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authorDaniel Wilhelm <daniel@wili.li>2014-04-18 17:02:17 +0200
committerDaniel Wilhelm <daniel@wili.li>2014-04-18 17:02:17 +0200
commitb9203ee84953006547f4afd58f405874c87bf0dc (patch)
tree9e41f1533f120e9268e86658c52458630ffd718a /shared/ossp_uuid/uuid_time.c
parent3.0 (diff)
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3.1
Diffstat (limited to 'shared/ossp_uuid/uuid_time.c')
-rw-r--r--shared/ossp_uuid/uuid_time.c117
1 files changed, 117 insertions, 0 deletions
diff --git a/shared/ossp_uuid/uuid_time.c b/shared/ossp_uuid/uuid_time.c
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+/*
+** OSSP uuid - Universally Unique Identifier
+** Copyright (c) 2004-2008 Ralf S. Engelschall <rse@engelschall.com>
+** Copyright (c) 2004-2008 The OSSP Project <http://www.ossp.org/>
+**
+** This file is part of OSSP uuid, a library for the generation
+** of UUIDs which can found at http://www.ossp.org/pkg/lib/uuid/
+**
+** Permission to use, copy, modify, and distribute this software for
+** any purpose with or without fee is hereby granted, provided that
+** the above copyright notice and this permission notice appear in all
+** copies.
+**
+** THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 AUTHORS AND COPYRIGHT HOLDERS AND THEIR
+** 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.
+**
+** uuid_time.c: Time Management
+*/
+
+/* own headers (part (1/2) */
+#include "uuid_ac.h"
+
+/* system headers */
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+
+/* own headers (part (1/2) */
+#include "uuid_time.h"
+
+/* POSIX gettimeofday(2) abstraction (without timezone) */
+int time_gettimeofday(struct timeval *tv)
+{
+#if defined(HAVE_GETTIMEOFDAY)
+ /* Unix/POSIX pass-through */
+ return gettimeofday(tv, NULL);
+#elif defined(HAVE_CLOCK_GETTIME)
+ /* POSIX emulation */
+ struct timespec ts;
+ if (clock_gettime(CLOCK_MONOTONIC, &ts) == -1)
+ return -1;
+ if (tv != NULL) {
+ tv->tv_sec = (long)ts.tv_sec;
+ tv->tv_usec = (long)ts.tv_nsec / 1000;
+ }
+ return 0;
+#elif defined(WIN32)
+ /* Windows emulation */
+ FILETIME ft;
+ LARGE_INTEGER li;
+ __int64 t;
+ static int tzflag;
+#if !defined(__GNUC__)
+#define EPOCHFILETIME 116444736000000000i64
+#else
+#define EPOCHFILETIME 116444736000000000LL
+#endif
+ if (tv != NULL) {
+ GetSystemTimeAsFileTime(&ft);
+ li.LowPart = ft.dwLowDateTime;
+ li.HighPart = ft.dwHighDateTime;
+ t = li.QuadPart;
+ t -= EPOCHFILETIME;
+ t /= 10;
+ tv->tv_sec = (long)(t / 1000000);
+ tv->tv_usec = (long)(t % 1000000);
+ }
+ return 0;
+#else
+#error neither Win32 GetSystemTimeAsFileTime() nor Unix gettimeofday() nor POSIX clock_gettime() available!
+#endif
+}
+
+/* BSD usleep(3) abstraction */
+int time_usleep(long usec)
+{
+#if defined(WIN32) && defined(HAVE_SLEEP)
+ /* Win32 newer Sleep(3) variant */
+ Sleep(usec / 1000);
+#elif defined(WIN32)
+ /* Win32 older _sleep(3) variant */
+ _sleep(usec / 1000);
+#elif defined(HAVE_NANOSLEEP)
+ /* POSIX newer nanosleep(3) variant */
+ struct timespec ts;
+ ts.tv_sec = 0;
+ ts.tv_nsec = 1000 * usec;
+ nanosleep(&ts, NULL);
+#else
+ /* POSIX older select(2) variant */
+ struct timeval tv;
+ tv.tv_sec = 0;
+ tv.tv_usec = usec;
+ select(0, NULL, NULL, NULL, &tv);
+#endif
+ return 0;
+}
+
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