Resync new repository with old repo r5166

git-svn-id: http://svn.code.sf.net/p/nuttx/code/trunk@5153 42af7a65-404d-4744-a932-0658087f49c3
2026-10-30 01:43:35 +08:00 · 2012-09-17 18:18:44 +00:00
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+/****************************************************************************
+ * lib/pthread/pthread_attrinit.c
+ *
+ *   Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <pthread.h>
+#include <string.h>
+#include <debug.h>
+#include <errno.h>
+
+#include <nuttx/pthread.h>
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Global Variables
+ ****************************************************************************/
+
+/* Default pthread attributes (see included/nuttx/pthread.h).  When configured
+ * to build separate kernel- and user-address spaces, this global is
+ * duplicated in each address spaced.  This copy can only be shared within
+ * the user address space. 
+ */
+
+#if defined(CONFIG_NUTTX_KERNEL) && !defined(__KERNEL__)
+pthread_attr_t g_default_pthread_attr = PTHREAD_ATTR_INITIALIZER;
+#endif
+
+/****************************************************************************
+ * Private Variables
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  pthread_attr_init
+ *
+ * Description:
+ *   Initializes a thread attributes object (attr) with
+ *   default values for all of the individual attributes
+ *   used by a given implementation.
+ *
+ * Parameters:
+ *   attr
+ *
+ * Return Value:
+ *   0 on success, otherwise an error number
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_attr_init(FAR pthread_attr_t *attr)
+{
+  int ret = OK;
+
+  sdbg("attr=0x%p\n", attr);
+  if (!attr)
+    {
+      ret = ENOMEM;
+    }
+  else
+    {
+      /* Set the child thread priority to be the default
+       * priority. Set the child stack size to some arbitrary
+       * default value.
+       */
+
+      memcpy(attr, &g_default_pthread_attr, sizeof(pthread_attr_t));
+    }
+
+  sdbg("Returning %d\n", ret);
+  return ret;
+}
+