94 lines
2.6 KiB
C
94 lines
2.6 KiB
C
/*
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Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef NDBMEMCACHE_TIMING_H
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#define NDBMEMCACHE_TIMING_H
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#include "ndbmemcache_global.h"
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#include "ndbmemcache_config.h"
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#include <sys/time.h>
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#include <pthread.h>
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#if defined(HAVE_MACH_MACH_TIME_H)
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#include <mach/mach_time.h>
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typedef Uint64 time_point_t;
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#elif defined(HAVE_GETHRTIME)
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typedef hrtime_t time_point_t;
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#elif defined(HAVE_CLOCK_GETTIME)
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#include <time.h>
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typedef Uint64 time_point_t;
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#else
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typedef int time_point_t;
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#endif
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#ifdef CLOCK_MONOTONIC
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#define PREFERRED_CLOCK CLOCK_MONOTONIC
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#else
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#define PREFERRED_CLOCK CLOCK_REALTIME
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#endif
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/* On platforms without gethrvtime(), define get_thread_time() to 0. */
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#ifdef HAVE_GETHRVTIME
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#define get_thread_vtime() gethrvtime()
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#else
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#define get_thread_vtime() 0
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#endif
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DECLARE_FUNCTIONS_WITH_C_LINKAGE
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/**
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*
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* @param point a context value maintained between calls to timing_point().
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*
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* @return the number of elapsed nanoseconds since the previous timing point.
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* On the first call to timing_point() in a sequence, you must disregard the
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* return value.
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*/
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Uint64 timing_point(time_point_t *point);
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/**
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* Initialize a condition variable for use with timeouts
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*/
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void init_condition_var(pthread_cond_t *c);
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/**
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* Fetch the current time into timespec t in a way that can be used to set
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* wait timeout on a POSIX condition variable
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*/
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int timespec_get_time(struct timespec *t);
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/**
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* Add some number of milliseconds to timespec t
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*/
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void timespec_add_msec(struct timespec *t, unsigned msec);
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END_FUNCTIONS_WITH_C_LINKAGE
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#endif
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