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/* |
2 |
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* timer.cpp - Time Manager emulation |
3 |
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* |
4 |
< |
* SheepShaver (C) 1997-2005 Christian Bauer and Marc Hellwig |
4 |
> |
* SheepShaver (C) 1997-2008 Christian Bauer and Marc Hellwig |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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|
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– |
/* |
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* TODO: Prime(0) |
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*/ |
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|
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#include "sysdeps.h" |
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#include "timer.h" |
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#include "macos_util.h" |
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#include "main.h" |
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#include "cpu_emulation.h" |
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|
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#ifdef PRECISE_TIMING_POSIX |
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#include <pthread.h> |
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#include <semaphore.h> |
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#endif |
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|
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#ifdef PRECISE_TIMING_MACH |
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#include <mach/mach.h> |
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#endif |
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|
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#define DEBUG 0 |
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#include "debug.h" |
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|
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|
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#if __BEOS__ |
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#define PRECISE_TIMING 1 |
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#else |
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#define PRECISE_TIMING 0 |
39 |
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#endif |
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|
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#define TM_QUEUE 0 // Enable TMQueue management (doesn't work) |
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|
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|
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struct TMDesc { |
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uint32 task; // Mac address of associated TMTask |
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tm_time_t wakeup; // Time this task is scheduled for execution |
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bool in_use; // Flag: descriptor in use |
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> |
TMDesc *next; |
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}; |
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|
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const int NUM_DESCS = 64; // Maximum number of descriptors |
61 |
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static TMDesc desc[NUM_DESCS]; |
59 |
> |
static TMDesc *tmDescList; |
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|
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#if PRECISE_TIMING |
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#ifdef PRECISE_TIMING_BEOS |
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static thread_id timer_thread = -1; |
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static bool thread_active = true; |
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static volatile tm_time_t wakeup_time = 0x7fffffffffffffff; |
