mirror of
https://github.com/intel/linux-sgx
synced 2026-06-08 14:49:32 +00:00
Zhang Lili Z
117 lines
3.2 KiB
C++
117 lines
3.2 KiB
C++
/* $OpenBSD: rthread_cond.c,v 1.5 2019/01/29 17:40:26 mpi Exp $ */
|
|
/*
|
|
* Copyright (c) 2017 Martin Pieuchot <mpi@openbsd.org>
|
|
* Copyright (c) 2012 Philip Guenther <guenther@openbsd.org>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include "sgx_trts.h"
|
|
#include "sgx_spinlock.h"
|
|
#include "pthread_imp.h"
|
|
#include "util.h"
|
|
|
|
static volatile uint32_t static_init_lock = SGX_SPINLOCK_INITIALIZER;
|
|
|
|
int pthread_mutex_init(pthread_mutex_t *mutexp, const pthread_mutexattr_t *attr)
|
|
{
|
|
pthread_mutex_t mutex;
|
|
UNUSED(attr);
|
|
mutex = (pthread_mutex_t)calloc(1, sizeof(*mutex));
|
|
if (mutex == NULL)
|
|
return (ENOMEM);
|
|
sgx_thread_mutex_init(mutex, NULL);
|
|
*mutexp = mutex;
|
|
return 0;
|
|
}
|
|
|
|
int pthread_mutex_destroy(pthread_mutex_t *mutexp)
|
|
{
|
|
if (mutexp == NULL)
|
|
return (EINVAL);
|
|
|
|
sgx_thread_mutex_t *mutex = *mutexp;
|
|
if(mutex) {
|
|
int ret = sgx_thread_mutex_destroy(mutex);
|
|
if(ret != 0)
|
|
return ret;
|
|
|
|
free((void *)(mutex));
|
|
*mutexp = NULL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int pthread_mutex_lock(pthread_mutex_t *mutexp)
|
|
{
|
|
if (mutexp == NULL)
|
|
return (EINVAL);
|
|
int error=0;
|
|
|
|
/*
|
|
* If the mutex is statically initialized, perform the dynamic
|
|
* initialization. Note: _thread_mutex_lock() in libc requires
|
|
* pthread_mutex_lock() to perform the mutex init when *mutexp
|
|
* is NULL.
|
|
*/
|
|
if (*mutexp == NULL) {
|
|
sgx_spin_lock(&static_init_lock);
|
|
if (*mutexp == NULL)
|
|
error = pthread_mutex_init(mutexp, NULL);
|
|
sgx_spin_unlock(&static_init_lock);
|
|
if (error != 0)
|
|
return (EINVAL);
|
|
}
|
|
|
|
return sgx_thread_mutex_lock(*mutexp);
|
|
}
|
|
|
|
int pthread_mutex_trylock(pthread_mutex_t *mutexp)
|
|
{
|
|
if (mutexp == NULL)
|
|
return (EINVAL);
|
|
int error=0;
|
|
|
|
/*
|
|
* If the mutex is statically initialized, perform the dynamic
|
|
* initialization. Note: _thread_mutex_lock() in libc requires
|
|
* pthread_mutex_lock() to perform the mutex init when *mutexp
|
|
* is NULL.
|
|
*/
|
|
if (*mutexp == NULL) {
|
|
sgx_spin_lock(&static_init_lock);
|
|
if (*mutexp == NULL)
|
|
error = pthread_mutex_init(mutexp, NULL);
|
|
sgx_spin_unlock(&static_init_lock);
|
|
if (error != 0)
|
|
return (EINVAL);
|
|
}
|
|
|
|
return sgx_thread_mutex_trylock(*mutexp);
|
|
}
|
|
|
|
int pthread_mutex_unlock(pthread_mutex_t *mutexp)
|
|
{
|
|
if (mutexp == NULL)
|
|
return (EINVAL);
|
|
|
|
if (*mutexp == NULL)
|
|
abort();
|
|
|
|
return sgx_thread_mutex_unlock(*mutexp);
|
|
}
|
|
|