From 483eb2f56657e8e7f419ab1a4fab8dce9ade8609 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 27 Apr 2024 20:24:20 +0200
Subject: Adding upstream version 14.2.21.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/boost/libs/thread/example/starvephil.cpp | 187 +++++++++++++++++++++++++++
 1 file changed, 187 insertions(+)
 create mode 100644 src/boost/libs/thread/example/starvephil.cpp

(limited to 'src/boost/libs/thread/example/starvephil.cpp')

diff --git a/src/boost/libs/thread/example/starvephil.cpp b/src/boost/libs/thread/example/starvephil.cpp
new file mode 100644
index 00000000..467d0b3c
--- /dev/null
+++ b/src/boost/libs/thread/example/starvephil.cpp
@@ -0,0 +1,187 @@
+// Copyright (C) 2001-2003
+// William E. Kempf
+//
+//  Distributed under the Boost Software License, Version 1.0. (See accompanying
+//  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#define BOOST_THREAD_VERSION 2
+
+#include <boost/thread/mutex.hpp>
+#include <boost/thread/condition.hpp>
+#include <boost/thread/thread_only.hpp>
+#include <boost/thread/xtime.hpp>
+#include <iostream>
+#include <time.h>
+
+namespace
+{
+boost::mutex iomx;
+} // namespace
+
+class canteen
+{
+public:
+    canteen() : m_chickens(0) { }
+
+    void get(int id)
+    {
+        boost::unique_lock<boost::mutex> lock(m_mutex);
+        while (m_chickens == 0)
+        {
+            {
+                boost::unique_lock<boost::mutex> lk(iomx);
+                std::cout << "(" << clock() << ") Phil" << id <<
+                    ": wot, no chickens?  I'll WAIT ..." << std::endl;
+            }
+            m_condition.wait(lock);
+        }
+        {
+            boost::unique_lock<boost::mutex> lk(iomx);
+            std::cout << "(" << clock() << ") Phil" << id <<
+                ": those chickens look good ... one please ..." << std::endl;
+        }
+        m_chickens--;
+    }
+    void put(int value)
+    {
+        boost::unique_lock<boost::mutex> lock(m_mutex);
+        {
+            boost::unique_lock<boost::mutex> lk(iomx);
+            std::cout << "(" << clock()
+                      << ") Chef: ouch ... make room ... this dish is "
+                      << "very hot ..." << std::endl;
+        }
+        boost::xtime xt;
+        boost::xtime_get(&xt, boost::TIME_UTC_);
+        xt.sec += 3;
+        boost::thread::sleep(xt);
+        m_chickens += value;
+        {
+            boost::unique_lock<boost::mutex> lk(iomx);
+            std::cout << "(" << clock() <<
+                ") Chef: more chickens ... " << m_chickens <<
+                " now available ... NOTIFYING ..." << std::endl;
+        }
+        m_condition.notify_all();
+    }
+
+private:
+    boost::mutex m_mutex;
+    boost::condition m_condition;
+    int m_chickens;
+};
+
+canteen g_canteen;
+
+void chef()
+{
+    const int chickens = 4;
+    {
+        boost::unique_lock<boost::mutex> lock(iomx);
+        std::cout << "(" << clock() << ") Chef: starting ..." << std::endl;
+    }
+    for (;;)
+    {
+        {
+            boost::unique_lock<boost::mutex> lock(iomx);
+            std::cout << "(" << clock() << ") Chef: cooking ..." << std::endl;
+        }
+        boost::xtime xt;
+        boost::xtime_get(&xt, boost::TIME_UTC_);
+        xt.sec += 2;
+        boost::thread::sleep(xt);
+        {
+            boost::unique_lock<boost::mutex> lock(iomx);
+            std::cout << "(" << clock() << ") Chef: " << chickens
+                      << " chickens, ready-to-go ..." << std::endl;
+        }
+        g_canteen.put(chickens);
+    }
+}
+
+struct phil
+{
+    phil(int id) : m_id(id) { }
+    void run() {
+        {
+            boost::unique_lock<boost::mutex> lock(iomx);
+            std::cout << "(" << clock() << ") Phil" << m_id
+                      << ": starting ..." << std::endl;
+        }
+        for (;;)
+        {
+            if (m_id > 0)
+            {
+                boost::xtime xt;
+                boost::xtime_get(&xt, boost::TIME_UTC_);
+                xt.sec += 3;
+                boost::thread::sleep(xt);
+            }
+            {
+                boost::unique_lock<boost::mutex> lk(iomx);
+                std::cout << "(" << clock() << ") Phil" << m_id
+                          << ": gotta eat ..." << std::endl;
+            }
+            g_canteen.get(m_id);
+            {
+                boost::unique_lock<boost::mutex> lk(iomx);
+                std::cout << "(" << clock() << ") Phil" << m_id
+                          << ": mmm ... that's good ..." << std::endl;
+            }
+        }
+    }
+    static void do_thread(void* param) {
+        static_cast<phil*>(param)->run();
+    }
+
+    int m_id;
+};
+
+struct thread_adapt
+{
+    thread_adapt(void (*func)(void*), void* param)
+        : _func(func), _param(param)
+    {
+    }
+    int operator()() const
+    {
+        _func(_param);
+        return 0;
+    }
+
+    void (*_func)(void*);
+    void* _param;
+};
+
+class thread_adapter
+{
+public:
+    thread_adapter(void (*func)(void*), void* param)
+        : _func(func), _param(param)
+    {
+    }
+    void operator()() const { _func(_param); }
+private:
+    void (*_func)(void*);
+    void* _param;
+};
+
+int main()
+{
+    boost::thread thrd_chef(&chef);
+    phil p[] = { phil(0), phil(1), phil(2), phil(3), phil(4) };
+    boost::thread thrd_phil0(thread_adapter(&phil::do_thread, &p[0]));
+    boost::thread thrd_phil1(thread_adapter(&phil::do_thread, &p[1]));
+    boost::thread thrd_phil2(thread_adapter(&phil::do_thread, &p[2]));
+    boost::thread thrd_phil3(thread_adapter(&phil::do_thread, &p[3]));
+    boost::thread thrd_phil4(thread_adapter(&phil::do_thread, &p[4]));
+
+    thrd_chef.join();
+    thrd_phil0.join();
+    thrd_phil1.join();
+    thrd_phil2.join();
+    thrd_phil3.join();
+    thrd_phil4.join();
+
+    return 0;
+}
-- 
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