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Removed WeakReference<IHosts> already cleaned up by GC #4995

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merged 2 commits into from
Apr 4, 2020
Merged

Removed WeakReference<IHosts> already cleaned up by GC #4995

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28c14f9
Removing unused IHosts
mstfbl Apr 1, 2020
4c54ff6
Removed unused hosts in both Register methods
mstfbl Apr 2, 2020
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12 changes: 12 additions & 0 deletions src/Microsoft.ML.Core/Environment/HostEnvironmentBase.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -127,12 +127,18 @@ public HostBase(HostEnvironmentBase<TEnv> source, string shortName, string paren
Depth = source.Depth + 1;
}

/// <summary>
/// This method registers and returns the host for the calling component. The generated host is also
/// added to <see cref="_children"/> and encapsulated by <see cref="WeakReference"/>. It becomes
/// necessary to remove these hosts when they are reclaimed by the Garbage Collector.
/// </summary>
public new IHost Register(string name, int? seed = null, bool? verbose = null)
{
Contracts.CheckNonEmpty(name, nameof(name));
IHost host;
lock (_cancelLock)
{
_children.RemoveAll(r => r.TryGetTarget(out IHost _) == false);
Random rand = (seed.HasValue) ? RandomUtils.Create(seed.Value) : RandomUtils.Create(_rand);
host = RegisterCore(this, name, Master?.FullName, rand, verbose ?? Verbose);
if (!IsCanceled)
Expand Down Expand Up @@ -385,12 +391,18 @@ protected HostEnvironmentBase(HostEnvironmentBase<TEnv> source, Random rand, boo
_children = new List<WeakReference<IHost>>();
}

/// <summary>
/// This method registers and returns the host for the calling component. The generated host is also
/// added to <see cref="_children"/> and encapsulated by <see cref="WeakReference"/>. It becomes
/// necessary to remove these hosts when they are reclaimed by the Garbage Collector.
/// </summary>
public IHost Register(string name, int? seed = null, bool? verbose = null)
{
Contracts.CheckNonEmpty(name, nameof(name));
IHost host;
lock (_cancelLock)
{
_children.RemoveAll(r => r.TryGetTarget(out IHost _) == false);
Random rand = (seed.HasValue) ? RandomUtils.Create(seed.Value) : RandomUtils.Create(_rand);
host = RegisterCore(this, name, Master?.FullName, rand, verbose ?? Verbose);
_children.Add(new WeakReference<IHost>(host));
Expand Down