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git.ipfire.org Git - thirdparty/openssl.git/blob - include/internal/refcount.h
2 * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
9 #ifndef HEADER_INTERNAL_REFCOUNT_H
10 # define HEADER_INTERNAL_REFCOUNT_H
12 /* Used to checking reference counts, most while doing perl5 stuff :-) */
13 # if defined(OPENSSL_NO_STDIO)
14 # if defined(REF_PRINT)
15 # error "REF_PRINT requires stdio"
19 # if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L \
20 && !defined(__STDC_NO_ATOMICS__)
21 # include <stdatomic.h>
22 # define HAVE_C11_ATOMICS
25 # if defined(HAVE_C11_ATOMICS) && defined(ATOMIC_INT_LOCK_FREE) \
26 && ATOMIC_INT_LOCK_FREE > 0
28 # define HAVE_ATOMICS 1
30 typedef _Atomic
int CRYPTO_REF_COUNT
;
32 static ossl_inline
int CRYPTO_UP_REF(_Atomic
int *val
, int *ret
, void *lock
)
34 *ret
= atomic_fetch_add_explicit(val
, 1, memory_order_relaxed
) + 1;
38 static ossl_inline
int CRYPTO_DOWN_REF(_Atomic
int *val
, int *ret
, void *lock
)
40 *ret
= atomic_fetch_sub_explicit(val
, 1, memory_order_release
) - 1;
42 atomic_thread_fence(memory_order_acquire
);
46 # elif defined(__GNUC__) && defined(__ATOMIC_RELAXED) && __GCC_ATOMIC_INT_LOCK_FREE > 0
48 # define HAVE_ATOMICS 1
50 typedef int CRYPTO_REF_COUNT
;
52 static ossl_inline
int CRYPTO_UP_REF(int *val
, int *ret
, void *lock
)
54 *ret
= __atomic_fetch_add(val
, 1, __ATOMIC_RELAXED
) + 1;
58 static ossl_inline
int CRYPTO_DOWN_REF(int *val
, int *ret
, void *lock
)
60 *ret
= __atomic_fetch_sub(val
, 1, __ATOMIC_RELEASE
) - 1;
62 __atomic_thread_fence(__ATOMIC_ACQUIRE
);
68 typedef int CRYPTO_REF_COUNT
;
70 # define CRYPTO_UP_REF(val, ret, lock) CRYPTO_atomic_add(val, 1, ret, lock)
71 # define CRYPTO_DOWN_REF(val, ret, lock) CRYPTO_atomic_add(val, -1, ret, lock)
75 # if !defined(NDEBUG) && !defined(OPENSSL_NO_STDIO)
76 # define REF_ASSERT_ISNT(test) \
77 (void)((test) ? (OPENSSL_die("refcount error", __FILE__, __LINE__), 1) : 0)
79 # define REF_ASSERT_ISNT(i)
83 # define REF_PRINT_COUNT(a, b) \
84 fprintf(stderr, "%p:%4d:%s\n", b, b->references, a)
86 # define REF_PRINT_COUNT(a, b)