C / C++ / MFC

I think I found a solution

17-Apr-15 11:34

Hi
This is a follow up to previous message I went back to the parent process
and used the following two flags in the CreateProcess DEBUG_PROCESS and DEBUG_ONLY_THIS_PROCESS

Well back when I was using VS2008 I would get a dialog box informing the VSDebugger

was debugging the process

Now nothing maybe the app crashed before it hit CWinApp constructer where I had the
DebugBreak();

when I went to the "DEBUG" menu item -> Attach to Process I noticed my app on the selection list

When I tried to attach it I got a message Already attached to Debugger

I have no idea what debugger as I only had the original instance to VS2012 running (at least that I could see)

Any help would be appreciated

ForNow20-Apr-15 14:26

Re: Unable to invoke VIsual Studio debugger in Child process VS2012 pro

20-Apr-15 14:26

Hi It is apparent there is a issue with debugbreak()
Whether it's windows 8.1 or VS 2012 I don't know
I know I did _asm
{ int 3 }
On my window 7 vs 2010 and it worked
So I am thinking how about this
CreateProces(NULL,

if DEBUG

"C:\windows\system32\vsjitdebugger.exe myprog.exe",

end

else

"myprog.exe",

end

Rest of paramters

Richard MacCutchan17-Apr-15 21:17

Re: Unable to invoke VIsual Studio debugger in Child process VS2012 pro

17-Apr-15 21:17

Can you not run the process directly in VS and debug it in the normal way?

ForNow18-Apr-15 14:57

vsjitdebugger Just in time Debugger not set on my laptop windows 8.1 VS 2012 pro

18-Apr-15 14:57

Hi
it just dies somewhere my feeling is there is something amiss in the startup code
as I put DebugBreak(); In The CWinapp constructer

The only way I can debug it if I right click on it VS it gives the option to debug

I know the startup code for a MFC app is somewhere in VS->VC->ATLMFC folder

just trying to figure which one and put a Debugbreak() there

thanks

ForNow19-Apr-15 3:16

Re: MFC: CMFCShellTreeCtrl

19-Apr-15 3:16

hi,

still looking at my problem with debugbreak

for some reason vsjitdebugger which would normally being up a dialog box to chose a debugger

doesn't do that on windows 8.1 vs 2012 pro laptop I think that's part of the problem

Thanks

MFC: CMFCShellTreeCtrl

limseungkyun15-Apr-15 21:03

limseungkyun

15-Apr-15 21:03

Before I say I can't English writing. So, Understand me please.

I want to change property of CMFCShellTreeCtrl in MFC.
But, I can't see anywhere.

Question 1.

Now, I can change CMFCShellTreeCtrl property to see filename. But I can't filtering of file in CMFCShellTreeCtrl.

Question 2.

How can I set start directory of CMFCShellTreeCtrl to 'C drive' from 'Desktop'.

Help me please

David Crow16-Apr-15 9:17

David Crow

16-Apr-15 9:17

limseungkyun wrote:
Now, I can change CMFCShellTreeCtrl property to see filename. But I can't filtering of file in CMFCShellTreeCtrl.

Just guessing but that almost sounds like you'd need a second pane to show the contents of the selected folder (the tree control in the first pane).

limseungkyun wrote:
How can I set start directory of CMFCShellTreeCtrl to 'C drive' from 'Desktop'.

Is it not as simple as calling:

CMFCShellTreeCtrl::SelectPath(_T("C:\\"))

I've not ever used CMFCShellTreeCtrl so my suggestions may be way off.

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles

cross platform tcp c program

praveenvelu15-Apr-15 18:05

praveenvelu

15-Apr-15 18:05

How to write a cross platform tcp c program?

Re: cross platform tcp c program

Richard MacCutchan15-Apr-15 21:40

Re: cross platform tcp c program

15-Apr-15 21:40

You write it by coding according to the rules that apply for each platform.

Albert Holguin16-Apr-15 8:25

Albert Holguin

16-Apr-15 8:25

Sockets aren't exactly implemented the same way across multiple platforms. To achieve a cross-platform program that uses sockets, you can either use compile time switches (#defines) to use the appropriate platform-specific calls and system libraries or use a third party library that already has this compile time switching internally.

A few cross-platform socket libraries:
0) http://zeromq.org/[^]
1) www.boost.org (asio library)[^]
2) Larger frameworks have this too (Qt[^], wxWidgets[^])

CAsyncSockets Blocking/Non blockung

ForNow15-Apr-15 15:41

Re: CAsyncSockets Blocking/Non blockung

15-Apr-15 15:41

Hi
I am somewhat new to TCP/IP, I have been doing some reading on blocking vs non blocking sockets. So my question is when creating a CAsyncsocket object is constructed and created is there a option for what type of socket
Secondly when you get a notification from one of the callback on receive onsend etc
With an error say WSAEINPROGRESS
From the call backs I guess you should just return

Richard MacCutchan15-Apr-15 21:39

Re: CAsyncSockets Blocking/Non blockung

15-Apr-15 21:39

See https://msdn.microsoft.com/en-us/library/1s9cycf8.aspx[^] for socket options.

