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/*
* Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (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 <internal/thread_arch.h>
#if defined(OPENSSL_THREADS_POSIX)
# define _GNU_SOURCE
# include <errno.h>
# include <sys/types.h>
# include <unistd.h>
static void *thread_start_thunk(void *vthread)
{
CRYPTO_THREAD *thread;
CRYPTO_THREAD_RETVAL ret;
thread = (CRYPTO_THREAD *)vthread;
ret = thread->routine(thread->data);
ossl_crypto_mutex_lock(thread->statelock);
CRYPTO_THREAD_SET_STATE(thread, CRYPTO_THREAD_FINISHED);
thread->retval = ret;
ossl_crypto_condvar_broadcast(thread->condvar);
ossl_crypto_mutex_unlock(thread->statelock);
return NULL;
}
int ossl_crypto_thread_native_spawn(CRYPTO_THREAD *thread)
{
int ret;
pthread_attr_t attr;
pthread_t *handle;
handle = OPENSSL_zalloc(sizeof(*handle));
if (handle == NULL)
goto fail;
pthread_attr_init(&attr);
if (!thread->joinable)
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
ret = pthread_create(handle, &attr, thread_start_thunk, thread);
pthread_attr_destroy(&attr);
if (ret != 0)
goto fail;
thread->handle = handle;
return 1;
fail:
thread->handle = NULL;
OPENSSL_free(handle);
return 0;
}
int ossl_crypto_thread_native_perform_join(CRYPTO_THREAD *thread, CRYPTO_THREAD_RETVAL *retval)
{
void *thread_retval;
pthread_t *handle;
if (thread == NULL || thread->handle == NULL)
return 0;
handle = (pthread_t *) thread->handle;
if (pthread_join(*handle, &thread_retval) != 0)
return 0;
/*
* Join return value may be non-NULL when the thread has been cancelled,
* as indicated by thread_retval set to PTHREAD_CANCELLED.
*/
if (thread_retval != NULL)
return 0;
return 1;
}
int ossl_crypto_thread_native_exit(void)
{
pthread_exit(NULL);
return 1;
}
int ossl_crypto_thread_native_is_self(CRYPTO_THREAD *thread)
{
return pthread_equal(*(pthread_t *)thread->handle, pthread_self());
}
CRYPTO_MUTEX *ossl_crypto_mutex_new(void)
{
pthread_mutex_t *mutex;
if ((mutex = OPENSSL_zalloc(sizeof(*mutex))) == NULL)
return NULL;
if (pthread_mutex_init(mutex, NULL) != 0) {
OPENSSL_free(mutex);
return NULL;
}
return (CRYPTO_MUTEX *)mutex;
}
int ossl_crypto_mutex_try_lock(CRYPTO_MUTEX *mutex)
{
pthread_mutex_t *mutex_p;
mutex_p = (pthread_mutex_t *)mutex;
if (pthread_mutex_trylock(mutex_p) == EBUSY)
return 0;
return 1;
}
void ossl_crypto_mutex_lock(CRYPTO_MUTEX *mutex)
{
pthread_mutex_t *mutex_p;
mutex_p = (pthread_mutex_t *)mutex;
pthread_mutex_lock(mutex_p);
}
void ossl_crypto_mutex_unlock(CRYPTO_MUTEX *mutex)
{
pthread_mutex_t *mutex_p;
mutex_p = (pthread_mutex_t *)mutex;
pthread_mutex_unlock(mutex_p);
}
void ossl_crypto_mutex_free(CRYPTO_MUTEX **mutex)
{
pthread_mutex_t **mutex_p;
if (mutex == NULL)
return;
mutex_p = (pthread_mutex_t **)mutex;
if (*mutex_p != NULL)
pthread_mutex_destroy(*mutex_p);
OPENSSL_free(*mutex_p);
*mutex = NULL;
}
CRYPTO_CONDVAR *ossl_crypto_condvar_new(void)
{
pthread_cond_t *cv_p;
if ((cv_p = OPENSSL_zalloc(sizeof(*cv_p))) == NULL)
return NULL;
if (pthread_cond_init(cv_p, NULL) != 0) {
OPENSSL_free(cv_p);
return NULL;
}
return (CRYPTO_CONDVAR *) cv_p;
}
void ossl_crypto_condvar_wait(CRYPTO_CONDVAR *cv, CRYPTO_MUTEX *mutex)
{
pthread_cond_t *cv_p;
pthread_mutex_t *mutex_p;
cv_p = (pthread_cond_t *)cv;
mutex_p = (pthread_mutex_t *)mutex;
pthread_cond_wait(cv_p, mutex_p);
}
void ossl_crypto_condvar_broadcast(CRYPTO_CONDVAR *cv)
{
pthread_cond_t *cv_p;
cv_p = (pthread_cond_t *)cv;
pthread_cond_broadcast(cv_p);
}
void ossl_crypto_condvar_free(CRYPTO_CONDVAR **cv)
{
pthread_cond_t **cv_p;
if (cv == NULL)
return;
cv_p = (pthread_cond_t **)cv;
if (*cv_p != NULL)
pthread_cond_destroy(*cv_p);
OPENSSL_free(*cv_p);
*cv_p = NULL;
}
#endif
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