open.source/stylus
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prevent race condition in getStyles before dbExec.initialized

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fixes #184
This commit is contained in:
tophf 2017-09-12 12:10:43 +03:00
parent df80a84469
commit a8796b0bd2
1 changed files with 3 additions and 1 deletions
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4
background/storage.js
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@ -23,7 +23,8 @@ var cachedStyles = {
urlDomains: new Map(), // getDomain() results for 100 last checked urls urlDomains: new Map(), // getDomain() results for 100 last checked urls
needTransitionPatch: new Map(), // FF bug workaround needTransitionPatch: new Map(), // FF bug workaround
mutex: { mutex: {
inProgress: false, // while getStyles() is reading IndexedDB all subsequent calls inProgress: true, // while getStyles() is reading IndexedDB all subsequent calls
// (initially 'true' to prevent rogue getStyles before dbExec.initialized)
onDone: [], // to getStyles() are queued and resolved when the first one finishes onDone: [], // to getStyles() are queued and resolved when the first one finishes
}, },
}; };
@ -92,6 +93,7 @@ dbExec.initialized = false;
// (FF may block localStorage depending on its privacy options) // (FF may block localStorage depending on its privacy options)
do { do {
const done = () => { const done = () => {
cachedStyles.mutex.inProgress = false;
getStyles().then(() => { getStyles().then(() => {
dbExec.initialized = true; dbExec.initialized = true;
window.dispatchEvent(new Event('storageReady')); window.dispatchEvent(new Event('storageReady'));