1 | /* |
---|
2 | * $Id$ |
---|
3 | */ |
---|
4 | |
---|
5 | #include <assert.h> |
---|
6 | #include <time.h> |
---|
7 | #include <errno.h> |
---|
8 | |
---|
9 | #include <rtems/system.h> |
---|
10 | #include <rtems/score/isr.h> |
---|
11 | #include <rtems/score/thread.h> |
---|
12 | #include <rtems/score/tod.h> |
---|
13 | |
---|
14 | /* |
---|
15 | * Seconds from January 1, 1970 to January 1, 1988. Used to account for |
---|
16 | * differences between POSIX API and RTEMS core. |
---|
17 | */ |
---|
18 | |
---|
19 | #define POSIX_TIME_SECONDS_1970_THROUGH_1988 \ |
---|
20 | (((1987 - 1970 + 1) * TOD_SECONDS_PER_NON_LEAP_YEAR) + \ |
---|
21 | (4 * TOD_SECONDS_PER_DAY)) |
---|
22 | |
---|
23 | /* |
---|
24 | * _POSIX_Time_Spec_to_interval |
---|
25 | */ |
---|
26 | |
---|
27 | Watchdog_Interval _POSIX_Time_Spec_to_interval( |
---|
28 | const struct timespec *time |
---|
29 | ) |
---|
30 | { |
---|
31 | Watchdog_Interval ticks; |
---|
32 | |
---|
33 | ticks = (time->tv_sec * TOD_MICROSECONDS_PER_SECOND) / |
---|
34 | _TOD_Microseconds_per_tick; |
---|
35 | |
---|
36 | ticks += (time->tv_nsec / TOD_NANOSECONDS_PER_MICROSECOND) / |
---|
37 | _TOD_Microseconds_per_tick; |
---|
38 | |
---|
39 | return ticks; |
---|
40 | } |
---|
41 | |
---|
42 | /* |
---|
43 | * 4.5.1 Get System Time, P1003.1b-1993, p. 91 |
---|
44 | */ |
---|
45 | |
---|
46 | time_t time( |
---|
47 | time_t *tloc |
---|
48 | ) |
---|
49 | { |
---|
50 | time_t seconds_since_epoch; |
---|
51 | |
---|
52 | if ( !_TOD_Is_set() ) { |
---|
53 | errno = EINVAL; |
---|
54 | return -1; |
---|
55 | } |
---|
56 | |
---|
57 | /* |
---|
58 | * Internally the RTEMS epoch is 1988. This must be taken into account. |
---|
59 | */ |
---|
60 | |
---|
61 | seconds_since_epoch = _TOD_Seconds_since_epoch; |
---|
62 | |
---|
63 | seconds_since_epoch += POSIX_TIME_SECONDS_1970_THROUGH_1988; |
---|
64 | |
---|
65 | if ( tloc ) |
---|
66 | *tloc = seconds_since_epoch; |
---|
67 | |
---|
68 | return seconds_since_epoch; |
---|
69 | } |
---|
70 | |
---|
71 | /* |
---|
72 | * 14.2.1 Clocks, P1003.1b-1993, p. 263 |
---|
73 | */ |
---|
74 | |
---|
75 | int clock_settime( |
---|
76 | clockid_t clock_id, |
---|
77 | const struct timespec *tp |
---|
78 | ) |
---|
79 | { |
---|
80 | struct tm split_time; |
---|
81 | TOD_Control tod; |
---|
82 | Watchdog_Interval seconds; |
---|
83 | |
---|
84 | assert( tp ); |
---|
85 | |
---|
86 | switch ( clock_id ) { |
---|
87 | |
---|
88 | case CLOCK_REALTIME: |
---|
89 | (void) gmtime_r( &tp->tv_sec, &split_time ); |
---|
90 | |
---|
91 | /* |
---|
92 | * Convert the tm structure format to that used by the TOD Handler |
---|
93 | * |
---|
