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re-run scheduler if only thread was still waiting (issue #594)

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Alex Shinn 2019-12-26 23:42:15 +08:00
parent 588d63d901
commit 3c8402d4fb
2 changed files with 11 additions and 4 deletions
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11
lib/srfi/18/threads.c
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@ -421,7 +421,7 @@ sexp sexp_scheduler (sexp ctx, sexp self, sexp_sint_t n, sexp root_thread) {
int i, k; int i, k;
struct timeval tval; struct timeval tval;
struct pollfd *pfds; struct pollfd *pfds;
useconds_t usecs = 0; suseconds_t usecs = 0;
sexp res, ls1, ls2, evt, runner, paused, front, pollfds; sexp res, ls1, ls2, evt, runner, paused, front, pollfds;
sexp_gc_var1(tmp); sexp_gc_var1(tmp);
sexp_gc_preserve1(ctx, tmp); sexp_gc_preserve1(ctx, tmp);
@ -618,12 +618,15 @@ sexp sexp_scheduler (sexp ctx, sexp self, sexp_sint_t n, sexp root_thread) {
if (tval.tv_usec < sexp_context_timeval(res).tv_usec || usecs > 0) if (tval.tv_usec < sexp_context_timeval(res).tv_usec || usecs > 0)
usecs += sexp_context_timeval(res).tv_usec - tval.tv_usec; usecs += sexp_context_timeval(res).tv_usec - tval.tv_usec;
} }
if (usecs > 10*1000) usecs = 10*1000; if (usecs > 10*1000) {
usecs = 10*1000;
} else {
sexp_context_waitp(res) = 0;
sexp_context_timeoutp(res) = 1;
}
} }
/* take a nap to avoid busy looping */ /* take a nap to avoid busy looping */
usleep(usecs); usleep(usecs);
sexp_context_waitp(res) = 0;
sexp_context_timeoutp(res) = 1;
} }
sexp_gc_release1(ctx); sexp_gc_release1(ctx);

4
vm.c
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@ -1066,6 +1066,10 @@ sexp sexp_apply (sexp ctx, sexp proc, sexp args) {
} }
fuel = sexp_context_refuel(ctx); fuel = sexp_context_refuel(ctx);
if (fuel <= 0) goto end_loop; if (fuel <= 0) goto end_loop;
if (sexp_context_waitp(ctx)) {
fuel = 1;
goto loop; /* we were still waiting, try again */
}
} }
#endif #endif
#if SEXP_USE_DEBUG_VM #if SEXP_USE_DEBUG_VM