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src: use smart pointers in cares_wrap.cc #23813

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src: use smart pointers in cares_wrap.cc #23813

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danbev
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@danbev danbev commented Oct 22, 2018

Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • commit message follows commit guidelines

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@danbev build started: https://ci.nodejs.org/blue/organizations/jenkins/node-test-pull-request-lite-pipeline/detail/node-test-pull-request-lite-pipeline/1332/pipeline

@nodejs-github-bot nodejs-github-bot added c++ Issues and PRs that require attention from people who are familiar with C++. cares Issues and PRs related to the c-ares dependency or the cares_wrap binding. labels Oct 22, 2018
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danbev commented Oct 22, 2018

CI: https://ci.nodejs.org/job/node-test-pull-request/18039/

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bnoordhuis approved these changes Oct 22, 2018
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src/cares_wrap.cc Outdated
@@ -1990,8 +1990,8 @@ void GetAddrInfo(const FunctionCallbackInfo<Value>& args) {
*hostname,
nullptr,
&hints);
if (err)
delete req_wrap;
if (!err)
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err == 0 (ditto line 2025)

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Thanks, I'll fix this shortly.

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danbev commented Oct 23, 2018

CI re-run: https://ci.nodejs.org/job/node-test-pull-request/18062/

addaleax
addaleax approved these changes Oct 23, 2018
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refack
refack reviewed Oct 23, 2018
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refack commented Oct 23, 2018

I'm not sure this code is correct. unique_ptr has ownership semantics, it's not an RAII tool. It's not clear who owns the wraps.

From our style guide:
R.20: Use unique_ptr or shared_ptr to represent ownership

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Please use RAII without ownership semantics

@refack refack dismissed their stale review October 23, 2018 16:11

I'm not sure...

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danbev commented Oct 29, 2018

Please use RAII without ownership semantics

I think the code is clear as it is without using RAII, and there have been quite a few approvals for this PR. I'm happy to change if others feel the same way though.

refack
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refack commented Oct 29, 2018

Please use RAII without ownership semantics

I think the code is clear as it is without using RAII, and there have been quite a few approvals for this PR. I'm happy to change if others feel the same way though.

IIUC you are using unique_ptr for RAII. IMHO it's not the best pattern, but AFAICT it is the best we have implemented in our code ATM. So I withdrew my objections.

Since our style guide states:
R.30: Take smart pointers as parameters only to explicitly express lifetime semantics
R.20: Use unique_ptr or shared_ptr to represent ownership
All I ask is for clarifying comments, about why that guideline is broken.

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danbev commented Oct 30, 2018

Updated CI: https://ci.nodejs.org/job/node-test-pull-request/18224/

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danbev commented Nov 2, 2018

Landed in 226a41a.

@danbev danbev closed this Nov 2, 2018
@danbev danbev deleted the cares_smart_pointers branch November 2, 2018 09:54
danbev added a commit that referenced this pull request Nov 2, 2018
@danbev
src: use smart pointers in cares_wrap.cc
226a41a 
PR-URL: #23813
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Refael Ackermann <[email protected]>
targos pushed a commit that referenced this pull request Nov 18, 2018
@danbev @targos
src: use smart pointers in cares_wrap.cc
b297abb 
PR-URL: #23813
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Refael Ackermann <[email protected]>
rvagg pushed a commit that referenced this pull request Nov 28, 2018
@danbev @rvagg
src: use smart pointers in cares_wrap.cc
ea862ac 
PR-URL: #23813
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Refael Ackermann <[email protected]>
@BridgeAR BridgeAR mentioned this pull request Dec 5, 2018
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codebytere pushed a commit that referenced this pull request Jan 13, 2019
@danbev @codebytere
src: use smart pointers in cares_wrap.cc
4ae7327 
PR-URL: #23813
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Refael Ackermann <[email protected]>
@codebytere codebytere mentioned this pull request Jan 15, 2019
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codebytere pushed a commit that referenced this pull request Jan 29, 2019
@danbev @codebytere
src: use smart pointers in cares_wrap.cc
be14283 
PR-URL: #23813
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Refael Ackermann <[email protected]>
This was referenced Jan 29, 2019
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@mihalskiy mihalskiy mihalskiy approved these changes

@addaleax addaleax addaleax approved these changes

@jasnell jasnell jasnell approved these changes

@bnoordhuis bnoordhuis bnoordhuis approved these changes

@refack refack refack approved these changes

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