diff options
Diffstat (limited to 'chromium/third_party/sqlite/src/ext/wasm/api/sqlite3-worker1.c-pp.js')
-rw-r--r-- | chromium/third_party/sqlite/src/ext/wasm/api/sqlite3-worker1.c-pp.js | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/chromium/third_party/sqlite/src/ext/wasm/api/sqlite3-worker1.c-pp.js b/chromium/third_party/sqlite/src/ext/wasm/api/sqlite3-worker1.c-pp.js new file mode 100644 index 00000000000..9e9c3ac426b --- /dev/null +++ b/chromium/third_party/sqlite/src/ext/wasm/api/sqlite3-worker1.c-pp.js @@ -0,0 +1,50 @@ +/* + 2022-05-23 + + The author disclaims copyright to this source code. In place of a + legal notice, here is a blessing: + + * May you do good and not evil. + * May you find forgiveness for yourself and forgive others. + * May you share freely, never taking more than you give. + + *********************************************************************** + + This is a JS Worker file for the main sqlite3 api. It loads + sqlite3.js, initializes the module, and postMessage()'s a message + after the module is initialized: + + {type: 'sqlite3-api', result: 'worker1-ready'} + + This seemingly superfluous level of indirection is necessary when + loading sqlite3.js via a Worker. Instantiating a worker with new + Worker("sqlite.js") will not (cannot) call sqlite3InitModule() to + initialize the module due to a timing/order-of-operations conflict + (and that symbol is not exported in a way that a Worker loading it + that way can see it). Thus JS code wanting to load the sqlite3 + Worker-specific API needs to pass _this_ file (or equivalent) to the + Worker constructor and then listen for an event in the form shown + above in order to know when the module has completed initialization. + + This file accepts a URL arguments to adjust how it loads sqlite3.js: + + - `sqlite3.dir`, if set, treats the given directory name as the + directory from which `sqlite3.js` will be loaded. +*/ +"use strict"; +(()=>{ +//#if target=es6-bundler-friendly + importScripts('sqlite3.js'); +//#else + const urlParams = new URL(self.location.href).searchParams; + let theJs = 'sqlite3.js'; + if(urlParams.has('sqlite3.dir')){ + theJs = urlParams.get('sqlite3.dir') + '/' + theJs; + } + //console.warn("worker1 theJs =",theJs); + importScripts(theJs); +//#endif + sqlite3InitModule().then((sqlite3)=>{ + sqlite3.initWorker1API(); + }); +})(); |