fix(core): update

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@pushrocks/lik',
-  version: '6.0.0',
+  version: '6.0.1',
   description: 'light little helpers for node'
 }

ts/index.ts

@@ -1,3 +1,4 @@
+export * from './lik.asyncexecutionstack.js'
 export * from './lik.fastmap.js';
 export * from './lik.interestmap.js';
 export * from './lik.interestmap.interest.js';

ts/lik.asyncexecutionstack.ts

@@ -0,0 +1,25 @@
+import * as plugins from './lik.plugins.js'
+
+/**
+ * allows for avoiding race condition
+ */
+export class AsyncExecutionStack {
+  public currentExecutions: Promise<any>[] = [];
+  public async getExclusiveExecutionSlot(funcArg: () => Promise<any>, timeoutArg: number) {
+    const executionDeferred = plugins.smartpromise.defer();
+    this.currentExecutions.push(executionDeferred.promise);
+    for (const promiseArg of this.currentExecutions) {
+      if (promiseArg !== executionDeferred.promise) {
+        await promiseArg;
+      } else {
+        if (timeoutArg) {
+          await Promise.race([funcArg(),plugins.smartdelay.delayFor(timeoutArg)])
+        } else {
+          await funcArg();
+        }
+        executionDeferred.resolve();
+        this.currentExecutions.shift();
+      }
+    }
+  };
+}