1 files changed, 89 insertions, 0 deletions
diff --git a/src/spdk/include/spdk/util.h b/src/spdk/include/spdk/util.h
new file mode 100644
index 00000000..43d3b8d5
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+++ b/src/spdk/include/spdk/util.h
@@ -0,0 +1,89 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) Intel Corporation.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * 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.
+ *     * Neither the name of Intel Corporation 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.
+ */
+
+/** \file
+ * General utility functions
+ */
+
+#ifndef SPDK_UTIL_H
+#define SPDK_UTIL_H
+
+#include "spdk/stdinc.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define spdk_min(a,b) (((a)<(b))?(a):(b))
+#define spdk_max(a,b) (((a)>(b))?(a):(b))
+
+#define SPDK_COUNTOF(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+#define SPDK_CONTAINEROF(ptr, type, member) ((type *)((uintptr_t)ptr - offsetof(type, member)))
+
+#define SPDK_SEC_TO_USEC 1000000ULL
+
+static inline uint32_t
+spdk_u32log2(uint32_t x)
+{
+	if (x == 0) {
+		/* log(0) is undefined */
+		return 0;
+	}
+	return 31u - __builtin_clz(x);
+}
+
+static inline uint32_t
+spdk_align32pow2(uint32_t x)
+{
+	return 1u << (1 + spdk_u32log2(x - 1));
+}
+
+/**
+ * Check if a uint32_t is a power of 2.
+ */
+static inline bool
+spdk_u32_is_pow2(uint32_t x)
+{
+	if (x == 0) {
+		return false;
+	}
+
+	return (x & (x - 1)) == 0;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif