1 /*
2 * nghttp2 - HTTP/2 C Library
3 *
4 * Copyright (c) 2016 Tatsuhiro Tsujikawa
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining
7 * a copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sublicense, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice shall be
15 * included in all copies or substantial portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 */
25 #include "nghttp2_rcbuf.h"
26
27 #include <string.h>
28 #include <assert.h>
29
30 #include "nghttp2_mem.h"
31 #include "nghttp2_helper.h"
32
nghttp2_rcbuf_new(nghttp2_rcbuf ** rcbuf_ptr,size_t size,nghttp2_mem * mem)33 int nghttp2_rcbuf_new(nghttp2_rcbuf **rcbuf_ptr, size_t size,
34 nghttp2_mem *mem) {
35 uint8_t *p;
36
37 p = nghttp2_mem_malloc(mem, sizeof(nghttp2_rcbuf) + size);
38 if (p == NULL) {
39 return NGHTTP2_ERR_NOMEM;
40 }
41
42 *rcbuf_ptr = (void *)p;
43
44 (*rcbuf_ptr)->mem_user_data = mem->mem_user_data;
45 (*rcbuf_ptr)->free = mem->free;
46 (*rcbuf_ptr)->base = p + sizeof(nghttp2_rcbuf);
47 (*rcbuf_ptr)->len = size;
48 (*rcbuf_ptr)->ref = 1;
49
50 return 0;
51 }
52
nghttp2_rcbuf_new2(nghttp2_rcbuf ** rcbuf_ptr,const uint8_t * src,size_t srclen,nghttp2_mem * mem)53 int nghttp2_rcbuf_new2(nghttp2_rcbuf **rcbuf_ptr, const uint8_t *src,
54 size_t srclen, nghttp2_mem *mem) {
55 int rv;
56
57 rv = nghttp2_rcbuf_new(rcbuf_ptr, srclen + 1, mem);
58 if (rv != 0) {
59 return rv;
60 }
61
62 (*rcbuf_ptr)->len = srclen;
63 *nghttp2_cpymem((*rcbuf_ptr)->base, src, srclen) = '\0';
64
65 return 0;
66 }
67
68 /*
69 * Frees |rcbuf| itself, regardless of its reference cout.
70 */
nghttp2_rcbuf_del(nghttp2_rcbuf * rcbuf)71 void nghttp2_rcbuf_del(nghttp2_rcbuf *rcbuf) {
72 nghttp2_mem_free2(rcbuf->free, rcbuf, rcbuf->mem_user_data);
73 }
74
nghttp2_rcbuf_incref(nghttp2_rcbuf * rcbuf)75 void nghttp2_rcbuf_incref(nghttp2_rcbuf *rcbuf) {
76 if (rcbuf->ref == -1) {
77 return;
78 }
79
80 ++rcbuf->ref;
81 }
82
nghttp2_rcbuf_decref(nghttp2_rcbuf * rcbuf)83 void nghttp2_rcbuf_decref(nghttp2_rcbuf *rcbuf) {
84 if (rcbuf == NULL || rcbuf->ref == -1) {
85 return;
86 }
87
88 assert(rcbuf->ref > 0);
89
90 if (--rcbuf->ref == 0) {
91 nghttp2_rcbuf_del(rcbuf);
92 }
93 }
94
nghttp2_rcbuf_get_buf(nghttp2_rcbuf * rcbuf)95 nghttp2_vec nghttp2_rcbuf_get_buf(nghttp2_rcbuf *rcbuf) {
96 nghttp2_vec res = {rcbuf->base, rcbuf->len};
97 return res;
98 }
99
nghttp2_rcbuf_is_static(const nghttp2_rcbuf * rcbuf)100 int nghttp2_rcbuf_is_static(const nghttp2_rcbuf *rcbuf) {
101 return rcbuf->ref == -1;
102 }
103