65 |
> |
static const tm_time_t wakeup_time_max = 0x7fffffffffffffff; |
66 |
> |
static volatile tm_time_t wakeup_time = wakeup_time_max; |
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static sem_id wakeup_time_sem = -1; |
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static int32 timer_func(void *arg); |
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#endif |
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#ifdef PRECISE_TIMING_POSIX |
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static pthread_t timer_thread; |
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static bool timer_thread_active = false; |
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static volatile bool timer_thread_cancel = false; |
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static tm_time_t wakeup_time_max = { 0x7fffffff, 999999999 }; |
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static tm_time_t wakeup_time = wakeup_time_max; |
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static pthread_mutex_t wakeup_time_lock = PTHREAD_MUTEX_INITIALIZER; |
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static void *timer_func(void *arg); |
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#endif |
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#ifdef PRECISE_TIMING_MACH |
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static clock_serv_t system_clock; |
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static thread_act_t timer_thread; |
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static bool timer_thread_active = false; |
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static tm_time_t wakeup_time_max = { 0x7fffffff, 999999999 }; |
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static tm_time_t wakeup_time = wakeup_time_max; |
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static semaphore_t wakeup_time_sem; |
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static void *timer_func(void *arg); |
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#endif |
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#endif |
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|
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|
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/* |
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* Allocate descriptor for given TMTask in list |
74 |
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*/ |
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|
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static int alloc_desc(uint32 tm) |
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inline static void free_desc(TMDesc *desc) |
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{ |
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// Search for first free descriptor |
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for (int i=0; i<NUM_DESCS; i++) |
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if (!desc[i].in_use) { |
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desc[i].task = tm; |
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desc[i].in_use = true; |
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return i; |
93 |
> |
if (desc == tmDescList) { |
94 |
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tmDescList = desc->next; |
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> |
} else { |
96 |
> |
for (TMDesc *d = tmDescList; d; d = d->next) { |
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if (d->next == desc) { |
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d->next = desc->next; |
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break; |
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} |
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} |
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return -1; |
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} |
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|
