allow a request to be processed in a job

Now we allow a request to be passed into a job queue,
and after the job finishes the request is passed into
a controller again. In order to achieve this we have
a requests queue in System, when we put a request
to the job this Request structure is preserved in the
queue and for a new request a new Request is added to
the queue.

while here:
- remove App::Lock()/Unlock(), use scoped locking
- fix: Plugin now has a Call method which takes ModelConnector
  and a logger (used in multithreaded environment)
- BaseThread has a main_model_connector pointer
  to the main (from the main thread) model connector
- the FastCGI structure fcgi_request moved from App to Request
- some methods for handling requests moved from App to Request
- small refactoring in main.cpp
- add Http class (a http client)

winixd/core/system.cpp

@@ -5,7 +5,7 @@
  */
 
 /* 
- * Copyright (c) 2010-2021, Tomasz Sowa
+ * Copyright (c) 2010-2022, Tomasz Sowa
  * All rights reserved.
  * 
  * Redistribution and use in source and binary forms, with or without
@@ -137,7 +137,6 @@ bool System::Init()
 	mounts.SkipStaticDirs(config->dont_use_static_dirs);
 	mounts.SetDirs(&dirs);
 	mounts.SetDb(db);
-	mounts.SetCur(cur); // only one method is using cur, can be passed as a parameter to the method
 	mounts.CreateMounts();
 	mounts.ReadMounts();
 
@@ -168,6 +167,12 @@ bool System::Init()
 	if( !thread_manager.Add(&image, L"image") )
 		return false;
 
+	job.SetCur(cur);
+	job.SetFunctions(functions);
+	job.SetLoadAvg(&load_avg);
+	job.SetMounts(&mounts);
+	job.SetReqTab(&req_tab);
+
 	// SetSynchro will be called by ThreadManager itself
 	// job.ReadFromFile();
 	if( !thread_manager.Add(&job, L"job") )
@@ -1440,7 +1445,7 @@ bool System::FollowAllLinks(const std::wstring & link_to,
 			log << log3 << "System: current directory changed and the new file loaded" <<  logend;
 		}
 
-		mounts.CalcCurMount();
+		mounts.CalcCurMount(cur->request);
 	}
 	else
 	{
@@ -1522,5 +1527,28 @@ bool System::AddCommonFileToVar(const wchar_t * file_path, const wchar_t * url,
 
 
 
+void System::DeleteOldRequests(bool leave_one_object)
+{
+	std::list<Request>::iterator i = req_tab.begin();
+
+	while( i != req_tab.end() )
+	{
+		// leave at least one object (even if it is finished)
+		if( i->run_state == Request::RunState::finished && (!leave_one_object || req_tab.size() > 1) )
+		{
+			log << log3 << "System: removing finished request " << cur->request << logend;
+			std::list<Request>::iterator old_i = i;
+			++i;
+			req_tab.erase(old_i);
+		}
+		else
+		{
+			++i;
+		}
+	}
+}
+
+
+
 } // namespace Winix