OpenCoverage

refcount.h

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/openssl/src/include/internal/refcount.h
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1/*-
2 * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.-
3 *-
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-
8 */-
9#ifndef HEADER_INTERNAL_REFCOUNT_H-
10# define HEADER_INTERNAL_REFCOUNT_H-
11-
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"-
16# endif-
17# endif-
18-
19# if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L \-
20 && !defined(__STDC_NO_ATOMICS__)-
21# include <stdatomic.h>-
22# define HAVE_C11_ATOMICS-
23# endif-
24-
25# if defined(HAVE_C11_ATOMICS) && defined(ATOMIC_INT_LOCK_FREE) \-
26 && ATOMIC_INT_LOCK_FREE > 0-
27-
28# define HAVE_ATOMICS 1-
29-
30typedef _Atomic int CRYPTO_REF_COUNT;-
31-
32static inline int CRYPTO_UP_REF(_Atomic int *val, int *ret, void *lock)-
33{-
34 *ret = atomic_fetch_add_explicit(val, 1, memory_order_relaxed) + 1;-
35 return 1;
executed 313408 times by 3 tests: return 1;
Executed by:
  • libcrypto.so.1.1
  • libssl.so.1.1
  • tls13encryptiontest
313408
36}-
37-
38/*-
39 * Changes to shared structure other than reference counter have to be-
40 * serialized. And any kind of serialization implies a release fence. This-
41 * means that by the time reference counter is decremented all other-
42 * changes are visible on all processors. Hence decrement itself can be-
43 * relaxed. In case it hits zero, object will be destructed. Since it's-
44 * last use of the object, destructor programmer might reason that access-
45 * to mutable members doesn't have to be serialized anymore, which would-
46 * otherwise imply an acquire fence. Hence conditional acquire fence...-
47 */-
48static inline int CRYPTO_DOWN_REF(_Atomic int *val, int *ret, void *lock)-
49{-
50 *ret = atomic_fetch_sub_explicit(val, 1, memory_order_relaxed) - 1;-
51 if (*ret == 0)
*ret == 0Description
TRUEevaluated 528821 times by 14 tests
Evaluated by:
  • asn1_internal_test
  • chacha_internal_test
  • ctype_internal_test
  • curve448_internal_test
  • libcrypto.so.1.1
  • libssl.so.1.1
  • modes_internal_test
  • poly1305_internal_test
  • rdrand_sanitytest
  • siphash_internal_test
  • sm2_internal_test
  • sm4_internal_test
  • tls13encryptiontest
  • x509_internal_test
FALSEevaluated 320003 times by 3 tests
Evaluated by:
  • libcrypto.so.1.1
  • libssl.so.1.1
  • tls13encryptiontest
320003-528821
52 atomic_thread_fence(memory_order_acquire);
executed 528821 times by 14 tests: __atomic_thread_fence ( memory_order_acquire ) ;
Executed by:
  • asn1_internal_test
  • chacha_internal_test
  • ctype_internal_test
  • curve448_internal_test
  • libcrypto.so.1.1
  • libssl.so.1.1
  • modes_internal_test
  • poly1305_internal_test
  • rdrand_sanitytest
  • siphash_internal_test
  • sm2_internal_test
  • sm4_internal_test
  • tls13encryptiontest
  • x509_internal_test
528821
53 return 1;
executed 848824 times by 14 tests: return 1;
Executed by:
  • asn1_internal_test
  • chacha_internal_test
  • ctype_internal_test
  • curve448_internal_test
  • libcrypto.so.1.1
  • libssl.so.1.1
  • modes_internal_test
  • poly1305_internal_test
  • rdrand_sanitytest
  • siphash_internal_test
  • sm2_internal_test
  • sm4_internal_test
  • tls13encryptiontest
  • x509_internal_test
848824
54}-
55-
56# elif defined(__GNUC__) && defined(__ATOMIC_RELAXED) && __GCC_ATOMIC_INT_LOCK_FREE > 0-
57-
58# define HAVE_ATOMICS 1-
59-
60typedef int CRYPTO_REF_COUNT;-
61-
62static __inline__ int CRYPTO_UP_REF(int *val, int *ret, void *lock)-
63{-
64 *ret = __atomic_fetch_add(val, 1, __ATOMIC_RELAXED) + 1;-
65 return 1;-
66}-
67-
68static __inline__ int CRYPTO_DOWN_REF(int *val, int *ret, void *lock)-
69{-
70 *ret = __atomic_fetch_sub(val, 1, __ATOMIC_RELAXED) - 1;-
71 if (*ret == 0)-
72 __atomic_thread_fence(__ATOMIC_ACQUIRE);-
73 return 1;-
74}-
75-
76# elif defined(_MSC_VER) && _MSC_VER>=1200-
77-
78# define HAVE_ATOMICS 1-
79-
80typedef volatile int CRYPTO_REF_COUNT;-
81-
82# if (defined(_M_ARM) && _M_ARM>=7) || defined(_M_ARM64)-
83# include <intrin.h>-
84# if defined(_M_ARM64) && !defined(_ARM_BARRIER_ISH)-
85# define _ARM_BARRIER_ISH _ARM64_BARRIER_ISH-
86# endif-
87-
88static __inline int CRYPTO_UP_REF(volatile int *val, int *ret, void *lock)-
89{-
90 *ret = _InterlockedExchangeAdd_nf(val, 1) + 1;-
91 return 1;-
92}-
93-
94static __inline int CRYPTO_DOWN_REF(volatile int *val, int *ret, void *lock)-
95{-
96 *ret = _InterlockedExchangeAdd_nf(val, -1) - 1;-
97 if (*ret == 0)-
98 __dmb(_ARM_BARRIER_ISH);-
99 return 1;-
100}-
101# else-
102# pragma intrinsic(_InterlockedExchangeAdd)-
103-
104static __inline int CRYPTO_UP_REF(volatile int *val, int *ret, void *lock)-
105{-
106 *ret = _InterlockedExchangeAdd(val, 1) + 1;-
107 return 1;-
108}-
109-
110static __inline int CRYPTO_DOWN_REF(volatile int *val, int *ret, void *lock)-
111{-
112 *ret = _InterlockedExchangeAdd(val, -1) - 1;-
113 return 1;-
114}-
115# endif-
116-
117# else-
118-
119typedef int CRYPTO_REF_COUNT;-
120-
121# define CRYPTO_UP_REF(val, ret, lock) CRYPTO_atomic_add(val, 1, ret, lock)-
122# define CRYPTO_DOWN_REF(val, ret, lock) CRYPTO_atomic_add(val, -1, ret, lock)-
123-
124# endif-
125-
126# if !defined(NDEBUG) && !defined(OPENSSL_NO_STDIO)-
127# define REF_ASSERT_ISNT(test) \-
128 (void)((test) ? (OPENSSL_die("refcount error", __FILE__, __LINE__), 1) : 0)-
129# else-
130# define REF_ASSERT_ISNT(i)-
131# endif-
132-
133# ifdef REF_PRINT-
134# define REF_PRINT_COUNT(a, b) \-
135 fprintf(stderr, "%p:%4d:%s\n", b, b->references, a)-
136# else-
137# define REF_PRINT_COUNT(a, b)-
138# endif-
139-
140#endif-
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