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|
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/* |
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* Free descriptor in list |
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*/ |
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|
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inline static void free_desc(int i) |
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{ |
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desc[i].in_use = false; |
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} |
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delete desc; |
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} |
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|
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|
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/* |
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* Find descriptor associated with given TMTask |
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*/ |
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|
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inline static int find_desc(uint32 tm) |
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> |
inline static TMDesc *find_desc(uint32 tm) |
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{ |
112 |
< |
for (int i=0; i<NUM_DESCS; i++) |
113 |
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if (desc[i].in_use && desc[i].task == tm) |
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< |
return i; |
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return -1; |
112 |
> |
TMDesc *desc = tmDescList; |
113 |
> |
while (desc) { |
114 |
> |
if (desc->task == tm) { |
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> |
return desc; |
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} |
117 |
> |
desc = desc->next; |
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} |
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> |
return NULL; |
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} |
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|
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|
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|
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|
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/* |
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* Timer thread operations |
158 |
+ |
*/ |
159 |
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|
160 |
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#ifdef PRECISE_TIMING_POSIX |
161 |
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const int SIGSUSPEND = SIGRTMIN + 6; |
162 |
+ |
const int SIGRESUME = SIGRTMIN + 7; |
163 |
+ |
static struct sigaction sigsuspend_action; |
164 |
+ |
static struct sigaction sigresume_action; |
165 |
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|
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static int suspend_count = 0; |
167 |
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static pthread_mutex_t suspend_count_lock = PTHREAD_MUTEX_INITIALIZER; |
168 |
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static sem_t suspend_ack_sem; |
169 |
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static sigset_t suspend_handler_mask; |
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|
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// Signal handler for suspended thread |
172 |
+ |
static void sigsuspend_handler(int sig) |
173 |
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{ |
174 |
+ |
sem_post(&suspend_ack_sem); |
175 |
+ |
sigsuspend(&suspend_handler_mask); |
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+ |
} |
177 |
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|
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// Signal handler for resumed thread |
179 |
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static void sigresume_handler(int sig) |
180 |