94 | * NOTE: TOD Handler does not honor leap seconds. |
---|
95 | */ |
---|
96 | |
---|
97 | tod.year = split_time.tm_year + 1900; /* RHS is years since 1900 */ |
---|
98 | tod.month = split_time.tm_mon + 1; /* RHS uses 0-11 */ |
---|
99 | tod.day = split_time.tm_mday; |
---|
100 | tod.hour = split_time.tm_hour; |
---|
101 | tod.minute = split_time.tm_min; |
---|
102 | tod.second = split_time.tm_sec; /* RHS allows 0-61 for leap seconds */ |
---|
103 | |
---|
104 | tod.ticks = (tp->tv_nsec / TOD_NANOSECONDS_PER_MICROSECOND) / |
---|
105 | _TOD_Microseconds_per_tick; |
---|
106 | |
---|
107 | if ( !_TOD_Validate( &tod ) ) { |
---|
108 | errno = EINVAL; |
---|
109 | return -1; |
---|
110 | } |
---|
111 | |
---|
112 | /* |
---|
113 | * We can't use the tp->tv_sec field because it is based on |
---|
114 | * a different EPOCH. |
---|
115 | */ |
---|
116 | |
---|
117 | seconds = _TOD_To_seconds( &tod ); |
---|
118 | _Thread_Disable_dispatch(); |
---|
119 | _TOD_Set( &tod, seconds ); |
---|
120 | _Thread_Enable_dispatch(); |
---|
121 | break; |
---|
122 | |
---|
123 | #ifdef _POSIX_CPUTIME |
---|
124 | case CLOCK_PROCESS_CPUTIME: |
---|
125 | return POSIX_NOT_IMPLEMENTED(); |
---|
126 | break; |
---|
127 | #endif |
---|
128 | |
---|
129 | #ifdef _POSIX_THREAD_CPUTIME |
---|
130 | case CLOCK_THREAD_CPUTIME: |
---|
131 | return POSIX_NOT_IMPLEMENTED(); |
---|
132 | break; |
---|
133 | #endif |
---|
134 | default: |
---|
135 | errno = EINVAL; |
---|
136 | return -1; |
---|
137 | |
---|
138 | } |
---|
139 | return 0; |
---|
140 | } |
---|
141 | |
---|
142 | /* |
---|
143 | * 14.2.1 Clocks, P1003.1b-1993, p. 263 |
---|
144 | */ |
---|
145 | |
---|
146 | int clock_gettime( |
---|
147 | clockid_t clock_id, |
---|
148 | struct timespec *tp |
---|
149 | ) |
---|
150 | { |
---|
151 | ISR_Level level; |
---|
152 | time_t seconds; |
---|
153 | long ticks; |
---|
154 | |
---|
155 | assert( tp ); |
---|
156 | |
---|
157 | switch ( clock_id ) { |
---|
158 | |
---|
159 | case CLOCK_REALTIME: |
---|
160 | if ( !_TOD_Is_set() ) { /* XXX does posix allow it to not be set? */ |
---|
161 | errno = EINVAL; |
---|
162 | return -1; |
---|
163 | } |
---|
164 | |
---|
165 | _ISR_Disable( level ); |
---|
166 | seconds = _TOD_Seconds_since_epoch; |
---|
167 | ticks = _TOD_Current.ticks; |
---|
168 | _ISR_Enable( level ); |
---|
169 | |
---|
170 | tp->tv_sec = seconds + POSIX_TIME_SECONDS_1970_THROUGH_1988; |
---|
171 | tp->tv_nsec = ticks * _TOD_Microseconds_per_tick * |
---|
172 | TOD_NANOSECONDS_PER_MICROSECOND; |
---|
173 | break; |
---|
174 | |
---|
175 | #ifdef _POSIX_CPUTIME |
---|
176 | case CLOCK_PROCESS_CPUTIME: |
---|
177 | /* could base this on _Watchdog_Ticks_since_boot -- must make set work though*/ |
