posix: Add pthread_attr_t methods to get/set affinity.

This patch adds the following methods:

  + pthread_attr_get_affinity_np
  + pthread_attr_set_affinity_np

cpukit/posix/Makefile.am

@@ -142,6 +142,12 @@ libposix_a_SOURCES += src/pthreadatfork.c src/pthreadattrdestroy.c \
 ## RTEMS specific support methods
 libposix_a_SOURCES += src/pthreadattrcompare.c 
 
+if HAS_SMP
+## PTHREAD_AFFINITY_C_FILES 
+libposix_a_SOURCES += src/pthreadattrsetaffinitynp.c \
+    src/pthreadattrgetaffinitynp.c
+endif
+
 ## PSIGNAL_C_FILES
 libposix_a_SOURCES += src/psignal.c src/alarm.c src/kill.c src/killinfo.c \
     src/kill_r.c src/pause.c src/psignalclearprocesssignals.c \

cpukit/posix/src/pthreadattrgetaffinitynp.c

@@ -0,0 +1,48 @@
+/**
+ * @file
+ *
+ * @brief Pthread Attribute Get Affinity
+ * @ingroup POSIXAPI
+ */
+
+/*
+ *  COPYRIGHT (c) 2014.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#if HAVE_DECL_PTHREAD_ATTR_GETAFFINITY_NP
+
+#define  _GNU_SOURCE
+#include <pthread.h>
+#include <errno.h>
+
+#include <rtems/posix/pthreadimpl.h>
+#include <rtems/posix/priorityimpl.h>
+#include <rtems/score/threadimpl.h>
+
+int pthread_attr_getaffinity_np(
+  const pthread_attr_t *attr,
+  size_t                cpusetsize,
+  cpu_set_t            *cpuset
+)
+{
+  if ( !cpuset )
+    return EFAULT;
+  if ( !attr )
+    return EFAULT;
+
+  if ( cpusetsize != attr->affinitysetsize)
+    return EINVAL;
+
+  CPU_COPY( cpuset, attr->affinityset );
+  return 0;
+}
+#endif

cpukit/posix/src/pthreadattrsetaffinitynp.c

@@ -0,0 +1,54 @@
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+/**
+ * @file
+ *
+ * @brief Pthread Attribute Set Affinity
+ * @ingroup POSIXAPI
+ */
+
+/*
+ *  COPYRIGHT (c) 2014.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ */
+
+#if HAVE_DECL_PTHREAD_ATTR_SETAFFINITY_NP
+
+#define  _GNU_SOURCE
+#include <pthread.h>
+#include <errno.h>
+
+#include <rtems/posix/pthreadimpl.h>
+#include <rtems/posix/priorityimpl.h>
+#include <rtems/score/threadimpl.h>
+#include <rtems/score/cpusetimpl.h>
+
+int pthread_attr_setaffinity_np(
+  pthread_attr_t    *attr,
+  size_t             cpusetsize,
+  const cpu_set_t   *cpuset
+)
+{
+  int error;
+
+  if ( !cpuset )
+    return EFAULT;
+  if ( !attr )
+    return EFAULT;
+
+  error = _CPU_set_Is_valid( cpuset, cpusetsize );
+  if ( error != 0 )
+    return EINVAL;
+ 
+  CPU_COPY( attr->affinityset, cpuset );
+
+  return 0;
+}
+
+#endif