ForNow16-Apr-15 10:38

Initialisation of a Structure, Can anyone see the Obvious?

16-Apr-15 10:38

Thanks I see there are also some other options with ioctl

Bram van Kampen15-Apr-15 14:59

Bram van Kampen

15-Apr-15 14:59

Hi,

I have the following Code:

C++

</#include "stdafx.h"

struct DB_FIELD{
    const char* FieldName;
    const char* DesignerComments;
    const unsigned int FieldFlags;

    const int FieldType;
    const int FieldEltSize;
    const int FieldEltCount;
    const int FieldOffset;
    const unsigned char PaddingChar;
};

struct DB_FIELD TestFieldItem={
    "Key",  // FieldName
    NULL,   // DesignerComment
    0X00000000, // Field Flags
    13,     // Field Type
    8,  // Field Elt Size
    1,   //Field Elt Count
    0,   // Field Offset
    0    //Padding Char
};

This refuses to compile with the following error message:
"error C2552: 'TestFieldItem' : non-aggregates cannot be initialized with initializer list".

I must be doing something stupid, that I cannot see. Initialising Static Structures is the Cut and Trust of CPP!
Can anyone see the Obvious?

Smile | :)

Bram van Kampen

Re: Initialisation of a Structure, Can anyone see the Obvious?

Richard MacCutchan15-Apr-15 21:37

Re: Initialisation of a Structure, Can anyone see the Obvious?

15-Apr-15 21:37

I just tried that and it compiled fine. Maybe there is something more that you are not showing us.

Bram van Kampen26-Apr-15 14:39

Bram van Kampen

26-Apr-15 14:39

No, Not much more to show, just an Old Compiler!
It Cannot handle these things, but I found a workaround.
Was frightening at the time!

Thanks, Smile | :)

Bram van Kampen

Re: Initialisation of a Structure, Can anyone see the Obvious?

bling17-Apr-15 9:49

bling

17-Apr-15 9:49

As a side note, why declare each member as const?

You could instead write ...

C++

const struct DB_FIELD TestFieldItem =
{
    "Key",  // FieldName
    NULL,   // DesignerComment
    0X00000000, // Field Flags
    13,     // Field Type
    8,  // Field Elt Size
    1,   //Field Elt Count
    0,   // Field Offset
    0    //Padding Char
};

Re: Initialisation of a Structure, Can anyone see the Obvious?

Bram van Kampen26-Apr-15 14:31

Bram van Kampen

26-Apr-15 14:31

Point taken, and since discovered.

There seems to be a C(PP) language ambiguity here, relating to aggregates. There is never a problem with:

C++

const int Var=512;

Thanks for your reply,

Smile | :)

Bram van Kampen

Build errors !

Member 935023715-Apr-15 3:01

Member 9350237

15-Apr-15 3:01

Hi Guys!,

I have been working on Finite state machine based on a well documented tutorial in code project

Generic Finite State Machine (FSM)[^]

I tried compiling the sample project available with this but can't proceed because of few errors. The project is develped with VS 2010 but I'm using 2012.

I'll give the code excerpt where the error points..

C++

struct StateHandlerBase
    {
        SharedData data;
        States state;
        Transitions *m_interfaces[static_cast<size_t>(Size)];
        StateHandlerBase()
            : data(SharedData()),
            state(static_cast<States>(InitState))/*, m_interfaces({0})*/
        {
        }

    };

    typedef int DummyExplicitSpecialization;
    template <States stateParam, class Dummy=DummyExplicitSpecialization>
    struct StateHandler
        : StateHandler<static_cast<States>(static_cast<size_t>(stateParam)-1)>
    {
        TransitionImplement<StateMachineComponents, static_cast<States>(stateParam)> m_interface;
        StateHandler() : m_interface(StateHandlerBase::state, StateHandlerBase::data)
        {
            StateHandlerBase::m_interfaces[static_cast<size_t>(stateParam)] = &m_interface;
        }
    };

    template <class DummyExplicitSpecialization>
    struct StateHandler<static_cast<States>(0), DummyExplicitSpecialization>
        : StateHandlerBase
    {
        TransitionImplement<StateMachineComponents, static_cast<States>(0)> m_interface;
        StateHandler() : m_interface(StateHandlerBase::state, StateHandlerBase::data)
        {
            StateHandlerBase::m_interfaces[0] = &m_interface;
        }
    };

    typedef StateHandler<static_cast<States>(TerminateState), DummyExplicitSpecialization> StateHanlderType;

