From 5068d34c08f951a7ea6257d305a1627b09a95817 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 4 May 2024 19:44:55 +0200
Subject: Adding upstream version 0.11.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/base/isc.cc | 147 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 147 insertions(+)
 create mode 100644 src/base/isc.cc

(limited to 'src/base/isc.cc')

diff --git a/src/base/isc.cc b/src/base/isc.cc
new file mode 100644
index 0000000..7dbce11
--- /dev/null
+++ b/src/base/isc.cc
@@ -0,0 +1,147 @@
+/**
+ * Copyright (c) 2021, Timothy Stack
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * * Neither the name of Timothy Stack nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * @file isc.cc
+ */
+
+#include <algorithm>
+
+#include "isc.hh"
+
+#include "config.h"
+
+namespace isc {
+
+void
+service_base::start()
+{
+    log_debug("starting service thread for: %s", this->s_name.c_str());
+    this->s_thread = std::thread(&service_base::run, this);
+    this->s_started = true;
+}
+
+void*
+service_base::run()
+{
+    log_info("BEGIN isc thread: %s", this->s_name.c_str());
+    while (this->s_looping) {
+        mstime_t current_time = getmstime();
+        auto timeout = this->compute_timeout(current_time);
+
+        this->s_port.process_for(timeout);
+        this->s_children.cleanup_children();
+
+        try {
+            this->loop_body();
+        } catch (const std::exception& e) {
+            log_error("%s: loop_body() failed with -- %s",
+                      this->s_name.c_str(),
+                      e.what());
+            this->s_looping = false;
+        } catch (...) {
+            log_error("%s: loop_body() failed with non-standard exception",
+                      this->s_name.c_str());
+            this->s_looping = false;
+        }
+    }
+    if (!this->s_children.empty()) {
+        log_debug("stopping children of service: %s", this->s_name.c_str());
+        this->s_children.stop_children();
+    }
+    this->stopped();
+    log_info("END isc thread: %s", this->s_name.c_str());
+
+    return nullptr;
+}
+
+void
+service_base::stop()
+{
+    if (this->s_started) {
+        log_debug("stopping service thread: %s", this->s_name.c_str());
+        if (this->s_looping) {
+            this->s_looping = false;
+            this->s_port.send(empty_msg());
+        }
+        log_debug("waiting for service thread: %s", this->s_name.c_str());
+        this->s_thread.join();
+        log_debug("joined service thread: %s", this->s_name.c_str());
+        this->s_started = false;
+    }
+}
+
+supervisor::supervisor(service_list servs, service_base* parent)
+    : s_service_list(std::move(servs)), s_parent(parent)
+{
+    for (auto& serv : this->s_service_list) {
+        serv->start();
+    }
+}
+
+supervisor::~supervisor()
+{
+    this->stop_children();
+}
+
+void
+supervisor::stop_children()
+{
+    for (auto& serv : this->s_service_list) {
+        serv->stop();
+    }
+    this->cleanup_children();
+}
+
+void
+supervisor::cleanup_children()
+{
+    this->s_service_list.erase(
+        std::remove_if(this->s_service_list.begin(),
+                       this->s_service_list.end(),
+                       [this](auto& child) {
+                           if (child->is_looping()) {
+                               return false;
+                           }
+
+                           child->stop();
+                           if (this->s_parent != nullptr) {
+                               this->s_parent->child_finished(child);
+                           }
+                           return true;
+                       }),
+        this->s_service_list.end());
+}
+
+void
+supervisor::add_child_service(std::shared_ptr<service_base> new_service)
+{
+    this->s_service_list.emplace_back(new_service);
+    new_service->start();
+}
+
+}  // namespace isc
-- 
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