First stab at Playground Blueprints

Author: adamziel

packages/php-wasm/common/src/lib/index.ts

@@ -17,10 +17,12 @@ export type {
 	WithPHPIniBindings,
 } from './php';
 
+import Semaphore from './semaphore';
+export { Semaphore };
+
 export { jsToPHPTranslator } from './js-to-php-translator';
 export type { PHPResponse } from './php-response';
 export type { ErrnoError } from './rethrow-file-system-error';
-
 export {
 	LatestSupportedPHPVersion,
 	SupportedPHPVersions,

packages/php-wasm/common/src/lib/semaphore.ts

@@ -34,4 +34,14 @@ export default class Semaphore {
 			}
 		}
 	}
+
+	async run<T>(fn: () => Promise<T>): Promise<T> {
+		const release = await this.acquire();
+		try {
+			return await fn();
+		} finally {
+			release();
+		}
+	}
+	
 }

packages/php-wasm/web/src/index.ts

@@ -6,6 +6,7 @@ export {
 	PHPBrowser,
 	exposeAPI,
 	consumeAPI,
+	Semaphore,
 	jsToPHPTranslator,
 	SupportedPHPVersions,
 	SupportedPHPVersionsList,