---|
178 | return POSIX_NOT_IMPLEMENTED(); |
---|
179 | break; |
---|
180 | #endif |
---|
181 | |
---|
182 | #ifdef _POSIX_THREAD_CPUTIME |
---|
183 | case CLOCK_THREAD_CPUTIME: |
---|
184 | return POSIX_NOT_IMPLEMENTED(); |
---|
185 | break; |
---|
186 | #endif |
---|
187 | default: |
---|
188 | errno = EINVAL; |
---|
189 | return -1; |
---|
190 | |
---|
191 | } |
---|
192 | return 0; |
---|
193 | } |
---|
194 | |
---|
195 | /* |
---|
196 | * 14.2.1 Clocks, P1003.1b-1993, p. 263 |
---|
197 | */ |
---|
198 | |
---|
199 | int clock_getres( |
---|
200 | clockid_t clock_id, |
---|
201 | struct timespec *res |
---|
202 | ) |
---|
203 | { |
---|
204 | switch ( clock_id ) { |
---|
205 | |
---|
206 | /* |
---|
207 | * All time in rtems is based on the same clock tick. |
---|
208 | */ |
---|
209 | |
---|
210 | case CLOCK_REALTIME: |
---|
211 | case CLOCK_PROCESS_CPUTIME: |
---|
212 | case CLOCK_THREAD_CPUTIME: |
---|
213 | if ( res ) { |
---|
214 | res->tv_sec = _TOD_Microseconds_per_tick / TOD_MICROSECONDS_PER_SECOND; |
---|
215 | res->tv_nsec = |
---|
216 | (_TOD_Microseconds_per_tick % TOD_MICROSECONDS_PER_SECOND) * |
---|
217 | TOD_NANOSECONDS_PER_MICROSECOND; |
---|
218 | } |
---|
219 | break; |
---|
220 | |
---|
221 | default: |
---|
222 | errno = EINVAL; |
---|
223 | return -1; |
---|
224 | |
---|
225 | } |
---|
226 | return 0; |
---|
227 | } |
---|
228 | |
---|
229 | /* |
---|
230 | * 14.2.2 Create a Per-Process Timer, P1003.1b-1993, p. 264 |
---|
231 | */ |
---|
232 | |
---|
233 | int timer_create( |
---|
234 | clockid_t clock_id, |
---|
235 | struct sigevent *evp, |
---|
236 | timer_t *timerid |
---|
237 | ) |
---|
238 | { |
---|
239 | return POSIX_NOT_IMPLEMENTED(); |
---|
240 | } |
---|
241 | |
---|
242 | /* |
---|
243 | * 14.2.3 Delete a Per_process Timer, P1003.1b-1993, p. 266 |
---|
244 | */ |
---|
245 | |
---|
246 | int timer_delete( |
---|
247 | timer_t timerid |
---|
248 | ) |
---|
249 | { |
---|
250 | return POSIX_NOT_IMPLEMENTED(); |
---|
251 | } |
---|
252 | |
---|
253 | /* |
---|
254 | * 14.2.4 Per-Process Timers, P1003.1b-1993, p. 267 |
---|
255 | */ |
---|
256 | |
---|
257 | int timer_settime( |
---|
258 | timer_t timerid, |
---|
259 | int flags, |
---|
260 | const struct itimerspec *value, |
---|
261 | struct itimerspec *ovalue |
---|
262 | ) |
---|
263 | { |
---|
264 | return POSIX_NOT_IMPLEMENTED(); |
---|
265 | } |
---|
266 | |
---|
267 | /* |
---|
268 | * 14.2.4 Per-Process Timers, P1003.1b-1993, p. 267 |
---|
269 | */ |
---|
270 | |
---|
271 | int timer_gettime( |
---|
272 | timer_t timerid, |
---|
273 | struct itimerspec *value |
---|
274 | ) |
---|
275 | { |
---|
