80. Shared Memory for process communication

• Server creates shared memory

  1#include <stdio.h>2#include <stdlib.h>3#include <Windows.h>4 5 #defineSIZE 40966 //The pointer identifies the first address7LPVOID lpdata =NULL;8 9 Ten voidMain () One { A     if(lpdata!=NULL) -     { -Puts"Shared memory exists"); the     } -     //Create shared Memory -HANDLE Hmap =Createfilemappinga (Invalid_handle_value, NULL, -Page_readwrite | Sec_commit,0, SIZE,"Cgwmem"); +  -     if(hmap==NULL) +     { APuts"creation failed"); at     } -     Else -     { -         //mapping files to pointers -lpdata = MapViewOfFile (Hmap, File_map_read | File_map_write,0,0,0); -  in         inta[Ten] = {1,2,3,4,5,6,7,8,9,0 }; -memcpy (Lpdata, A, +); to     } +  -System"Pause"); the  *  $UnmapViewOfFile (lpdata);//liftedPanax Notoginseng CloseHandle (hmap); -System"Pause"); the  +  A}

• The server uses this piece of shared memory

  1#include <stdio.h>2#include <stdlib.h>3#include <Windows.h>4 5 voidMain ()6 {7HANDLE hmapfile = Openfilemappinga (File_map_read, FALSE,"Cgwgmem");8     if(Hmapfile = =NULL)9     {Tenprintf"failed to open up"); One     } A  -     //Create pointers, point to this piece of memory -LPVOID lpbase = MapViewOfFile (Hmapfile, File_map_read,0,0,0); the     if(Lpbase = =NULL) -     { -printf"Open Failed"); -  +     } -  +     int*p =lpbase; A      for(inti =0; I <Ten; i++) at     { -printf"%d\n", P[i]); -     } -  -  -UnmapViewOfFile (lpbase);//lifted in CloseHandle (hmapfile); -  to  +System"Pause"); -}

80. Shared Memory for process communication