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{ |
181 |
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/* simply trigger a signal to stop clock_nanosleep() */ |
182 |
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} |
183 |
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|
184 |
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// Initialize timer thread |
185 |
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static bool timer_thread_init(void) |
186 |
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{ |
187 |
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// Install suspend signal handler |
188 |
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sigemptyset(&sigsuspend_action.sa_mask); |
189 |
+ |
sigaddset(&sigsuspend_action.sa_mask, SIGRESUME); |
190 |
+ |
sigsuspend_action.sa_handler = sigsuspend_handler; |
191 |
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sigsuspend_action.sa_flags = SA_RESTART; |
192 |
+ |
#ifdef HAVE_SIGNAL_SA_RESTORER |
193 |
+ |
sigsuspend_action.sa_restorer = NULL; |
194 |
+ |
#endif |
195 |
+ |
if (sigaction(SIGSUSPEND, &sigsuspend_action, NULL) < 0) |
196 |
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return false; |
197 |
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|
198 |
+ |
// Install resume signal handler |
199 |
+ |
sigemptyset(&sigresume_action.sa_mask); |
200 |
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sigresume_action.sa_handler = sigresume_handler; |
201 |
+ |
sigresume_action.sa_flags = SA_RESTART; |
202 |
+ |
#ifdef HAVE_SIGNAL_SA_RESTORER |
203 |
+ |
sigresume_action.sa_restorer = NULL; |
204 |
+ |
#endif |
205 |
+ |
if (sigaction(SIGRESUME, &sigresume_action, NULL) < 0) |
206 |
+ |
return false; |
207 |
+ |
|
208 |
+ |
// Initialize semaphore |
209 |
+ |
if (sem_init(&suspend_ack_sem, 0, 0) < 0) |
210 |
+ |
return false; |
211 |
+ |
|
212 |
+ |
// Initialize suspend_handler_mask, it excludes SIGRESUME |
213 |
+ |
if (sigfillset(&suspend_handler_mask) != 0) |
214 |
+ |
return false; |
215 |
+ |
if (sigdelset(&suspend_handler_mask, SIGRESUME) != 0) |
216 |
+ |
return false; |
217 |
+ |
|
218 |
+ |
// Create thread in running state |
219 |
+ |
suspend_count = 0; |
220 |
+ |
return (pthread_create(&timer_thread, NULL, timer_func, NULL) == 0); |
221 |
+ |
} |
222 |
+ |
|
223 |
+ |
// Kill timer thread |
224 |
+ |
static void timer_thread_kill(void) |
225 |
+ |
{ |
226 |
+ |
timer_thread_cancel = true; |
227 |
+ |
#ifdef HAVE_PTHREAD_CANCEL |
228 |
+ |
pthread_cancel(timer_thread); |
229 |
+ |
#endif |
230 |
+ |
pthread_join(timer_thread, NULL); |
231 |
+ |
} |
232 |
+ |
|
233 |
+ |
// Suspend timer thread |
234 |
+ |
static void timer_thread_suspend(void) |
235 |
+ |
{ |
236 |
+ |
pthread_mutex_lock(&suspend_count_lock); |
237 |
+ |
if (suspend_count == 0) { |
238 |
+ |
suspend_count ++; |
239 |
+ |
if (pthread_kill(timer_thread, SIGSUSPEND) == 0) |
240 |
+ |
sem_wait(&suspend_ack_sem); |
241 |
+ |
} |
242 |
+ |
pthread_mutex_unlock(&suspend_count_lock); |
243 |
+ |
} |
244 |
+ |
|
245 |
+ |
// Resume timer thread |
246 |
+ |
static void timer_thread_resume(void) |
247 |
+ |
{ |
248 |
+ |
pthread_mutex_lock(&suspend_count_lock); |
249 |
+ |
assert(suspend_count > 0); |
250 |
+ |
if (suspend_count == 1) { |
251 |
+ |
suspend_count = 0; |
252 |
+ |
pthread_kill(timer_thread, SIGRESUME); |
253 |
+ |
} |
254 |
+ |
pthread_mutex_unlock(&suspend_count_lock); |
255 |
+ |
} |
256 |
+ |
#endif |
257 |
+ |
|
258 |
+ |
|
259 |
+ |
/* |
260 |
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* Initialize Time Manager |
261 |
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*/ |
262 |
|
|
263 |
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void TimerInit(void) |
264 |
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{ |
265 |
< |
// Mark all descriptors as inactive |
152 |
< |
for (int i=0; i<NUM_DESCS; i++) |
153 |
< |
free_desc(i); |
265 |
> |
TimerReset(); |
266 |
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|
