54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
/************************************************
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sig.h -
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$Author$
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$Date$
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created at: Wed Aug 16 01:15:38 JST 1995
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************************************************/
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#ifndef SIG_H
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#define SIG_H
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extern int trap_immediate;
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#define TRAP_BEG (trap_immediate=1)
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#define TRAP_END (trap_immediate=0)
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extern int prohibit_interrupt;
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#define DEFER_INTS {prohibit_interrupt++;}
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#define ALLOW_INTS {prohibit_interrupt--; CHECK_INTS;}
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#define ENABLE_INTS {prohibit_interrupt--;}
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extern int trap_pending;
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#ifdef THREAD
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extern int thread_critical;
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#if defined(HAVE_SETITIMER) && !defined(__BOW__)
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extern int thread_pending;
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void thread_schedule();
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# define CHECK_INTS if (!prohibit_interrupt) {\
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if (trap_pending) rb_trap_exec();\
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if (thread_pending && !thread_critical) thread_schedule();\
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}
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# else
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/* pseudo preemptive thread switching */
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extern int thread_tick;
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#define THREAD_TICK 500
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void thread_schedule();
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# define CHECK_INTS if (!prohibit_interrupt) {\
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if (trap_pending) rb_trap_exec();\
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if (!thread_critical) {\
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if (thread_tick-- <= 0) {\
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thread_tick = THREAD_TICK;\
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thread_schedule();\
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}\
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}\
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}
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# endif
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#else
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# define CHECK_INTS if (!prohibit_interrupt) {\
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if (trap_pending) rb_trap_exec();\
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}
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#endif
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#endif
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