Diff: features/FEATURE_LWIP/lwip-interface/emac_stack_lwip.cpp

Revision:

0:f269e3021894

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/features/FEATURE_LWIP/lwip-interface/emac_stack_lwip.cpp	Sun Oct 23 15:10:02 2016 +0000
@@ -0,0 +1,86 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2016 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#if DEVICE_EMAC
+
+#include "emac_stack_mem.h"
+#include "pbuf.h"
+
+emac_stack_mem_t *emac_stack_mem_alloc(emac_stack_t* stack, uint32_t size, uint32_t align)
+{
+
+    struct pbuf *pbuf = pbuf_alloc(PBUF_RAW, size + align, PBUF_RAM);
+    if (pbuf == NULL) {
+        return NULL;
+    }
+
+    if (align) {
+        uint32_t remainder = (uint32_t)pbuf->payload % align;
+        uint32_t offset = align - remainder;
+        if (offset >= align) {
+            offset = align;
+        }
+
+        pbuf->payload = (void*)((char*)pbuf->payload + offset);
+        pbuf->tot_len -= offset;
+        pbuf->len -= offset;
+    }
+
+    return (emac_stack_mem_t*)pbuf;
+}
+
+void emac_stack_mem_free(emac_stack_t* stack, emac_stack_mem_t *mem)
+{
+    pbuf_free((struct pbuf*)mem);
+}
+
+void *emac_stack_mem_ptr(emac_stack_t* stack, emac_stack_mem_t *mem)
+{
+    return ((struct pbuf*)mem)->payload;
+}
+
+uint32_t emac_stack_mem_len(emac_stack_t* stack, emac_stack_mem_t *mem)
+{
+    return ((struct pbuf*)mem)->len;
+}
+
+void emac_stack_mem_set_len(emac_stack_t* stack, emac_stack_mem_t *mem, uint32_t len)
+{
+    struct pbuf *pbuf = (struct pbuf*)mem;
+
+    pbuf->len = len;
+}
+
+emac_stack_mem_t *emac_stack_mem_chain_dequeue(emac_stack_t* stack, emac_stack_mem_chain_t **chain)
+{
+    struct pbuf **list = (struct pbuf**)chain;
+    struct pbuf *head = *list;
+    *list = (*list)->next;
+
+    return (emac_stack_mem_t *)head;
+}
+
+uint32_t emac_stack_mem_chain_len(emac_stack_t* stack, emac_stack_mem_chain_t *chain)
+{
+    return ((struct pbuf*)chain)->tot_len;
+}
+
+void emac_stack_mem_ref(emac_stack_t* stack, emac_stack_mem_t *mem)
+{
+    pbuf_ref((struct pbuf*)mem);
+}
+
+#endif /* DEVICE_EMAC */