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https://github.com/jerryscript-project/jerryscript.git
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3afc4b0b85
The previous jerry_port interface did not allow timezones to be handled correctly, even if the host system was up to the task. This PR changes the jerry_port interface to allow a completely correct implementation to exist, and provides one (for Linux/BSD systems) in default-date.c. Fixes #1661 JerryScript-DCO-1.0-Signed-off-by: crazy2be crazy1be@gmail.com
93 lines
2.8 KiB
C
93 lines
2.8 KiB
C
/* Copyright JS Foundation and other contributors, http://js.foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define _BSD_SOURCE
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#include <stdarg.h>
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#include <stdlib.h>
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#include <sys/time.h>
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#include "jerry-core/include/jerryscript-port.h"
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#include "us_ticker_api.h"
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#ifndef JSMBED_OVERRIDE_JERRY_PORT_LOG
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/**
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* Provide log message implementation for the engine.
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*/
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void
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jerry_port_log (jerry_log_level_t level, /**< log level */
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const char *format, /**< format string */
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...) /**< parameters */
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{
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(void) level; /* ignore log level */
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va_list args;
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va_start (args, format);
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vfprintf (stderr, format, args);
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va_end (args);
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if (strlen (format) == 1 && format[0] == 0x0a) /* line feed (\n) */
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{
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printf ("\r"); /* add CR for proper display in serial monitors */
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}
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} /* jerry_port_log */
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#endif /* JSMBED_OVERRIDE_JERRY_PORT_LOG */
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/**
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* Implementation of jerry_port_get_local_time_zone_adjustment.
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*
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* @return 0, as we live in UTC.
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*/
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double
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jerry_port_get_local_time_zone_adjustment (double unix_ms, bool is_utc)
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{
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return 0;
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} /* jerry_port_get_local_time_zone_adjustment */
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/**
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* Implementation of jerry_port_get_current_time.
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*
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* @return current timer's counter value in milliseconds
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*/
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double
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jerry_port_get_current_time (void)
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{
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static uint64_t last_tick = 0;
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static time_t last_time = 0;
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static uint32_t skew = 0;
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uint64_t curr_tick = us_ticker_read (); /* The value is in microseconds. */
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time_t curr_time = time(NULL); /* The value is in seconds. */
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double result = curr_time * 1000;
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/* The us_ticker_read () has an overflow for each UINT_MAX microseconds
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* (~71 mins). For each overflow event the ticker-based clock is about 33
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* milliseconds fast. Without a timer thread the milliseconds part of the
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* time can be corrected if the difference of two get_current_time calls
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* are within the mentioned 71 mins. Above that interval we can assume
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* that the milliseconds part of the time is negligibe.
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*/
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if (curr_time - last_time > (time_t)(((uint32_t)-1) / 1000000)) {
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skew = 0;
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} else if (last_tick > curr_tick) {
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skew = (skew + 33) % 1000;
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}
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result += (curr_tick / 1000 - skew) % 1000;
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last_tick = curr_tick;
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last_time = curr_time;
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return result;
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} /* jerry_port_get_current_time */
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