Make TypeDescriptor thread safe with custom providers and minimize lock use - #92548

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Make TypeDescriptor thread safe with custom providers and minimize lock use#92548
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@karakasakarakasa commented Sep 24, 2023

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Summary

Fix#92394

Similar to #92521 but the PR takes a more aggressive approach. The PR creates specialized versions of AddProvider and NodeFor(Type) for use in CheckDefaultProvider to minimize lock. Though the side effects are not fully reviewed due to control flow change.

Risk

The performance should be close to, or better than, the before-PR implementation because the lock statement doesn't change.

The PR might introduce bugs as it puts s_defaultProviders[type] = nullafterAddProvider.

Originally a race condition exists in `CheckDefaultProvider` and leads
to wrong results when many methods are called simultaneously.
The PR fixes that by extending the lock statement.
Fixdotnet#92934
to wrong results when many methods are called simultaneously.
The PR fixes that by extending the lock statement.
Fixdotnet#92394
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Issue Details

Fix #92394

Similar to #92521 but the PR takes a more aggressive approach. The PR creates specialized versions of AddProvider and NodeFor(Type) for use in CheckDefaultProvider to minimize lock. Though the side effects are not fully reviewed.

Author:karakasa
Assignees:-
Labels:

area-System.ComponentModel

Milestone:-

@karakasa

karakasa commented Sep 24, 2023

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Sometimes the PR causes stack overflow. Reject.

@karakasa
karakasa deleted the issue-92394-fewer-lock branch September 27, 2023 16:35
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TypeDescriptor.GetProperties(object instance) is not thread-safe

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
Skip to content

Make TypeDescriptor thread safe with custom providers and minimize lock use - #92548

Closed
karakasa wants to merge 8 commits into
dotnet:mainfrom
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Make TypeDescriptor thread safe with custom providers and minimize lock use#92548
karakasa wants to merge 8 commits into
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@karakasa

@karakasakarakasa commented Sep 24, 2023

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Summary

Fix#92394

Similar to #92521 but the PR takes a more aggressive approach. The PR creates specialized versions of AddProvider and NodeFor(Type) for use in CheckDefaultProvider to minimize lock. Though the side effects are not fully reviewed due to control flow change.

Risk

The performance should be close to, or better than, the before-PR implementation because the lock statement doesn't change.

The PR might introduce bugs as it puts s_defaultProviders[type] = nullafterAddProvider.

Originally a race condition exists in `CheckDefaultProvider` and leads
to wrong results when many methods are called simultaneously.
The PR fixes that by extending the lock statement.
Fixdotnet#92934
to wrong results when many methods are called simultaneously.
The PR fixes that by extending the lock statement.
Fixdotnet#92394
@ghostghost added area-System.ComponentModel community-contribution Indicates that the PR has been added by a community member labels Sep 24, 2023
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Issue Details

Fix #92394

Similar to #92521 but the PR takes a more aggressive approach. The PR creates specialized versions of AddProvider and NodeFor(Type) for use in CheckDefaultProvider to minimize lock. Though the side effects are not fully reviewed.

Author:karakasa
Assignees:-
Labels:

area-System.ComponentModel

Milestone:-

@karakasa

karakasa commented Sep 24, 2023

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Sometimes the PR causes stack overflow. Reject.

@karakasa
karakasa deleted the issue-92394-fewer-lock branch September 27, 2023 16:35
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TypeDescriptor.GetProperties(object instance) is not thread-safe

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@karakasa
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix"); } } catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
Skip to content

Make TypeDescriptor thread safe with custom providers and minimize lock use - #92548

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karakasa wants to merge 8 commits into
dotnet:mainfrom
karakasa:issue-92394-fewer-lock
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Make TypeDescriptor thread safe with custom providers and minimize lock use#92548
karakasa wants to merge 8 commits into
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@karakasa

@karakasakarakasa commented Sep 24, 2023

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Summary

Fix#92394

Similar to #92521 but the PR takes a more aggressive approach. The PR creates specialized versions of AddProvider and NodeFor(Type) for use in CheckDefaultProvider to minimize lock. Though the side effects are not fully reviewed due to control flow change.

