Thread pool wait is now const

Author: COM8

cpr/threadpool.cpp

@@ -78,7 +78,7 @@ void ThreadPool::Stop() {
     }
 }
 
-void ThreadPool::Wait() {
+void ThreadPool::Wait() const {
     while (true) {
         if ((state != State::RUNNING && curThreadCount <= 0) || (tasks.empty() && curThreadCount <= idleThreadCount)) {
             break;

include/cpr/threadpool.h

@@ -169,7 +169,7 @@ class ThreadPool {
     /**
      * Returns as soon as the task queue is empty and all threads are either stopped/joined or in idel state.
      **/
-    void Wait();
+    void Wait() const;
 
     /**
      * Enqueues a new task to the thread pool.