pthread: add pthread_attr_{get|set}guardsize support

This commit adds simple implementation of guardsize for pthreads.
At this moment this option simply increases the size of allocated pthread stack.

At default pthread guard size is set to 0.

Signed-off-by: p-szafonimateusz <p-szafonimateusz@xiaomi.com>

libs/libc/pthread/CMakeLists.txt

@@ -51,6 +51,8 @@ if(NOT CONFIG_DISABLE_PTHREAD)
     pthread_attr_getschedparam.c
     pthread_attr_setscope.c
     pthread_attr_getscope.c
+    pthread_attr_setguardsize.c
+    pthread_attr_getguardsize.c
     pthread_barrierattr_init.c
     pthread_barrierattr_destroy.c
     pthread_barrierattr_getpshared.c

libs/libc/pthread/Make.defs

@@ -38,6 +38,7 @@ CSRCS += pthread_attr_setstacksize.c pthread_attr_getstacksize.c
 CSRCS += pthread_attr_setstack.c pthread_attr_getstack.c
 CSRCS += pthread_attr_setschedparam.c pthread_attr_getschedparam.c
 CSRCS += pthread_attr_setscope.c pthread_attr_getscope.c
+CSRCS += pthread_attr_setguardsize.c pthread_attr_getguardsize.c
 CSRCS += pthread_barrierattr_init.c pthread_barrierattr_destroy.c
 CSRCS += pthread_barrierattr_getpshared.c pthread_barrierattr_setpshared.c
 CSRCS += pthread_barrierinit.c pthread_barrierdestroy.c pthread_barrierwait.c

libs/libc/pthread/pthread_attr_getguardsize.c

@@ -0,0 +1,67 @@
+/****************************************************************************
+ * libs/libc/pthread/pthread_attr_getguardsize.c
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <pthread.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: pthread_attr_getguardsize
+ *
+ * Description:
+ *   The pthread_attr_getstack() function shall get the thread guardsize
+ *   attributes from the attr object.
+ *
+ * Input Parameters:
+ *   attr      - thread attributes to be queried.
+ *   guardsize - guard size pointer
+ *
+ * Returned Value:
+ *   0 if successful.  Otherwise, an error code.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_attr_getguardsize(FAR const pthread_attr_t *attr,
+                              FAR size_t *guardsize)
+{
+  int ret;
+
+  if (!guardsize)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      *guardsize = attr->guardsize;
+      ret = OK;
+    }
+
+  return ret;
+}

libs/libc/pthread/pthread_attr_setguardsize.c

@@ -0,0 +1,66 @@
+/****************************************************************************
+ * libs/libc/pthread/pthread_attr_setguardsize.c
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <pthread.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: pthread_attr_setguardsize
+ *
+ * Description:
+ *   The pthread_attr_setstack() function shall set the thread guardsize
+ *   attribute in the attr object.
+ *
+ * Parameters:
+ *   attr      - thread attributes to be modified.
+ *   guardsize - guard size
+ *
+ * Return Value:
+ *   0 if successful.  Otherwise, an error code.
+ *
+ * Assumptions:
+ *
+ ****************************************************************************/
+
+int pthread_attr_setguardsize(FAR pthread_attr_t *attr, size_t guardsize)
+{
+  int ret;
+
+  if (!attr)
+    {
+      ret = EINVAL;
+    }
+  else
+    {
+      attr->guardsize = guardsize;
+      ret = OK;
+    }
+
+  return ret;
+}