Risk

The performance should be close to, or better than, the before-PR implementation because the lock statement doesn't change.

The PR might introduce bugs as it puts s_defaultProviders[type] = nullafterAddProvider.

Originally a race condition exists in `CheckDefaultProvider` and leads
to wrong results when many methods are called simultaneously.
The PR fixes that by extending the lock statement.
Fixdotnet#92934
to wrong results when many methods are called simultaneously.
The PR fixes that by extending the lock statement.
Fixdotnet#92394
@ghostghost added area-System.ComponentModel community-contribution Indicates that the PR has been added by a community member labels Sep 24, 2023
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Issue Details

Fix #92394

Similar to #92521 but the PR takes a more aggressive approach. The PR creates specialized versions of AddProvider and NodeFor(Type) for use in CheckDefaultProvider to minimize lock. Though the side effects are not fully reviewed.

Author:karakasa
Assignees:-
Labels:

area-System.ComponentModel

Milestone:-

@karakasa

karakasa commented Sep 24, 2023

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Sometimes the PR causes stack overflow. Reject.

@karakasa
karakasa deleted the issue-92394-fewer-lock branch September 27, 2023 16:35
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TypeDescriptor.GetProperties(object instance) is not thread-safe

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@karakasa
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms"); } } catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
Skip to content

Make TypeDescriptor thread safe with custom providers and minimize lock use - #92548

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karakasa wants to merge 8 commits into
dotnet:mainfrom
karakasa:issue-92394-fewer-lock
Closed

Make TypeDescriptor thread safe with custom providers and minimize lock use#92548
karakasa wants to merge 8 commits into
dotnet:mainfrom
karakasa:issue-92394-fewer-lock

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@karakasa

@karakasakarakasa commented Sep 24, 2023

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Summary

Fix#92394

Similar to #92521 but the PR takes a more aggressive approach. The PR creates specialized versions of AddProvider and NodeFor(Type) for use in CheckDefaultProvider to minimize lock. Though the side effects are not fully reviewed due to control flow change.

Risk

The performance should be close to, or better than, the before-PR implementation because the lock statement doesn't change.

The PR might introduce bugs as it puts s_defaultProviders[type] = nullafterAddProvider.

Originally a race condition exists in `CheckDefaultProvider` and leads
to wrong results when many methods are called simultaneously.
The PR fixes that by extending the lock statement.
Fixdotnet#92934
to wrong results when many methods are called simultaneously.
The PR fixes that by extending the lock statement.
Fixdotnet#92394
@ghostghost added area-System.ComponentModel community-contribution Indicates that the PR has been added by a community member labels Sep 24, 2023
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Issue Details

Fix #92394

Similar to #92521 but the PR takes a more aggressive approach. The PR creates specialized versions of AddProvider and NodeFor(Type) for use in CheckDefaultProvider to minimize lock. Though the side effects are not fully reviewed.

Author:karakasa
Assignees:-
Labels:

area-System.ComponentModel

Milestone:-

@karakasa

karakasa commented Sep 24, 2023

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Sometimes the PR causes stack overflow. Reject.

@karakasa
karakasa deleted the issue-92394-fewer-lock branch September 27, 2023 16:35
@ghostghost locked as resolved and limited conversation to collaborators Oct 27, 2023
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TypeDescriptor.GetProperties(object instance) is not thread-safe

1 participant

@karakasa
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links"); } } catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); } })(); (function(){ try { var __m = "youtube.com"; var __re = new RegExp('^' + "youtube\\.com" + '
Skip to content

Make TypeDescriptor thread safe with custom providers and minimize lock use - #92548

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Make TypeDescriptor thread safe with custom providers and minimize lock use#92548
karakasa wants to merge 8 commits into
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@karakasa

@karakasakarakasa commented Sep 24, 2023

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Summary

Fix#92394

Similar to #92521 but the PR takes a more aggressive approach. The PR creates specialized versions of AddProvider and NodeFor(Type) for use in CheckDefaultProvider to minimize lock. Though the side effects are not fully reviewed due to control flow change.

Risk

The performance should be close to, or better than, the before-PR implementation because the lock statement doesn't change.

The PR might introduce bugs as it puts s_defaultProviders[type] = nullafterAddProvider.

Originally a race condition exists in `CheckDefaultProvider` and leads
to wrong results when many methods are called simultaneously.
The PR fixes that by extending the lock statement.
Fixdotnet#92934
to wrong results when many methods are called simultaneously.
The PR fixes that by extending the lock statement.
Fixdotnet#92394
@ghostghost added area-System.ComponentModel community-contribution Indicates that the PR has been added by a community member labels Sep 24, 2023
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Issue Details

Fix #92394

Similar to #92521 but the PR takes a more aggressive approach. The PR creates specialized versions of AddProvider and NodeFor(Type) for use in CheckDefaultProvider to minimize lock. Though the side effects are not fully reviewed.

Author:karakasa
Assignees:-
Labels:

area-System.ComponentModel

Milestone:-

@karakasa

karakasa commented Sep 24, 2023

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Sometimes the PR causes stack overflow. Reject.

@karakasa
karakasa deleted the issue-92394-fewer-lock branch September 27, 2023 16:35
@ghostghost locked as resolved and limited conversation to collaborators Oct 27, 2023
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Successfully merging this pull request may close these issues.

TypeDescriptor.GetProperties(object instance) is not thread-safe

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@karakasa
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default"); } } catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
Skip to content

Make TypeDescriptor thread safe with custom providers and minimize lock use - #92548

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karakasa wants to merge 8 commits into
dotnet:mainfrom
karakasa:issue-92394-fewer-lock
Closed

Make TypeDescriptor thread safe with custom providers and minimize lock use#92548
karakasa wants to merge 8 commits into
dotnet:mainfrom
karakasa:issue-92394-fewer-lock

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@karakasa

@karakasakarakasa commented Sep 24, 2023

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Summary

Fix#92394

Similar to #92521 but the PR takes a more aggressive approach. The PR creates specialized versions of AddProvider and NodeFor(Type) for use in CheckDefaultProvider to minimize lock. Though the side effects are not fully reviewed due to control flow change.

Risk

The performance should be close to, or better than, the before-PR implementation because the lock statement doesn't change.

The PR might introduce bugs as it puts s_defaultProviders[type] = nullafterAddProvider.

Originally a race condition exists in `CheckDefaultProvider` and leads
to wrong results when many methods are called simultaneously.
The PR fixes that by extending the lock statement.
Fixdotnet#92934
to wrong results when many methods are called simultaneously.
The PR fixes that by extending the lock statement.
Fixdotnet#92394
@ghostghost added area-System.ComponentModel community-contribution Indicates that the PR has been added by a community member labels Sep 24, 2023
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Issue Details

Fix #92394

Similar to #92521 but the PR takes a more aggressive approach. The PR creates specialized versions of AddProvider and NodeFor(Type) for use in CheckDefaultProvider to minimize lock. Though the side effects are not fully reviewed.

Author:karakasa
Assignees:-
Labels:

area-System.ComponentModel

Milestone:-

@karakasa

karakasa commented Sep 24, 2023

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Sometimes the PR causes stack overflow. Reject.

@karakasa
karakasa deleted the issue-92394-fewer-lock branch September 27, 2023 16:35
@ghostghost locked as resolved and limited conversation to collaborators Oct 27, 2023
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Labels

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Successfully merging this pull request may close these issues.

TypeDescriptor.GetProperties(object instance) is not thread-safe

1 participant

@karakasa
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers"); } } catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); } })(); (function(){ try { var __m = "*"; var __re = new RegExp('^' + ".*" + '
Skip to content

Make TypeDescriptor thread safe with custom providers and minimize lock use - #92548

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karakasa wants to merge 8 commits into
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Closed

Make TypeDescriptor thread safe with custom providers and minimize lock use#92548
karakasa wants to merge 8 commits into
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@karakasa

@karakasakarakasa commented Sep 24, 2023

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Summary

Fix#92394

Similar to #92521 but the PR takes a more aggressive approach. The PR creates specialized versions of AddProvider and NodeFor(Type) for use in CheckDefaultProvider to minimize lock. Though the side effects are not fully reviewed due to control flow change.

Risk

The performance should be close to, or better than, the before-PR implementation because the lock statement doesn't change.

The PR might introduce bugs as it puts s_defaultProviders[type] = nullafterAddProvider.

Originally a race condition exists in `CheckDefaultProvider` and leads
to wrong results when many methods are called simultaneously.
The PR fixes that by extending the lock statement.
Fixdotnet#92934
to wrong results when many methods are called simultaneously.
The PR fixes that by extending the lock statement.
Fixdotnet#92394
@ghostghost added area-System.ComponentModel community-contribution Indicates that the PR has been added by a community member labels Sep 24, 2023
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Issue Details

Fix #92394

Similar to #92521 but the PR takes a more aggressive approach. The PR creates specialized versions of AddProvider and NodeFor(Type) for use in CheckDefaultProvider to minimize lock. Though the side effects are not fully reviewed.

Author:karakasa
Assignees:-
Labels:

area-System.ComponentModel

Milestone:-

@karakasa

karakasa commented Sep 24, 2023

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Sometimes the PR causes stack overflow. Reject.

@karakasa
karakasa deleted the issue-92394-fewer-lock branch September 27, 2023 16:35
@ghostghost locked as resolved and limited conversation to collaborators Oct 27, 2023
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TypeDescriptor.GetProperties(object instance) is not thread-safe

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode"); } } catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); } })(); })();
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Make TypeDescriptor thread safe with custom providers and minimize lock use - #92548

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karakasa wants to merge 8 commits into
dotnet:mainfrom
karakasa:issue-92394-fewer-lock
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Make TypeDescriptor thread safe with custom providers and minimize lock use#92548
karakasa wants to merge 8 commits into
dotnet:mainfrom
karakasa:issue-92394-fewer-lock

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@karakasa

@karakasakarakasa commented Sep 24, 2023

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Summary

Fix#92394

Similar to #92521 but the PR takes a more aggressive approach. The PR creates specialized versions of AddProvider and NodeFor(Type) for use in CheckDefaultProvider to minimize lock. Though the side effects are not fully reviewed due to control flow change.

Risk

The performance should be close to, or better than, the before-PR implementation because the lock statement doesn't change.

The PR might introduce bugs as it puts s_defaultProviders[type] = nullafterAddProvider.

Originally a race condition exists in `CheckDefaultProvider` and leads
to wrong results when many methods are called simultaneously.
The PR fixes that by extending the lock statement.
Fixdotnet#92934
to wrong results when many methods are called simultaneously.
The PR fixes that by extending the lock statement.
Fixdotnet#92394
@ghostghost added area-System.ComponentModel community-contribution Indicates that the PR has been added by a community member labels Sep 24, 2023
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Issue Details

Fix #92394

Similar to #92521 but the PR takes a more aggressive approach. The PR creates specialized versions of AddProvider and NodeFor(Type) for use in CheckDefaultProvider to minimize lock. Though the side effects are not fully reviewed.

Author:karakasa
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area-System.ComponentModel

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@karakasa

karakasa commented Sep 24, 2023

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Sometimes the PR causes stack overflow. Reject.

@karakasa
karakasa deleted the issue-92394-fewer-lock branch September 27, 2023 16:35
@ghostghost locked as resolved and limited conversation to collaborators Oct 27, 2023
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TypeDescriptor.GetProperties(object instance) is not thread-safe

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