Fix Packet Stacks for non-TLS Operating Systems

On non-TLS systems, check each time the Thread Local Storage
is requested and if it has not been initialized for this thread, initialize it.
The prevents not initializing the worker threads in autofp run mode.

src/tmqh-packetpool.c

@@ -58,23 +58,12 @@ static inline PktPool *GetThreadPacketPool(void)
 {
     return &thread_pkt_pool;
 }
-
-static inline PktPool *ThreadPacketPoolCreate(void)
-{
-    /* Nothing to do since __thread statically allocates the memory. */
-    return GetThreadPacketPool();
-}
 #else
 /* __thread not supported. */
 static pthread_key_t pkt_pool_thread_key;
 static SCMutex pkt_pool_thread_key_mutex = SCMUTEX_INITIALIZER;
 static int pkt_pool_thread_key_initialized = 0;
 
-static inline PktPool *GetThreadPacketPool(void)
-{
-    return (PktPool*)pthread_getspecific(pkt_pool_thread_key);
-}
-
 static void PktPoolThreadDestroy(void * buf)
 {
     free(buf);
@@ -102,15 +91,10 @@ static void TmqhPacketpoolInit(void)
     SCMutexUnlock(&pkt_pool_thread_key_mutex);
 }
 
-static inline PktPool *ThreadPacketPoolCreate(void)
+static PktPool *ThreadPacketPoolCreate(void)
 {
     TmqhPacketpoolInit();
 
-    /* Check that the pool is not already created */
-    PktPool *pool = GetThreadPacketPool();
-    if (pool)
-        return pool;
-
     /* Create a new pool for this thread. */
     pool = (PktPool*)SCMallocAligned(sizeof(PktPool), CLS);
     if (pool == NULL) {
@@ -125,6 +109,15 @@ static inline PktPool *ThreadPacketPoolCreate(void)
 
     return pool;
 }
+
+static inline PktPool *GetThreadPacketPool(void)
+{
+    PktPool* pool = (PktPool*)pthread_getspecific(pkt_pool_thread_key);
+    if (pool == NULL)
+      pool = ThreadPacketPoolCreate();
+    
+    return pool;
+}
 #endif
 
 /**
@@ -168,6 +161,15 @@ static void PacketPoolStorePacket(Packet *p)
     PacketPoolReturnPacket(p);
 }
 
+static void PacketPoolGetReturnedPackets(PktPool *pool)
+{
+    SCMutexLock(&pool->return_stack.mutex);
+    /* Move all the packets from the locked return stack to the local stack. */
+    pool->head = pool->return_stack.head;
+    pool->return_stack.head = NULL;
+    SCMutexUnlock(&pool->return_stack.mutex);
+}
+
 /** \brief Get a new packet from the packet pool
  *
  * Only allocates from the thread's local stack, or mallocs new packets.
@@ -189,11 +191,7 @@ Packet *PacketPoolGetPacket(void)
 
     /* Local Stack is empty, so check the return stack, which requires
      * locking. */
-    SCMutexLock(&pool->return_stack.mutex);
-    /* Move all the packets from the locked return stack to the local stack. */
-    pool->head = pool->return_stack.head;
-    pool->return_stack.head = NULL;
-    SCMutexUnlock(&pool->return_stack.mutex);
+    PacketPoolGetReturnedPackets(pool);
 
     /* Try to allocate again. Need to check for not empty again, since the
      * return stack might have been empty too.
@@ -266,7 +264,7 @@ void PacketPoolInit(void)
 {
     extern intmax_t max_pending_packets;
 
-    PktPool *my_pool = ThreadPacketPoolCreate();
+    PktPool *my_pool = GetThreadPacketPool();
 
     SCMutexInit(&my_pool->return_stack.mutex, NULL);