1 /* Copyright (c) 2016, Google Inc.
3 * Permission to use, copy, modify, and/or distribute this software for any
4 * purpose with or without fee is hereby granted, provided that the above
5 * copyright notice and this permission notice appear in all copies.
7 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
8 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
9 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
10 * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
11 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
12 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
13 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
15 #ifndef OPENSSL_HEADER_POOL_H
16 #define OPENSSL_HEADER_POOL_H
18 #include <openssl/base.h>
20 #include <openssl/stack.h>
22 #if defined(__cplusplus)
27 // Buffers and buffer pools.
29 // |CRYPTO_BUFFER|s are simply reference-counted blobs. A |CRYPTO_BUFFER_POOL|
30 // is an intern table for |CRYPTO_BUFFER|s. This allows for a single copy of a
31 // given blob to be kept in memory and referenced from multiple places.
34 DEFINE_STACK_OF(CRYPTO_BUFFER)
36 // CRYPTO_BUFFER_POOL_new returns a freshly allocated |CRYPTO_BUFFER_POOL| or
38 OPENSSL_EXPORT CRYPTO_BUFFER_POOL* CRYPTO_BUFFER_POOL_new(void);
40 // CRYPTO_BUFFER_POOL_free frees |pool|, which must be empty.
41 OPENSSL_EXPORT void CRYPTO_BUFFER_POOL_free(CRYPTO_BUFFER_POOL *pool);
43 // CRYPTO_BUFFER_new returns a |CRYPTO_BUFFER| containing a copy of |data|, or
44 // else NULL on error. If |pool| is not NULL then the returned value may be a
45 // reference to a previously existing |CRYPTO_BUFFER| that contained the same
46 // data. Otherwise, the returned, fresh |CRYPTO_BUFFER| will be added to the
48 OPENSSL_EXPORT CRYPTO_BUFFER *CRYPTO_BUFFER_new(const uint8_t *data, size_t len,
49 CRYPTO_BUFFER_POOL *pool);
51 // CRYPTO_BUFFER_new_from_CBS acts the same as |CRYPTO_BUFFER_new|.
52 OPENSSL_EXPORT CRYPTO_BUFFER *CRYPTO_BUFFER_new_from_CBS(
53 CBS *cbs, CRYPTO_BUFFER_POOL *pool);
55 // CRYPTO_BUFFER_free decrements the reference count of |buf|. If there are no
56 // other references, or if the only remaining reference is from a pool, then
57 // |buf| will be freed.
58 OPENSSL_EXPORT void CRYPTO_BUFFER_free(CRYPTO_BUFFER *buf);
60 // CRYPTO_BUFFER_up_ref increments the reference count of |buf| and returns
62 OPENSSL_EXPORT int CRYPTO_BUFFER_up_ref(CRYPTO_BUFFER *buf);
64 // CRYPTO_BUFFER_data returns a pointer to the data contained in |buf|.
65 OPENSSL_EXPORT const uint8_t *CRYPTO_BUFFER_data(const CRYPTO_BUFFER *buf);
67 // CRYPTO_BUFFER_len returns the length, in bytes, of the data contained in
69 OPENSSL_EXPORT size_t CRYPTO_BUFFER_len(const CRYPTO_BUFFER *buf);
71 // CRYPTO_BUFFER_init_CBS initialises |out| to point at the data from |buf|.
72 OPENSSL_EXPORT void CRYPTO_BUFFER_init_CBS(const CRYPTO_BUFFER *buf, CBS *out);
75 #if defined(__cplusplus)
82 BORINGSSL_MAKE_DELETER(CRYPTO_BUFFER_POOL, CRYPTO_BUFFER_POOL_free)
83 BORINGSSL_MAKE_DELETER(CRYPTO_BUFFER, CRYPTO_BUFFER_free)
91 #endif // OPENSSL_HEADER_POOL_H