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minor fix...

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Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
This commit is contained in:
Alex A. Naanou 2022-10-22 12:45:52 +03:00
parent 095da4eb5b
commit a5b618ab8c
1 changed files with 16 additions and 7 deletions
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23
pwiki/store/base.js
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@ -65,6 +65,9 @@ var pwpath = require('../path')
// -> <data> // -> <data>
// -> <promise> // -> <promise>
// //
// NOTE: when a getter is pending (promise), all consecutive calls will
// resolve the original getter return value...
//
// //
// //
// Special methods: // Special methods:
@ -95,6 +98,9 @@ var pwpath = require('../path')
// Modification time... // Modification time...
// .__<name>_modified // .__<name>_modified
// //
// Pending generator promise...
// .__<name>_promise
//
// //
// Options format: // Options format:
// { // {
@ -143,6 +149,7 @@ function(name, generate, options={}){
var merge = `__${name}_merge__` var merge = `__${name}_merge__`
var special = `__${name}__` var special = `__${name}__`
var modified = `__${name}_modified` var modified = `__${name}_modified`
var promise = `__${name}_promise`
// set modified time... // set modified time...
var _stamp = function(that, res){ var _stamp = function(that, res){
@ -160,17 +167,19 @@ function(name, generate, options={}){
var _smake = function(that){ var _smake = function(that){
return _stamp(that, _make(that)) } return _stamp(that, _make(that)) }
// unwrap a promised value into cache... // unwrap a promised value into cache...
var promise = `__${name}_promise`
var _await = function(obj, val){ var _await = function(obj, val){
if(val instanceof Promise){ if(val instanceof Promise){
// NOTE: this avoids a race condition when a getter is called // NOTE: this avoids a race condition when a getter is called
// while a previous getter is still pending... // while a previous getter is still pending...
val = obj[promise] = if(obj[promise] == null){
obj[promise] obj[promise] = val
?? val val.then(
val.then(function(value){ function(value){
delete obj[promise] delete obj[promise]
obj[cache] = value }) } obj[cache] = value },
function(){
delete obj[promise] }) }
val = obj[promise] }
return val } return val }
// build the method... // build the method...