Пример #1
0
        /// <summary>
        /// Try to load a native library by providing the full path including the file name of the library.
        /// </summary>
        /// <returns>True if the library was successfully loaded or if it has already been loaded.</returns>
        static bool TryLoadFile(string directory, string relativePath, string fileName)
        {
            lock (StaticLock)
            {
                if (NativeHandles.Value.TryGetValue(fileName, out IntPtr libraryHandle))
                {
                    return(true);
                }

                var fullPath = Path.GetFullPath(Path.Combine(Path.Combine(directory, relativePath), fileName));
                if (!File.Exists(fullPath))
                {
                    // If the library isn't found within an architecture specific folder then return false
                    // to allow normal P/Invoke searching behavior when the library is called
                    return(false);
                }

#if NET5_0_OR_GREATER
                try
                {
                    if (!NativeLibrary.TryLoad(fullPath, out libraryHandle) || libraryHandle == IntPtr.Zero)
                    {
                        return(false);
                    }
                }
                catch
                {
                    return(false);
                }

                NativeHandles.Value[fileName] = libraryHandle;
                return(true);
#else
                try
                {
                    // If successful this will return a handle to the library
                    libraryHandle = IsWindows ? WindowsLoader.LoadLibrary(fullPath) : IsMac?MacLoader.LoadLibrary(fullPath) : LinuxLoader.LoadLibrary(fullPath);
                }
                catch (Exception e)
                {
                    LastException = e;
                    return(false);
                }

                if (libraryHandle == IntPtr.Zero)
                {
                    int lastError = Marshal.GetLastWin32Error();
                    var exception = new System.ComponentModel.Win32Exception(lastError);
                    LastException = exception;
                    return(false);
                }

                LastException = null;
                NativeHandles.Value[fileName] = libraryHandle;
                return(true);
#endif
            }
        }
Пример #2
0
        /// <summary>
        /// Try to load a native library by only the file name of the library.
        /// </summary>
        /// <returns>True if the library was successfully loaded or if it has already been loaded.</returns>
        static bool TryLoadDirect(string fileName)
        {
            lock (StaticLock)
            {
                if (NativeHandles.Value.TryGetValue(fileName, out IntPtr libraryHandle))
                {
                    return(true);
                }

#if NET5_0_OR_GREATER
                try
                {
                    if (!NativeLibrary.TryLoad(fileName, out libraryHandle) || libraryHandle == IntPtr.Zero)
                    {
                        return(false);
                    }
                }
                catch
                {
                    return(false);
                }

                NativeHandles.Value[fileName] = libraryHandle;
                return(true);
#else
                try
                {
                    // If successful this will return a handle to the library
                    libraryHandle = IsWindows ? WindowsLoader.LoadLibrary(fileName) : IsMac?MacLoader.LoadLibrary(fileName) : LinuxLoader.LoadLibrary(fileName);
                }
                catch (Exception e)
                {
                    LastException = e;
                    return(false);
                }

                if (libraryHandle == IntPtr.Zero)
                {
                    int lastError = Marshal.GetLastWin32Error();
                    var exception = new System.ComponentModel.Win32Exception(lastError);
                    LastException = exception;
                    return(false);
                }

                LastException = null;
                NativeHandles.Value[fileName] = libraryHandle;
                return(true);
#endif
            }
        }