<div dir="ltr"><div><div><div>Thanks you for your perfect explanation.<br></div>I
wanted to use stdio.h because i was looking for a way to read some
values from outside, while a virtual machine is in runtime; so my idea
was to use the fopen function to read values from a normal file (txt or
something).<br>
</div><div>But now i understand why i can't use stdio.h (kernel mode etc).<br><br></div>So,
in VMMAll/ is it IMPOSSIBILE to read a value from another file? I read
your answer, i understand that a possibile way is from tm struct, but if
i need to use a value that can change in rumtime? My achievement is to
read (in VMMAll/ ) value from an external file, and read this value more
times, and this value can change during the execution.<br>
<br></div><div>For example, i need to execute a part code ONLY when i want, so my idea was to write ( in a VMMALL/ .cpp file) code like this:<br><br></div><div>x= get value from external file MYVALUE (xml or somehting) (in this file, the value is 0)<br>
</div><div>if (x) { do something;}<br><br></div><div>every time virtualbox execute this code, nothing happend.<br><br></div><div>after a while, from extern i change the value in the file MYVALUE (from 0 to 1)<br></div><div>
Now, when virtualbox execute the code above, it enters in the {do something;}<br></div><div><br></div><div>I hope you can understand my example.<br></div><br><div class="gmail_extra"><br><br><div class="gmail_quote">2014-06-11 13:51 GMT+02:00 Klaus Espenlaub <span dir="ltr"><<a href="mailto:klaus.espenlaub@oracle.com" target="_blank">klaus.espenlaub@oracle.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="">On 09.06.2014 12:51, Johannes DeWitt wrote:<br>
> I tried to use this function in VMM/VMMAll/TMAll.cpp, but when i<br>
> compile, i receive this: ‘CFGMR3GetRoot’ was not declared in this scope<br>
> I added #include <VBox/vmm/cfgm.h, but atill have this error.<br>
<br>
</div>TMAll.cpp is code which is compiled several times, once for the<br>
userland, once for kernel mode etc etc., which shares data. In this code<br>
it's impossible to deal with CFGM settings. Everything must be already<br>
stored in the VM or VMCPU structure or somewhere reachable from there<br>
while in userland. See VMMR3/TM.cpp how the TM settings are handled (it<br>
already uses CFGM), your needs probably can be covered by adding a few<br>
such settings.<br>
<br>
Note that all extradata keys (see documentation of VBoxManage extradata)<br>
starting with VBoxInternal/ are stored in CFGM automatically, i.e. you<br>
need to set VBoxInternal/TM/foo to some value in order to have it<br>
available in VMMR3/TM.cpp.<br>
<div class=""><br>
> Any ideas? I tried also to include <stdio.h> for others achievements,<br>
> but i recieve an error too (however in others .cpp files i can use<br>
> stdio.h without any problems): i don't understand why<br>
<br>
</div>See above. One can't use the normal stdio.h functionality from kernel. A<br>
subset of the Runtime functionality is available, and I don't think you<br>
need anything which isn't already used by VMMAll/*.cpp.<br>
<br>
Klaus<br>
<div class=""><br>
> 2014-06-06 14:51 GMT+02:00 Frank Mehnert <<a href="mailto:frank.mehnert@oracle.com">frank.mehnert@oracle.com</a><br>
</div>> <mailto:<a href="mailto:frank.mehnert@oracle.com">frank.mehnert@oracle.com</a>>>:<br>
<div class="im HOEnZb">><br>
> Johannes,<br>
><br>
> On Friday 06 June 2014 14:46:46 Johannes DeWitt wrote:<br>
> > I, i need to use come IMachine methods in source code. For<br>
> example, if a<br>
> > want to use the GetSettingsFilePath() function (used in<br>
> > tstVBoxAPIXPCOM.cpp) in a cpp file of the source code, for<br>
> example in a cpp<br>
> > file in /src/VBox/VMM/VMMAll/, how can i do it?<br>
> > And which headers files i need to include?<br>
><br>
> that's actually not the intended way to use !VirtualBox. VMM and Main<br>
> are strictly separated, and in particular the IMachine code you are<br>
> talking about lives in VBoxSVC while the VMM code lives in the VBoxSVC<br>
> client (either the VirtualBox process or the VBoxHeadless process).<br>
><br>
> Inside VMM you should always have a pRoot handle,<br>
><br>
> pRoot = CFGMR3GetRoot(pVM);<br>
><br>
> Using this pRoot handle you can access the CFGM tree for that particular<br>
> VM.<br>
><br>
> Kind regards,<br>
><br>
> Frank<br>
<br>
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