Merge pull request #2719 from haukepetersen/ng_opt_pktdump

net/ng_pktdump: manage stack internal and use msg queue

sys/auto_init/auto_init.c

@@ -86,6 +86,10 @@
 #include "l2_ping.h"
 #endif
 
+#ifdef MODULE_NG_PKTDUMP
+#include "net/ng_pktdump.h"
+#endif
+
 #define ENABLE_DEBUG (0)
 #include "debug.h"
 
@@ -272,4 +276,8 @@ void auto_init(void)
     DEBUG("Auto init transport layer module: [tcp].\n");
     tcp_init_transport_layer();
 #endif
+#ifdef MODULE_NG_PKTDUMP
+    DEBUG("Auto init ng_pktdump module.\n");
+    ng_pktdump_init();
+#endif
 }

sys/include/net/ng_pktdump.h

@@ -28,19 +28,42 @@
 extern "C" {
 #endif
 
+/**
+ * @brief   Message queue size for the pktdump thread
+ */
+#ifndef NG_PKTDUMP_MSG_QUEUE_SIZE
+#define NG_PKTDUMP_MSG_QUEUE_SIZE       (8U)
+#endif
+
+/**
+ * @brief   Priority of the pktdump thread
+ */
+#ifndef NG_PKTDUMP_PRIO
+#define NG_PKTDUMP_PRIO                 (PRIORITY_MIN - 1)
+#endif
+
+/**
+ * @brief   Stack size used for the pktdump thread
+ */
+#ifndef NG_PKTDUMP_STACKSIZE
+#define NG_PKTDUMP_STACKSIZE            (KERNEL_CONF_STACKSIZE_MAIN)
+#endif
+
+/**
+ * @brief   Get the PID of the pktdump thread
+ *
+ * @return  PID of the pktdump thread
+ * @return  @ref KERNEL_PID_UNDEF if not initialized
+ */
+kernel_pid_t ng_pktdump_getpid(void);
+
 /**
  * @brief   Start the packet dump thread and listening for incoming packets
  *
- * @param[in] stack         stack for the packet dump thread
+ * @return  PID of the pktdump thread
- * @param[in] stacksize     size of @p stack
+ * @return  negative value on error
- * @param[in] priority      priority of the packet dump thread
- * @param[in] name          name for the packet dump thread
- *
- * @return                  PID of newly created task on success
- * @return                  negative value on error
  */
-kernel_pid_t ng_pktdump_init(char *stack, int stacksize,
+kernel_pid_t ng_pktdump_init(void);
-                             char priority, char *name);
 
 #ifdef __cplusplus
 }

sys/net/crosslayer/ng_pktdump/ng_pktdump.c

@@ -22,9 +22,20 @@
 
 #include "thread.h"
 #include "msg.h"
+#include "kernel.h"
 #include "net/ng_pktdump.h"
 #include "net/ng_netbase.h"
 
+/**
+ * @brief   PID of the pktdump thread
+ */
+static kernel_pid_t _pid = KERNEL_PID_UNDEF;
+
+/**
+ * @brief   Stack for the pktdump thread
+ */
+static char _stack[NG_PKTDUMP_STACKSIZE];
+
 void _dump_type(ng_nettype_t type)
 {
     switch (type) {
@@ -90,6 +101,10 @@ void *_eventloop(void *arg)
 {
     (void)arg;
     msg_t msg;
+    msg_t msg_queue[NG_PKTDUMP_MSG_QUEUE_SIZE];
+
+    /* setup the message queue */
+    msg_init_queue(msg_queue, NG_PKTDUMP_MSG_QUEUE_SIZE);
 
     while (1) {
         msg_receive(&msg);
@@ -113,8 +128,16 @@ void *_eventloop(void *arg)
     return NULL;
 }
 
-kernel_pid_t ng_pktdump_init(char *stack, int stacksize,
+kernel_pid_t ng_pktdump_getpid(void)
-                             char priority, char *name)
 {
-    return thread_create(stack, stacksize, priority, 0, _eventloop, NULL, name);
+    return _pid;
+}
+
+kernel_pid_t ng_pktdump_init(void)
+{
+    if (_pid == KERNEL_PID_UNDEF) {
+        _pid = thread_create(_stack, sizeof(_stack), NG_PKTDUMP_PRIO,
+                             0, _eventloop, NULL, "pktdump");
+    }
+    return _pid;
 }

tests/driver_xbee/main.c

@@ -55,11 +55,6 @@ static xbee_t dev;
  */
 static char nomac_stack[KERNEL_CONF_STACKSIZE_DEFAULT];
 
-/**
- * @brief   Stack for the pktdump thread
- */
-static char dump_stack[KERNEL_CONF_STACKSIZE_MAIN];
-
 /**
  * @brief   Read chars from STDIO
  */
@@ -93,8 +88,7 @@ int main(void)
     ng_netif_init();
 
     /* initialize and register pktdump */
-    dump.pid = ng_pktdump_init(dump_stack, sizeof(dump_stack), PRIORITY_MAIN - 2,
+    dump.pid = ng_pktdump_getpid();
-                           "dump");
     if (dump.pid <= KERNEL_PID_UNDEF) {
         puts("Error starting pktdump thread");
         return -1;