From fcaafa0d12075df1d9bf0e554d6de0085bdce3e1 Mon Sep 17 00:00:00 2001
From: aaronhance <ah@aaronhance.me>
Date: Wed, 28 Sep 2022 16:04:51 +0100
Subject: [PATCH] Started aadding file handle stuff to volume manager

---
 src/driver/storage/volumemanager.pas | 60 ++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)

diff --git a/src/driver/storage/volumemanager.pas b/src/driver/storage/volumemanager.pas
index d54de31e..89de38ba 100644
--- a/src/driver/storage/volumemanager.pas
+++ b/src/driver/storage/volumemanager.pas
@@ -63,6 +63,7 @@ type
     end;
 
     TStorage_Volume = record
+        volumeHandle    : uint32;
         device          : PStorage_device;
         sectorStart     : uint32;
         sectorSize      : uint32;
@@ -81,12 +82,29 @@ type
         // creationT : TDateTime;
         // modifiedT : TDateTime;
     end;
+
+    TFilehandleEntry = record
+        volume : PStorage_Volume;
+        fileName : pchar;
+        fileHandle : uint32;
+        openMode : TOpenMode;
+        writeMode : TWriteMode;
+        lock : Boolean;
+        closed : Boolean;
+
+    end;
+
+    PFilehandleEntry = ^TFilehandleEntry;
   
 var
 
     storageVolumes : PLinkedListBase;
     filesystems : PlinkedListBase;
 
+    fileHandles : PLinkedListBase;
+
+    { Returns the number of volumes }
+
     procedure init();
     
     procedure register_filesystem(filesystem : PFilesystem);
@@ -224,6 +242,9 @@ begin
     { setup lists }
     storageVolumes:= ll_New(sizeof(TFilesystem));
     filesystems:= ll_New(sizeof(TFilesystem));   
+    fileHandles:= ll_New(sizeof(TFilehandleEntry));
+
+    { register commands }
 
     terminal.registerCommand('volume', @volume_command, 'Volume utility');   
 end;
@@ -368,4 +389,43 @@ begin
     // if rootVolume = PStorage_Volume(0) then rootVolume:= volume;
 end;
 
+procedure openFile(Handle : uint32; Filename : PChar; OpenMode : TOpenMode; WriteMode : TWriteMode; lock : boolean; Error : PError);
+var
+    fileHandleEntree : PFilehandleEntry;
+    fileHandle : uInt32;
+    i : uint32;
+    elm : void;
+begin
+    push_trace('VolumeManager.openFile');
+
+    //check if file is already open and if it is locked, if openmode is not read only
+    if OpenMode <> omReadOnly then begin
+        for i:=0 to LL_Size(fileHandles) - 1 do begin
+            elm := LL_Get(fileHandles, i);
+            if stringEquals(PFilehandleEntry(elm)^.filename, Filename) then begin
+                if PFilehandleEntry(elm)^.locked and (not PFilehandleEntry(elm)^.closed) then begin
+                    Error^ := eFileInUse;
+                    exit;
+                end;
+            end;
+        end;
+    end;
+
+    //create filehandleentry
+    fileHandleEntree := PFilehandleEntry(kalloc(SizeOf(TFilehandleEntry)));
+    fileHandleEntree.fileName := Filename;
+    fileHandleEntree^.openMode := OpenMode;
+    fileHandleEntree^.writeMode := WriteMode;
+    fileHandleEntree^.lock := lock;
+    fileHandleEntree^.closed := false;
+
+    //create filehandle
+    fileHandle := LL_Size(fileHandles);
+
+
+end;
+
+
+end;
+
 end.
\ No newline at end of file