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http: simplify parser lifetime tracking #18135

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Instead of providing a separate class for keeping the parser alive during its own call back, just delay a possible .close() call until the stack has cleared completely.

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  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • commit message follows commit guidelines
Affected core subsystem(s)

http

Instead of providing a separate class for keeping the
parser alive during its own call back, just delay a
possible `.close()` call until the stack has cleared
completely.
@nodejs-github-bot nodejs-github-bot added c++ Issues and PRs that require attention from people who are familiar with C++. http Issues or PRs related to the http subsystem. http_parser Issues and PRs related to the HTTP Parser dependency or the http_parser binding. labels Jan 13, 2018
parser.close();
// Make sure the parser's stack has unwound before deleting the
// corresponding C++ object through .close().
setImmediate((parser) => parser.close(), parser);
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It's trivial, but can you make this a top level function instead of allocating the closure?

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Does it make much of a difference if it’s not a closure? I would expect engines to optimize that away?

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Like, yes, I can do that, I’m just curious whether it makes any difference.

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Yeah, it makes a difference. In this case it would likely be trivial but it definitely has an impact. The engines do not optimize away the closures at this point

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👍

@addaleax addaleax added the author ready PRs that have at least one approval, no pending requests for changes, and a CI started. label Jan 18, 2018
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Landed in a7a1ada

@addaleax addaleax closed this Jan 18, 2018
@addaleax addaleax deleted the parser-no-refcount branch January 18, 2018 21:58
addaleax added a commit that referenced this pull request Jan 18, 2018
Instead of providing a separate class for keeping the
parser alive during its own call back, just delay a
possible `.close()` call until the stack has cleared
completely.

PR-URL: #18135
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Franziska Hinkelmann <[email protected]>
Reviewed-By: Anatoli Papirovski <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
@addaleax addaleax removed the author ready PRs that have at least one approval, no pending requests for changes, and a CI started. label Jan 18, 2018
evanlucas pushed a commit that referenced this pull request Jan 30, 2018
Instead of providing a separate class for keeping the
parser alive during its own call back, just delay a
possible `.close()` call until the stack has cleared
completely.

PR-URL: #18135
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Franziska Hinkelmann <[email protected]>
Reviewed-By: Anatoli Papirovski <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
evanlucas pushed a commit that referenced this pull request Jan 30, 2018
Instead of providing a separate class for keeping the
parser alive during its own call back, just delay a
possible `.close()` call until the stack has cleared
completely.

PR-URL: #18135
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Franziska Hinkelmann <[email protected]>
Reviewed-By: Anatoli Papirovski <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
@MylesBorins
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should we land this on LTS? does it need some time to bake?

MayaLekova pushed a commit to MayaLekova/node that referenced this pull request May 8, 2018
Instead of providing a separate class for keeping the
parser alive during its own call back, just delay a
possible `.close()` call until the stack has cleared
completely.

PR-URL: nodejs#18135
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Franziska Hinkelmann <[email protected]>
Reviewed-By: Anatoli Papirovski <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
MylesBorins pushed a commit that referenced this pull request May 23, 2018
Instead of providing a separate class for keeping the
parser alive during its own call back, just delay a
possible `.close()` call until the stack has cleared
completely.

PR-URL: #18135
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Franziska Hinkelmann <[email protected]>
Reviewed-By: Anatoli Papirovski <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
MylesBorins pushed a commit that referenced this pull request Jun 14, 2018
Instead of providing a separate class for keeping the
parser alive during its own call back, just delay a
possible `.close()` call until the stack has cleared
completely.

PR-URL: #18135
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Franziska Hinkelmann <[email protected]>
Reviewed-By: Anatoli Papirovski <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
@MylesBorins MylesBorins mentioned this pull request Jul 9, 2018
rvagg pushed a commit that referenced this pull request Aug 16, 2018
Instead of providing a separate class for keeping the
parser alive during its own call back, just delay a
possible `.close()` call until the stack has cleared
completely.

PR-URL: #18135
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Franziska Hinkelmann <[email protected]>
Reviewed-By: Anatoli Papirovski <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
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