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c47b1e2c5b
POSIX leaves the signedness of time_t and clock_t unspecified, but
mainstream implementations (Linux glibc/musl, the BSDs, macOS, RTEMS,
Zephyr's POSIX layer, Windows _time64) expose time_t as signed 64-bit.
NuttX has historically used uint64_t only because it was tied to the
CONFIG_SYSTEM_TIME64 knob; with that gone, switch:
time_t : uint64_t -> int64_t
clock_t : uint64_t -> int64_t
CLOCK_MAX: UINT64_MAX -> INT64_MAX
This lets (time_t)-1 sentinels, negative tick deltas, and host-side
headers behave as on every other POSIX system without source churn.
Headers updated:
- include/sys/types.h, include/limits.h, include/nuttx/clock.h
- include/nuttx/fs/hostfs.h (nuttx_time_t alias)
- include/nuttx/{mqueue.h,wdog.h,wqueue.h,timers/clkcnt.h}
Because clock_t is now signed 64-bit, the NuttX-internal sclock_t
alias becomes redundant: every sclock_t/SCLOCK_MAX use is folded
back to clock_t/CLOCK_MAX (notably in sched/wdog, sched/mqueue,
sched/sched, sched/clock, sched/timer, libs/libc/time, fs/vfs and
the drivers/arch consumers below).
Tick/period constants (NSEC_PER_SEC, USEC_PER_SEC, MSEC_PER_SEC,
SEC_PER_MIN, ...) in include/nuttx/clock.h are retyped from "long"
literals to INT64_C(...) so that 64-bit arithmetic no longer
depends on the host's long width.
Strip now-redundant (time_t)/(clock_t)/(unsigned long) casts and
unsigned-only branches across the tree:
- arch RTC / oneshot / tickless lowerhalfs:
arm: cxd56xx, efm32, imxrt, lc823450, max326xx, sam34, sama5,
samd5e5, samv7, stm32, stm32f7, stm32h7, stm32l4, stm32wb,
xmc4
mips: pic32mz sparc: bm3803 x86_64: intel64
risc-v/xtensa: espressif (esp_i2c[_slave], esp_rtc,
esp32c3{_i2c,_rtc,_wifi_adapter}, esp32{,s2,s3}_*),
mpfs_perf
- drivers: audio/tone, input/aw86225, power/pm/{activity,
stability}_governor, rpmsg/rpmsg_ping,
timers/{ds3231,mcp794xx,pcf85263,rx8010},
wireless/ieee80211/bcm43xxx, wireless/spirit/spirit_spi
- core: fs/vfs/{fs_poll,fs_timerfd}, mm/iob/iob_alloc,
libs/libc/{netdb/lib_dnscache,time/{lib_calendar2utc,
lib_time}}, net/icmp/icmp_pmtu, net/icmpv6/icmpv6_pmtu,
net/ipfrag, net/tcp/{tcp.h,tcp_timer},
net/utils/net_snoop, net/mld/mld_query (drop the now-dead
mld_mrc2mrd helper since signed math handles it directly),
sched/clock/{clock,clock_initialize},
sched/sched/{sched_profil,sched_setparam,sched_setscheduler},
sched/pthread/pthread_create,
sched/wdog/{wd_gettime,wd_start,wdog.h},
sched/timer/timer_gettime, sched/mqueue/*
Flip the few in-tree printf format strings that assumed an
unsigned 64-bit tv_sec:
* drivers/rpmsg/rpmsg_ping.c PRIu64 -> PRId64
* arch/xtensa/src/esp32{,s2,s3}/esp32*_oneshot_lowerhalf.c
PRIu32 (already wrong) -> PRId64
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
99 lines
3.6 KiB
C
99 lines
3.6 KiB
C
/****************************************************************************
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* sched/timer/timer_gettime.c
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <time.h>
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#include <errno.h>
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#include "clock/clock.h"
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#include "timer/timer.h"
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#ifndef CONFIG_DISABLE_POSIX_TIMERS
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: timer_gettime
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*
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* Description:
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* The timer_gettime() function will store the amount of time until the
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* specified timer, timerid, expires and the reload value of the timer
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* into the space pointed to by the value argument. The it_value member
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* of this structure will contain the amount of time before the timer
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* expires, or zero if the timer is disarmed. This value is returned as
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* the interval until timer expiration, even if the timer was armed with
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* absolute time. The it_interval member of value will contain the reload
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* value last set by timer_settime().
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*
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* Input Parameters:
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* timerid - The pre-thread timer, previously created by the call to
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* timer_create(), whose remaining time count will be returned..
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*
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* Returned Value:
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* If the timer_gettime() succeeds, a value of 0 (OK) will be returned.
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* If an error occurs, the value -1 (ERROR) will be returned, and errno
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* set to indicate the error.
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*
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* EINVAL - The timerid argument does not correspond to an ID returned by
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* timer_create() but not yet deleted by timer_delete().
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*
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* Assumptions/Limitations:
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* Due to the asynchronous operation of this function, the time reported
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* by this function could be significantly more than that actual time
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* remaining on the timer at any time.
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*
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****************************************************************************/
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int timer_gettime(timer_t timerid, FAR struct itimerspec *value)
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{
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FAR struct posix_timer_s *timer = timer_gethandle(timerid);
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clock_t ticks;
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int ret = OK;
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if (!timer || !value)
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{
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set_errno(EINVAL);
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ret = ERROR;
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}
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else
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{
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/* Get the number of ticks before the underlying watchdog expires */
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ticks = wd_gettime(&timer->pt_wdog);
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/* Convert that to a struct timespec and return it */
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clock_ticks2time(&value->it_value, ticks);
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clock_ticks2time(&value->it_interval, timer->pt_delay);
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}
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return ret;
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}
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#endif /* CONFIG_DISABLE_POSIX_TIMERS */
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