49 lines
1.0 KiB
C
49 lines
1.0 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <stdbool.h>
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// Type for queue, change to the desired type to be used in the queue
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#define QUEUE_TYPE int
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typedef struct queue {
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size_t length;
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QUEUE_TYPE* arr;
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size_t start;
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size_t size;
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} queue_t;
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queue_t queue_init(size_t length) {
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queue_t self;
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self.length = length;
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self.arr = malloc(length * sizeof(QUEUE_TYPE))
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self.start = 0;
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self.size = 0;
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return self;
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}
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bool enqueue(queue_t* self, QUEUE_TYPE element) {
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if (self->size == self->length) {
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return false;
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}
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self->arr[self->start + self->size] = element;
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self->size++;
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return true;
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}
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bool dequeue(queue_t* self, QUEUE_TYPE* destination) {
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if (self->size == 0) {
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return false;
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}
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*destination = self->arr[self->start];
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self->start = (self->start + 1) % self->length;
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self->size--;
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return true;
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}
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void queue_destroy(queue_t* self) {
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if (self->arr != NULL) {
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free(self->arr);
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self->arr = NULL;
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}
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}
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