c3e08c8fea
Until now it has been necessary to separately define a k_fifo and an array of buffers when creating net_buf pools. This has been a bit of an inconvenience as well as blurred the line of what exactly constitutes the "pool". This patch removes the NET_BUF_POOL() macro and replaces it with a NET_BUF_POOL_DEFINE() macro that internally expands into the buffer array and new net_buf_pool struct with a given name: NET_BUF_POOL_DEFINE(pool_name, ...); Having a dedicated context struct for the pool has the added benefit that we can start moving there net_buf members that have the same value for all buffers from the same pool. The first such member that gets moved is the destroy callback, thus shrinking net_buf by four bytes. Another potential candidate is the user_data_size, however right not that's left out since it would just leave 2 bytes of padding in net_buf (i.e. not influence its size). Another common value is buf->size, however that one is also used by net_buf_simple and can therefore not be moved. This patch also splits getting buffers from a FIFO and allocating a new buffer from a pool into two separate APIs: net_buf_get and net_buf_alloc, thus simplifying the APIs and their usage. There is no separate 'reserve_head' parameter anymore when allocating, rather the user is expected to call net_buf_reserve() afterwards if something else than 0 headroom is desired. Change-Id: Id91b1e5c2be2deb1274dde47f5edebfe29af383a Signed-off-by: Johan Hedberg <johan.hedberg@intel.com> |
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