From 599c3e54dc17015690955d8333f970cb9cf243d3 Mon Sep 17 00:00:00 2001
From: heck <heck@pep.foundation>
Date: Tue, 8 Jun 2021 22:31:31 +0200
Subject: [PATCH] Test: PityTest - Add fs_mutex (a very primitive IPC sync
 method)

---
 src/PityUnit.hh  | 11 ++++++-----
 src/PityUnit.hxx | 17 ++++++++---------
 src/fs_mutex.cc  | 41 +++++++++++++++++++++++++++++++++++++++++
 src/fs_mutex.hh  | 25 +++++++++++++++++++++++++
 4 files changed, 80 insertions(+), 14 deletions(-)
 create mode 100644 src/fs_mutex.cc
 create mode 100644 src/fs_mutex.hh

diff --git a/src/PityUnit.hh b/src/PityUnit.hh
index 0aeb316..3bccaed 100644
--- a/src/PityUnit.hh
+++ b/src/PityUnit.hh
@@ -4,10 +4,12 @@
 #ifndef PITYTEST_PITYUNIT_HH
 #define PITYTEST_PITYUNIT_HH
 
-#include <string>
-#include <map>
 #include "../../../src/pEpLog.hh"
 #include "../../../src/std_utils.hh"
+#include <string>
+#include <map>
+#include <memory>
+#include "fs_mutex.hh"
 
 // Yes, the mem mgmt is purely static on purpose (so far)
 
@@ -49,7 +51,7 @@ namespace pEp {
 
 
             // Main funcs
-            void run() const;
+            void run();
             std::string to_string(bool recursive = true, int indent = 0) const;
             static std::string to_string(const ExecutionMode& emode);
 
@@ -106,17 +108,16 @@ namespace pEp {
             int procUnitNr;
             static int procUnitsCount; // will be increased in everuy constructor
 
+            std::shared_ptr<fs_mutex> _log_mutex = nullptr;
             // internal logging
             Adapter::pEpLog::pEpLogger& m4gic_logger_n4me = logger_debug;
         };
 
-
         class PityAssertException : public std::runtime_error {
         public:
             PityAssertException(const std::string& string) : runtime_error(string) {}
         };
 
-
 #ifndef PTASSERT
     #define PTASSERT(condition)                                                                    \
         do {                                                                                       \
diff --git a/src/PityUnit.hxx b/src/PityUnit.hxx
index 10e44b3..c0307de 100644
--- a/src/PityUnit.hxx
+++ b/src/PityUnit.hxx
@@ -13,6 +13,7 @@
 #include <algorithm>
 #include <sstream>
 #include <exception>
+#include <memory>
 
 //using namespace pEp::Adapter::pEpLog;
 
@@ -161,10 +162,12 @@ namespace pEp {
         }
 
         template<class T>
-        void PityUnit<T>::run() const
+        void PityUnit<T>::run()
         {
             pEpLogClass("called");
-            // caller is never nullptr if called by another PityUnit
+            _log_mutex = std::make_shared<fs_mutex>("fds");
+            _log_mutex->release();
+
             if (_isRootUnit()) {
                 _init();
             }
@@ -285,11 +288,6 @@ namespace pEp {
             logH3("INIT");
             Utils::dir_ensure(getGlobalRootDir());
             recreateDirsRecursively();
-            //            if (!_children.empty()) {
-            //                for (const std::pair<std::string, PityUnit<T>&> child : _children) {
-            //                    _recreateDir(child.second.processDir());
-            //                }
-            //            }
             logH3("INIT DONE");
         }
 
@@ -311,8 +309,7 @@ namespace pEp {
                     logH3(_status_string("\033[1m\033[32mSUCCESS" + Utils::to_termcol(_termColor())));
                 } catch (const std::exception& e) {
                     logRaw("reason: " + std::string(e.what()));
-                    logH3(_status_string("\033[1m\033[31mFAILED" + Utils::to_termcol(_termColor())
-                                         ));
+                    logH3(_status_string("\033[1m\033[31mFAILED" + Utils::to_termcol(_termColor())));
                 }
             } else {
                 logRaw("No function to execute");
@@ -464,7 +461,9 @@ namespace pEp {
         template<class T>
         void PityUnit<T>::logRaw(const std::string& msg) const
         {
+            _log_mutex->aquire();
             Adapter::pEpLog::log(msg, _termColor());
+            _log_mutex->release();
         }
 
 
diff --git a/src/fs_mutex.cc b/src/fs_mutex.cc
new file mode 100644
index 0000000..ede8b6d
--- /dev/null
+++ b/src/fs_mutex.cc
@@ -0,0 +1,41 @@
+#include "fs_mutex.hh"
+#include "../../../src/std_utils.hh"
+#include<fstream>
+
+
+namespace pEp {
+    namespace PityTest11 {
+        fs_mutex::fs_mutex(std::string mutexpath) : mutexpath{ mutexpath } {}
+
+        void fs_mutex::aquire() const
+        {
+            if (mutexpath.empty()) {
+                throw std::runtime_error("no mutexpath set");
+            } else {
+                std::string mutex_file = mutexpath;
+                while (Utils::path_exists(mutex_file)) {
+                    Utils::sleep_millis(5);
+                }
+                std::ofstream msgfile = Utils::file_create(mutexpath);
+            }
+        }
+
+        void fs_mutex::release() const
+        {
+            if (mutexpath.empty()) {
+                throw std::runtime_error("no mutexpath set");
+            } else {
+
+                try {
+                    Utils::path_delete(mutexpath);
+                    // Give others a chance to pickup
+                    Utils::sleep_millis(100);
+                } catch (...) {
+                    //                    pEpLogClass("Error releasing fsmutex");
+                }
+            }
+        }
+
+    } // namespace PityTest
+} // namespace pEp
+
diff --git a/src/fs_mutex.hh b/src/fs_mutex.hh
new file mode 100644
index 0000000..a71e394
--- /dev/null
+++ b/src/fs_mutex.hh
@@ -0,0 +1,25 @@
+#ifndef FS_MUTEX
+#define FS_MUTEX
+
+#include <iostream>
+
+namespace pEp {
+    namespace PityTest11 {
+        // a very primitive IPC sync method
+        // also unreliable
+        // but good enough for what i just needed it for
+        class fs_mutex {
+        public:
+            fs_mutex() = delete;
+            fs_mutex(std::string mutexpath);
+
+            void aquire() const;
+            void release() const;
+
+        private:
+            const std::string mutexpath;
+        };
+    } // namespace PityTest11
+} // namespace pEp
+
+#endif // FS_MUTEX
\ No newline at end of file