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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> | |
0c07860d | 15 | #include <assert.h> |
116a02e3 JG |
16 | |
17 | #if defined(unix) || defined(__unix) || defined(__linux__) || defined(__APPLE__) || defined(__OpenBSD__) || defined(__NetBSD__) || defined(__QNX__) || defined(__QNXTO__) || defined(__HAIKU__) | |
18 | #include <sys/uio.h> | |
0c07860d | 19 | typedef struct iovec msgpack_iovec; |
116a02e3 | 20 | #else |
0c07860d | 21 | struct msgpack_iovec { |
116a02e3 JG |
22 | void *iov_base; |
23 | size_t iov_len; | |
24 | }; | |
0c07860d | 25 | typedef struct msgpack_iovec msgpack_iovec; |
116a02e3 JG |
26 | #endif |
27 | ||
28 | #ifdef __cplusplus | |
29 | extern "C" { | |
30 | #endif | |
31 | ||
32 | ||
33 | /** | |
34 | * @defgroup msgpack_vrefbuffer Vectored Referencing buffer | |
35 | * @ingroup msgpack_buffer | |
36 | * @{ | |
37 | */ | |
38 | ||
39 | struct msgpack_vrefbuffer_chunk; | |
40 | typedef struct msgpack_vrefbuffer_chunk msgpack_vrefbuffer_chunk; | |
41 | ||
42 | typedef struct msgpack_vrefbuffer_inner_buffer { | |
43 | size_t free; | |
44 | char* ptr; | |
45 | msgpack_vrefbuffer_chunk* head; | |
46 | } msgpack_vrefbuffer_inner_buffer; | |
47 | ||
48 | typedef struct msgpack_vrefbuffer { | |
0c07860d MJ |
49 | msgpack_iovec* tail; |
50 | msgpack_iovec* end; | |
51 | msgpack_iovec* array; | |
116a02e3 JG |
52 | |
53 | size_t chunk_size; | |
54 | size_t ref_size; | |
55 | ||
56 | msgpack_vrefbuffer_inner_buffer inner_buffer; | |
57 | } msgpack_vrefbuffer; | |
58 | ||
59 | ||
60 | #ifndef MSGPACK_VREFBUFFER_REF_SIZE | |
61 | #define MSGPACK_VREFBUFFER_REF_SIZE 32 | |
62 | #endif | |
63 | ||
64 | #ifndef MSGPACK_VREFBUFFER_CHUNK_SIZE | |
65 | #define MSGPACK_VREFBUFFER_CHUNK_SIZE 8192 | |
66 | #endif | |
67 | ||
68 | MSGPACK_DLLEXPORT | |
69 | bool msgpack_vrefbuffer_init(msgpack_vrefbuffer* vbuf, | |
70 | size_t ref_size, size_t chunk_size); | |
71 | MSGPACK_DLLEXPORT | |
72 | void msgpack_vrefbuffer_destroy(msgpack_vrefbuffer* vbuf); | |
73 | ||
74 | static inline msgpack_vrefbuffer* msgpack_vrefbuffer_new(size_t ref_size, size_t chunk_size); | |
75 | static inline void msgpack_vrefbuffer_free(msgpack_vrefbuffer* vbuf); | |
76 | ||
77 | static inline int msgpack_vrefbuffer_write(void* data, const char* buf, size_t len); | |
78 | ||
0c07860d | 79 | static inline const msgpack_iovec* msgpack_vrefbuffer_vec(const msgpack_vrefbuffer* vref); |
116a02e3 JG |
80 | static inline size_t msgpack_vrefbuffer_veclen(const msgpack_vrefbuffer* vref); |
81 | ||
82 | MSGPACK_DLLEXPORT | |
83 | int msgpack_vrefbuffer_append_copy(msgpack_vrefbuffer* vbuf, | |
84 | const char* buf, size_t len); | |
85 | ||
86 | MSGPACK_DLLEXPORT | |
87 | int msgpack_vrefbuffer_append_ref(msgpack_vrefbuffer* vbuf, | |
88 | const char* buf, size_t len); | |
89 | ||
90 | MSGPACK_DLLEXPORT | |
91 | int msgpack_vrefbuffer_migrate(msgpack_vrefbuffer* vbuf, msgpack_vrefbuffer* to); | |
92 | ||
93 | MSGPACK_DLLEXPORT | |
94 | void msgpack_vrefbuffer_clear(msgpack_vrefbuffer* vref); | |
95 | ||
96 | /** @} */ | |
97 | ||
98 | ||
99 | static inline msgpack_vrefbuffer* msgpack_vrefbuffer_new(size_t ref_size, size_t chunk_size) | |
100 | { | |
101 | msgpack_vrefbuffer* vbuf = (msgpack_vrefbuffer*)malloc(sizeof(msgpack_vrefbuffer)); | |
102 | if (vbuf == NULL) return NULL; | |
103 | if(!msgpack_vrefbuffer_init(vbuf, ref_size, chunk_size)) { | |
104 | free(vbuf); | |
105 | return NULL; | |
106 | } | |
107 | return vbuf; | |
108 | } | |
109 | ||
110 | static inline void msgpack_vrefbuffer_free(msgpack_vrefbuffer* vbuf) | |
111 | { | |
112 | if(vbuf == NULL) { return; } | |
113 | msgpack_vrefbuffer_destroy(vbuf); | |
114 | free(vbuf); | |
115 | } | |
116 | ||
117 | static inline int msgpack_vrefbuffer_write(void* data, const char* buf, size_t len) | |
118 | { | |
119 | msgpack_vrefbuffer* vbuf = (msgpack_vrefbuffer*)data; | |
0c07860d MJ |
120 | assert(buf || len == 0); |
121 | ||
122 | if(!buf) return 0; | |
116a02e3 JG |
123 | |
124 | if(len < vbuf->ref_size) { | |
125 | return msgpack_vrefbuffer_append_copy(vbuf, buf, len); | |
126 | } else { | |
127 | return msgpack_vrefbuffer_append_ref(vbuf, buf, len); | |
128 | } | |
129 | } | |
130 | ||
0c07860d | 131 | static inline const msgpack_iovec* msgpack_vrefbuffer_vec(const msgpack_vrefbuffer* vref) |
116a02e3 JG |
132 | { |
133 | return vref->array; | |
134 | } | |
135 | ||
136 | static inline size_t msgpack_vrefbuffer_veclen(const msgpack_vrefbuffer* vref) | |
137 | { | |
138 | return (size_t)(vref->tail - vref->array); | |
139 | } | |
140 | ||
141 | ||
142 | #ifdef __cplusplus | |
143 | } | |
144 | #endif | |
145 | ||
146 | #endif /* msgpack/vrefbuffer.h */ |