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calloc()

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  • M manu_2205

    Hi I have used many times calloc().But this time it is going fail. What may be the reason when calloc() fails(return bad pointer) Thanx

    manu

    K Offline
    K Offline
    KarstenK
    wrote on last edited by
    #4

    It may be that you want to much memory so the working set memory is fully used. There is a compiler option to tweak it, but i dont know which.

    Greetings from Germany

    1 Reply Last reply
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    • J Jonathan Darka

      It MUST be C++ as this is the Visual C++ / MFC board :)


      Jonathan Wilkes Darka [Xanya.net]

      T Offline
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      toxcct
      wrote on last edited by
      #5

      here is a scoop : The Visual C++ compiler also compiles C code ! ;P


      Don't know where to start ?
      Refer the Forums Guidelines and ask a friend

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      • T toxcct

        here is a scoop : The Visual C++ compiler also compiles C code ! ;P


        Don't know where to start ?
        Refer the Forums Guidelines and ask a friend

        [VisualCalc 3.0][Flags Beginner's Guide]

        J Offline
        J Offline
        Jonathan Darka
        wrote on last edited by
        #6

        Here's another scoop. This is the C++/MFC board, C questions do not belong here. So it's irrelevant whether the VC++ compiler can compile C code. :-D


        Jonathan Wilkes Darka [Xanya.net]

        T 1 Reply Last reply
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        • J Jonathan Darka

          Here's another scoop. This is the C++/MFC board, C questions do not belong here. So it's irrelevant whether the VC++ compiler can compile C code. :-D


          Jonathan Wilkes Darka [Xanya.net]

          T Offline
          T Offline
          toxcct
          wrote on last edited by
          #7

          ok, and tell me where you ask C question on CP elsewhere that this board ? :confused::~


          Don't know where to start ?
          Refer the Forums Guidelines and ask a friend

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          J R 2 Replies Last reply
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          • T toxcct

            ok, and tell me where you ask C question on CP elsewhere that this board ? :confused::~


            Don't know where to start ?
            Refer the Forums Guidelines and ask a friend

            [VisualCalc 3.0][Flags Beginner's Guide]

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            J Offline
            Jonathan Darka
            wrote on last edited by
            #8

            I'd say the soapbox ;)


            Jonathan Wilkes Darka [Xanya.net]

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            • T toxcct

              are you coding in C or C++ ?


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              manu_2205
              wrote on last edited by
              #9

              ya coding in c++ VS2003.

              manu

              J T 2 Replies Last reply
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              • M manu_2205

                ya coding in c++ VS2003.

                manu

                J Offline
                J Offline
                jhwurmbach
                wrote on last edited by
                #10

                manu_2205 wrote:

                c++ VS2003

                Why on earth would you need calloc, then?


                "We trained hard, but it seemed that every time we were beginning to form up into teams we would be reorganised. I was to learn later in life that we tend to meet any new situation by reorganising: and a wonderful method it can be for creating the illusion of progress, while producing confusion, inefficiency and demoralisation." -- Caius Petronius, Roman Consul, 66 A.D.

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                • J Jonathan Darka

                  I'd say the soapbox ;)


                  Jonathan Wilkes Darka [Xanya.net]

                  T Offline
                  T Offline
                  toxcct
                  wrote on last edited by
                  #11

                  Jonathan [Darka] wrote:

                  I'd say the soapbox

                  The SoapBox is for VB... Sorry


                  Don't know where to start ?
                  Refer the Forums Guidelines and ask a friend

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                  • M manu_2205

                    ya coding in c++ VS2003.

                    manu

                    T Offline
                    T Offline
                    toxcct
                    wrote on last edited by
                    #12

                    then what the hell is a calloc() call doing on a C++ code ? C++ deprecates the use of C memory management such as malloc, calloc, realloc and free. instead, you have to use new and delete, and you MUSTN'T miw the two ways together !!!


                    Don't know where to start ?
                    Refer the Forums Guidelines and ask a friend

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                    • M manu_2205

                      Hi I have used many times calloc().But this time it is going fail. What may be the reason when calloc() fails(return bad pointer) Thanx

                      manu

                      P Offline
                      P Offline
                      prasad_som
                      wrote on last edited by
                      #13

                      Can you show code, that is failing ?

                      Prasad Notifier using ATL | Operator new[],delete[][^]

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                      • P prasad_som

                        Can you show code, that is failing ?

                        Prasad Notifier using ATL | Operator new[],delete[][^]

                        T Offline
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                        toxcct
                        wrote on last edited by
                        #14

                        [Message Deleted]

                        P M 2 Replies Last reply
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                        • T toxcct

                          [Message Deleted]

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                          prasad_som
                          wrote on last edited by
                          #15

                          toxcct wrote:

                          has nothing to do in a C++ code.

                          Yes, But interesting to see, why he is facing problem. Strange that people expect help without giving sufficient information.

                          Prasad Notifier using ATL | Operator new[],delete[][^]

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                          • J jhwurmbach

                            manu_2205 wrote:

                            c++ VS2003

                            Why on earth would you need calloc, then?


