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Add the pause/unpause capability to the opfs-sahpool VFS, as discussed in [forum:fe8cdb8431c|forum thread fe8cdb8431c]. Summary: this gives clients a way to eke some degree of multi-page/tab/Worker concurrency out of this VFS but requires that coordination to be implemented client-side, e.g. via a SharedWorker or WebLocks.

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FossilOrigin-Name: b5dbd521951e129b4dec69f191a872500dbf387b34a8479ad58b053ffcccbab9
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stephan
2025-02-20 04:14:26 +00:00
parent f8a9f45595 cee7609074
commit a32ea731a0
10 changed files with 483 additions and 38 deletions
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19
ext/wasm/tester1.c-pp.js
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@ -3189,8 +3189,25 @@ globalThis.sqlite3InitModule = sqlite3InitModule;
db.close();
T.assert(1 === u1.getFileCount());
db = new u2.OpfsSAHPoolDb(dbName);
T.assert(1 === u1.getFileCount());
T.assert(1 === u1.getFileCount())
.mustThrowMatching(
()=>u1.pauseVfs(),
(err)=>{
return capi.SQLITE_MISUSE===err.resultCode
&& /^SQLITE_MISUSE: Cannot pause VFS /.test(err.message);
},
"Cannot pause VFS with opened db."
);
db.close();
T.assert( u2===u2.pauseVfs() )
.assert( u2.isPaused() )
.assert( 0===capi.sqlite3_vfs_find(u2.vfsName) )
.mustThrowMatching(()=>new u2.OpfsSAHPoolDb(dbName),
/.+no such vfs: .+/,
"VFS is not available")
.assert( u2===await u2.unpauseVfs() )
.assert( u2===await u1.unpauseVfs(), "unpause is a no-op if the VFS is not paused" )
.assert( 0!==capi.sqlite3_vfs_find(u2.vfsName) );
const fileNames = u1.getFileNames();
T.assert(1 === fileNames.length)
.assert(dbName === fileNames[0])