diff options
Diffstat (limited to 'sig.h')
-rw-r--r-- | sig.h | 53 |
1 files changed, 53 insertions, 0 deletions
@@ -0,0 +1,53 @@ +/************************************************ + + sig.h - + + $Author$ + $Date$ + created at: Wed Aug 16 01:15:38 JST 1995 + +************************************************/ +#ifndef SIG_H +#define SIG_H + +extern int trap_immediate; +#define TRAP_BEG (trap_immediate=1) +#define TRAP_END (trap_immediate=0) + +extern int prohibit_interrupt; +#define DEFER_INTS {prohibit_interrupt++;} +#define ALLOW_INTS {prohibit_interrupt--; CHECK_INTS;} +#define ENABLE_INTS {prohibit_interrupt--;} + +extern int trap_pending; +#ifdef THREAD +extern int thread_critical; +#if defined(HAVE_SETITIMER) && !defined(__BOW__) +extern int thread_pending; +void thread_schedule(); +# define CHECK_INTS if (!prohibit_interrupt) {\ + if (trap_pending) rb_trap_exec();\ + if (thread_pending && !thread_critical) thread_schedule();\ +} +# else +/* pseudo preemptive thread switching */ +extern int thread_tick; +#define THREAD_TICK 500 +void thread_schedule(); +# define CHECK_INTS if (!prohibit_interrupt) {\ + if (trap_pending) rb_trap_exec();\ + if (!thread_critical) {\ + if (thread_tick-- <= 0) {\ + thread_tick = THREAD_TICK;\ + thread_schedule();\ + }\ + }\ +} +# endif +#else +# define CHECK_INTS if (!prohibit_interrupt) {\ + if (trap_pending) rb_trap_exec();\ +} +#endif + +#endif |