From ab4d54cc85c0135db600506f30c7a5480a8f8bcb Mon Sep 17 00:00:00 2001
From: Book Pauk <bookpauk@gmail.com>
Date: Sun, 23 Oct 2022 18:01:20 +0700
Subject: [PATCH] =?UTF-8?q?=D0=94=D0=BE=D0=B1=D0=B0=D0=B2=D0=BB=D0=B5?=
 =?UTF-8?q?=D0=BD=D0=B0=20=D0=B2=D0=BE=D0=B7=D0=BC=D0=BE=D0=B6=D0=BD=D0=BE?=
 =?UTF-8?q?=D1=81=D1=82=D1=8C=20=D0=B8=D1=81=D0=BF=D0=BE=D0=BB=D1=8C=D0=B7?=
 =?UTF-8?q?=D0=BE=D0=B2=D0=B0=D0=BD=D0=B8=D1=8F=20HeavyCalc=20=D0=BA=D0=B0?=
 =?UTF-8?q?=D0=BA=20singleton?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 server/core/HeavyCalc.js | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/server/core/HeavyCalc.js b/server/core/HeavyCalc.js
index a12f31e..2c08891 100644
--- a/server/core/HeavyCalc.js
+++ b/server/core/HeavyCalc.js
@@ -86,10 +86,17 @@ class CalcThread {
     }
 }
 
+//singleton
+let instance = null;
+
 class HeavyCalc {
     constructor(opts = {}) {
+        const singleton = opts.singleton || false;
+
+        if (singleton && instance)
+            return instance;
+
         this.threads = opts.threads || 1;
-        this.singleton = opts.singleton || false;
         this.terminated = false;
 
         this.workers = [];
@@ -99,6 +106,10 @@ class HeavyCalc {
             this.workers.push(worker);
             this.load.push(0);
         }
+
+        if (singleton) {
+            instance = this;
+        }
     }
 
     async run(params) {