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#include <config.h>
#ifndef __RTVIDEOREC_QUEUE_H
#define __RTVIDEOREC_QUEUE_H
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <avformat.h>
#include <avcodec.h>
#include "util.h"
typedef struct __buf_t {
struct __buf_t *next;
struct __buf_t *prev;
void *data;
} buf_t;
template<typename T>
class Queue {
public:
Queue(int glimit = 0);
~Queue();
void push(T *t);
T *pop();
private:
int limit;
buf_t *head;
buf_t *tail;
int count;
pthread_mutex_t mutex;
};
template<typename T>
Queue<T>::Queue(int glimit)
{
limit = glimit;
count = 0;
head = NULL;
tail = NULL;
}
template<typename T>
Queue<T>::~Queue()
{
if(count != 0) {
fprintf(stderr, "Queue not empty (%d)\n", count);
while(T *t = pop()) delete t;
}
}
template<typename T>
void Queue<T>::push(T *t)
{
buf_t *b = (buf_t*)xmalloc(sizeof(*b));
b->data = (void*)t;
assert(b != NULL);
if(limit && count > 0) {
T* tmp = (T*)pop();
delete tmp;
}
if(!head) {
head = tail = b;
b->next = b->prev = NULL;
count = 1;
return;
}
b->next = tail;
b->prev = NULL;
if(tail)
tail->prev = b;
tail = b;
count++;
}
template<typename T>
T *Queue<T>::pop()
{
T *d;
buf_t *b;
assert(count >= 0);
if(count == 0)
return NULL;
b = head;
if(b->prev)
b->prev->next = NULL;
head = b->prev;
if(b == tail)
tail = NULL;
count--;
d = (T*)b->data;
free(b);
return d;
}
#endif
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