Yonggang Luo
b4bc23078a
Notable changes: - Remove the comments in port impl, that's easily getting to in-consistence - Sync the jerryscript-port.h and 05.PORT-API.md - Fixes the invalid comment in port codes JerryScript-DCO-1.0-Signed-off-by: Yonggang Luo luoyonggang@gmail.com
84 lines
2.2 KiB
C++
84 lines
2.2 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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#include <stdio.h>
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#include <stdlib.h>
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#include "jerryscript-port.h"
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#include "mbed.h"
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void
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jerry_port_fatal (jerry_fatal_code_t code)
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{
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exit ((int) code);
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} /* jerry_port_fatal */
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void
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jerry_port_log (const char *message_p)
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{
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while (*message_p != '\0')
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{
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if (*message_p == '\n')
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{
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/* add CR for proper display in serial monitors */
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fputc ('\r', stderr);
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}
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fputc (*message_p++, stderr);
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}
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} /* jerry_port_log */
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int32_t
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jerry_port_local_tza (double unix_ms)
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{
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(void) unix_ms;
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return 0;
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} /* jerry_port_local_tza */
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double
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jerry_port_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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{
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skew = 0;
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}
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else if (last_tick > curr_tick)
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{
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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_current_time */
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