276 | return POSIX_NOT_IMPLEMENTED(); |
---|
277 | } |
---|
278 | |
---|
279 | /* |
---|
280 | * 14.2.4 Per-Process Timers, P1003.1b-1993, p. 267 |
---|
281 | */ |
---|
282 | |
---|
283 | int timer_getoverrun( |
---|
284 | timer_t timerid |
---|
285 | ) |
---|
286 | { |
---|
287 | return POSIX_NOT_IMPLEMENTED(); |
---|
288 | } |
---|
289 | |
---|
290 | /* |
---|
291 | * 14.2.5 High Resolution Sleep, P1003.1b-1993, p. 269 |
---|
292 | */ |
---|
293 | |
---|
294 | int nanosleep( |
---|
295 | const struct timespec *rqtp, |
---|
296 | struct timespec *rmtp |
---|
297 | ) |
---|
298 | { |
---|
299 | Watchdog_Interval ticks; |
---|
300 | |
---|
301 | if ( rqtp->tv_nsec < 0 || rqtp->tv_nsec >= TOD_NANOSECONDS_PER_SECOND ) { |
---|
302 | errno = EINVAL; |
---|
303 | return -1; |
---|
304 | } |
---|
305 | |
---|
306 | /* XXX this is interruptible by a posix signal */ |
---|
307 | |
---|
308 | /* XXX rmtp is the time remaining on the timer -- we do not support this */ |
---|
309 | |
---|
310 | ticks = _POSIX_Time_Spec_to_interval( rqtp ); |
---|
311 | |
---|
312 | _Thread_Disable_dispatch(); |
---|
313 | _Thread_Set_state( _Thread_Executing, STATES_WAITING_FOR_TIME ); |
---|
314 | _Watchdog_Initialize( |
---|
315 | &_Thread_Executing->Timer, |
---|
316 | _Thread_Delay_ended, /* XXX may need to be POSIX specific */ |
---|
317 | _Thread_Executing->Object.id, |
---|
318 | NULL |
---|
319 | ); |
---|
320 | _Watchdog_Insert_ticks( &_Thread_Executing->Timer, ticks ); |
---|
321 | _Thread_Enable_dispatch(); |
---|
322 | |
---|
323 | if ( rmtp ) { |
---|
324 | /* XXX calculate time remaining */ |
---|
325 | } |
---|
326 | |
---|
327 | return 0; /* XXX should account for signal */ |
---|
328 | |
---|
329 | } |
---|
330 | |
---|
331 | /* |
---|
332 | * 20.1.3 Accessing a Process CPU-time CLock, P1003.4b/D8, p. 55 |
---|
333 | */ |
---|
334 | |
---|
335 | int clock_getcpuclockid( |
---|
336 | pid_t pid, |
---|
337 | clockid_t *clock_id |
---|
338 | ) |
---|
339 | { |
---|
340 | return POSIX_NOT_IMPLEMENTED(); |
---|
341 | } |
---|
342 | |
---|
343 | /* |
---|
344 | * 20.1.5 CPU-time Clock Attribute Access, P1003.4b/D8, p. 58 |
---|
345 | */ |
---|
346 | |
---|
347 | int clock_setenable_attr( |
---|
348 | clockid_t clock_id, |
---|
349 | int attr |
---|
350 | ) |
---|
351 | { |
---|
352 | return POSIX_NOT_IMPLEMENTED(); |
---|
353 | } |
---|
354 | |
---|
355 | /* |
---|
356 | * 20.1.5 CPU-time Clock Attribute Access, P1003.4b/D8, p. 58 |
---|
357 | */ |
---|
358 | |
---|
359 | int clock_getenable_attr( |
---|
360 | clockid_t clock_id, |
---|
361 | int *attr |
---|
362 | ) |
---|
363 | { |
---|
364 | return POSIX_NOT_IMPLEMENTED(); |
---|
365 | } |
---|