From d3a10d7190637029c110b1a6209fbe8783cbdd64 Mon Sep 17 00:00:00 2001
From: Vincent Batts <vbatts@hashbangbash.com>
Date: Sat, 8 Feb 2025 19:56:52 -0500
Subject: [PATCH] *: adding a threaded worker example

Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
---
 account.h   |  3 +++
 main.cpp    |  4 ++++
 meson.build |  6 +++++-
 worker.cpp  | 32 ++++++++++++++++++++++++++++++++
 4 files changed, 44 insertions(+), 1 deletion(-)
 create mode 100644 worker.cpp

diff --git a/account.h b/account.h
index 011960a..5631f7c 100644
--- a/account.h
+++ b/account.h
@@ -1,4 +1,6 @@
 
+#ifndef ACCOUNT_H
+#define ACCOUNT_H
 /*
  * =====================================================================================
  *        Class:  Account
@@ -39,3 +41,4 @@ class Account
 
 }; /* -----  end of class Account  ----- */
 
+#endif
diff --git a/main.cpp b/main.cpp
index 73caee6..204e693 100644
--- a/main.cpp
+++ b/main.cpp
@@ -25,5 +25,9 @@ using namespace std;
 
 int main(int argc, char* argv[]) {
 	Account	account(0.0);
+	account.deposit(100.5); // Add some money
+	account.deposit(50.25); // Add more money
+	std::cout << "Current Balance: " << account.getBalance() << std::endl;
+
 	return EXIT_SUCCESS;
 }
diff --git a/meson.build b/meson.build
index 27c1cb6..aa78d8f 100644
--- a/meson.build
+++ b/meson.build
@@ -8,5 +8,9 @@ a = run_command('date', check: true)
 read_exe = executable('read', 'read.c', link_language : 'c',)
 readpp_exe = executable('read++', 'read++.cpp')
 
+worker_exe = executable('worker', 'worker.cpp')
+
 account_sources = ['main.cpp', 'account.cpp', 'account.h']
-account_exe = executable('account', account_sources)
+account_exe = executable('account', account_sources,
+  cpp_args: ['-std=c++23'],
+  )
diff --git a/worker.cpp b/worker.cpp
new file mode 100644
index 0000000..19ecbb9
--- /dev/null
+++ b/worker.cpp
@@ -0,0 +1,32 @@
+#include <iostream>
+#include <thread>
+#include <condition_variable>
+#include <mutex>
+
+// https://en.cppreference.com/w/cpp/thread/thread
+// https://en.cppreference.com/w/cpp/thread/mutex
+// https://en.cppreference.com/w/cpp/thread/condition_variable
+
+std::mutex mtx;
+std::condition_variable cv;
+bool ready = false;
+
+void worker() {
+    std::unique_lock<std::mutex> lock(mtx);
+    cv.wait(lock, [] { return ready; }); // Wait until 'ready' is set to true
+    std::cout << "Daemon process woke up!" << std::endl;
+}
+
+int main() {
+    std::thread daemon(worker);
+
+    std::this_thread::sleep_for(std::chrono::seconds(5));
+    {
+        std::lock_guard<std::mutex> lock(mtx);
+        ready = true;
+    }
+    cv.notify_one();
+
+    daemon.join();
+    return 0;
+}