70 lines
1.1 KiB
C
Executable File
70 lines
1.1 KiB
C
Executable File
/*
|
|
* Copyright (c) 2006-2021, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2010-10-26 Bernard the first version
|
|
*/
|
|
|
|
#include <pthread.h>
|
|
|
|
int pthread_spin_init (pthread_spinlock_t *lock, int pshared)
|
|
{
|
|
if (!lock)
|
|
return EINVAL;
|
|
|
|
lock->lock = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int pthread_spin_destroy (pthread_spinlock_t *lock)
|
|
{
|
|
if (!lock)
|
|
return EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int pthread_spin_lock (pthread_spinlock_t *lock)
|
|
{
|
|
if (!lock)
|
|
return EINVAL;
|
|
|
|
while (!(lock->lock))
|
|
{
|
|
lock->lock = 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int pthread_spin_trylock (pthread_spinlock_t *lock)
|
|
{
|
|
if (!lock)
|
|
return EINVAL;
|
|
|
|
if (!(lock->lock))
|
|
{
|
|
lock->lock = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
return EBUSY;
|
|
}
|
|
|
|
int pthread_spin_unlock (pthread_spinlock_t *lock)
|
|
{
|
|
if (!lock)
|
|
return EINVAL;
|
|
if (!(lock->lock))
|
|
return EPERM;
|
|
|
|
lock->lock = 0;
|
|
|
|
return 0;
|
|
}
|