#if !defined(MYTHREADS_H_H)
#define MYTHREADS_H_H
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <thread.h>
#include <unistd.h>
#include <synch.h>
#include <sys/stat.h>
#include <fcntl.h>

#include "type-def.h"
#include "util.h"

#if defined(MYTHREADS_SOURCE_C_C)
#define EXTERN_FLAG
#else
#define EXTERN_FLAG extern
#endif

// The following are the global variables used among
// producer and consumer threads
// Note they are initilized in the main program

EXTERN_FLAG MESSAGE_INFO *shared_buf;
EXTERN_FLAG int message_buf_size;

EXTERN_FLAG char *mailbox;
EXTERN_FLAG int   mailbox_len;
EXTERN_FLAG int  nextc, nextp;
EXTERN_FLAG int done;
EXTERN_FLAG int mutex_lock_flag;

EXTERN_FLAG int NUM_THREADS;

// The following are the function prototype
EXTERN_FLAG void * Producer(void *arg);
EXTERN_FLAG void *Consumer(void *arg);
EXTERN_FLAG int  Produce_A_Message(MESSAGE_INFO *amessage);
EXTERN_FLAG int Consume_A_Message(MESSAGE_INFO *amessage);
#undef EXTERN_FLAG
#endif