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author | Matt Caswell <matt@openssl.org> | 2020-12-22 17:43:07 +0000 |
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committer | Dmitry Belyavskiy <beldmit@gmail.com> | 2020-12-31 13:14:38 +0100 |
commit | d5e742de653954bfae88f0e5f6c8f0a7a5f6c437 (patch) | |
tree | b1482462356926eb9e213f2c0294f45cea517e01 /crypto/threads_pthread.c | |
parent | 30af356df487b2dad571be15574b454daf70743c (diff) | |
download | openssl-new-d5e742de653954bfae88f0e5f6c8f0a7a5f6c437.tar.gz |
Add some more CRYPTO_atomic functions
We add an implementation for CRYPTO_atomic_or() and CRYPTO_atomic_load()
Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
(Merged from https://github.com/openssl/openssl/pull/13733)
Diffstat (limited to 'crypto/threads_pthread.c')
-rw-r--r-- | crypto/threads_pthread.c | 50 |
1 files changed, 49 insertions, 1 deletions
diff --git a/crypto/threads_pthread.c b/crypto/threads_pthread.c index afc29b7961..22ba793161 100644 --- a/crypto/threads_pthread.c +++ b/crypto/threads_pthread.c @@ -185,7 +185,7 @@ int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock) return 1; } # endif - if (!CRYPTO_THREAD_write_lock(lock)) + if (lock == NULL || !CRYPTO_THREAD_write_lock(lock)) return 0; *val += amount; @@ -197,6 +197,54 @@ int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock) return 1; } +int CRYPTO_atomic_or(uint64_t *val, uint64_t op, uint64_t *ret, + CRYPTO_RWLOCK *lock) +{ +# if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL) + if (__atomic_is_lock_free(sizeof(*val), val)) { + *ret = __atomic_or_fetch(val, op, __ATOMIC_ACQ_REL); + return 1; + } +# elif defined(__sun) && (defined(__SunOS_5_10) || defined(__SunOS_5_11)) + /* This will work for all future Solaris versions. */ + if (ret != NULL) { + *ret = atomic_or_64_nv(val, op); + return 1; + } +# endif + if (lock == NULL || !CRYPTO_THREAD_write_lock(lock)) + return 0; + *val |= op; + *ret = *val; + + if (!CRYPTO_THREAD_unlock(lock)) + return 0; + + return 1; +} + +int CRYPTO_atomic_load(uint64_t *val, uint64_t *ret, CRYPTO_RWLOCK *lock) +{ +# if defined(__GNUC__) && defined(__ATOMIC_ACQUIRE) + if (__atomic_is_lock_free(sizeof(*val), val)) { + __atomic_load(val, ret, __ATOMIC_ACQUIRE); + return 1; + } +# elif defined(__sun) && (defined(__SunOS_5_10) || defined(__SunOS_5_11)) + /* This will work for all future Solaris versions. */ + if (ret != NULL) { + *ret = atomic_or_64_nv(val, 0); + return 1; + } +# endif + if (lock == NULL || !CRYPTO_THREAD_read_lock(lock)) + return 0; + *ret = *val; + if (!CRYPTO_THREAD_unlock(lock)) + return 0; + + return 1; +} # ifndef FIPS_MODULE # ifdef OPENSSL_SYS_UNIX |