#include<cyg/kernel/kapi.h>
#include<stdio.h>
#include<stdlib.h>

/************
                 Unable to access the data stored in the message box  */



/* Definition of threads,Mailboxes, etc..*/

cyg_thread threadA,threadB;
cyg_thread_entry_t procedureA, procedureB;
cyg_handle_t handleA, handleB,getmboxA, getmboxB;

char threadstack[2][4096];
cyg_mbox mailA, mailB;

void cyg_user_start(void)
{
  printf("\n This program demonstrates the usage of the Mailbox.");
  
  cyg_mbox_create(&getmboxA,&mailA);
  cyg_mbox_create(&getmboxB,&mailB);

  cyg_thread_create(4,procedureA, (cyg_addrword_t)0,
                      "ThreadMailA", threadstack[0],4096,&handleA,&threadA);
  cyg_thread_create(3,procedureB, (cyg_addrword_t)1,
                      "ThreadMailB", threadstack[1],4096,&handleB,&threadB);

  cyg_thread_resume(handleA);
  cyg_thread_resume(handleB);

}

void procedureA(cyg_addrword_t data)
{
  int message = (int)data;
  void *add,*text="Thank You"; 
  add=NULL;
  
  printf("\nThis Thread %d is waiting for mesage from thread 1",message);
 
  if(add=cyg_mbox_get(getmboxA))
  {
   printf("\n Message received %s from thread 1",(char*)add);
   if(cyg_mbox_put(getmboxB,&text))
    printf("\n Sent Acknowledge message to thread 1");
   else
    printf("\n Failed to post message to thread 1");
  } 
}

void procedureB(cyg_addrword_t data)
{
  int message = (int)data;
  void *textdata ="Hello";
  void *string ;

 printf("\n This Thread %d will send a message to thread 0",message);

 if(cyg_mbox_put(getmboxA, &textdata))
   printf("\n Posted message to thread 0");
 if(string=cyg_mbox_get(getmboxB))
  printf("\n Received message %s from Thread 0",(char*)string);
}