QUEUE.H

#ifndef __QUEUE_H__ 
#define __QUEUE_H__ 
typedef struct qnode_st { 
struct qnode_st*next; 
struct qnode_st*prev; 
void *ptr; 
intqnodeid;/* do not change*/ 
} qnode; 
 
typedef struct queue_st { 
qnode*head; 
qnode*tail; 
} queue; 
 
qnode *addtoq(queue *q, void *p); 
void *removeheadfromq(queue *q); 
void *removeqnodefromq(queue *q, qnode *t); 
queue *newq(void); 
#endif /* __QUEUE_H__ */