/* * Copyright 2016-2019 The OpenSSL Project Authors. All Rights Reserved. * * Licensed under the OpenSSL license (the "License"). You may not use * this file except in compliance with the License. You can obtain a copy * in the file LICENSE in the source distribution or at * https://www.openssl.org/source/license.html */ #include <openssl/crypto.h> #include "internal/cryptlib.h" #if defined(OPENSSL_THREADS) && !defined(CRYPTO_TDEBUG) && !defined(OPENSSL_SYS_WINDOWS) # if defined(OPENSSL_SYS_UNIX) # include <sys/types.h> # include <unistd.h> #endif # ifdef PTHREAD_RWLOCK_INITIALIZER # define USE_RWLOCK # endif CRYPTO_RWLOCK *CRYPTO_THREAD_lock_new(void) { # ifdef USE_RWLOCK CRYPTO_RWLOCK *lock; if ((lock = OPENSSL_zalloc(sizeof(pthread_rwlock_t))) == NULL) { /* Don't set error, to avoid recursion blowup. */ return NULL; } if (pthread_rwlock_init(lock, NULL) != 0) { OPENSSL_free(lock); return NULL; } # else pthread_mutexattr_t attr; CRYPTO_RWLOCK *lock; if ((lock = OPENSSL_zalloc(sizeof(pthread_mutex_t))) == NULL) { /* Don't set error, to avoid recursion blowup. */ return NULL; } pthread_mutexattr_init(&attr); pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); if (pthread_mutex_init(lock, &attr) != 0) { pthread_mutexattr_destroy(&attr); OPENSSL_free(lock); return NULL; } pthread_mutexattr_destroy(&attr); # endif return lock; } int CRYPTO_THREAD_read_lock(CRYPTO_RWLOCK *lock) { # ifdef USE_RWLOCK if (pthread_rwlock_rdlock(lock) != 0) return 0; # else if (pthread_mutex_lock(lock) != 0) return 0; # endif return 1; } int CRYPTO_THREAD_write_lock(CRYPTO_RWLOCK *lock) { # ifdef USE_RWLOCK if (pthread_rwlock_wrlock(lock) != 0) return 0; # else if (pthread_mutex_lock(lock) != 0) return 0; # endif return 1; } int CRYPTO_THREAD_unlock(CRYPTO_RWLOCK *lock) { # ifdef USE_RWLOCK if (pthread_rwlock_unlock(lock) != 0) return 0; # else if (pthread_mutex_unlock(lock) != 0) return 0; # endif return 1; } void CRYPTO_THREAD_lock_free(CRYPTO_RWLOCK *lock) { if (lock == NULL) return; # ifdef USE_RWLOCK pthread_rwlock_destroy(lock); # else pthread_mutex_destroy(lock); # endif OPENSSL_free(lock); return; } int CRYPTO_THREAD_run_once(CRYPTO_ONCE *once, void (*init)(void)) { if (pthread_once(once, init) != 0) return 0; return 1; } int CRYPTO_THREAD_init_local(CRYPTO_THREAD_LOCAL *key, void (*cleanup)(void *)) { if (pthread_key_create(key, cleanup) != 0) return 0; return 1; } void *CRYPTO_THREAD_get_local(CRYPTO_THREAD_LOCAL *key) { return pthread_getspecific(*key); } int CRYPTO_THREAD_set_local(CRYPTO_THREAD_LOCAL *key, void *val) { if (pthread_setspecific(*key, val) != 0) return 0; return 1; } int CRYPTO_THREAD_cleanup_local(CRYPTO_THREAD_LOCAL *key) { if (pthread_key_delete(*key) != 0) return 0; return 1; } CRYPTO_THREAD_ID CRYPTO_THREAD_get_current_id(void) { return pthread_self(); } int CRYPTO_THREAD_compare_id(CRYPTO_THREAD_ID a, CRYPTO_THREAD_ID b) { return pthread_equal(a, b); } int CRYPTO_atomic_add(int *val, int amount, int *ret, CRYPTO_RWLOCK *lock) { # if defined(__GNUC__) && defined(__ATOMIC_ACQ_REL) if (__atomic_is_lock_free(sizeof(*val), val)) { *ret = __atomic_add_fetch(val, amount, __ATOMIC_ACQ_REL); return 1; } # endif if (!CRYPTO_THREAD_write_lock(lock)) return 0; *val += amount; *ret = *val; if (!CRYPTO_THREAD_unlock(lock)) return 0; return 1; } # ifdef OPENSSL_SYS_UNIX static pthread_once_t fork_once_control = PTHREAD_ONCE_INIT; static void fork_once_func(void) { pthread_atfork(OPENSSL_fork_prepare, OPENSSL_fork_parent, OPENSSL_fork_child); } # endif int openssl_init_fork_handlers(void) { # ifdef OPENSSL_SYS_UNIX if (pthread_once(&fork_once_control, fork_once_func) == 0) return 1; # endif return 0; } int openssl_get_fork_id(void) { return getpid(); } #endif