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/*
* Copyright 2014 Vincent Sanders <vince@netsurf-browser.org>
*
* This file is part of libnsutils.
*
* Licensed under the MIT License,
* http://www.opensource.org/licenses/mit-license.php
*/
/**
* \file
* Time operation implementation
*/
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#if (defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0) && (defined _POSIX_MONOTONIC_CLOCK)) || defined(__OpenBSD__)
#include <time.h>
#elif defined(__riscos)
#include <oslib/os.h>
#elif defined(__MACH__)
#include <mach/mach.h>
#include <mach/clock.h>
#include <mach/mach_time.h>
#elif defined(__amiga)
#ifdef __amigaos4__
#define __USE_INLINE__ 1
#endif
#include <assert.h>
#include <proto/timer.h>
#else
#include <sys/time.h>
#endif
#include "nsutils/time.h"
/* exported interface documented in nsutils/time.h */
nsuerror nsu_getmonotonic_ms(uint64_t *current_out)
{
uint64_t current;
static uint64_t prev = 0; /* previous time so we never go backwards */
#if (defined(_POSIX_TIMERS) && (_POSIX_TIMERS > 0) && (defined _POSIX_MONOTONIC_CLOCK)) || defined(__OpenBSD__)
struct timespec tp;
clock_gettime(CLOCK_MONOTONIC, &tp);
current = (tp.tv_sec * 1000) + (tp.tv_nsec / 1000000);
#elif defined(__riscos)
os_t time;
time = os_read_monotonic_time();
current = time * 10;
#elif defined(__MACH__)
clock_serv_t cclock;
mach_timespec_t mts;
host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &cclock);
clock_get_time(cclock, &mts);
mach_port_deallocate(mach_task_self(), cclock);
current = (mts.tv_sec * 1000) + (mts.tv_nsec / 1000000);
#elif defined(__amiga)
struct EClockVal eclockval;
int freq = 0;
uint64 eclock;
/* NB: The calling task must already have opened timer.device
* and obtained the interface.
*/
assert(TimerBase != NULL);
#ifdef __amigaos4__
assert(ITimer != NULL);
#endif
freq = ReadEClock(&eclockval) / 1000;
eclock = ((uint64)eclockval.ev_hi << 32) | (eclockval.ev_lo);
current = eclock / freq;
#else
#warning "Using dodgy gettimeofday() fallback"
/** \todo Implement this properly! */
struct timeval tv;
gettimeofday(&tv, NULL);
current = (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
#endif
/* ensure time never goes backwards */
if (current > prev) {
*current_out = current;
prev = current;
} else {
/** \todo is 1ms really correct or can we calculate a delta going forwards? */
prev += 1;
*current_out = prev;
}
return NSUERROR_OK;
}
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