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/* |
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* timer.cpp - Time Manager emulation |
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* |
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* SheepShaver (C) 1997-2005 Christian Bauer and Marc Hellwig |
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* 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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* TODO: Prime(0) |
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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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// Yes, tmWakeUp set? |
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if (ReadMacInt32(tm + tmWakeUp)) { |
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//!! PrimeTime(0) means continue previous delay |
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// (save wakeup time in RmvTime?) |
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if (time == 0) { |
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printf("FATAL: Unsupported PrimeTime(0)\n"); |
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return 0; |
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} |
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// PrimeTime(0) can either mean (a) "the task runs as soon as interrupts are enabled" |
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// or (b) "continue previous delay" if an expired task was stopped via RmvTime() and |
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// then re-installed using InsXTime(). Since tmWakeUp was set, this is case (b). |
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// The remaining time was saved in tmCount by RmvTime(). |
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timer_mac2host_time(delay, ReadMacInt16(tm + tmCount)); |
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// Yes, calculate wakeup time relative to last scheduled time |
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tm_time_t wakeup; |
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tm_time_t system_time; |
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timer_current_time(system_time); |
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pthread_mutex_lock(&wakeup_time_lock); |
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if (timer_cmp_time(wakeup_time, system_time) < 0) { |
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// Timer expired, trigger interrupt |
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pthread_mutex_lock(&wakeup_time_lock); |
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wakeup_time = wakeup_time_max; |
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pthread_mutex_unlock(&wakeup_time_lock); |
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SetInterruptFlag(INTFLAG_TIMER); |
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TriggerInterrupt(); |
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} |
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pthread_mutex_unlock(&wakeup_time_lock); |
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} |
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return NULL; |
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} |
