Embedded GPLv2 license in pthreads

1 files changed, 148 insertions, 102 deletions

diff --git a/components/pthreads/pthread_cond.c b/components/pthreads/pthread_cond.c
index 4f9dba9cd5..e5342dd775 100644
--- a/components/pthreads/pthread_cond.c
+++ b/components/pthreads/pthread_cond.c
@@ -1,193 +1,239 @@
+/*
+ * File      : pthread_cond.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>
 #include "pthread_internal.h"
 
 int pthread_condattr_destroy(pthread_condattr_t *attr)
 {
-	if (!attr) return EINVAL;
+    if (!attr)
+        return EINVAL;
 
-	return 0;
+    return 0;
 }
 RTM_EXPORT(pthread_condattr_destroy);
 
 int pthread_condattr_init(pthread_condattr_t *attr)
 {
-	if (!attr) return EINVAL;
-	*attr = PTHREAD_PROCESS_PRIVATE;
+    if (!attr)
+        return EINVAL;
+    *attr = PTHREAD_PROCESS_PRIVATE;
 
-	return 0;
+    return 0;
 }
 RTM_EXPORT(pthread_condattr_init);
 
 int pthread_condattr_getclock(const pthread_condattr_t *attr,
-       clockid_t *clock_id)
+                              clockid_t                *clock_id)
 {
-	return 0;
+    return 0;
 }
 RTM_EXPORT(pthread_condattr_getclock);
 
 int pthread_condattr_setclock(pthread_condattr_t *attr,
-       clockid_t clock_id)
+                              clockid_t           clock_id)
 {
-	return 0;
+    return 0;
 }
 RTM_EXPORT(pthread_condattr_setclock);
 
 int pthread_condattr_getpshared(const pthread_condattr_t *attr, int *pshared)
 {
-	if (!attr || !pshared) return EINVAL;
+    if (!attr || !pshared)
+        return EINVAL;
+
+    *pshared = PTHREAD_PROCESS_PRIVATE;
 
-	*pshared = PTHREAD_PROCESS_PRIVATE;
-	return 0;
+    return 0;
 }
 RTM_EXPORT(pthread_condattr_getpshared);
 
 int pthread_condattr_setpshared(pthread_condattr_t*attr, int pshared)
 {
-	if ((pshared != PTHREAD_PROCESS_PRIVATE) && (pshared != PTHREAD_PROCESS_SHARED))
-    	return EINVAL;
+    if ((pshared != PTHREAD_PROCESS_PRIVATE) &&
+        (pshared != PTHREAD_PROCESS_SHARED))
+    {
+        return EINVAL;
+    }
 
-	if (pshared != PTHREAD_PROCESS_PRIVATE)
-    	return ENOSYS;
+    if (pshared != PTHREAD_PROCESS_PRIVATE)
+        return ENOSYS;
 
-	return 0;
+    return 0;
 }
 RTM_EXPORT(pthread_condattr_setpshared);
 
 int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr)
 {
-	rt_err_t result;
-	char cond_name[RT_NAME_MAX];
-	static rt_uint16_t cond_num = 0;
+    rt_err_t result;
+    char cond_name[RT_NAME_MAX];
+    static rt_uint16_t cond_num = 0;
 
-	/* parameter check */
-	if (cond == RT_NULL) return EINVAL;
-	if ((attr != RT_NULL) && (*attr != PTHREAD_PROCESS_PRIVATE)) return EINVAL;
+    /* parameter check */
+    if (cond == RT_NULL)
+        return EINVAL;
+    if ((attr != RT_NULL) && (*attr != PTHREAD_PROCESS_PRIVATE))
+        return EINVAL;
 
-	rt_snprintf(cond_name, sizeof(cond_name),
-			"cond%02d", cond_num++);
+    rt_snprintf(cond_name, sizeof(cond_name), "cond%02d", cond_num++);
 
-	cond->attr = *attr;
-	result = rt_sem_init(&cond->sem, cond_name, 0, RT_IPC_FLAG_FIFO);
-	if (result != RT_EOK) return EINVAL;
+    cond->attr = *attr;
+    result = rt_sem_init(&cond->sem, cond_name, 0, RT_IPC_FLAG_FIFO);
+    if (result != RT_EOK)
+        return EINVAL;
 
-	/* detach the object from system object container */
-	rt_object_detach(&(cond->sem.parent.parent));
+    /* detach the object from system object container */
+    rt_object_detach(&(cond->sem.parent.parent));
 
-	return 0;
+    return 0;
 }
 RTM_EXPORT(pthread_cond_init);
 
 int pthread_cond_destroy(pthread_cond_t *cond)
 {
-	rt_err_t result;
-	if (cond == RT_NULL) return EINVAL;
-	if (cond->attr == -1) return 0; /* which is not initialized */
+    rt_err_t result;
+    if (cond == RT_NULL)
+        return EINVAL;
+    if (cond->attr == -1)
+        return 0; /* which is not initialized */
 
-	result = rt_sem_trytake(&(cond->sem));
-	if (result != RT_EOK) return EBUSY;
+    result = rt_sem_trytake(&(cond->sem));
+    if (result != RT_EOK)
+        return EBUSY;
 
-	/* clean condition */
-	rt_memset(cond, 0, sizeof(pthread_cond_t));
-	cond->attr = -1;
+    /* clean condition */
+    rt_memset(cond, 0, sizeof(pthread_cond_t));
+    cond->attr = -1;
 
