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116a02e3 JG |
1 | /* |
2 | * MessagePack for C zero-copy buffer implementation | |
3 | * | |
4 | * Copyright (C) 2008-2009 FURUHASHI Sadayuki | |
5 | * | |
6 | * Distributed under the Boost Software License, Version 1.0. | |
7 | * (See accompanying file LICENSE_1_0.txt or copy at | |
8 | * http://www.boost.org/LICENSE_1_0.txt) | |
9 | */ | |
10 | #ifndef MSGPACK_VREFBUFFER_H | |
11 | #define MSGPACK_VREFBUFFER_H | |
12 | ||
13 | #include "zone.h" | |
14 | #include <stdlib.h> | |
15 | ||
16 | #if defined(unix) || defined(__unix) || defined(__linux__) || defined(__APPLE__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__QNX__) || defined(__QNXTO__) || defined(__HAIKU__) | |
17 | #include <sys/uio.h> | |
18 | #else | |
19 | struct iovec { | |
20 | void *iov_base; | |
21 | size_t iov_len; | |
22 | }; | |
23 | #endif | |
24 | ||
25 | #ifdef __cplusplus | |
26 | extern "C" { | |
27 | #endif | |
28 | ||
29 | ||
30 | /** | |
31 | * @defgroup msgpack_vrefbuffer Vectored Referencing buffer | |
32 | * @ingroup msgpack_buffer | |
33 | * @{ | |
34 | */ | |
35 | ||
36 | struct msgpack_vrefbuffer_chunk; | |
37 | typedef struct msgpack_vrefbuffer_chunk msgpack_vrefbuffer_chunk; | |
38 | ||
39 | typedef struct msgpack_vrefbuffer_inner_buffer { | |
40 | size_t free; | |
41 | char* ptr; | |
42 | msgpack_vrefbuffer_chunk* head; | |
43 | } msgpack_vrefbuffer_inner_buffer; | |
44 | ||
45 | typedef struct msgpack_vrefbuffer { | |
46 | struct iovec* tail; | |
47 | struct iovec* end; | |
48 | struct iovec* array; | |
49 | ||
50 | size_t chunk_size; | |
51 | size_t ref_size; | |
52 | ||
53 | msgpack_vrefbuffer_inner_buffer inner_buffer; | |
54 | } msgpack_vrefbuffer; | |
55 | ||
56 | ||
57 | #ifndef MSGPACK_VREFBUFFER_REF_SIZE | |
58 | #define MSGPACK_VREFBUFFER_REF_SIZE 32 | |
59 | #endif | |
60 | ||
61 | #ifndef MSGPACK_VREFBUFFER_CHUNK_SIZE | |
62 | #define MSGPACK_VREFBUFFER_CHUNK_SIZE 8192 | |
63 | #endif | |
64 | ||
65 | MSGPACK_DLLEXPORT | |
66 | bool msgpack_vrefbuffer_init(msgpack_vrefbuffer* vbuf, | |
67 | size_t ref_size, size_t chunk_size); | |
68 | MSGPACK_DLLEXPORT | |
69 | void msgpack_vrefbuffer_destroy(msgpack_vrefbuffer* vbuf); | |
70 | ||
71 | static inline msgpack_vrefbuffer* msgpack_vrefbuffer_new(size_t ref_size, size_t chunk_size); | |
72 | static inline void msgpack_vrefbuffer_free(msgpack_vrefbuffer* vbuf); | |
73 | ||
74 | static inline int msgpack_vrefbuffer_write(void* data, const char* buf, size_t len); | |
75 | ||
76 | static inline const struct iovec* msgpack_vrefbuffer_vec(const msgpack_vrefbuffer* vref); | |
77 | static inline size_t msgpack_vrefbuffer_veclen(const msgpack_vrefbuffer* vref); | |
78 | ||
79 | MSGPACK_DLLEXPORT | |
80 | int msgpack_vrefbuffer_append_copy(msgpack_vrefbuffer* vbuf, | |
81 | const char* buf, size_t len); | |
82 | ||
83 | MSGPACK_DLLEXPORT | |
84 | int msgpack_vrefbuffer_append_ref(msgpack_vrefbuffer* vbuf, | |
85 | const char* buf, size_t len); | |
86 | ||
87 | MSGPACK_DLLEXPORT | |
88 | int msgpack_vrefbuffer_migrate(msgpack_vrefbuffer* vbuf, msgpack_vrefbuffer* to); | |
89 | ||
90 | MSGPACK_DLLEXPORT | |
91 | void msgpack_vrefbuffer_clear(msgpack_vrefbuffer* vref); | |
92 | ||
93 | /** @} */ | |
94 | ||
95 | ||
96 | static inline msgpack_vrefbuffer* msgpack_vrefbuffer_new(size_t ref_size, size_t chunk_size) | |
97 | { | |
98 | msgpack_vrefbuffer* vbuf = (msgpack_vrefbuffer*)malloc(sizeof(msgpack_vrefbuffer)); | |
99 | if (vbuf == NULL) return NULL; | |
100 | if(!msgpack_vrefbuffer_init(vbuf, ref_size, chunk_size)) { | |
101 | free(vbuf); | |
102 | return NULL; | |
103 | } | |
104 | return vbuf; | |
105 | } | |
106 | ||
107 | static inline void msgpack_vrefbuffer_free(msgpack_vrefbuffer* vbuf) | |
108 | { | |
109 | if(vbuf == NULL) { return; } | |
110 | msgpack_vrefbuffer_destroy(vbuf); | |
111 | free(vbuf); | |
112 | } | |
113 | ||
114 | static inline int msgpack_vrefbuffer_write(void* data, const char* buf, size_t len) | |
115 | { | |
116 | msgpack_vrefbuffer* vbuf = (msgpack_vrefbuffer*)data; | |
117 | ||
118 | if(len < vbuf->ref_size) { | |
119 | return msgpack_vrefbuffer_append_copy(vbuf, buf, len); | |
120 | } else { | |
121 | return msgpack_vrefbuffer_append_ref(vbuf, buf, len); | |
122 | } | |
123 | } | |
124 | ||
125 | static inline const struct iovec* msgpack_vrefbuffer_vec(const msgpack_vrefbuffer* vref) | |
126 | { | |
127 | return vref->array; | |
128 | } | |
129 | ||
130 | static inline size_t msgpack_vrefbuffer_veclen(const msgpack_vrefbuffer* vref) | |
131 | { | |
132 | return (size_t)(vref->tail - vref->array); | |
133 | } | |
134 | ||
135 | ||
136 | #ifdef __cplusplus | |
137 | } | |
138 | #endif | |
139 | ||
140 | #endif /* msgpack/vrefbuffer.h */ |