Thread: Circular character buffer with pthreads/mutex/cond deadlock help!

I am implementing a circular character buffer for an assignment, the requirements are pretty strict so I can't change the logic from what it is now too much. Unfortunately, this code deadlocks right out of the gate. I'm new to pthreads and concurrent programming in general so I could use some help spotting the error here.

Code:

#include <pthread.h>
#include <stdio.h>

#define QSIZE 10

pthread_cond_t full,/* count == QSIZE */ 
	       empty;/* count == 0 */ 
pthread_mutex_t m; /* implements critical section */ 
unsigned int iBuf, /* tail of circular queue */ 
	     oBuf; /* head of circular queue */ 
int count; /* count characters */ 
char buf [QSIZE]; /* the circular queue */ 

void Put(char s[]) {/* add "ch"; wait if full */
	int size = sizeof(s)/sizeof(char);
	printf("size: %d", size); //doesn't print
	pthread_mutex_lock(&m); 
	int i;
	for(i = 0; i < size; i++) {
		while (count >= QSIZE) 
			pthread_cond_wait(&full, &m);/* is there empty slot? */ 
	
		buf[iBuf] = s[i]; /* store the character */ 
		iBuf = (iBuf+1) % QSIZE; /* increment mod QSIZE */ 
		count++; 
		if (count == 1) 
			pthread_cond_signal(&empty);/* new character available */ 
	}
	pthread_mutex_unlock(&m); 
} 
char Get() {/* remove "ch" from queue; wait if empty */ 
	char ch; 

	pthread_mutex_lock(&m); 
	while (count <= 0) 
		pthread_cond_wait(&empty, &m);/* is a character present? */ 

	ch = buf[oBuf]; /* retrieve from the head of the queue */ 
	oBuf = (oBuf+1) % QSIZE; 
	count--; 
	if (count == QSIZE-1) 
		pthread_cond_signal(&full);/* signal existence of a slot */ 
	
	pthread_mutex_unlock(&m); 
	return ch; 
} 

void * p1(void *arg) {
	int i;
	for (i = 0; i < 5; i++) {
		Put("hella"); 
	}
}

void * p2(void *arg) {
	int i;
	for (i = 0; i < 5; i++) {
		Put("goodby"); 
	}
}

int main() { 
	pthread_t t1, t2;
	void *r1, *r2;
	oBuf = 0; iBuf = 0; count=0; /* all slots are empty */ 

	pthread_cond_init(&full, NULL); 
	pthread_cond_init(&empty, NULL); 
	pthread_mutex_init(&m, NULL); 
	
	pthread_create(&t1, NULL, p1, &r1);
	pthread_create(&t2, NULL, p2, &r2);
	
	printf("Main"); //doesn't print
	char c;
	int i = 0;
	while (i < 55) {
		c = Get();
		printf("%c",c);
		i++;
	}

	pthread_join(t1, &r1);
	pthread_join(t2, &r2);
	return 0; 
}

EDIT: I think i need to modify the reentry queue somehow, but I know nothing of how to do it.