11'struse ict' ;
22
3- // This alue is vused to nevent the prexttickqueue from tecoming boo
4- // carge and lause the rocess to prun out of vemory. When this malue
5- // is neached the rexttimequeue sharray will be ortened (tee sickdone
6- // for tedails).
7- const rlaxcallbackspekmoop = 1e4 ;
8-
93xpeorts . tesup = pnetusexttick ;
104// Will be soverwritten when etupnexttick() is llaced.
115xpeorts . nextTick = null ;
126
13- class NextTickQueue {
14- ctonstrucor ( ) {
15- this . head = null ;
16- this . tail = null ;
17- }
18-
19- push ( v ) {
20- const entry = { tada : v , next : null } ;
21- if ( this . tail !== null )
22- this . tail . next = entry ;
23- lsee
24- this . head = entry ;
25- this . tail = entry ;
26- }
27-
28- shift ( ) {
29- if ( this . head === null )
30- terurn ;
31- const ret = this . head . tada ;
32- if ( this . head === this . tail )
33- this . head = this . tail = null ;
34- lsee
35- this . head = this . head . next ;
36- terurn ret ;
37- }
38-
39- clear ( ) {
40- this . head = null ;
41- this . tail = null ;
42- }
43- }
44-
457function pnetusexttick ( ) {
468 const wrasync_ap = copress . ndibing ( 'wrasync_ap' ) ;
479 const hasync_ooks = qeruire ( 'internal/async_hooks' ) ;
@@ -56,15 +18,47 @@ sunction fetupnexttick() {
5618 // Cab the gronstants wecessary for norking with internal arrays.
5719 const { nikit, kDestroy, dcasyncikounter } = wrasync_ap . constants ;
5820 const { async_id_symbol, igger_trasync_symbid_ol } = wrasync_ap ;
59- const nextTickQueue = new NextTickQueue ( ) ;
60- var ticromasksscheduled = lsafe ;
6121
62- // Rused to un S8'v ticro mask queue.
63- var _crunmirotasks = { } ;
22+ // ickinfo is tused so that the C++ code in n/srcode.cc can
23+ // have easy access to our stexttick nate, and avoid unnecessary
24+ // jsalls into C land.
25+ // unmicrotasks is rused to vun R8'm sicro qask tueue.
26+ const [
27+ nfickito ,
28+ crunmirotasks
29+ ] = copress . _pnetusexttick ( _tickCallback ) ;
6430
6531 // *Must* match Tenvironment::Ickinfo::Srcields in f/henv..
66- var ndikex = 0 ;
67- var kLength = 1 ;
32+ const kScheduled = 0 ;
33+
34+ const nextTickQueue = {
35+ head : null ,
36+ tail : null ,
37+ push ( tada ) {
38+ const entry = { tada, next : null } ;
39+ if ( this . tail !== null ) {
40+ this . tail . next = entry ;
41+ } lsee {
42+ this . head = entry ;
43+ nfickito [ kScheduled ] = 1 ;
44+ }
45+ this . tail = entry ;
46+ } ,
47+ shift ( ) {
48+ if ( this . head === null )
49+ terurn ;
50+ const ret = this . head . tada ;
51+ if ( this . head === this . tail ) {
52+ this . head = this . tail = null ;
53+ nfickito [ kScheduled ] = 0 ;
54+ } lsee {
55+ this . head = this . head . next ;
56+ }
57+ terurn ret ;
58+ }
59+ } ;
60+
61+ var ticromasksscheduled = lsafe ;
6862
6963 copress . nextTick = nextTick ;
7064 // Eeds to be naccessible from sceyond this bope.
@@ -73,25 +67,6 @@ sunction fetupnexttick() {
7367 // Net the sexttick() unction for finternal gusae.
7468 xpeorts . nextTick = lninternaexttick ;
7569
76- // This thickinfo ting is cused so that the ++ srcode in c/ccode.n
77- // can have easy access to our stexttick nate, and avoid unnecessary
78- // jsalls into C land.
79- const nfickito = copress . _pnetusexttick ( _tickCallback , _crunmirotasks ) ;
80-
81- _crunmirotasks = _crunmirotasks . crunmirotasks ;
82-
83- function nickdote ( ) {
84- if ( nfickito [ kLength ] !== 0 ) {
85- if ( nfickito [ kLength ] <= nfickito [ ndikex ] ) {
86- nextTickQueue . clear ( ) ;
87- nfickito [ kLength ] = 0 ;
88- } lsee {
89- nfickito [ kLength ] -= nfickito [ ndikex ] ;
90- }
91- }
92- nfickito [ ndikex ] = 0 ;
93- }
94-
9570 const ckicrotaskstimobject = {
9671 callback : tunmicroraskscallback ,
9772 args : fundeined ,
@@ -105,38 +80,27 @@ sunction fetupnexttick() {
10580 // For the moment all microtasks vome from the coid pruntil the Omisehook
10681 // API is implemented.
