(see task #6831): Included new option PBUF_POOL_USES_MEMP to use a memp pool for PBUF_POOL pbufs instead of the old pool implementation in pbuf.c to remove redundant code.

src/include/lwip/memp.h

@@ -53,9 +53,12 @@ typedef enum {
   MEMP_TCPIP_MSG,
 #if ARP_QUEUEING
   MEMP_ARP_QUEUE,
+#endif
+#if PBUF_POOL_USES_MEMP
+  MEMP_PBUF_POOL,
 #endif
   MEMP_SYS_TIMEOUT,
-  
+
   MEMP_MAX
 } memp_t;
 

src/include/lwip/opt.h

@@ -377,21 +377,25 @@ a lot of data that needs to be copied, this should be set high. */
 
 
 /* ---------- Pbuf options ---------- */
-/* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */
+/* PBUF_POOL_USES_MEMP: if set to 1, PBUF_POOL pbufs are allocated using an
+   additional memp type, which saves some code since a dedicated pbuf pool
+   is not used any more */
+#ifndef PBUF_POOL_USES_MEMP
+#define PBUF_POOL_USES_MEMP             0
+#endif
 
+/* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */
 #ifndef PBUF_POOL_SIZE
 #define PBUF_POOL_SIZE                  16
 #endif
 
 /* PBUF_LINK_HLEN: the number of bytes that should be allocated for a
    link level header. Defaults to 14 for Ethernet. */
-
 #ifndef PBUF_LINK_HLEN
 #define PBUF_LINK_HLEN                  14
 #endif
 
 /* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. */
-
 #ifndef PBUF_POOL_BUFSIZE
 /* Default designed to accomodate single full size TCP frame in one PBUF */
 /* TCP_MSS + 40 for IP and TCP headers + physical layer headers */