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queue.c: fixed bug where dequeue returns a invalid pointer.

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This commit is contained in:
Henrik Hautakoski 2011-01-27 17:19:33 +01:00
parent 896c356d00
commit 4440831f19
1 changed files with 3 additions and 2 deletions
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5
src/queue.c
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@ -96,7 +96,7 @@ void* queue_dequeue(queue_t q) {
obj = q->tail.n->block[q->tail.i++];
if (q->tail.n == q->head.n && q->tail.i > q->head.i) {
if (q->tail.n == q->head.n && q->tail.i >= q->head.i) {
q->tail.i = q->head.i = 0;
} else if (q->tail.i >= BLOCK_SIZE) {
dealloc_node(&q->tail);
@ -110,7 +110,8 @@ int queue_isempty(queue_t q) {
if (q == NULL)
return -1;
return q->head.n == q->tail.n && q->head.i == q->tail.i;
return q->head.n == q->tail.n
&& q->head.i == 0 && q->tail.i == 0;
}
size_t queue_num_items(queue_t q) {