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Add comment from #629 in ring_buffer.c. #716

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merged 1 commit into from
Jan 21, 2018
Merged

Add comment from #629 in ring_buffer.c. #716

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11 changes: 11 additions & 0 deletions toxav/ring_buffer.c
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Original file line number Diff line number Diff line change
Expand Up @@ -34,10 +34,16 @@ bool rb_full(const RingBuffer *b)
{
return (b->end + 1) % b->size == b->start;
}

bool rb_empty(const RingBuffer *b)
{
return b->end == b->start;
}

/*
* returns: NULL on success
* input value "p" on FAILURE -> caller can free on failed rb_write
*/
void *rb_write(RingBuffer *b, void *p)
{
void *rc = NULL;
Expand All @@ -55,6 +61,7 @@ void *rb_write(RingBuffer *b, void *p)

return rc;
}

bool rb_read(RingBuffer *b, void **p)
{
if (b->end == b->start) { /* Empty */
Expand All @@ -66,6 +73,7 @@ bool rb_read(RingBuffer *b, void **p)
b->start = (b->start + 1) % b->size;
return true;
}

RingBuffer *rb_new(int size)
{
RingBuffer *buf = (RingBuffer *)calloc(sizeof(RingBuffer), 1);
Expand All @@ -83,13 +91,15 @@ RingBuffer *rb_new(int size)

return buf;
}

void rb_kill(RingBuffer *b)
{
if (b) {
free(b->data);
free(b);
}
}

uint16_t rb_size(const RingBuffer *b)
{
if (rb_empty(b)) {
Expand All @@ -101,6 +111,7 @@ uint16_t rb_size(const RingBuffer *b)
b->end - b->start :
(b->size - b->start) + b->end;
}

uint16_t rb_data(const RingBuffer *b, void **dest)
{
uint16_t i = 0;
Expand Down