Embedded GPLv2 license in pthreads

1 files changed, 142 insertions, 97 deletions

diff --git a/components/pthreads/pthread_mutex.c b/components/pthreads/pthread_mutex.c
index 34ff91e451..40fd870e81 100644
--- a/components/pthreads/pthread_mutex.c
+++ b/components/pthreads/pthread_mutex.c
@@ -1,3 +1,27 @@
+/*
+ * File      : pthread_mutex.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 <rtthread.h>
 #include "pthread.h"
 
@@ -8,51 +32,54 @@ const pthread_mutexattr_t pthread_default_mutexattr = PTHREAD_PROCESS_PRIVATE;
 
 int pthread_mutexattr_init(pthread_mutexattr_t *attr)
 {
-	if (attr)
-	{
-		*attr = pthread_default_mutexattr;
-		return 0;
-	}
+    if (attr)
+    {
+        *attr = pthread_default_mutexattr;
+
+        return 0;
+    }
 
-	return EINVAL;
+    return EINVAL;
 }
 RTM_EXPORT(pthread_mutexattr_init);
 
 int pthread_mutexattr_destroy(pthread_mutexattr_t *attr)
 {
-	if (attr)
-	{
-	 	*attr = -1;
-		return 0;
-	}
+    if (attr)
+    {
+        *attr = -1;
 
-	return EINVAL;
+        return 0;
+    }
+
+    return EINVAL;
 }
 RTM_EXPORT(pthread_mutexattr_destroy);
 
 int pthread_mutexattr_gettype(const pthread_mutexattr_t *attr, int *type)
 {
-	if (attr && type)
-	{
+    if (attr && type)
+    {
         int  atype = (*attr & MUTEXATTR_TYPE_MASK);
 
-		if (atype >= PTHREAD_MUTEX_NORMAL && atype <= PTHREAD_MUTEX_ERRORCHECK)
-		{
-			*type = atype;
-			return 0;
-		}
-	}
+        if (atype >= PTHREAD_MUTEX_NORMAL && atype <= PTHREAD_MUTEX_ERRORCHECK)
+        {
+            *type = atype;
+
+            return 0;
+        }
+    }
 
-	return EINVAL;
+    return EINVAL;
 }
 RTM_EXPORT(pthread_mutexattr_gettype);
 
 int pthread_mutexattr_settype(pthread_mutexattr_t *attr, int type)
 {
-    if (attr && type >= PTHREAD_MUTEX_NORMAL &&
-                type <= PTHREAD_MUTEX_ERRORCHECK )
-	{
+    if (attr && type >= PTHREAD_MUTEX_NORMAL && type <= PTHREAD_MUTEX_ERRORCHECK)
+    {
         *attr = (*attr & ~MUTEXATTR_TYPE_MASK) | type;
+
         return 0;
     }
 
@@ -60,12 +87,13 @@ int pthread_mutexattr_settype(pthread_mutexattr_t *attr, int type)
 }
 RTM_EXPORT(pthread_mutexattr_settype);
 
-int pthread_mutexattr_setpshared(pthread_mutexattr_t *attr, int  pshared)
+int pthread_mutexattr_setpshared(pthread_mutexattr_t *attr, int pshared)
 {
-    if (!attr) return EINVAL;
+    if (!attr)
+        return EINVAL;
 
     switch (pshared)
-	{
+    {
     case PTHREAD_PROCESS_PRIVATE:
         *attr &= ~MUTEXATTR_SHARED_MASK;
         return 0;
@@ -81,7 +109,8 @@ RTM_EXPORT(pthread_mutexattr_setpshared);
 
 int pthread_mutexattr_getpshared(pthread_mutexattr_t *attr, int *pshared)
 {
-    if (!attr || !pshared) return EINVAL;
+    if (!attr || !pshared)
+        return EINVAL;
 
     *pshared = (*attr & MUTEXATTR_SHARED_MASK) ? PTHREAD_PROCESS_SHARED
                                                : PTHREAD_PROCESS_PRIVATE;
@@ -91,116 +120,132 @@ RTM_EXPORT(pthread_mutexattr_getpshared);
 
 int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
 {
-	rt_err_t result;
-	char name[RT_NAME_MAX];
-	static rt_uint16_t pthread_mutex_number = 0;
+    rt_err_t result;
+    char name[RT_NAME_MAX];
+    static rt_uint16_t pthread_mutex_number = 0;
 
-	if (!mutex) return EINVAL;
+    if (!mutex)
+        return EINVAL;
 
-	/* build mutex name */
-	rt_snprintf(name, sizeof(name), "pmtx%02d", pthread_mutex_number ++);
-	if (attr == RT_NULL) mutex->attr = pthread_default_mutexattr;
-	else mutex->attr = *attr;
+    /* build mutex name */
+    rt_snprintf(name, sizeof(name), "pmtx%02d", pthread_mutex_number ++);
+    if (attr == RT_NULL)
+        mutex->attr = pthread_default_mutexattr;
+    else
+        mutex->attr = *attr;
 
-	/* init mutex lock */
-	result = rt_mutex_init(&(mutex->lock), name, RT_IPC_FLAG_FIFO);
-	if (result != RT_EOK) return EINVAL;
+    /* init mutex lock */
+    result = rt_mutex_init(&(mutex->lock), name, RT_IPC_FLAG_FIFO);
+    if (result != RT_EOK)
+        return EINVAL;
 
