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+/*
+ * librd - Rapid Development C library
+ *
+ * Copyright (c) 2012, Magnus Edenhill
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * 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.
+ */
+
+#ifndef _RDTYPES_H_
+#define _RDTYPES_H_
+
+#include <inttypes.h>
+
+
+/*
+ * Fundamental types
+ */
+
+
+/* Timestamp (microseconds).
+ * Struct members with this type usually have the "ts_" prefix for
+ * the internal monotonic clock timestamp, or "wts_" for wall clock timestamp.
+ */
+typedef int64_t rd_ts_t;
+
+#define RD_TS_MAX INT64_MAX
+
+
+typedef uint8_t rd_bool_t;
+#define rd_true 1
+#define rd_false 0
+
+
+/**
+ * @enum Denotes an async or sync operation
+ */
+typedef enum {
+ RD_SYNC = 0, /**< Synchronous/blocking */
+ RD_ASYNC, /**< Asynchronous/non-blocking */
+} rd_async_t;
+
+
+/**
+ * @enum Instruct function to acquire or not to acquire a lock
+ */
+typedef enum {
+ RD_DONT_LOCK = 0, /**< Do not acquire lock */
+ RD_DO_LOCK = 1, /**< Do acquire lock */
+} rd_dolock_t;
+
+
+/*
+ * Helpers
+ */
+
+/**
+ * @brief Overflow-safe type-agnostic compare for use in cmp functions.
+ *
+ * @warning A and B may be evaluated multiple times.
+ *
+ * @returns -1, 0 or 1.
+ */
+#define RD_CMP(A, B) (int)((A) < (B) ? -1 : ((A) > (B)))
+
+
+#endif /* _RDTYPES_H_ */