267 |
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#if PRECISE_TIMING |
268 |
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// Start timer thread |
269 |
+ |
#ifdef PRECISE_TIMING_BEOS |
270 |
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wakeup_time_sem = create_sem(1, "Wakeup Time"); |
271 |
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timer_thread = spawn_thread(timer_func, "Time Manager", B_REAL_TIME_PRIORITY, NULL); |
272 |
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resume_thread(timer_thread); |
273 |
+ |
#elif PRECISE_TIMING_MACH |
274 |
+ |
pthread_t pthread; |
275 |
+ |
|
276 |
+ |
host_get_clock_service(mach_host_self(), REALTIME_CLOCK, &system_clock); |
277 |
+ |
semaphore_create(mach_task_self(), &wakeup_time_sem, SYNC_POLICY_FIFO, 1); |
278 |
+ |
|
279 |
+ |
pthread_create(&pthread, NULL, &timer_func, NULL); |
280 |
+ |
#endif |
281 |
+ |
#ifdef PRECISE_TIMING_POSIX |
282 |
+ |
timer_thread_active = timer_thread_init(); |
283 |
+ |
#endif |
284 |
|
#endif |
285 |
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} |
286 |
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|
294 |
|
#if PRECISE_TIMING |
295 |
|
// Quit timer thread |
296 |
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if (timer_thread > 0) { |
297 |
+ |
#ifdef PRECISE_TIMING_BEOS |
298 |
|
status_t l; |
299 |
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thread_active = false; |
300 |
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suspend_thread(timer_thread); |
301 |
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resume_thread(timer_thread); |
302 |
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wait_for_thread(timer_thread, &l); |
303 |
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delete_sem(wakeup_time_sem); |
304 |
+ |
#endif |
305 |
+ |
#ifdef PRECISE_TIMING_MACH |
306 |
+ |
timer_thread_active = false; |
307 |
+ |
semaphore_destroy(mach_task_self(), wakeup_time_sem); |
308 |
+ |
#endif |
309 |
+ |
#ifdef PRECISE_TIMING_POSIX |
310 |
+ |
timer_thread_kill(); |
311 |
+ |
#endif |
312 |
|
} |
313 |
|
#endif |
314 |
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} |
320 |
|
|
321 |
|
void TimerReset(void) |
322 |
|
{ |
323 |
< |
// Mark all descriptors as inactive |
324 |
< |
for (int i=0; i<NUM_DESCS; i++) |
325 |
< |
free_desc(i); |
323 |
> |
TMDesc *desc = tmDescList; |
324 |
> |
while (desc) { |
325 |
> |
TMDesc *next = desc->next; |
326 |
> |
delete desc; |
327 |
> |
desc = next; |
328 |
> |
} |
329 |
> |
tmDescList = NULL; |
330 |
|
} |
331 |
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|
332 |
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|
338 |
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{ |
339 |
|
D(bug("InsTime %08lx, trap %04x\n", tm, trap)); |
340 |
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WriteMacInt16((uint32)tm + qType, ReadMacInt16((uint32)tm + qType) & 0x1fff | (trap << 4) & 0x6000); |
341 |
< |
if (find_desc(tm) >= 0) |
342 |
< |
printf("WARNING: InsTime(): Task re-inserted\n"); |
341 |
> |
if (find_desc(tm)) |
342 |
> |
printf("WARNING: InsTime(%08lx): Task re-inserted\n", tm); |
343 |
|
else { |
344 |
< |
int i = alloc_desc(tm); |
345 |
< |
if (i < 0) |
346 |
< |
printf("FATAL: InsTime(): No free Time Manager descriptor\n"); |
344 |
> |
TMDesc *desc = new TMDesc; |
345 |
> |
desc->task = tm; |
346 |
> |
desc->next = tmDescList; |
347 |
> |
tmDescList = desc; |
348 |
|
} |
349 |
|
return 0; |
350 |
|
} |
359 |
|
D(bug("RmvTime %08lx\n", tm)); |
360 |
|
|
361 |
|
// Find descriptor |
362 |
< |
int i = find_desc(tm); |
363 |
< |
if (i < 0) { |
362 |
> |
TMDesc *desc = find_desc(tm); |
363 |
> |
if (!desc) { |
364 |
|
printf("WARNING: RmvTime(%08lx): Descriptor not found\n", tm); |
365 |
|
return 0; |
366 |
|
} |
367 |
|
|
368 |
|
// Task active? |
369 |
< |
#if PRECISE_TIMING |
369 |
> |
#if PRECISE_TIMING_BEOS |
370 |
|
while (acquire_sem(wakeup_time_sem) == B_INTERRUPTED) ; |
371 |
|
