#if NATIVE
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using IStation.Numerics.Providers.Common.Mkl;
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using System;
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namespace IStation.Numerics.Providers.SparseSolver.Mkl
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{
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/// <summary>
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/// Intel's Math Kernel Library (MKL) sparse solver provider.
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/// </summary>
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internal partial class MklSparseSolverProvider : Managed.ManagedSparseSolverProvider, IDisposable
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{
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const int MinimumCompatibleRevision = 14;
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readonly string _hintPath;
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int sparseSolverMajor;
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int sparseSolverMinor;
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/// <param name="hintPath">Hint path where to look for the native binaries</param>
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internal MklSparseSolverProvider(string hintPath)
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{
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_hintPath = hintPath;
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}
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/// <summary>
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/// Try to find out whether the provider is available, at least in principle.
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/// Verification may still fail if available, but it will certainly fail if unavailable.
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/// </summary>
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public override bool IsAvailable()
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{
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return MklProvider.IsAvailable(hintPath: _hintPath);
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}
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/// <summary>
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/// Initialize and verify that the provided is indeed available.
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/// If calling this method fails, consider to fall back to alternatives like the managed provider.
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/// </summary>
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public override void InitializeVerify()
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{
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int revision = MklProvider.Load(_hintPath);
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if (revision < MinimumCompatibleRevision)
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{
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throw new NotSupportedException($"MKL Native Provider revision r{revision} is too old. Consider upgrading to a newer version. Revision r{MinimumCompatibleRevision} and newer are supported.");
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}
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sparseSolverMajor = SafeNativeMethods.query_capability((int)ProviderCapability.SparseSolverMajor);
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sparseSolverMinor = SafeNativeMethods.query_capability((int)ProviderCapability.SparseSolverMinor);
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if (!(sparseSolverMajor == 1 && sparseSolverMinor >= 0))
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{
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throw new NotSupportedException(string.Format("MKL Native Provider not compatible. Expecting sparse solver v1 but provider implements v{0}.", sparseSolverMajor));
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}
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}
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/// <summary>
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/// Frees memory buffers, caches and handles allocated in or to the provider.
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/// Does not unload the provider itself, it is still usable afterwards.
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/// </summary>
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public override void FreeResources()
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{
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MklProvider.FreeResources();
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}
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public override string ToString()
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{
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return MklProvider.Describe();
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}
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public void Dispose()
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{
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FreeResources();
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}
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}
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}
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#endif
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