Embedded GPLv2 license in pthreads

1 files changed, 54 insertions, 22 deletions

diff --git a/components/pthreads/pthread_spin.c b/components/pthreads/pthread_spin.c
index 27bb0c5762..4c4320dda9 100644
--- a/components/pthreads/pthread_spin.c
+++ b/components/pthreads/pthread_spin.c
@@ -1,51 +1,83 @@
+/*
+ * File      : pthread_spin.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2010, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * 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;
+    if (!lock)
+        return EINVAL;
+
+    lock->lock = 0;
 
-	lock->lock = 0;
-	return 0;
+    return 0;
 }
 
 int pthread_spin_destroy (pthread_spinlock_t *lock)
 {
-	if (!lock) return EINVAL;
+    if (!lock)
+        return EINVAL;
 
-	return 0;
+    return 0;
 }
 
 int pthread_spin_lock (pthread_spinlock_t *lock)
 {
-	if (!lock) return EINVAL;
+    if (!lock)
+        return EINVAL;
 
-	while (!(lock->lock))
-	{
-		lock->lock = 1;
-	}
+    while (!(lock->lock))
+    {
+        lock->lock = 1;
+    }
 
-	return 0;
+    return 0;
 }
 
 int pthread_spin_trylock (pthread_spinlock_t *lock)
 {
-	if (!lock) return EINVAL;
+    if (!lock)
+        return EINVAL;
+
+    if (!(lock->lock))
+    {
+        lock->lock = 1;
 
-	if (!(lock->lock))
-	{
-		lock->lock = 1;
-		return 0;
-	}
+        return 0;
+    }
 
-	return EBUSY;
+    return EBUSY;
 }
 
 int pthread_spin_unlock (pthread_spinlock_t *lock)
 {
-	if (!lock) return EINVAL;
-	if (!(lock->lock)) return EPERM;
+    if (!lock)
+        return EINVAL;
+    if (!(lock->lock))
+        return EPERM;
 
-	lock->lock = 0;
+    lock->lock = 0;
 
-	return 0;
+    return 0;
 }