suspend_thread(timer_thread); |
372 |
|
#endif |
373 |
+ |
#ifdef PRECISE_TIMING_MACH |
374 |
+ |
semaphore_wait(wakeup_time_sem); |
375 |
+ |
thread_suspend(timer_thread); |
376 |
+ |
#endif |
377 |
+ |
#if PRECISE_TIMING_POSIX |
378 |
+ |
timer_thread_suspend(); |
379 |
+ |
pthread_mutex_lock(&wakeup_time_lock); |
380 |
+ |
#endif |
381 |
|
if (ReadMacInt16(tm + qType) & 0x8000) { |
382 |
|
|
383 |
|
// Yes, make task inactive and remove it from the Time Manager queue |
385 |
|
dequeue_tm(tm); |
386 |
|
#if PRECISE_TIMING |
387 |
|
// Look for next task to be called and set wakeup_time |
388 |
< |
wakeup_time = 0x7fffffffffffffff; |
389 |
< |
for (int j=0; j<NUM_DESCS; j++) { |
390 |
< |
if (desc[j].in_use && (ReadMacInt16(desc[j].task + qType) & 0x8000)) |
391 |
< |
if (desc[j].wakeup < wakeup_time) |
392 |
< |
wakeup_time = desc[j].wakeup; |
247 |
< |
} |
388 |
> |
wakeup_time = wakeup_time_max; |
389 |
> |
for (TMDesc *d = tmDescList; d; d = d->next) |
390 |
> |
if ((ReadMacInt16(d->task + qType) & 0x8000)) |
391 |
> |
if (timer_cmp_time(d->wakeup, wakeup_time) < 0) |
392 |
> |
wakeup_time = d->wakeup; |
393 |
|
#endif |
394 |
|
|
395 |
|
// Compute remaining time |
396 |
|
tm_time_t remaining, current; |
397 |
|
timer_current_time(current); |
398 |
< |
timer_sub_time(remaining, desc[i].wakeup, current); |
398 |
> |
timer_sub_time(remaining, desc->wakeup, current); |
399 |
|
WriteMacInt32(tm + tmCount, timer_host2mac_time(remaining)); |
400 |
|
} else |
401 |
|
WriteMacInt32(tm + tmCount, 0); |
402 |
|
D(bug(" tmCount %ld\n", ReadMacInt32(tm + tmCount))); |
403 |
< |
#if PRECISE_TIMING |
403 |
> |
#if PRECISE_TIMING_BEOS |
404 |
|
release_sem(wakeup_time_sem); |
405 |
|
thread_info info; |
406 |
|
do { |
408 |
|
get_thread_info(timer_thread, &info); |
409 |
|
} while (info.state == B_THREAD_SUSPENDED); // Sometimes, resume_thread() doesn't work (BeOS bug?) |
410 |
|
#endif |
411 |
+ |
#ifdef PRECISE_TIMING_MACH |
412 |
+ |
semaphore_signal(wakeup_time_sem); |
413 |
+ |
thread_abort(timer_thread); |
414 |
+ |
thread_resume(timer_thread); |
415 |
+ |
#endif |
416 |
+ |
#if PRECISE_TIMING_POSIX |
417 |
+ |
pthread_mutex_unlock(&wakeup_time_lock); |
418 |
+ |
timer_thread_resume(); |
419 |
+ |
assert(suspend_count == 0); |
420 |
+ |
#endif |
421 |
|
|
422 |
|
// Free descriptor |
423 |
< |
free_desc(i); |
423 |
> |
free_desc(desc); |
424 |
|
return 0; |
425 |
|
} |
426 |
|
|
434 |
|
D(bug("PrimeTime %08lx, time %ld\n", tm, time)); |
435 |
|
|
436 |
|
// Find descriptor |
437 |
< |
int i = find_desc(tm); |
438 |
< |
if (i < 0) { |
439 |
< |
printf("FATAL: PrimeTime(): Descriptor not found\n"); |
437 |
> |
TMDesc *desc = find_desc(tm); |
438 |
> |
if (!desc) { |
439 |
> |
printf("FATAL: PrimeTime(%08lx): Descriptor not found\n", tm); |
440 |
|
return 0; |
441 |
|
} |
442 |
|
|
450 |
|
// Yes, tmWakeUp set? |
451 |
|
if (ReadMacInt32(tm + tmWakeUp)) { |
452 |
|
|
453 |
< |
//!! PrimeTime(0) means continue previous delay |
454 |
< |
// (save wakeup time in RmvTime?) |
453 |
> |
// PrimeTime(0) can either mean (a) "the task runs as soon as interrupts are enabled" |
454 |
> |
// or (b) "continue previous delay" if an expired task was stopped via RmvTime() and |
455 |
> |
// then re-installed using InsXTime(). Since tmWakeUp was set, this is case (b). |
456 |
> |
// The remaining time was saved in tmCount by RmvTime(). |
457 |
|
if (time == 0) { |
458 |
< |
printf("FATAL: Unsupported PrimeTime(0)\n"); |
302 |
< |
return 0; |
458 |
> |
timer_mac2host_time(delay, ReadMacInt16(tm + tmCount)); |
459 |
|
} |
460 |
|
|
461 |
|
// Yes, calculate wakeup time relative to last scheduled time |
462 |
|
tm_time_t wakeup; |
463 |
< |
timer_add_time(wakeup, desc[i].wakeup, delay); |
464 |
< |
desc[i].wakeup = wakeup; |
463 |
> |
timer_add_time(wakeup, desc->wakeup, delay); |
464 |
> |
desc->wakeup = wakeup; |
465 |
|
|
466 |
|
} else { |
467 |
|
|
468 |
|
// No, calculate wakeup time relative to current time |
469 |
|
tm_time_t now; |
470 |
|
