Function esp_idf_hal::sys::xRingbufferGetCurFreeSize

pub unsafe extern "C" fn xRingbufferGetCurFreeSize(
    xRingbuffer: *mut c_void,
) -> usize

@brief Get current free size available for an item/data in the buffer

This gives the real time free space available for an item/data in the ring buffer. This represents the maximum size an item/data can have if it was currently sent to the ring buffer.

@warning This API is not thread safe. So, if multiple threads are accessing the same ring buffer, it is the application’s responsibility to ensure atomic access to this API and the subsequent Send

@note An empty no-split buffer has a max current free size for an item that is limited to ((buffer_size/2)-header_size). See API reference for xRingbufferGetMaxItemSize().

@param[in] xRingbuffer Ring buffer to query

@return Current free size, in bytes, available for an entry