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authorJesse Morgan <jesse@jesterpm.net>2016-12-17 21:28:53 -0800
committerJesse Morgan <jesse@jesterpm.net>2016-12-17 21:28:53 -0800
commit54df2afaa61c6a03cbb4a33c9b90fa572b6d07b8 (patch)
tree18147b92b969d25ffbe61935fb63035cac820dd0 /db-4.8.30/dbinc/clock.h
Berkeley DB 4.8 with rust build script for linux.
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+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 2005-2009 Oracle. All rights reserved.
+ *
+ * $Id$
+ */
+/*
+ * Copyright (c) 1982, 1986, 1993
+ * The Regents of the University of California. 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.
+ * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+ *
+ * @(#)time.h 8.5 (Berkeley) 5/4/95
+ * FreeBSD: src/sys/sys/time.h,v 1.65 2004/04/07 04:19:49 imp Exp
+ */
+
+#ifndef _DB_CLOCK_H_
+#define _DB_CLOCK_H_
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+/*
+ * This declaration is POSIX-compatible. Because there are lots of different
+ * time.h include file patterns out there, it's easier to declare our own name
+ * in all cases than to try and discover if a system has a struct timespec.
+ * For the same reason, and because we'd have to #include <sys/time.h> in db.h,
+ * we don't export any timespec structures in the DB API, even in places where
+ * it would make sense, like the replication statistics information.
+ */
+typedef struct {
+ time_t tv_sec; /* seconds */
+ long tv_nsec; /* nanoseconds */
+} db_timespec;
+
+/* Operations on timespecs */
+#undef timespecclear
+#define timespecclear(tvp) ((tvp)->tv_sec = (tvp)->tv_nsec = 0)
+#undef timespecisset
+#define timespecisset(tvp) ((tvp)->tv_sec || (tvp)->tv_nsec)
+#undef timespeccmp
+#define timespeccmp(tvp, uvp, cmp) \
+ (((tvp)->tv_sec == (uvp)->tv_sec) ? \
+ ((tvp)->tv_nsec cmp (uvp)->tv_nsec) : \
+ ((tvp)->tv_sec cmp (uvp)->tv_sec))
+#undef timespecadd
+/*
+ * Note that using timespecadd to add to yourself (i.e. doubling)
+ * must be supported.
+ */
+#define timespecadd(vvp, uvp) \
+ do { \
+ (vvp)->tv_sec += (uvp)->tv_sec; \
+ (vvp)->tv_nsec += (uvp)->tv_nsec; \
+ if ((vvp)->tv_nsec >= 1000000000) { \
+ (vvp)->tv_sec++; \
+ (vvp)->tv_nsec -= 1000000000; \
+ } \
+ } while (0)
+#undef timespecsub
+#define timespecsub(vvp, uvp) \
+ do { \
+ (vvp)->tv_sec -= (uvp)->tv_sec; \
+ (vvp)->tv_nsec -= (uvp)->tv_nsec; \
+ if ((vvp)->tv_nsec < 0) { \
+ (vvp)->tv_sec--; \
+ (vvp)->tv_nsec += 1000000000; \
+ } \
+ } while (0)
+
+#undef timespecset
+#define timespecset(vvp, sec, nsec) \
+ do { \
+ (vvp)->tv_sec = (time_t)(sec); \
+ (vvp)->tv_nsec = (long)(nsec); \
+ } while (0)
+
+#define DB_TIMEOUT_TO_TIMESPEC(t, vvp) \
+ do { \
+ (vvp)->tv_sec = (time_t)((t) / 1000000); \
+ (vvp)->tv_nsec = (long)(((t) % 1000000) * 1000); \
+ } while (0)
+
+#define DB_TIMESPEC_TO_TIMEOUT(t, vvp, prec) \
+ do { \
+ t = (u_long)((vvp)->tv_sec * 1000000); \
+ t += (u_long)((vvp)->tv_nsec / 1000); \
+ /* Add in 1 usec for lost nsec precision if wanted. */ \
+ if (prec) \
+ t++; \
+ } while (0)
+
+#define TIMESPEC_ADD_DB_TIMEOUT(vvp, t) \
+ do { \
+ db_timespec __tmp; \
+ DB_TIMEOUT_TO_TIMESPEC(t, &__tmp); \
+ timespecadd((vvp), &__tmp); \
+ } while (0)
+
+#if defined(__cplusplus)
+}
+#endif
+#endif /* !_DB_CLOCK_H_ */