timer_current_time(now); |
471 |
< |
timer_add_time(desc[i].wakeup, now, delay); |
471 |
> |
timer_add_time(desc->wakeup, now, delay); |
472 |
|
} |
473 |
|
|
474 |
|
// Set tmWakeUp to indicate that task was scheduled |
479 |
|
// Not extended task, calculate wakeup time relative to current time |
480 |
|
tm_time_t now; |
481 |
|
timer_current_time(now); |
482 |
< |
timer_add_time(desc[i].wakeup, now, delay); |
482 |
> |
timer_add_time(desc->wakeup, now, delay); |
483 |
|
} |
484 |
|
|
485 |
|
// Make task active and enqueue it in the Time Manager queue |
486 |
< |
#if PRECISE_TIMING |
486 |
> |
#if PRECISE_TIMING_BEOS |
487 |
|
while (acquire_sem(wakeup_time_sem) == B_INTERRUPTED) ; |
488 |
|
suspend_thread(timer_thread); |
489 |
|
#endif |
490 |
+ |
#ifdef PRECISE_TIMING_MACH |
491 |
+ |
semaphore_wait(wakeup_time_sem); |
492 |
+ |
thread_suspend(timer_thread); |
493 |
+ |
#endif |
494 |
+ |
#if PRECISE_TIMING_POSIX |
495 |
+ |
timer_thread_suspend(); |
496 |
+ |
pthread_mutex_lock(&wakeup_time_lock); |
497 |
+ |
#endif |
498 |
|
WriteMacInt16(tm + qType, ReadMacInt16(tm + qType) | 0x8000); |
499 |
|
enqueue_tm(tm); |
500 |
|
#if PRECISE_TIMING |
501 |
|
// Look for next task to be called and set wakeup_time |
502 |
< |
wakeup_time = 0x7fffffffffffffff; |
503 |
< |
for (int j=0; j<NUM_DESCS; j++) { |
504 |
< |
if (desc[j].in_use && (ReadMacInt16(desc[j].task + qType) & 0x8000)) |
505 |
< |
if (desc[j].wakeup < wakeup_time) |
506 |
< |
wakeup_time = desc[j].wakeup; |
507 |
< |
} |
502 |
> |
wakeup_time = wakeup_time_max; |
503 |
> |
for (TMDesc *d = tmDescList; d; d = d->next) |
504 |
> |
if ((ReadMacInt16(d->task + qType) & 0x8000)) |
505 |
> |
if (timer_cmp_time(d->wakeup, wakeup_time) < 0) |
506 |
> |
wakeup_time = d->wakeup; |
507 |
> |
#ifdef PRECISE_TIMING_BEOS |
508 |
|
release_sem(wakeup_time_sem); |
509 |
|
thread_info info; |
510 |
|
do { |
512 |
|
get_thread_info(timer_thread, &info); |
513 |
|
} while (info.state == B_THREAD_SUSPENDED); // Sometimes, resume_thread() doesn't work (BeOS bug?) |
514 |
|
#endif |
515 |
+ |
#ifdef PRECISE_TIMING_MACH |
516 |
+ |
semaphore_signal(wakeup_time_sem); |
517 |
+ |
thread_abort(timer_thread); |
518 |
+ |
thread_resume(timer_thread); |
519 |
+ |
#endif |
520 |
+ |
#ifdef PRECISE_TIMING_POSIX |
521 |
+ |
pthread_mutex_unlock(&wakeup_time_lock); |
522 |
+ |
timer_thread_resume(); |
523 |
+ |
assert(suspend_count == 0); |
524 |
+ |
#endif |
525 |
+ |
#endif |
526 |
|
return 0; |
527 |
|
} |
528 |
|
|
529 |
|
|
355 |
– |
#if PRECISE_TIMING |
530 |
|
/* |
531 |
|
* Time Manager thread |
532 |
|
*/ |
533 |
|
|
534 |
+ |
#ifdef PRECISE_TIMING_BEOS |
535 |
|
static int32 timer_func(void *arg) |
536 |
|
{ |
537 |
|
while (thread_active) { |
553 |
|
} |
554 |
|
#endif |
555 |
|
|
556 |
+ |
#ifdef PRECISE_TIMING_MACH |
557 |
+ |
static void *timer_func(void *arg) |
558 |
+ |
{ |
559 |
+ |
timer_thread = mach_thread_self(); |
560 |
+ |
timer_thread_active = true; |
561 |
+ |
|
562 |
+ |
while (timer_thread_active) { |
563 |
+ |
clock_sleep(system_clock, TIME_ABSOLUTE, wakeup_time, NULL); |
564 |
+ |
semaphore_wait(wakeup_time_sem); |
565 |
+ |
|
566 |
+ |
tm_time_t system_time; |
567 |
+ |
|
568 |
+ |
timer_current_time(system_time); |
569 |
+ |
if (timer_cmp_time(wakeup_time, system_time) < 0) { |
570 |
+ |
wakeup_time = wakeup_time_max; |
571 |
+ |
SetInterruptFlag(INTFLAG_TIMER); |
572 |
+ |
TriggerInterrupt(); |
573 |
+ |
} |
574 |
+ |
semaphore_signal(wakeup_time_sem); |
575 |
+ |
} |
576 |
+ |
return NULL; |
577 |
+ |
} |
578 |
+ |
#endif |
579 |
+ |
|
580 |
+ |
#ifdef PRECISE_TIMING_POSIX |
581 |
+ |
static void *timer_func(void *arg) |
582 |
+ |
{ |
583 |
+ |
while (!timer_thread_cancel) { |
584 |
+ |
// Wait until time specified by wakeup_time |
585 |
+ |
clock_nanosleep(CLOCK_REALTIME, TIMER_ABSTIME, &wakeup_time, NULL); |
586 |
+ |
|
587 |
+ |
tm_time_t system_time; |
588 |
+ |
timer_current_time(system_time); |
589 |
+ |
if (timer_cmp_time(wakeup_time, system_time) < 0) { |
590 |
+ |
|
