adt: methods to check the capacity and current size of the byte buffe…

…r pool

include/srsran/adt/byte_buffer.h

@@ -29,6 +29,13 @@ size_t byte_buffer_segment_pool_default_segment_size();
 void init_byte_buffer_segment_pool(std::size_t nof_segments,
                                    std::size_t memory_block_size = byte_buffer_segment_pool_default_segment_size());
 
+/// \brief Get total capacity of the byte buffer segment pool in terms of segments.
+size_t get_byte_buffer_segment_pool_capacity();
+
+/// \brief Get an estimate of the number of segments of the byte buffer segment pool that are currently available for
+/// allocation in the caller thread.
+size_t get_byte_buffer_segment_pool_current_size_approx();
+
 /// \brief Non-owning view to a byte sequence.
 ///
 /// The underlying byte sequence is not contiguous in memory. Instead, it is represented as an intrusive linked list of

lib/support/byte_buffer.cpp

@@ -41,6 +41,18 @@ void srsran::init_byte_buffer_segment_pool(std::size_t nof_segments, std::size_t
   report_fatal_error_if_not(memory_block_size > 64U, "memory blocks must be larger than the segment control header");
 }
 
+size_t srsran::get_byte_buffer_segment_pool_capacity()
+{
+  auto& pool = detail::byte_buffer_segment_pool::get_instance();
+  return pool.nof_memory_blocks();
+}
+
+size_t srsran::get_byte_buffer_segment_pool_current_size_approx()
+{
+  auto& pool = detail::byte_buffer_segment_pool::get_instance();
+  return pool.get_central_cache_approx_size() + pool.get_local_cache_size();
+}
+
 // ------- byte_buffer class -------
 
 void byte_buffer::control_block::destroy_node(node_t* node) const