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Simple HTTP client with HTTP/1.1, HTTP/2, and HTTP/3 support

Security advisory: This version has known vulnerabilities. View advisories
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hackney c_src boringssl include openssl pool.h
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c_src/boringssl/include/openssl/pool.h 

// Copyright 2016 The BoringSSL Authors

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//     https://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.



#ifndef OPENSSL_HEADER_POOL_H

#define OPENSSL_HEADER_POOL_H



#include <openssl/base.h>   // IWYU pragma: export



#include <openssl/stack.h>



#if defined(__cplusplus)

extern "C" {

#endif





// Buffers and buffer pools.

//

// |CRYPTO_BUFFER|s are simply reference-counted blobs. A |CRYPTO_BUFFER_POOL|

// is an intern table for |CRYPTO_BUFFER|s. This allows for a single copy of a

// given blob to be kept in memory and referenced from multiple places.





DEFINE_STACK_OF(CRYPTO_BUFFER)



// CRYPTO_BUFFER_POOL_new returns a freshly allocated |CRYPTO_BUFFER_POOL| or

// NULL on error.

OPENSSL_EXPORT CRYPTO_BUFFER_POOL* CRYPTO_BUFFER_POOL_new(void);



// CRYPTO_BUFFER_POOL_free frees |pool|, which must be empty.

OPENSSL_EXPORT void CRYPTO_BUFFER_POOL_free(CRYPTO_BUFFER_POOL *pool);



// CRYPTO_BUFFER_new returns a |CRYPTO_BUFFER| containing a copy of |data|, or

// else NULL on error. If |pool| is not NULL then the returned value may be a

// reference to a previously existing |CRYPTO_BUFFER| that contained the same

// data. Otherwise, the returned, fresh |CRYPTO_BUFFER| will be added to the

// pool.

OPENSSL_EXPORT CRYPTO_BUFFER *CRYPTO_BUFFER_new(const uint8_t *data, size_t len,

                                                CRYPTO_BUFFER_POOL *pool);



// CRYPTO_BUFFER_alloc creates an unpooled |CRYPTO_BUFFER| of the given size and

// writes the underlying data pointer to |*out_data|. It returns NULL on error.

//

// After calling this function, |len| bytes of contents must be written to

// |out_data| before passing the returned pointer to any other BoringSSL

// functions. Once initialized, the |CRYPTO_BUFFER| should be treated as

// immutable.

OPENSSL_EXPORT CRYPTO_BUFFER *CRYPTO_BUFFER_alloc(uint8_t **out_data,

                                                  size_t len);



// CRYPTO_BUFFER_new_from_CBS acts the same as |CRYPTO_BUFFER_new|.

OPENSSL_EXPORT CRYPTO_BUFFER *CRYPTO_BUFFER_new_from_CBS(

    const CBS *cbs, CRYPTO_BUFFER_POOL *pool);



// CRYPTO_BUFFER_new_from_static_data_unsafe behaves like |CRYPTO_BUFFER_new|

// but does not copy |data|. |data| must be immutable and last for the lifetime

// of the address space.

OPENSSL_EXPORT CRYPTO_BUFFER *CRYPTO_BUFFER_new_from_static_data_unsafe(

    const uint8_t *data, size_t len, CRYPTO_BUFFER_POOL *pool);



// CRYPTO_BUFFER_free decrements the reference count of |buf|. If there are no

// other references, or if the only remaining reference is from a pool, then

// |buf| will be freed.

OPENSSL_EXPORT void CRYPTO_BUFFER_free(CRYPTO_BUFFER *buf);



// CRYPTO_BUFFER_up_ref increments the reference count of |buf| and returns

// one.

OPENSSL_EXPORT int CRYPTO_BUFFER_up_ref(CRYPTO_BUFFER *buf);



// CRYPTO_BUFFER_data returns a pointer to the data contained in |buf|.

OPENSSL_EXPORT const uint8_t *CRYPTO_BUFFER_data(const CRYPTO_BUFFER *buf);



// CRYPTO_BUFFER_len returns the length, in bytes, of the data contained in

// |buf|.

OPENSSL_EXPORT size_t CRYPTO_BUFFER_len(const CRYPTO_BUFFER *buf);



// CRYPTO_BUFFER_init_CBS initialises |out| to point at the data from |buf|.

OPENSSL_EXPORT void CRYPTO_BUFFER_init_CBS(const CRYPTO_BUFFER *buf, CBS *out);





#if defined(__cplusplus)

}  // extern C



extern "C++" {



BSSL_NAMESPACE_BEGIN



BORINGSSL_MAKE_DELETER(CRYPTO_BUFFER_POOL, CRYPTO_BUFFER_POOL_free)

BORINGSSL_MAKE_DELETER(CRYPTO_BUFFER, CRYPTO_BUFFER_free)

BORINGSSL_MAKE_UP_REF(CRYPTO_BUFFER, CRYPTO_BUFFER_up_ref)



BSSL_NAMESPACE_END



}  // extern C++



#endif



#endif  // OPENSSL_HEADER_POOL_H