Databases
StackOverflow2013
Postsdbo
POC++ library issue
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POC++ library issue
    primarykey
    data
    text
    <p>I'm trying to make a call to a C++ library from my C# code. I also have a sample application written in C++ that invokes the same library, and works fine. However, the call from C# throws an error: </p> <blockquote> <p>Attempted to read or write protected memory. This is often an indication that other memory is corrupt.</p> </blockquote> <p>The c# code is:</p> <pre><code>#region DllImports [DllImport("kernel32.dll", EntryPoint = "LoadLibrary")] static extern int LoadLibrary([MarshalAs(UnmanagedType.LPStr)] string lpLibFileName); [DllImport("kernel32.dll", EntryPoint = "GetProcAddress")] static extern IntPtr GetProcAddress(int hModule, [MarshalAs(UnmanagedType.LPStr)] string lpProcName); [DllImport("kernel32.dll", EntryPoint = "FreeLibrary")] static extern bool FreeLibrary(int hModule); [UnmanagedFunctionPointerAttribute(CallingConvention.Cdecl)] delegate string bondProbeCalc(string licenseFolder, string requestString); #endregion /// &lt;summary&gt; /// Calls Bondprobe to calculate a formula /// &lt;/summary&gt; internal static string DoBondProbeOperation(string requestString) { if (string.IsNullOrEmpty(requestString)) throw new ArgumentNullException(); //Reference library int hModule = LoadLibrary(ConfigurationManager.Instance.BondProbeSettings.AssemblyFilePath); if (hModule != 0) { IntPtr intPtr = GetProcAddress(hModule, "bpStringCalc"); bondProbeCalc funcDelegate = (bondProbeCalc)Marshal.GetDelegateForFunctionPointer(intPtr, typeof(bondProbeCalc)); requestString = requestString.EndsWith("=") ? requestString.Substring(0, requestString.Length - 1) : requestString; string returnValue = funcDelegate(ConfigurationManager.Instance.BondProbeSettings.LicenseFilePath, requestString); FreeLibrary(hModule); return returnValue; } return string.Empty; } </code></pre> <p>This exact same code works on some computers, and it throws the error on others. However, the sample C++ app seems to work everywhere.</p> <p>Any ideas?</p> <p>Thanks, Gonzalo</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. USildjarn
    1. USGonzalo
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POC++ library issue
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    2. VO
      singulars
      1. POC++ library issue
      1. This table or related slice is empty.
      1. VTUpMod
    1. COI recommend using `IntPtr` instead of `int` (for all pointers, this includes the return type from LoadLibrary)
      singulars
      1. POC++ library issue
      1. USMarlon
    2. COThank you for the suggestion, but unfortunately that didn't work.
      singulars
      1. POC++ library issue
      1. USGonzalo
    3. COExactly which function causes the crash? All of them?
      singulars
      1. POC++ library issue
      1. USSam Skuce
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload