294 // In particular, the individual queues allocate buffers from this shared

   294 // In particular, the individual queues allocate buffers from this shared

   295 // set, and return completed buffers to the set.

   295 // set, and return completed buffers to the set.

   296 class PtrQueueSet {

   296 class PtrQueueSet {

   297   BufferNode::Allocator* _allocator;

   297   BufferNode::Allocator* _allocator;

   298 

   298 

   299 protected:

   303 protected:

   300   bool _all_active;

   304   bool _all_active;

   301 

   305 

   302   // Create an empty ptr queue set.

   306   // Create an empty ptr queue set.

   303   PtrQueueSet();

   307   PtrQueueSet();

   307   // arguments.

   311   // arguments.

   308   void initialize(BufferNode::Allocator* allocator);

   312   void initialize(BufferNode::Allocator* allocator);

   309 

   313 

   310 public:

   314 public:

   311 

   315 

   312   // Return the buffer for a BufferNode of size buffer_size().

   319   // Return the buffer for a BufferNode of size buffer_size().

   313   void** allocate_buffer();

   320   void** allocate_buffer();

   314 

   321 

   315   // Return an empty buffer to the free list.  The node is required

   322   // Return an empty buffer to the free list.  The node is required

   316   // to have been allocated with a size of buffer_size().

   323   // to have been allocated with a size of buffer_size().