 StateHanlderType StateHanlderInstance;

These are the errors:

error C2976: 'Fsm<statemachinecomponents>::StateHandler' : too few template arguments

error C3855: 'Fsm<statemachinecomponents>::StateHandler': template parameter 'stateParam' is incompatible with the declaration

I'm totally stuck!!. I have no idea what is happening
Greatly appreciate possible suggestions to get out of this

David Crow15-Apr-15 3:06

David Crow

15-Apr-15 3:06

Member 9350237 wrote:
Greatly appreciate possible suggestions to get out of this

How about showing the line(s) that the compiler is complaining about.

Member 935023715-Apr-15 3:16

Member 9350237

15-Apr-15 3:16

Well, It's 4th line from last.

C++

struct StateHandlerBase
    {
        SharedData data;
        States state;
        Transitions *m_interfaces[static_cast<size_t>(Size)];
        StateHandlerBase()
            : data(SharedData()),
            state(static_cast<States>(InitState))/*, m_interfaces({0})*/
        {
        }

<pre>
};

typedef int DummyExplicitSpecialization;
template &lt;States stateParam, class Dummy=DummyExplicitSpecialization&gt;
struct StateHandler
    : StateHandler&lt;static_cast&lt;States&gt;(static_cast&lt;size_t&gt;(stateParam)-1)&gt;
{
    TransitionImplement&lt;StateMachineComponents, static_cast&lt;States&gt;(stateParam)&gt; m_interface;
    StateHandler() : m_interface(StateHandlerBase::state, StateHandlerBase::data)
    {
        StateHandlerBase::m_interfaces[static_cast&lt;size_t&gt;(stateParam)] = &amp;m_interface;
    }
};

template &lt;class DummyExplicitSpecialization&gt;
struct StateHandler&lt;static_cast&lt;States&gt;(0), DummyExplicitSpecialization&gt;
    : StateHandlerBase
{
    TransitionImplement&lt;StateMachineComponents, static_cast&lt;States&gt;(0)&gt; m_interface;
    StateHandler() : m_interface(StateHandlerBase::state, StateHandlerBase::data)
    {
        StateHandlerBase::m_interfaces[0] = &amp;m_interface;
    }

It's here---> };

typedef StateHandler<static_cast<States>(TerminateState), DummyExplicitSpecialization> StateHanlderType;

StateHanlderType StateHanlderInstance;

Richard Andrew x6415-Apr-15 5:48

Richard Andrew x64

15-Apr-15 5:48

Member 9350237 wrote:
StateHandlerBase::m_interfaces[static_cast<size_t>(stateParam)] = &m_interface;

~~Do you mean to have that m_interface; at the end of the line?~~

Never mind. The HTML got in the way of what I was looking at.

The difficult we do right away...
...the impossible takes slightly longer.

Member 935023715-Apr-15 6:04

Member 9350237

15-Apr-15 6:04

Sorry I think the format got changed.

Basically compiler pointing at forth line from last

end of this structure

C++

struct StateHandler<static_cast<States>(0), DummyExplicitSpecialization>
        : StateHandlerBase

C++

struct StateHandlerBase
    {
        SharedData data;
        States state;
        Transitions *m_interfaces[static_cast<size_t>(Size)];
        StateHandlerBase()
            : data(SharedData()),
            state(static_cast<States>(InitState))/*, m_interfaces({0})*/
        {
        }

    };

    typedef int DummyExplicitSpecialization;
    template <States stateParam, class Dummy=DummyExplicitSpecialization>
    struct StateHandler
        : StateHandler<static_cast<States>(static_cast<size_t>(stateParam)-1)>
    {
        TransitionImplement<StateMachineComponents, static_cast<States>(stateParam)> m_interface;
        StateHandler() : m_interface(StateHandlerBase::state, StateHandlerBase::data)
        {
            StateHandlerBase::m_interfaces[static_cast<size_t>(stateParam)] = &m_interface;
        }
    };

    template <class DummyExplicitSpecialization>
    struct StateHandler<static_cast<States>(0), DummyExplicitSpecialization>
        : StateHandlerBase
    {
        TransitionImplement<StateMachineComponents, static_cast<States>(0)> m_interface;
        StateHandler() : m_interface(StateHandlerBase::state, StateHandlerBase::data)
        {
            StateHandlerBase::m_interfaces[0] = &m_interface;
        }
    };

    typedef StateHandler<static_cast<States>(TerminateState), DummyExplicitSpecialization> StateHanlderType;
 StateHanlderType StateHanlderInstance;