1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
/*
FALCON - The Falcon Programming Language.
FILE: time_sys_unix.cpp
Unix system implementation for time related service
-------------------------------------------------------------------
Author: Giancarlo Niccolai
Begin: lun mar 6 2006
-------------------------------------------------------------------
(C) Copyright 2004: the FALCON developers (see list in AUTHORS file)
See LICENSE file for licensing details.
*/
/** \file
Unix system implementation for time related service
*/
#define _REENTRANT
#include <sys/time.h>
#include <falcon/timestamp.h>
#include <falcon/time_sys_unix.h>
namespace Falcon {
namespace Sys {
namespace Time {
static TimeZone s_cached_timezone = tz_local; // which is also 0
void currentTime( ::Falcon::TimeStamp &ts )
{
struct timeval current;
struct tm date;
time_t t;
time( &t );
localtime_r( &t, &date );
ts.m_year = date.tm_year + 1900;
ts.m_month = date.tm_mon+1;
ts.m_day = date.tm_mday;
ts.m_hour = date.tm_hour;
ts.m_minute = date.tm_min;
ts.m_second = date.tm_sec;
// todo: collect day of year and weekday
ts.m_timezone = tz_local;
gettimeofday( ¤t, 0 );
ts.m_msec = current.tv_usec / 1000;
}
TimeZone getLocalTimeZone()
{
// this function is not reentrant, but it's ok, as
// the worst thing that may happen in MT or multiprocess
// is double calculation of the cached value.
// infer timezone by checking gmtime/localtime
if( s_cached_timezone == tz_local )
{
struct tm gmt;
struct tm loc;
time_t now;
time( &now );
localtime_r( &now, &loc );
gmtime_r( &now, &gmt );
// great, let's determine the time shift
int64 tgmt = mktime( &gmt );
int64 tloc = mktime( &loc );
long shift = (long) (tloc - tgmt);
if ( loc.tm_isdst )
{
shift += 3600;
}
long hours = shift / 3600;
long minutes = (shift/60) % 60;
// and now, let's see if we have one of our zones:
switch( hours )
{
case 1: s_cached_timezone = tz_UTC_E_1; break;
case 2: s_cached_timezone = tz_UTC_E_2; break;
case 3: s_cached_timezone = tz_UTC_E_3; break;
case 4: s_cached_timezone = tz_UTC_E_4; break;
case 5: s_cached_timezone = tz_UTC_E_5; break;
case 6: s_cached_timezone = tz_UTC_E_6; break;
case 7: s_cached_timezone = tz_UTC_E_7; break;
case 8: s_cached_timezone = tz_UTC_E_8; break;
case 9:
if( minutes == 30 )
s_cached_timezone = tz_ACST;
else
s_cached_timezone = tz_UTC_E_9;
break;
case 10:
if( minutes == 30 )
s_cached_timezone = tz_ACDT;
else
s_cached_timezone = tz_UTC_E_10;
break;
case 11:
if( minutes == 30 )
s_cached_timezone = tz_NFT;
else
s_cached_timezone = tz_UTC_E_11;
break;
case 12: s_cached_timezone = tz_UTC_E_11; break;
case -1: s_cached_timezone = tz_UTC_W_1;
case -2:
if( minutes == 30 )
s_cached_timezone = tz_HAT;
else
s_cached_timezone = tz_UTC_W_2;
break;
case -3:
if( minutes == 30 )
s_cached_timezone = tz_NST;
else
s_cached_timezone = tz_UTC_W_3;
break;
case -4: s_cached_timezone = tz_UTC_W_4; break;
case -5: s_cached_timezone = tz_UTC_W_5; break;
case -6: s_cached_timezone = tz_UTC_W_6; break;
case -7: s_cached_timezone = tz_UTC_W_7; break;
case -8: s_cached_timezone = tz_UTC_W_8; break;
case -9: s_cached_timezone = tz_UTC_W_9; break;
case -10: s_cached_timezone = tz_UTC_W_10; break;
case -11: s_cached_timezone = tz_UTC_W_11; break;
case -12: s_cached_timezone = tz_UTC_W_12; break;
default:
s_cached_timezone = tz_NONE;
}
}
return s_cached_timezone;
}
numeric seconds()
{
struct timeval time;
gettimeofday( &time, 0 );
return time.tv_sec + (time.tv_usec / 1000000.0 );
}
bool absoluteWait( const TimeStamp &ts )
{
TimeStamp now;
currentTime( now );
if ( ts <= now )
return false;
TimeStamp diff = ts - now;
struct timespec tw;
tw.tv_nsec = diff.m_msec *10000000;
tw.tv_sec = (time_t) diff.m_day * (24*3600) + diff.m_hour * 3600 +
diff.m_minute * 60 + diff.m_second;
if ( nanosleep( &tw, 0 ) == -1 )
return false;
return true;
}
bool relativeWait( const TimeStamp &ts )
{
struct timespec tw;
tw.tv_nsec = ts.m_msec *10000000;
tw.tv_sec = (time_t) ts.m_day * (24*3600) + ts.m_hour * 3600 + ts.m_minute * 60 + ts.m_second;
if ( nanosleep( &tw, 0 ) == -1 )
return false;
return true;
}
bool nanoWait( int32 seconds, int32 nanoseconds )
{
struct timespec tw;
tw.tv_nsec = nanoseconds;
tw.tv_sec = (time_t) seconds;
if ( nanosleep( &tw, 0 ) == -1 )
return false;
return true;
}
void timestampFromSystemTime( const SystemTime &sys_time, TimeStamp &ts )
{
struct tm date;
const UnixSystemTime *unix_time = static_cast< const UnixSystemTime *>( &sys_time );
localtime_r( & unix_time->m_time_t, &date );
ts.m_year = date.tm_year + 1900;
ts.m_month = date.tm_mon+1;
ts.m_day = date.tm_mday;
ts.m_hour = date.tm_hour;
ts.m_minute = date.tm_min;
ts.m_second = date.tm_sec;
// todo: collect day of year and weekday
ts.m_timezone = tz_local;
}
} // time
} // sys
}
/* end of time_sys_unix.cpp */
|