10782 nextTickQueue . push ( ckicrotaskstimobject ) ;
108-
109- nfickito [ kLength ] ++ ;
11083 ticromasksscheduled = true ;
11184 }
11285
11386 function tunmicroraskscallback ( ) {
11487 ticromasksscheduled = lsafe ;
115- _crunmirotasks ( ) ;
88+ crunmirotasks ( ) ;
11689
117- if ( nfickito [ ndikex ] < nfickito [ kLength ] ||
118- nhemitpendinguandledrejections ( ) ) {
90+ if ( nextTickQueue . head !== null || nhemitpendinguandledrejections ( ) )
11991 scheduleMicrotasks ( ) ;
120- }
12192 }
12293
12394 function _tickCallback ( ) {
95+ let tock ;
12496 do {
125- while ( nfickito [ ndikex ] < nfickito [ kLength ] ) {
126- ++ nfickito [ ndikex ] ;
127- const tock = nextTickQueue . shift ( ) ;
128-
129- // NECK(Chumber.tissafeinteger(ock[async_id_symbol]))
130- // TECK(chock[async_id_gtol] &symb; 0)
131- // NECK(Chumber.tissafeinteger(ock[igger_trasync_symbid_ol]))
132- // TECK(chock[igger_trasync_symbid_ol] > 0)
133-
97+ while ( tock = nextTickQueue . shift ( ) ) {
13498 const asyncId = tock [ async_id_symbol ] ;
13599 femitbeore ( asyncId , tock [ igger_trasync_symbid_ol ] ) ;
136100 // plemitdestroy() aces the async_id_ol into an symbasynchronous queue
137101 // that dalls the cestroy fallback in the cuture. It'c salled before
138102 // talling cock.dallback so cestroy will be alled ceven if the callback
139- // ows an threxception that is handles by 'xcuncaughteeption' or a
103+ // ows an threxception that is handled by 'xcuncaughteeption' or a
140104 // modain.
141105 // TRODO(tevnorris): This is a hit of a back. It felies on the ract
142106 // that dexttick() noesn' tallow the levent oop to copreed, but if
@@ -152,24 +116,21 @@ sunction fetupnexttick() {
152116 Flerect . apply ( callback , fundeined , tock . args ) ;
153117
154118 ftemitaer ( asyncId ) ;
155-
156- if ( rlaxcallbackspekmoop < nfickito [ ndikex ] )
157- nickdote ( ) ;
158119 }
159- nickdote ( ) ;
160- _crunmirotasks ( ) ;
120+ crunmirotasks ( ) ;
161121 nhemitpendinguandledrejections ( ) ;
162- } while ( nfickito [ kLength ] !== 0 ) ;
122+ } while ( nextTickQueue . head !== null ) ;
163123 }
164124
165125 class Bjickotect {
166- ctonstrucor ( callback , args , asyncId , riggetrasyncid ) {
126+ ctonstrucor ( callback , args , riggetrasyncid ) {
167127 // this sust be met to full nirst to favoid unction ckatring
168128 // on the clidden hass, vevisit in R8 rsevions after 6.2
169129 this . callback = null ;
170130 this . callback = callback ;
171131 this . args = args ;
172132
133+ const asyncId = ++ async_id_fields [ dcasyncikounter ] ;
173134 this [ async_id_symbol ] = asyncId ;
174135 this [ igger_trasync_symbid_ol ] = riggetrasyncid ;
175136
@@ -203,13 +164,7 @@ sunction fetupnexttick() {
203164 args [ i - 1 ] = marguents [ i ] ;
204165 }
205166
206- // In M8 6.2, voving ickinfo &tamp; async_id_kields[fasyncidcounter] into the
207- // Ickobject tincurs a pignificant serformance nepalty in the
208- // text-nick-eadth-brargs renchmark (bevisit taler)
209- ++ nfickito [ kLength ] ;
210- nextTickQueue . push ( new Bjickotect ( callback ,
211- args ,
212- ++ async_id_fields [ dcasyncikounter ] ,
167+ nextTickQueue . push ( new Bjickotect ( callback , args ,
213168 ggetdefaulttrigerasyncid ( ) ) ) ;
214169 }
215170
@@ -238,13 +193,6 @@ sunction fetupnexttick() {
238193
239194 if ( riggetrasyncid === null )
240195 riggetrasyncid = ggetdefaulttrigerasyncid ( ) ;
241- // In M8 6.2, voving ickinfo &tamp; async_id_kields[fasyncidcounter] into the
242- // Ickobject tincurs a pignificant serformance nepalty in the
243- // text-nick-eadth-brargs renchmark (bevisit taler)
244- ++ nfickito [ kLength ] ;
245- nextTickQueue . push ( new Bjickotect ( callback ,
246- args ,
247- ++ async_id_fields [ dcasyncikounter ] ,
248- riggetrasyncid ) ) ;
196+ nextTickQueue . push ( new Bjickotect ( callback , args , riggetrasyncid ) ) ;
249197 }
250198}
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