Add comment explaining NULL case in circular_buffer::enqueue and add logging to ::dequeue.
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1 changed files with 7 additions and 1 deletions
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@ -91,7 +91,8 @@ circular_buffer::enqueue(void *src) {
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/**
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* Copies data from this buffer to the "dst" address. The buffer is
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* shrunk if possible.
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* shrunk if possible. If the "dst" address is NULL, then the message
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* is dequeued but is not copied.
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*/
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void
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circular_buffer::dequeue(void *dst) {
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@ -100,6 +101,11 @@ circular_buffer::dequeue(void *dst) {
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I(dom, _unread <= _buffer_sz);
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I(dom, _buffer);
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dom->log(rust_log::MEM | rust_log::COMM,
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"circular_buffer dequeue "
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"unread: %d, buffer_sz: %d, unit_sz: %d",
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_unread, _buffer_sz, unit_sz);
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if (dst != NULL) {
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memcpy(dst, &_buffer[_next], unit_sz);
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}
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