int main (int argc, const CHARCHAR * argv[]) 
{ 
 
  @autoreleasepool { 
    Charchar * p = (Charchar *) malloc (1000); 
  p[0] = ' a '; 
    P[1] = ' B '; 
    Charchar * q = p; 
    Early release of 
    //free (p); 
    printf ("%c\n", P[0]); 
    Free (q); 
    Free (q); 
     
  } 
  return 0; 
}

The above is the simulation C language memory management of the implementation code, I hope to help you learn.