                            "We trained hard, but it seemed that every time we were beginning to form up into teams we would be reorganised. I was to learn later in life that we tend to meet any new situation by reorganising: and a wonderful method it can be for creating the illusion of progress, while producing confusion, inefficiency and demoralisation." -- Caius Petronius, Roman Consul, 66 A.D.

                            D Offline
                            D Offline
                            David Crow
                            wrote on last edited by
                            #16

                            It may be a legacy product that has been ported to the new compiler.


                            "Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

                            "Judge not by the eye but by the heart." - Native American Proverb

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                            • M manu_2205

                              Hi I have used many times calloc().But this time it is going fail. What may be the reason when calloc() fails(return bad pointer) Thanx

                              manu

                              D Offline
                              D Offline
                              David Crow
                              wrote on last edited by
                              #17

                              There could be any nuber of reason why calloc() would fail. At the point of failure, what values are being passed to it?


                              "Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

                              "Judge not by the eye but by the heart." - Native American Proverb

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                              • D David Crow

                                It may be a legacy product that has been ported to the new compiler.


                                "Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

                                "Judge not by the eye but by the heart." - Native American Proverb

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                                jhwurmbach
                                wrote on last edited by
                                #18

                                DavidCrow wrote:

                                It may be a legacy product that has been ported to the new compiler.

                                He would have told us that, right?:suss: But then, if he would have been really interested in help, he would have given us enough information to help him!:rolleyes:


                                "We trained hard, but it seemed that every time we were beginning to form up into teams we would be reorganised. I was to learn later in life that we tend to meet any new situation by reorganising: and a wonderful method it can be for creating the illusion of progress, while producing confusion, inefficiency and demoralisation." -- Caius Petronius, Roman Consul, 66 A.D.

                                D 1 Reply Last reply
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                                • J jhwurmbach

                                  DavidCrow wrote:

                                  It may be a legacy product that has been ported to the new compiler.

                                  He would have told us that, right?:suss: But then, if he would have been really interested in help, he would have given us enough information to help him!:rolleyes:


                                  "We trained hard, but it seemed that every time we were beginning to form up into teams we would be reorganised. I was to learn later in life that we tend to meet any new situation by reorganising: and a wonderful method it can be for creating the illusion of progress, while producing confusion, inefficiency and demoralisation." -- Caius Petronius, Roman Consul, 66 A.D.

                                  D Offline
                                  D Offline
                                  David Crow
                                  wrote on last edited by
                                  #19

                                  jhwurmbach wrote:

                                  He would have told us that, right?

                                  Not necessarily.

                                  jhwurmbach wrote:

                                  But then, if he would have been really interested in help, he would have given us enough information to help him!

                                  You are making assumptions. Plenty of folks may genuinely want help but may not know how to properly ask for it. The same can be said for folks that may genuinely want to provide help but may not know how to properly do it. ;)


                                  "Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

                                  "Judge not by the eye but by the heart." - Native American Proverb

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                                  • T toxcct

                                    ok, and tell me where you ask C question on CP elsewhere that this board ? :confused::~


                                    Don't know where to start ?
                                    Refer the Forums Guidelines and ask a friend

                                    [VisualCalc 3.0][Flags Beginner's Guide]

                                    R Offline
                                    R Offline
                                    Reagan Conservative
                                    wrote on last edited by
                                    #20

                                    There is such a place: http//cboard.cprogramming.com --- Purely 'C'.

                                    John P.

                                    T 1 Reply Last reply
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                                    • T toxcct

                                      [Message Deleted]

                                      M Offline
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                                      Maximilien
                                      wrote on last edited by
                                      #21

                                      Sometimes I wonder why you are a CP MVP. I work with a large amount of legacy C code that use malloc/calloc/realloc/free I cannot, will not change that because it works and has been working for the last few years. The question is valid, albeit not well "asked", in this forum.


                                      Maximilien Lincourt Your Head A Splode - Strong Bad

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                                      • R Reagan Conservative

                                        There is such a place: http//cboard.cprogramming.com --- Purely 'C'.

                                        John P.

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                                        toxcct
                                        wrote on last edited by
                                        #22

                                        toxcct wrote:

                                        ok, and tell me where you ask C question on CP elsewhere that this board ?

                                        CP means Codeproject.


                                        Don't know where to start ?
                                        Refer the Forums Guidelines and ask a friend

                                        [VisualCalc 3.0][Flags Beginner's Guide]

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                                        • M manu_2205

                                          Hi I have used many times calloc().But this time it is going fail. What may be the reason when calloc() fails(return bad pointer) Thanx

                                          manu

                                          J Offline
                                          J Offline
                                          James R Twine
                                          wrote on last edited by
                                          #23

                                          If it returns NULL, it is a failure, like an out-of-memory or out-of-address-space condition.  If it returns a non-NULL value, but things crash when you try to use it (i.e. it is truly invalid), then I would offer that the heap information used by calloc(...) is messed up,or you are going too far with the pointer returned.    Although, since calloc(...) has to actually touch the memory to initialize it to zero, it should crash within the call to calloc(...) if the memory it allocated is really invalid.    So, what do you mean by "returns bad pointer"?    Peace!

                                          -=- James
                                          Please rate this message - let me know if I helped or not! * * * If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
                                          Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
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