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//
// MetadataReferenceCache.cs
//
// Author:
// David Karlaš <david.karlas@xamarin.com>
//
// Copyright (c) 2015 Xamarin, Inc (http://www.xamarin.com)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using Microsoft.CodeAnalysis;
using System.Collections.Generic;
using System.Threading.Tasks;
using System.IO;
using MonoDevelop.Core;
using System.Threading;
namespace MonoDevelop.Ide.TypeSystem
{
static class MetadataReferenceCache
{
static Dictionary<string, MetadataReferenceCacheItem> cache = new Dictionary<string, MetadataReferenceCacheItem> ();
public static MetadataReference LoadReference (ProjectId projectId, string path)
{
lock (cache) {
MetadataReferenceCacheItem result;
if (!cache.TryGetValue (path, out result)) {
result = new MetadataReferenceCacheItem (path);
cache.Add (path, result);
}
result.InUseBy.Add (projectId);
return result.Reference;
}
}
//TODO: This should be called when reference is actually removed and not on
//project reload because if this is only project that has this reference... Cache will be
//invalidated and when reload comes back in few miliseconds it will need to reload reference again
public static void RemoveReference (ProjectId projectId, string path)
{
lock (cache) {
MetadataReferenceCacheItem result;
if (cache.TryGetValue (path, out result)) {
result.InUseBy.Remove (projectId);
if (result.InUseBy.Count == 0) {
cache.Remove (path);
}
}
}
}
public static void RemoveReferences (ProjectId id)
{
lock (cache) {
var toRemove = new List<string> ();
foreach (var val in cache) {
val.Value.InUseBy.Remove (id);
if (val.Value.InUseBy.Count == 0) {
toRemove.Add (val.Key);
}
}
toRemove.ForEach ((k) => cache.Remove (k));
}
}
static Timer timer;
static MetadataReferenceCache ()
{
timer = new Timer ((o) => CheckForChanges (), null, 10000, 10000);
}
//TODO: Call this method when focus returns to MD or even better use FileSystemWatcher
public static void CheckForChanges ()
{
lock (cache) {
foreach (var value in cache.Values) {
value.CheckForChange ();
}
}
}
class MetadataReferenceCacheItem
{
public HashSet<ProjectId> InUseBy { get; private set; }
public MetadataReference Reference { get; private set; }
readonly string path;
DateTime timeStamp;
public MetadataReferenceCacheItem (string path)
{
this.path = path;
CreateNewReference ();
InUseBy = new HashSet<ProjectId> ();
}
public void CheckForChange ()
{
if (timeStamp != File.GetLastWriteTimeUtc (path)) {
if (Reference != null) {
foreach (var solution in IdeApp.Workspace.GetAllSolutions ()) {
var workspace = TypeSystemService.GetWorkspace (solution);
foreach (var projId in InUseBy) {
while (true) {
var project = workspace.CurrentSolution.GetProject (projId);
if (project == null)
break;
if (workspace.TryApplyChanges (project.RemoveMetadataReference (Reference).Solution))
break;
}
}
}
}
CreateNewReference ();
if (Reference != null) {
foreach (var solution in IdeApp.Workspace.GetAllSolutions ()) {
var workspace = TypeSystemService.GetWorkspace (solution);
foreach (var projId in InUseBy) {
while (true) {
var project = workspace.CurrentSolution.GetProject (projId);
if (project == null)
break;
if (workspace.TryApplyChanges (project.AddMetadataReference (Reference).Solution))
break;
}
}
}
}
}
}
readonly static DateTime NonExistentFile = new DateTime (1601, 1, 1);
void CreateNewReference ()
{
timeStamp = File.GetLastWriteTimeUtc (path);
if (timeStamp == NonExistentFile) {
Reference = null;
} else {
Reference = MetadataReference.CreateFromFile (path, MetadataReferenceProperties.Assembly);
}
}
}
}
}
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