-	return 0;
+    return 0;
 }
 RTM_EXPORT(pthread_cond_destroy);
 
 int pthread_cond_broadcast(pthread_cond_t *cond)
 {
-	rt_err_t result;
-	if (cond->attr == -1)
-		pthread_cond_init(cond, RT_NULL);
+    rt_err_t result;
+    if (cond->attr == -1)
+        pthread_cond_init(cond, RT_NULL);
 
-	rt_enter_critical();
-	while (1)
-	{
-		/* try to take condition semaphore */
-		result = rt_sem_trytake(&(cond->sem));
-		if (result == -RT_ETIMEOUT)
-		{
-			/* it's timeout, release this semaphore */
-			rt_sem_release(&(cond->sem));
-		}
-		else if (result == RT_EOK)
-		{
-			/* has taken this semaphore, release it */
-			rt_sem_release(&(cond->sem));
-			break;
-		}
-		else
-		{
-			rt_exit_critical();
-			return EINVAL;
-		}
-	}
-	rt_exit_critical();
+    rt_enter_critical();
+    while (1)
+    {
+        /* try to take condition semaphore */
+        result = rt_sem_trytake(&(cond->sem));
+        if (result == -RT_ETIMEOUT)
+        {
+            /* it's timeout, release this semaphore */
+            rt_sem_release(&(cond->sem));
+        }
+        else if (result == RT_EOK)
+        {
+            /* has taken this semaphore, release it */
+            rt_sem_release(&(cond->sem));
+            break;
+        }
+        else
+        {
+            rt_exit_critical();
 
-	return 0;
+            return EINVAL;
+        }
+    }
+    rt_exit_critical();
+
+    return 0;
 }
 RTM_EXPORT(pthread_cond_broadcast);
 
 int pthread_cond_signal(pthread_cond_t *cond)
 {
-	rt_err_t result;
+    rt_err_t result;
 
-	if (cond->attr == -1)
-		pthread_cond_init(cond, RT_NULL);
+    if (cond->attr == -1)
+        pthread_cond_init(cond, RT_NULL);
 
-	result = rt_sem_release(&(cond->sem));
-	if (result == RT_EOK) return 0;
+    result = rt_sem_release(&(cond->sem));
+    if (result == RT_EOK)
+        return 0;
 
-	return 0;
+    return 0;
 }
 RTM_EXPORT(pthread_cond_signal);
 
-rt_err_t _pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex,
-		rt_int32_t timeout)
+rt_err_t _pthread_cond_timedwait(pthread_cond_t  *cond,
+                                 pthread_mutex_t *mutex,
+                                 rt_int32_t       timeout)
 {
-	rt_err_t result;
+    rt_err_t result;
+
+    if (!cond || !mutex)
+        return -RT_ERROR;
+    /* check whether initialized */
+    if (cond->attr == -1)
+        pthread_cond_init(cond, RT_NULL);
 
-	if (!cond || !mutex) return -RT_ERROR;
-	/* check whether initialized */
-	if (cond->attr == -1) pthread_cond_init(cond, RT_NULL);
+    /* The mutex was not owned by the current thread at the time of the call. */
+    if (mutex->lock.owner != pthread_self())
+        return -RT_ERROR;
+    /* unlock a mutex failed */
+    if (pthread_mutex_unlock(mutex) != 0)
+        return -RT_ERROR;
 
-	/* The mutex was not owned by the current thread at the time of the call. */
-	if (mutex->lock.owner != pthread_self()) return -RT_ERROR;
-	/* unlock a mutex failed */
-	if (pthread_mutex_unlock(mutex) != 0)
-		return -RT_ERROR;
+    result = rt_sem_take(&(cond->sem), timeout);
+    /* lock mutex again */
+    pthread_mutex_lock(mutex);
 
-	result = rt_sem_take(&(cond->sem), timeout);
-	/* lock mutex again */
-	pthread_mutex_lock(mutex);
-	return result;
+    return result;
 }
 RTM_EXPORT(_pthread_cond_timedwait);
 
 int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex)
 {
-	rt_err_t result;
+    rt_err_t result;
 
-	result = _pthread_cond_timedwait(cond, mutex, RT_WAITING_FOREVER);
-	if (result == RT_EOK) return 0;
+    result = _pthread_cond_timedwait(cond, mutex, RT_WAITING_FOREVER);
+    if (result == RT_EOK)
+        return 0;
 
-	return EINVAL;
+    return EINVAL;
 }
 RTM_EXPORT(pthread_cond_wait);
 
-int pthread_cond_timedwait(pthread_cond_t *cond,
-	pthread_mutex_t * mutex,
-	const struct timespec *abstime)
+int pthread_cond_timedwait(pthread_cond_t        *cond,
+                           pthread_mutex_t       *mutex,
+                           const struct timespec *abstime)
 {
-	int timeout;
-	rt_err_t result;
+    int timeout;
+    rt_err_t result;
 
-	timeout = clock_time_to_tick(abstime);
-	result = _pthread_cond_timedwait(cond, mutex, timeout);
-	if (result == RT_EOK) return 0;
-	if (result == -RT_ETIMEOUT) return ETIMEDOUT;
+    timeout = clock_time_to_tick(abstime);
+    result = _pthread_cond_timedwait(cond, mutex, timeout);
+    if (result == RT_EOK)
+        return 0;
+    if (result == -RT_ETIMEOUT)
+        return ETIMEDOUT;
 
-	return EINVAL;
+    return EINVAL;
 }
 RTM_EXPORT(pthread_cond_timedwait);