lwip - make lwip thread stack size configurable

Define tcpip-thread-stacksize and default-thread-stacksize in
lwip's mbed_lib.json, and use them accordingly in lwipopts.h.

Signed-off-by: Tony Wu <[email protected]>

Author: tung7970

features/FEATURE_LWIP/lwip-interface/lwipopts.h

@@ -80,18 +80,28 @@
 #define DEFAULT_RAW_RECVMBOX_SIZE   8
 #define DEFAULT_ACCEPTMBOX_SIZE     8
 
+// Thread stack size for lwip tcpip thread
+#ifndef MBED_CONF_LWIP_TCPIP_THREAD_STACKSIZE
+#define MBED_CONF_LWIP_TCPIP_THREAD_STACKSIZE      1200
+#endif
+
 #ifdef LWIP_DEBUG
-#define TCPIP_THREAD_STACKSIZE      1200*2
+#define TCPIP_THREAD_STACKSIZE      MBED_CONF_LWIP_TCPIP_THREAD_STACKSIZE*2
 #else
-#define TCPIP_THREAD_STACKSIZE      1200
+#define TCPIP_THREAD_STACKSIZE      MBED_CONF_LWIP_TCPIP_THREAD_STACKSIZE
 #endif
 
 #define TCPIP_THREAD_PRIO           (osPriorityNormal)
 
+// Thread stack size for lwip system threads
+#ifndef MBED_CONF_LWIP_DEFAULT_THREAD_STACKSIZE
+#define MBED_CONF_LWIP_DEFAULT_THREAD_STACKSIZE    512
+#endif
+
 #ifdef LWIP_DEBUG
-#define DEFAULT_THREAD_STACKSIZE    512*2
+#define DEFAULT_THREAD_STACKSIZE    MBED_CONF_LWIP_DEFAULT_THREAD_STACKSIZE*2
 #else
-#define DEFAULT_THREAD_STACKSIZE    512
+#define DEFAULT_THREAD_STACKSIZE    MBED_CONF_LWIP_DEFAULT_THREAD_STACKSIZE
 #endif
 
 #define MEMP_NUM_SYS_TIMEOUT        16

features/FEATURE_LWIP/lwip-interface/mbed_lib.json

@@ -32,6 +32,14 @@
         "udp-socket-max": {
             "help": "Maximum number of open UDPSocket instances allowed, including one used internally for DNS.  Each requires 84 bytes of pre-allocated RAM",
             "value": 4
+        },
+        "tcpip-thread-stacksize": {
+            "help": "Stack size for lwip TCPIP thread",
+            "value": 1200
+        },
+        "default-thread-stacksize": {
+            "help": "Stack size for lwip system threads",
+            "value": 512
         }
     }
 }