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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, 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 #ifndef VM_OS_H_ | 5 #ifndef VM_OS_H_ |
6 #define VM_OS_H_ | 6 #define VM_OS_H_ |
7 | 7 |
8 #include "vm/globals.h" | 8 #include "vm/globals.h" |
9 | 9 |
10 // Forward declarations. | 10 // Forward declarations. |
11 class tm; | 11 class tm; |
12 | 12 |
13 namespace dart { | 13 namespace dart { |
14 | 14 |
15 // Forward declarations. | 15 // Forward declarations. |
16 class Isolate; | 16 class Isolate; |
17 | 17 |
18 // Interface to the underlying OS platform. | 18 // Interface to the underlying OS platform. |
19 class OS { | 19 class OS { |
20 public: | 20 public: |
| 21 // Takes the seconds since epoch (midnight, January 1, 1970 UTC) and breaks it |
| 22 // down into date and time in the UTC timezone. |
| 23 // The returned year is offset by 1900. The returned month is 0-based. |
| 24 // Returns true if the conversion succeeds, false otherwise. |
| 25 static bool GmTime(int64_t seconds_since_epoch, tm* tm_result); |
| 26 |
| 27 // Takes the seconds since epoch (midnight, January 1, 1970 UTC) and breaks it |
| 28 // down into date and time in the local time. |
| 29 // The returned year is offset by 1900. The returned month is 0-based. |
| 30 // Returns true if the conversion succeeds, false otherwise. |
| 31 static bool LocalTime(int64_t seconds_since_epoch, tm* tm_result); |
| 32 |
| 33 // Takes the broken down date and time in UTC timezone and computes the |
| 34 // seconds since epoch (midnight, January 1, 1970 UTC). |
| 35 // The given year is offset by 1900. The given month is 0-based. |
| 36 // Returns true if the conversion succeeds, false otherwise. |
| 37 static bool MkGmTime(tm* tm, int64_t* seconds_result); |
| 38 |
| 39 // Takes the broken down date and time in local timezone and computes the |
| 40 // seconds since epoch (midnight, January 1, 1970 UTC). |
| 41 // The given year is offset by 1900. The given month is 0-based. |
| 42 // Returns true if the conversion succeeds, false otherwise. |
| 43 static bool MkTime(tm* tm, int64_t* seconds_result); |
| 44 |
21 // Returns the abbreviated time-zone name for the given instant. | 45 // Returns the abbreviated time-zone name for the given instant. |
22 // For example "CET" or "CEST". | 46 // For example "CET" or "CEST". |
23 static const char* GetTimeZoneName(int64_t seconds_since_epoch); | 47 static bool GetTimeZoneName(int64_t seconds_since_epoch, |
| 48 const char** name_result); |
24 | 49 |
25 // Returns the difference in seconds between local time and UTC for the given | 50 // Returns the difference in seconds between local time and UTC for the given |
26 // instant. | 51 // instant. |
27 // For example 3600 for CET, and 7200 for CEST. | 52 // For example 3600 for CET, and 7200 for CEST. |
28 static int GetTimeZoneOffsetInSeconds(int64_t seconds_since_epoch); | 53 static bool GetTimeZoneOffsetInSeconds(int64_t seconds_since_epoch, |
29 | 54 int* offset_result); |
30 // Returns the difference in seconds between local time and UTC when no | |
31 // daylight saving is active. | |
32 // For example 3600 in CET and CEST. | |
33 static int GetLocalTimeZoneAdjustmentInSeconds(); | |
34 | 55 |
35 // Returns the current time in milliseconds measured | 56 // Returns the current time in milliseconds measured |
36 // from midnight January 1, 1970 UTC. | 57 // from midnight January 1, 1970 UTC. |
37 static int64_t GetCurrentTimeMillis(); | 58 static int64_t GetCurrentTimeMillis(); |
38 | 59 |
39 // Returns the current time in microseconds measured | 60 // Returns the current time in microseconds measured |
40 // from midnight January 1, 1970 UTC. | 61 // from midnight January 1, 1970 UTC. |
41 static int64_t GetCurrentTimeMicros(); | 62 static int64_t GetCurrentTimeMicros(); |
42 | 63 |
43 // Returns the activation frame alignment constraint or zero if | 64 // Returns the activation frame alignment constraint or zero if |
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87 static void Shutdown(); | 108 static void Shutdown(); |
88 | 109 |
89 static void Abort(); | 110 static void Abort(); |
90 | 111 |
91 static void Exit(int code); | 112 static void Exit(int code); |
92 }; | 113 }; |
93 | 114 |
94 } // namespace dart | 115 } // namespace dart |
95 | 116 |
96 #endif // VM_OS_H_ | 117 #endif // VM_OS_H_ |
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