score: Add processor mask to/from cpu_set_t

Update #3059.

1 files changed, 75 insertions, 0 deletions

diff --git a/cpukit/score/src/processormaskcopy.c b/cpukit/score/src/processormaskcopy.c
new file mode 100644
index 0000000000..bf8082d3c4
--- /dev/null
+++ b/cpukit/score/src/processormaskcopy.c
@@ -0,0 +1,75 @@
+/**
+ * @file
+ *
+ * @brief Processor Mask Implementation
+ *
+ * @ingroup ScoreProcessorMask
+ */
+
+/*
+ * Copyright (c) 2017 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * 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
+
+#include <rtems/score/processormask.h>
+
+Processor_mask_Copy_status _Processor_mask_Copy(
+  long       *dst,
+  size_t      dst_size,
+  const long *src,
+  size_t      src_size
+)
+{
+  long inclusive = 0;
+  long exclusive = 0;
+
+  if ( ( dst_size | src_size ) % sizeof( long ) != 0 ) {
+    return PROCESSOR_MASK_COPY_INVALID_SIZE;
+  }
+
+  while ( dst_size > 0 && src_size > 0 ) {
+    long bits = *src;
+
+    inclusive |= bits;
+    *dst = bits;
+    ++dst;
+    ++src;
+    dst_size -= sizeof( long );
+    src_size -= sizeof( long );
+  }
+
+  while ( dst_size > 0 ) {
+    *dst = 0;
+    ++dst;
+    dst_size -= sizeof( long );
+  }
+
+  while ( src_size > 0 ) {
+    exclusive |= *src;
+    ++src;
+    src_size -= sizeof( long );
+  }
+
+  if ( exclusive != 0 ) {
+    if ( inclusive != 0 ) {
+      return PROCESSOR_MASK_COPY_PARTIAL_LOSS;
+    } else {
+      return PROCESSOR_MASK_COPY_COMPLETE_LOSS;
+    }
+  }
+
+  return PROCESSOR_MASK_COPY_LOSSLESS;
+}