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Issue 9969098: Set the TZ env to get the UTC-ms since epoch. (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Address comment. Created 8 years, 7 months ago
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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
2 // for details. All rights reserved. Use of this source code is governed by a 2 // for details. All rights reserved. Use of this source code is governed by a
3 // BSD-style license that can be found in the LICENSE file. 3 // BSD-style license that can be found in the LICENSE file.
4 4
5 #include "vm/os.h" 5 #include "vm/os.h"
6 6
7 #include <errno.h> 7 #include <errno.h>
8 #include <limits.h> 8 #include <limits.h>
9 #include <time.h> 9 #include <time.h>
10 #include <sys/resource.h> 10 #include <sys/resource.h>
11 #include <sys/time.h> 11 #include <sys/time.h>
12 #include <sys/types.h> 12 #include <sys/types.h>
13 #include <unistd.h> 13 #include <unistd.h>
14 14
15 #include "platform/utils.h" 15 #include "platform/utils.h"
16 #include "vm/isolate.h" 16 #include "vm/isolate.h"
17 17
18 namespace dart { 18 namespace dart {
19 19
20 bool OS::BreakDownSecondsSinceEpoch(time_t seconds_since_epoch, 20 bool OS::GmTime(int64_t seconds_since_epoch, tm* tm_result) {
21 bool in_utc, 21 time_t seconds = static_cast<time_t>(seconds_since_epoch);
22 BrokenDownDate* result) { 22 if (seconds != seconds_since_epoch) return false;
23 struct tm tm_result; 23 struct tm* error_code = gmtime_r(&seconds, tm_result);
24 struct tm* error_code;
25 if (in_utc) {
26 error_code = gmtime_r(&seconds_since_epoch, &tm_result);
27 } else {
28 // TODO(floitsch): we should be able to call tzset only once during
29 // initialization.
30 tzset(); // Make sure the libc knows about the local zone.
31 error_code = localtime_r(&seconds_since_epoch, &tm_result);
32 }
33 result->year = tm_result.tm_year;
34 result->month= tm_result.tm_mon;
35 result->day = tm_result.tm_mday;
36 result->hours = tm_result.tm_hour;
37 result->minutes = tm_result.tm_min;
38 result->seconds = tm_result.tm_sec;
39 return error_code != NULL; 24 return error_code != NULL;
40 } 25 }
41 26
42 27
43 bool OS::BrokenDownToSecondsSinceEpoch( 28 bool OS::LocalTime(int64_t seconds_since_epoch, tm* tm_result) {
44 const BrokenDownDate& broken_down, bool in_utc, time_t* result) { 29 time_t seconds = static_cast<time_t>(seconds_since_epoch);
45 struct tm tm_broken_down; 30 if (seconds != seconds_since_epoch) return false;
46 // mktime takes the years since 1900. 31 struct tm* error_code = localtime_r(&seconds, tm_result);
47 tm_broken_down.tm_year = broken_down.year; 32 return error_code != NULL;
48 tm_broken_down.tm_mon = broken_down.month; 33 }
49 tm_broken_down.tm_mday = broken_down.day; 34
50 tm_broken_down.tm_hour = broken_down.hours; 35
51 tm_broken_down.tm_min = broken_down.minutes; 36 bool OS::MkGmTime(tm* tm, int64_t* seconds_result) {
52 tm_broken_down.tm_sec = broken_down.seconds;
53 // Set wday to an impossible day, so that we can catch bad input. 37 // Set wday to an impossible day, so that we can catch bad input.
54 tm_broken_down.tm_wday = -1; 38 tm->tm_wday = -1;
55 // Make sure the libc knows about the local zone. 39 time_t seconds = timegm(tm);
56 // In case of 'in_utc' this call is mainly for multi-threading issues. If 40 if ((seconds == -1) && (tm->tm_wday == -1)) {
57 // another thread uses a time-function it will set the timezone. The timezone
58 // adjustement below would then not work anymore.
59 // TODO(floitsch): we should be able to call tzset only once during
60 // initialization.
61 tzset();
62 if (in_utc) {
63 // Disable daylight saving in utc mode.
64 tm_broken_down.tm_isdst = 0;
65 // mktime assumes that the given date is local time zone.
66 *result = mktime(&tm_broken_down);
67 // Remove the timezone.
68 *result -= timezone;
69 } else {
70 // Let libc figure out if daylight saving is active.
71 tm_broken_down.tm_isdst = -1;
72 *result = mktime(&tm_broken_down);
73 }
74 if ((*result == -1) && (tm_broken_down.tm_wday == -1)) {
75 return false; 41 return false;
76 } 42 }
43 *seconds_result = seconds;
77 return true; 44 return true;
78 } 45 }
79 46
47
48 bool OS::MkTime(tm* tm, int64_t* seconds_result) {
49 // Let the libc figure out if daylight saving is active.
50 tm->tm_isdst = -1;
51 // Set wday to an impossible day, so that we can catch bad input.
52 tm->tm_wday = -1;
53 time_t seconds = mktime(tm);
54 if ((seconds == -1) && (tm->tm_wday == -1)) {
55 return false;
56 }
57 *seconds_result = seconds;
58 return true;
59 }
60
80 61
81 int64_t OS::GetCurrentTimeMillis() { 62 int64_t OS::GetCurrentTimeMillis() {
82 return GetCurrentTimeMicros() / 1000; 63 return GetCurrentTimeMicros() / 1000;
83 } 64 }
84 65
85 66
86 int64_t OS::GetCurrentTimeMicros() { 67 int64_t OS::GetCurrentTimeMicros() {
87 // gettimeofday has microsecond resolution. 68 // gettimeofday has microsecond resolution.
88 struct timeval tv; 69 struct timeval tv;
89 if (gettimeofday(&tv, NULL) < 0) { 70 if (gettimeofday(&tv, NULL) < 0) {
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220 void OS::Abort() { 201 void OS::Abort() {
221 abort(); 202 abort();
222 } 203 }
223 204
224 205
225 void OS::Exit(int code) { 206 void OS::Exit(int code) {
226 exit(code); 207 exit(code);
227 } 208 }
228 209
229 } // namespace dart 210 } // namespace dart
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