mirror of
https://github.com/msgpack/msgpack-c.git
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111 lines
2.7 KiB
C
111 lines
2.7 KiB
C
/*
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* MessagePack for C zero-copy buffer implementation
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*
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* Copyright (C) 2008-2009 FURUHASHI Sadayuki
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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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#ifndef MSGPACK_VREFBUFFER_H__
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#define MSGPACK_VREFBUFFER_H__
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#include "msgpack/zone.h"
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#ifndef _WIN32
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#include <sys/uio.h>
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#else
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struct iovec {
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void *iov_base;
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size_t iov_len;
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};
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#endif
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#ifndef MSGPACK_VREFBUFFER_REF_SIZE
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#define MSGPACK_VREFBUFFER_REF_SIZE 32
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#endif
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#ifndef MSGPACK_VREFBUFFER_CHUNK_SIZE
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#define MSGPACK_VREFBUFFER_CHUNK_SIZE 8192
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct msgpack_vrefbuffer_chunk;
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typedef struct msgpack_vrefbuffer_chunk msgpack_vrefbuffer_chunk;
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typedef struct msgpack_vrefbuffer_inner_buffer {
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size_t free;
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char* ptr;
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msgpack_vrefbuffer_chunk* head;
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} msgpack_vrefbuffer_inner_buffer;
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typedef struct msgpack_vrefbuffer {
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struct iovec* tail;
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struct iovec* end;
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struct iovec* array;
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size_t chunk_size;
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size_t ref_size;
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msgpack_vrefbuffer_inner_buffer inner_buffer;
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} msgpack_vrefbuffer;
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bool msgpack_vrefbuffer_init(msgpack_vrefbuffer* vbuf,
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size_t ref_size, size_t chunk_size);
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void msgpack_vrefbuffer_destroy(msgpack_vrefbuffer* vbuf);
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static inline int msgpack_vrefbuffer_write(void* data, const char* buf, unsigned int len);
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static inline const struct iovec* msgpack_vrefbuffer_vec(const msgpack_vrefbuffer* vref);
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static inline size_t msgpack_vrefbuffer_veclen(const msgpack_vrefbuffer* vref);
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int msgpack_vrefbuffer_append_copy(msgpack_vrefbuffer* vbuf,
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const char* buf, unsigned int len);
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int msgpack_vrefbuffer_append_ref(msgpack_vrefbuffer* vbuf,
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const char* buf, unsigned int len);
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int msgpack_vrefbuffer_migrate(msgpack_vrefbuffer* vbuf, msgpack_vrefbuffer* to);
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int msgpack_vrefbuffer_write(void* data, const char* buf, unsigned int len)
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{
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msgpack_vrefbuffer* vbuf = (msgpack_vrefbuffer*)data;
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if(len < vbuf->ref_size) {
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return msgpack_vrefbuffer_append_copy(vbuf, buf, len);
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} else {
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return msgpack_vrefbuffer_append_ref(vbuf, buf, len);
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}
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}
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const struct iovec* msgpack_vrefbuffer_vec(const msgpack_vrefbuffer* vref)
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{
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return vref->array;
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}
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size_t msgpack_vrefbuffer_veclen(const msgpack_vrefbuffer* vref)
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{
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return vref->tail - vref->array;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* msgpack/vrefbuffer.h */
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