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# include <stdio.h>
# include <pthread.h>
# define BufferSize 10
 
void *Producer();
void *Consumer();
 
int BufferIndex=0;
char *BUFFER;
 
pthread_cond_t Buffer_Not_Full=PTHREAD_COND_INITIALIZER;
pthread_cond_t Buffer_Not_Empty=PTHREAD_COND_INITIALIZER;
pthread_mutex_t mVar=PTHREAD_MUTEX_INITIALIZER;
 
int main()
{    
    pthread_t ptid,ctid;
 
    BUFFER=(char *) malloc(sizeof(char) * BufferSize);            
 
    pthread_create(&ptid,NULL,Producer,NULL);
    pthread_create(&ctid,NULL,Consumer,NULL);
 
    pthread_join(ptid,NULL);
    pthread_join(ctid,NULL);
 
 
    return 0;
}
 
void *Producer()
{    
    for(;;)
    {
        pthread_mutex_lock(&mVar);
        if(BufferIndex==BufferSize)
        {                        
            pthread_cond_wait(&Buffer_Not_Full,&mVar);
        }                        
        BUFFER[BufferIndex++]='@';
        printf("Produce : %d \n",BufferIndex);
        pthread_mutex_unlock(&mVar);
        pthread_cond_signal(&Buffer_Not_Empty);        
    }    
 
}
 
void *Consumer()
{
    for(;;)
    {
        pthread_mutex_lock(&mVar);
        if(BufferIndex==-1)
        {            
            pthread_cond_wait(&Buffer_Not_Empty,&mVar);
        }                
        printf("Consume : %d \n",BufferIndex--);        
        pthread_mutex_unlock(&mVar);        
        pthread_cond_signal(&Buffer_Not_Full);                
    }    
}

prog.cpp: In function 'int main()':
prog.cpp:19:53: error: 'malloc' was not declared in this scope
     BUFFER=(char *) malloc(sizeof(char) * BufferSize);            
                                                     ^
prog.cpp:21:44: error: invalid conversion from 'void* (*)()' to 'void* (*)(void*)' [-fpermissive]
     pthread_create(&ptid,NULL,Producer,NULL);
                                            ^
In file included from prog.cpp:2:0:
/usr/include/pthread.h:244:12: note: initializing argument 3 of 'int pthread_create(pthread_t*, const pthread_attr_t*, void* (*)(void*), void*)'
 extern int pthread_create (pthread_t *__restrict __newthread,
            ^
prog.cpp:22:44: error: invalid conversion from 'void* (*)()' to 'void* (*)(void*)' [-fpermissive]
     pthread_create(&ctid,NULL,Consumer,NULL);
                                            ^
In file included from prog.cpp:2:0:
/usr/include/pthread.h:244:12: note: initializing argument 3 of 'int pthread_create(pthread_t*, const pthread_attr_t*, void* (*)(void*), void*)'
 extern int pthread_create (pthread_t *__restrict __newthread,
            ^

Standard output is empty