591 |
+ |
// Timer expired, trigger interrupt |
592 |
+ |
pthread_mutex_lock(&wakeup_time_lock); |
593 |
+ |
wakeup_time = wakeup_time_max; |
594 |
+ |
pthread_mutex_unlock(&wakeup_time_lock); |
595 |
+ |
SetInterruptFlag(INTFLAG_TIMER); |
596 |
+ |
TriggerInterrupt(); |
597 |
+ |
} |
598 |
+ |
} |
599 |
+ |
return NULL; |
600 |
+ |
} |
601 |
+ |
#endif |
602 |
+ |
|
603 |
|
|
604 |
|
/* |
605 |
|
* Timer interrupt function (executed as part of 60Hz interrupt) |
612 |
|
// Look for active TMTasks that have expired |
613 |
|
tm_time_t now; |
614 |
|
timer_current_time(now); |
615 |
< |
for (int i=0; i<NUM_DESCS; i++) |
616 |
< |
if (desc[i].in_use) { |
617 |
< |
uint32 tm = desc[i].task; |
618 |
< |
if ((ReadMacInt16(tm + qType) & 0x8000) && timer_cmp_time(desc[i].wakeup, now) <= 0) { |
619 |
< |
|
620 |
< |
// Found one, mark as inactive and remove it from the Time Manager queue |
621 |
< |
WriteMacInt16(tm + qType, ReadMacInt16(tm + qType) & 0x7fff); |
622 |
< |
dequeue_tm(tm); |
623 |
< |
|
624 |
< |
// Call timer function |
625 |
< |
uint32 addr = ReadMacInt32(tm + tmAddr); |
626 |
< |
if (addr) { |
627 |
< |
D(bug("Calling TimeTask %08lx, addr %08lx\n", tm, addr)); |
628 |
< |
M68kRegisters r; |
629 |
< |
r.a[0] = addr; |
630 |
< |
r.a[1] = tm; |
631 |
< |
Execute68k(r.a[0], &r); |
632 |
< |
D(bug(" returned from TimeTask\n")); |
633 |
< |
} |
615 |
> |
TMDesc *desc = tmDescList; |
616 |
> |
while (desc) { |
617 |
> |
TMDesc *next = desc->next; |
618 |
> |
uint32 tm = desc->task; |
619 |
> |
if ((ReadMacInt16(tm + qType) & 0x8000) && timer_cmp_time(desc->wakeup, now) <= 0) { |
620 |
> |
|
621 |
> |
// Found one, mark as inactive and remove it from the Time Manager queue |
622 |
> |
WriteMacInt16(tm + qType, ReadMacInt16(tm + qType) & 0x7fff); |
623 |
> |
dequeue_tm(tm); |
624 |
> |
|
625 |
> |
// Call timer function |
626 |
> |
uint32 addr = ReadMacInt32(tm + tmAddr); |
627 |
> |
if (addr) { |
628 |
> |
D(bug("Calling TimeTask %08lx, addr %08lx\n", tm, addr)); |
629 |
> |
M68kRegisters r; |
630 |
> |
r.a[0] = addr; |
631 |
> |
r.a[1] = tm; |
632 |
> |
Execute68k(r.a[0], &r); |
633 |
> |
D(bug(" returned from TimeTask\n")); |
634 |
|
} |
635 |
|
} |
636 |
+ |
desc = next; |
637 |
+ |
} |
638 |
|
|
639 |
|
#if PRECISE_TIMING |
640 |
|
// Look for next task to be called and set wakeup_time |
641 |
+ |
#if PRECISE_TIMING_BEOS |
642 |
|
while (acquire_sem(wakeup_time_sem) == B_INTERRUPTED) ; |
643 |
|
suspend_thread(timer_thread); |
644 |
< |
wakeup_time = 0x7fffffffffffffff; |
645 |
< |
for (int j=0; j<NUM_DESCS; j++) { |
646 |
< |
if (desc[j].in_use && (ReadMacInt16(desc[j].task + qType) & 0x8000)) |
647 |
< |
if (desc[j].wakeup < wakeup_time) |
648 |
< |
wakeup_time = desc[j].wakeup; |
649 |
< |
} |
644 |
> |
#endif |
645 |
> |
#if PRECISE_TIMING_MACH |
646 |
> |
semaphore_wait(wakeup_time_sem); |
647 |
> |
thread_suspend(timer_thread); |
648 |
> |
#endif |
649 |
> |
#if PRECISE_TIMING_POSIX |
650 |
> |
timer_thread_suspend(); |
651 |
> |
pthread_mutex_lock(&wakeup_time_lock); |
652 |
> |
#endif |
653 |
> |
wakeup_time = wakeup_time_max; |
654 |
> |
for (TMDesc *d = tmDescList; d; d = d->next) |
655 |
> |
if ((ReadMacInt16(d->task + qType) & 0x8000)) |
656 |
> |
if (timer_cmp_time(d->wakeup, wakeup_time) < 0) |
657 |
> |
wakeup_time = d->wakeup; |
658 |
> |
#if PRECISE_TIMING_BEOS |
659 |
|
release_sem(wakeup_time_sem); |
660 |
|
thread_info info; |
661 |
|
do { |
663 |
|
get_thread_info(timer_thread, &info); |
664 |
|
} while (info.state == B_THREAD_SUSPENDED); // Sometimes, resume_thread() doesn't work (BeOS bug?) |
665 |
|
#endif |
666 |
+ |
#if PRECISE_TIMING_MACH |
667 |
+ |
semaphore_signal(wakeup_time_sem); |
668 |
+ |
thread_abort(timer_thread); |
669 |
+ |
thread_resume(timer_thread); |
670 |
+ |
#endif |
671 |
+ |
#if PRECISE_TIMING_POSIX |
672 |
+ |
pthread_mutex_unlock(&wakeup_time_lock); |
673 |
+ |
timer_thread_resume(); |
674 |
+ |
assert(suspend_count == 0); |
675 |
+ |
#endif |
676 |
+ |
#endif |
677 |
|
} |