diff options
Diffstat (limited to 'src/util/CircularBuffer.hxx')
| -rw-r--r-- | src/util/CircularBuffer.hxx | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/util/CircularBuffer.hxx b/src/util/CircularBuffer.hxx index 0321b91f6..da6f412a5 100644 --- a/src/util/CircularBuffer.hxx +++ b/src/util/CircularBuffer.hxx @@ -108,6 +108,18 @@ public: } /** + * Returns the number of elements that can be added to this + * buffer. + */ + constexpr size_type GetSpace() const { + /* space = capacity - size - 1 */ + return (head <= tail + ? capacity - tail + head + : head - tail) + - 1; + } + + /** * Prepares writing. Returns a buffer range which may be written. * When you are finished, call Append(). */ |