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/*-
* Copyright (c) 2015 Nuxi, https://nuxi.nl/
*
* 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 AUTHOR 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 AUTHOR 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/stdint.h>
#include <sys/syscallsubr.h>
#include <contrib/cloudabi/cloudabi_types_common.h>
#include <compat/cloudabi/cloudabi_proto.h>
#include <compat/cloudabi/cloudabi_util.h>
/* Converts a CloudABI clock ID to a FreeBSD clock ID. */
static int
cloudabi_convert_clockid(cloudabi_clockid_t in, clockid_t *out)
{
switch (in) {
case CLOUDABI_CLOCK_MONOTONIC:
*out = CLOCK_MONOTONIC;
return (0);
case CLOUDABI_CLOCK_PROCESS_CPUTIME_ID:
*out = CLOCK_PROCESS_CPUTIME_ID;
return (0);
case CLOUDABI_CLOCK_REALTIME:
*out = CLOCK_REALTIME;
return (0);
case CLOUDABI_CLOCK_THREAD_CPUTIME_ID:
*out = CLOCK_THREAD_CPUTIME_ID;
return (0);
default:
return (EINVAL);
}
}
/* Converts a struct timespec to a CloudABI timestamp. */
int
cloudabi_convert_timespec(const struct timespec *in, cloudabi_timestamp_t *out)
{
cloudabi_timestamp_t s, ns;
if (in->tv_sec < 0) {
/* Timestamps from before the Epoch cannot be expressed. */
*out = 0;
return (EOVERFLOW);
}
s = in->tv_sec;
ns = in->tv_nsec;
if (s > UINT64_MAX / 1000000000 ||
(s == UINT64_MAX / 1000000000 && ns > UINT64_MAX % 1000000000)) {
/* Addition of seconds and nanoseconds would overflow. */
*out = UINT64_MAX;
return (EOVERFLOW);
}
*out = s * 1000000000 + ns;
return (0);
}
/* Fetches the time value of a clock. */
int
cloudabi_clock_time_get(struct thread *td, cloudabi_clockid_t clock_id,
cloudabi_timestamp_t *ret)
{
struct timespec ts;
int error;
clockid_t clockid;
error = cloudabi_convert_clockid(clock_id, &clockid);
if (error != 0)
return (error);
error = kern_clock_gettime(td, clockid, &ts);
if (error != 0)
return (error);
return (cloudabi_convert_timespec(&ts, ret));
}
int
cloudabi_sys_clock_res_get(struct thread *td,
struct cloudabi_sys_clock_res_get_args *uap)
{
struct timespec ts;
cloudabi_timestamp_t cts;
int error;
clockid_t clockid;
error = cloudabi_convert_clockid(uap->clock_id, &clockid);
if (error != 0)
return (error);
error = kern_clock_getres(td, clockid, &ts);
if (error != 0)
return (error);
error = cloudabi_convert_timespec(&ts, &cts);
if (error != 0)
return (error);
memcpy(td->td_retval, &cts, sizeof(cts));
return (0);
}
int
cloudabi_sys_clock_time_get(struct thread *td,
struct cloudabi_sys_clock_time_get_args *uap)
{
cloudabi_timestamp_t ts;
int error;
error = cloudabi_clock_time_get(td, uap->clock_id, &ts);
memcpy(td->td_retval, &ts, sizeof(ts));
return (error);
}
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