mirror of https://github.com/ARMmbed/mbed-os.git
92 lines
2.4 KiB
C++
92 lines
2.4 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2016 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#if DEVICE_EMAC
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#include "emac_stack_mem.h"
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#include "pbuf.h"
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emac_stack_mem_t *emac_stack_mem_alloc(emac_stack_t* stack, uint32_t size, uint32_t align)
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{
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struct pbuf *pbuf = pbuf_alloc(PBUF_RAW, size + align, PBUF_RAM);
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if (pbuf == NULL) {
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return NULL;
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}
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if (align) {
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uint32_t remainder = (uint32_t)pbuf->payload % align;
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uint32_t offset = align - remainder;
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if (offset >= align) {
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offset = align;
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}
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pbuf->payload = (void*)((char*)pbuf->payload + offset);
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pbuf->tot_len -= offset;
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pbuf->len -= offset;
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}
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return (emac_stack_mem_t*)pbuf;
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}
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void emac_stack_mem_free(emac_stack_t* stack, emac_stack_mem_t *mem)
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{
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pbuf_free((struct pbuf*)mem);
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}
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void emac_stack_mem_copy(emac_stack_t* stack, emac_stack_mem_t *to, emac_stack_mem_t *from)
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{
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pbuf_copy((struct pbuf*)to, (struct pbuf*)from);
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}
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void *emac_stack_mem_ptr(emac_stack_t* stack, emac_stack_mem_t *mem)
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{
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return ((struct pbuf*)mem)->payload;
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}
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uint32_t emac_stack_mem_len(emac_stack_t* stack, emac_stack_mem_t *mem)
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{
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return ((struct pbuf*)mem)->len;
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}
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void emac_stack_mem_set_len(emac_stack_t* stack, emac_stack_mem_t *mem, uint32_t len)
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{
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struct pbuf *pbuf = (struct pbuf*)mem;
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pbuf->len = len;
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}
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emac_stack_mem_t *emac_stack_mem_chain_dequeue(emac_stack_t* stack, emac_stack_mem_chain_t **chain)
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{
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struct pbuf **list = (struct pbuf**)chain;
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struct pbuf *head = *list;
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*list = (*list)->next;
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return (emac_stack_mem_t *)head;
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}
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uint32_t emac_stack_mem_chain_len(emac_stack_t* stack, emac_stack_mem_chain_t *chain)
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{
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return ((struct pbuf*)chain)->tot_len;
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}
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void emac_stack_mem_ref(emac_stack_t* stack, emac_stack_mem_t *mem)
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{
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pbuf_ref((struct pbuf*)mem);
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}
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#endif /* DEVICE_EMAC */
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