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Shorter spinner delay after previous spinful event.

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This commit is contained in:
Dan Haffey 2016-02-20 14:35:06 -08:00
parent eea4758290
commit 26144fedde
2 changed files with 25 additions and 5 deletions
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1
include/vere/vere.h
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@ -258,6 +258,7 @@
uv_thread_t* sit_u; // spinner thread
c3_o diz_o; // spinner activated
c3_d eve_d; // spinner start tick (unix μs)
c3_d end_d; // spinner end tick (unix μs)
c3_c* why_c; // spinner event wire (root only)
} sun;

29
vere/term.c
View File

@ -37,8 +37,10 @@ static void _tel_opt(telnet_nvt*, telnet_byte, telnet_telopt_event*);
#define _T_CTIM 3 // suppress GA/char-at-a-time
#define _T_NAWS 31 // negotiate about window size
#define _SPIN_WAIT_US 500000 // spinner activation delay
#define _SPIN_COOL_US 500000 // spinner activation delay when cool
#define _SPIN_WARM_US 50000 // spinner activation delay when warm
#define _SPIN_RATE_US 250000 // spinner rate (microseconds/frame)
#define _SPIN_IDLE_US 500000 // spinner cools down if stopped this long
/* _term_msc_out_host(): unix microseconds from current host time.
*/
@ -423,7 +425,7 @@ u3_term_io_exit(void)
uv_mutex_unlock(&uty_u->tat_u.mex_u);
// XX can block exit waiting for wakeup (max _SPIN_WAIT_US)
// XX can block exit waiting for wakeup (max _SPIN_COOL_US)
c3_w ret_w;
if ( 0 != (ret_w = uv_thread_join(sit_u)) ) {
uL(fprintf(uH, "term: spinner exit: %s\n", uv_strerror(ret_w)));
@ -1064,7 +1066,19 @@ _term_start_spinner(u3_utty* uty_u, u3_noun ovo)
{
uty_u->tat_u.sun.diz_o = c3n;
c3_d lag_d = _SPIN_WAIT_US;
c3_d now_d = _term_msc_out_host();
// If we receive an event shortly after a previous spin, use a shorter delay
// to avoid giving the impression of a half-idle system.
//
c3_d lag_d;
if ( now_d - uty_u->tat_u.sun.end_d < _SPIN_IDLE_US ) {
lag_d = _SPIN_WARM_US;
}
else {
lag_d = _SPIN_COOL_US;
}
u3_noun why = u3h(u3t(u3h(u3t(ovo))));
if ( c3__term == why ) {
u3_noun eve = u3t(u3t(ovo));
@ -1076,7 +1090,7 @@ _term_start_spinner(u3_utty* uty_u, u3_noun ovo)
uty_u->tat_u.sun.why_c = (c3_c*)u3r_string(why);
}
uty_u->tat_u.sun.eve_d = _term_msc_out_host() + lag_d;
uty_u->tat_u.sun.eve_d = now_d + lag_d;
uv_mutex_unlock(&uty_u->tat_u.mex_u);
}
@ -1090,6 +1104,10 @@ _term_stop_spinner(u3_utty* uty_u)
if ( c3y == uty_u->tat_u.sun.diz_o ) {
_term_it_refresh_line(uty_u);
uty_u->tat_u.sun.end_d = _term_msc_out_host();
}
else {
uty_u->tat_u.sun.end_d = 0;
}
uty_u->tat_u.sun.diz_o = c3n;
@ -1120,8 +1138,9 @@ _term_spinner_cb(void* ptr_v)
c3_d eve_d = uty_u->tat_u.sun.eve_d;
if ( 0 == eve_d ) {
c3_o diz_o = uty_u->tat_u.sun.diz_o;
uv_mutex_unlock(&uty_u->tat_u.mex_u);
usleep(_SPIN_WAIT_US);
usleep(c3y == diz_o ? _SPIN_WARM_US : _SPIN_COOL_US);
}
else {
c3_d now_d = _term_msc_out_host();