1 files changed, 124 insertions, 0 deletions
diff --git a/src/lib/common/rand.h b/src/lib/common/rand.h
new file mode 100644
index 0000000..369b8fd
--- /dev/null
+++ b/src/lib/common/rand.h
@@ -0,0 +1,124 @@
+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/lib/common/rand.h $                                       */
+/*                                                                        */
+/* OpenPOWER OnChipController Project                                     */
+/*                                                                        */
+/* Contributors Listed Below - COPYRIGHT 2015                             */
+/* [+] International Business Machines Corp.                              */
+/*                                                                        */
+/*                                                                        */
+/* Licensed 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.                         */
+/*                                                                        */
+/* IBM_PROLOG_END_TAG                                                     */
+#ifndef __RAND_H__
+#define __RAND_H__
+
+// $Id$
+
+/// \file rand.h
+/// \brief Random number generation
+
+#include <stdint.h>
+
+// Error/Panic codes
+
+#define RAND64_UNIMPLEMENTED 0x00726301
+
+
+/// RAND32_ALL is used as the \a limit argument to rand32() and _rand32() to
+/// request the return of a full 32-bit random unsigned integer.
+
+#define RAND32_ALL 0
+
+extern uint32_t _seed32;
+
+uint32_t 
+_rand32(uint32_t *seed, uint32_t limit);
+
+uint32_t
+rand32(uint32_t limit);
+
+void
+srand32(uint32_t seed);
+
+
+/// RAND64_ALL is used as the \a limit argument to rand64() and _rand64() to
+/// request the return of a full 64-bit random unsigned integer.
+
+#define RAND64_ALL 0
+
+extern uint64_t _seed64;
+
+//void
+//davidmult64to128(uint64_t u, uint64_t v, uint64_t &h, uint64_t &l);
+
+uint64_t 
+_rand64(uint64_t *seed, uint64_t limit);
+
+uint64_t
+rand64(uint64_t limit);
+
+void
+srand64(uint64_t seed);
+
+
+/// A random weighting map for integer selections
+///
+/// See rand_map_int() for details.
+
+typedef struct {
+
+    /// The relative weight of this selection
+    ///
+    /// The final weight of the map array \e must be 0 to terminate the map.
+    unsigned weight;
+
+    /// The selection
+    int selection;
+
+} RandMapInt;
+
+
+/// A random weighting map for pointer selections
+///
+/// See rand_map_ptr() for details.
+
+typedef struct {
+
+    /// The relative weight of this selection
+    ///
+    /// The final weight of the map array \e must be 0 to terminate the map.
+    unsigned weight;
+
+    /// The selection
+    void *selection;
+
+} RandMapPtr;
+
+
+int
+_rand_map_int(uint32_t *seed, RandMapInt *map, int *index);
+
+int
+rand_map_int(RandMapInt *map);
+
+void *
+_rand_map_ptr(uint32_t *seed, RandMapPtr *map, int *index);
+
+void *
+rand_map_ptr(RandMapPtr *map);
+
+
+#endif	/* __RAND_H__ */