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#include<stdio.h>
#include<pthread.h>
#include<unistd.h>
#include<stdlib.h>
#include<string.h>
int in=0;
int out=0;
int shared_counter=0;
char* buffer[10];
pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; // mutual exclusion lock
void putonbuf()
{
char file[10]={0};
int i=0;
char str[30]={0};
int j=0;
FILE *fptr;
gets(file);
fptr = fopen(file,"r");
while(1)
{
while(shared_counter==10);
str[i]=fgetc(fptr);
if(str[i]==EOF)
break;
if(str[i]=='\n')
{
pthread_mutex_lock(&mutex);
printf("putting\n");
str[i]='\0';
buffer[j]=malloc(strlen(str)+1);
strcpy(buffer[j],str);
j++;
i=-1;
char str[30]={0};
shared_counter++;
pthread_mutex_unlock(&mutex);
}
i++;
}
fclose(fptr);
}
void getoffbuf(){
char* data;
int a=0;
pthread_mutex_lock(&mutex);
printf("consumer is removing\n");
data=buffer[out];
data=(char*)StrReverse(data);
puts(data);
out=(out+1)%10;
shared_counter--;
pthread_mutex_unlock(&mutex); // unlock queue
}
void* producer()
{
putonbuf();
}
void* consumer()
{
while(1)
{
while (shared_counter == 0);
getoffbuf();
}
}
char* StrReverse(char* str)
{
char *temp, *ptr;
int len, i;
temp=str;
for(len=0; *temp !='\0';temp++, len++);
ptr=malloc(sizeof(char)*(len+1));
for(i=len-1; i>=0; i--)
ptr[len-i-1]=str[i];
ptr[len]='\0';
return ptr;
}
int main()
{
pthread_t tid1,tid2;
if(pthread_create(&tid1,NULL,producer,NULL)){
fprintf(stderr, "thread creation failed.");
exit(1);
}
if(pthread_create(&tid2,NULL,consumer,NULL)){
fprintf(stderr, "thread creation failed.");
exit(1);
}
pthread_join(tid1, NULL);
pthread_cancel(tid2);
return 0;
}
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