1285307Sed/*- 2285307Sed * Copyright (c) 2015 Nuxi, https://nuxi.nl/ 3285307Sed * 4285307Sed * Redistribution and use in source and binary forms, with or without 5285307Sed * modification, are permitted provided that the following conditions 6285307Sed * are met: 7285307Sed * 1. Redistributions of source code must retain the above copyright 8285307Sed * notice, this list of conditions and the following disclaimer. 9285307Sed * 2. Redistributions in binary form must reproduce the above copyright 10285307Sed * notice, this list of conditions and the following disclaimer in the 11285307Sed * documentation and/or other materials provided with the distribution. 12285307Sed * 13285307Sed * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14285307Sed * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15285307Sed * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16285307Sed * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17285307Sed * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18285307Sed * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19285307Sed * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20285307Sed * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21285307Sed * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22285307Sed * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23285307Sed * SUCH DAMAGE. 24285307Sed */ 25285307Sed 26285307Sed#include <sys/cdefs.h> 27285307Sed__FBSDID("$FreeBSD: releng/11.0/sys/compat/cloudabi/cloudabi_clock.c 297247 2016-03-24 21:47:15Z ed $"); 28285307Sed 29285754Sed#include <sys/param.h> 30285754Sed#include <sys/proc.h> 31285754Sed#include <sys/stdint.h> 32285754Sed#include <sys/syscallsubr.h> 33285754Sed 34297247Sed#include <contrib/cloudabi/cloudabi_types_common.h> 35297247Sed 36285307Sed#include <compat/cloudabi/cloudabi_proto.h> 37285754Sed#include <compat/cloudabi/cloudabi_util.h> 38285307Sed 39285754Sed/* Converts a CloudABI clock ID to a FreeBSD clock ID. */ 40285754Sedstatic int 41285754Sedcloudabi_convert_clockid(cloudabi_clockid_t in, clockid_t *out) 42285754Sed{ 43285754Sed switch (in) { 44285754Sed case CLOUDABI_CLOCK_MONOTONIC: 45285754Sed *out = CLOCK_MONOTONIC; 46285754Sed return (0); 47285754Sed case CLOUDABI_CLOCK_PROCESS_CPUTIME_ID: 48285754Sed *out = CLOCK_PROCESS_CPUTIME_ID; 49285754Sed return (0); 50285754Sed case CLOUDABI_CLOCK_REALTIME: 51285754Sed *out = CLOCK_REALTIME; 52285754Sed return (0); 53285754Sed case CLOUDABI_CLOCK_THREAD_CPUTIME_ID: 54285754Sed *out = CLOCK_THREAD_CPUTIME_ID; 55285754Sed return (0); 56285754Sed default: 57285754Sed return (EINVAL); 58285754Sed } 59285754Sed} 60285754Sed 61285754Sed/* Converts a struct timespec to a CloudABI timestamp. */ 62285307Sedint 63285754Sedcloudabi_convert_timespec(const struct timespec *in, cloudabi_timestamp_t *out) 64285754Sed{ 65285754Sed cloudabi_timestamp_t s, ns; 66285754Sed 67285754Sed if (in->tv_sec < 0) { 68285754Sed /* Timestamps from before the Epoch cannot be expressed. */ 69285754Sed *out = 0; 70285754Sed return (EOVERFLOW); 71285754Sed } 72285754Sed s = in->tv_sec; 73285754Sed ns = in->tv_nsec; 74285754Sed if (s > UINT64_MAX / 1000000000 || 75285754Sed (s == UINT64_MAX / 1000000000 && ns > UINT64_MAX % 1000000000)) { 76285754Sed /* Addition of seconds and nanoseconds would overflow. */ 77285754Sed *out = UINT64_MAX; 78285754Sed return (EOVERFLOW); 79285754Sed } 80285754Sed *out = s * 1000000000 + ns; 81285754Sed return (0); 82285754Sed} 83285754Sed 84285908Sed/* Fetches the time value of a clock. */ 85285754Sedint 86285908Sedcloudabi_clock_time_get(struct thread *td, cloudabi_clockid_t clock_id, 87285908Sed cloudabi_timestamp_t *ret) 88285307Sed{ 89285754Sed struct timespec ts; 90285754Sed int error; 91285754Sed clockid_t clockid; 92285307Sed 93285908Sed error = cloudabi_convert_clockid(clock_id, &clockid); 94285754Sed if (error != 0) 95285754Sed return (error); 96285908Sed error = kern_clock_gettime(td, clockid, &ts); 97285754Sed if (error != 0) 98285754Sed return (error); 99285908Sed return (cloudabi_convert_timespec(&ts, ret)); 100285307Sed} 101285307Sed 102285307Sedint 103285908Sedcloudabi_sys_clock_res_get(struct thread *td, 104285908Sed struct cloudabi_sys_clock_res_get_args *uap) 105285307Sed{ 106285754Sed struct timespec ts; 107285754Sed cloudabi_timestamp_t cts; 108285754Sed int error; 109285754Sed clockid_t clockid; 110285307Sed 111285754Sed error = cloudabi_convert_clockid(uap->clock_id, &clockid); 112285754Sed if (error != 0) 113285754Sed return (error); 114285908Sed error = kern_clock_getres(td, clockid, &ts); 115285754Sed if (error != 0) 116285754Sed return (error); 117285754Sed error = cloudabi_convert_timespec(&ts, &cts); 118285754Sed if (error != 0) 119285754Sed return (error); 120285754Sed td->td_retval[0] = cts; 121285754Sed return (0); 122285307Sed} 123285908Sed 124285908Sedint 125285908Sedcloudabi_sys_clock_time_get(struct thread *td, 126285908Sed struct cloudabi_sys_clock_time_get_args *uap) 127285908Sed{ 128285908Sed cloudabi_timestamp_t ts; 129285908Sed int error; 130285908Sed 131285908Sed error = cloudabi_clock_time_get(td, uap->clock_id, &ts); 132285908Sed td->td_retval[0] = ts; 133285908Sed return (error); 134285908Sed} 135