-	/* detach the object from system object container */
-	rt_object_detach(&(mutex->lock.parent.parent));
+    /* detach the object from system object container */
+    rt_object_detach(&(mutex->lock.parent.parent));
 
-	return 0;
+    return 0;
 }
 RTM_EXPORT(pthread_mutex_init);
 
 int pthread_mutex_destroy(pthread_mutex_t *mutex)
 {
-	if (!mutex || mutex->attr == -1) return EINVAL;
+    if (!mutex || mutex->attr == -1)
+        return EINVAL;
 
-	/* it's busy */
-	if (mutex->lock.owner != RT_NULL) return EBUSY;
+    /* it's busy */
+    if (mutex->lock.owner != RT_NULL)
+        return EBUSY;
 
-	rt_memset(mutex, 0, sizeof(pthread_mutex_t));
-	mutex->attr = -1;
+    rt_memset(mutex, 0, sizeof(pthread_mutex_t));
+    mutex->attr = -1;
 
-	return 0;
+    return 0;
 }
 RTM_EXPORT(pthread_mutex_destroy);
 
 int pthread_mutex_lock(pthread_mutex_t *mutex)
 {
-	int mtype;
-	rt_err_t result;
+    int mtype;
+    rt_err_t result;
 
-	if (!mutex) return EINVAL;
+    if (!mutex)
+        return EINVAL;
 
-	if (mutex->attr == -1)
-	{
-		/* init mutex */
-		pthread_mutex_init(mutex, RT_NULL);
-	}
+    if (mutex->attr == -1)
+    {
+        /* init mutex */
+        pthread_mutex_init(mutex, RT_NULL);
+    }
 
-	mtype = mutex->attr & MUTEXATTR_TYPE_MASK;
-	rt_enter_critical();
-	if (mutex->lock.owner == rt_thread_self() && mtype != PTHREAD_MUTEX_RECURSIVE)
-	{
-		rt_exit_critical();
-		return EDEADLK;
-	}
-	rt_exit_critical();
+    mtype = mutex->attr & MUTEXATTR_TYPE_MASK;
+    rt_enter_critical();
+    if (mutex->lock.owner == rt_thread_self() &&
+        mtype != PTHREAD_MUTEX_RECURSIVE)
+    {
+        rt_exit_critical();
 
-	result = rt_mutex_take(&(mutex->lock), RT_WAITING_FOREVER);
-	if (result == RT_EOK) return 0;
+        return EDEADLK;
+    }
+    rt_exit_critical();
 
-	return EINVAL;
+    result = rt_mutex_take(&(mutex->lock), RT_WAITING_FOREVER);
+    if (result == RT_EOK)
+        return 0;
+
+    return EINVAL;
 }
 RTM_EXPORT(pthread_mutex_lock);
 
 int pthread_mutex_unlock(pthread_mutex_t *mutex)
 {
-	rt_err_t result;
+    rt_err_t result;
 
-	if (!mutex) return EINVAL;
-	if (mutex->attr == -1)
-	{
-		/* init mutex */
-		pthread_mutex_init(mutex, RT_NULL);
-	}
+    if (!mutex)
+        return EINVAL;
+    if (mutex->attr == -1)
+    {
+        /* init mutex */
+        pthread_mutex_init(mutex, RT_NULL);
+    }
 
-	if (mutex->lock.owner != rt_thread_self())
-	{
-		int mtype;
-		mtype = mutex->attr & MUTEXATTR_TYPE_MASK;
+    if (mutex->lock.owner != rt_thread_self())
+    {
+        int mtype;
+        mtype = mutex->attr & MUTEXATTR_TYPE_MASK;
 
-		/* error check, return EPERM */
-		if (mtype == PTHREAD_MUTEX_ERRORCHECK) return EPERM;
+        /* error check, return EPERM */
+        if (mtype == PTHREAD_MUTEX_ERRORCHECK)
+            return EPERM;
 
-		/* no thread waiting on this mutex */
-		if (mutex->lock.owner == RT_NULL) return 0;
-	}
+        /* no thread waiting on this mutex */
+        if (mutex->lock.owner == RT_NULL)
+            return 0;
+    }
 
-	result = rt_mutex_release(&(mutex->lock));
-	if (result == RT_EOK) return 0;
-	
-	return EINVAL;
+    result = rt_mutex_release(&(mutex->lock));
+    if (result == RT_EOK)
+        return 0;
+    
+    return EINVAL;
 }
 RTM_EXPORT(pthread_mutex_unlock);
 
 int pthread_mutex_trylock(pthread_mutex_t *mutex)
 {
-	rt_err_t result;
+    rt_err_t result;
 
-	if (!mutex) return EINVAL;
-	if (mutex->attr == -1)
-	{
-		/* init mutex */
-		pthread_mutex_init(mutex, RT_NULL);
-	}
+    if (!mutex)
+        return EINVAL;
+    if (mutex->attr == -1)
+    {
+        /* init mutex */
+        pthread_mutex_init(mutex, RT_NULL);
+    }
 
-	result = rt_mutex_take(&(mutex->lock), 0);
-	if (result == RT_EOK) return 0;
+    result = rt_mutex_take(&(mutex->lock), 0);
+    if (result == RT_EOK)
+        return 0;
 
-	return EBUSY;
+    return EBUSY;
 }
 RTM_EXPORT(pthread_mutex_trylock);