Mirror of BoringSSL (grpc依赖)
https://boringssl.googlesource.com/boringssl
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50 lines
2.1 KiB
50 lines
2.1 KiB
5 years ago
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/* Copyright (c) 2020, Google Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
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#ifndef OPENSSL_HEADER_CRYPTO_FORK_DETECT_H
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#define OPENSSL_HEADER_CRYPTO_FORK_DETECT_H
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#include <openssl/base.h>
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#if defined(__cplusplus)
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extern "C" {
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#endif
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// crypto_get_fork_generation returns the fork generation number for the current
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// process, or zero if not supported on the platform. The fork generation number
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// is a non-zero, strictly-monotonic counter with the property that, if queried
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// in an address space and then again in a subsequently forked copy, the forked
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// address space will observe a greater value.
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//
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// This function may be used to clear cached values across a fork. When
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// initializing a cache, record the fork generation. Before using the cache,
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// check if the fork generation has changed. If so, drop the cache and update
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// the save fork generation. Note this logic transparently handles platforms
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// which always return zero.
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//
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// This is not reliably supported on all platforms which implement |fork|, so it
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// should only be used as a hardening measure.
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OPENSSL_EXPORT uint64_t CRYPTO_get_fork_generation(void);
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// CRYPTO_fork_detect_ignore_madv_wipeonfork_for_testing is an internal detail
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// used for testing purposes.
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OPENSSL_EXPORT void CRYPTO_fork_detect_ignore_madv_wipeonfork_for_testing(void);
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#if defined(__cplusplus)
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} // extern C
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#endif
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#endif // OPENSSL_HEADER_CRYPTO_FORK_DETECT_H
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