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src: allow generic C++ callables in SetImmediate() #28704

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addaleax
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Modify the native SetImmediate() functions to take generic C++
callables as arguments. This makes passing arguments to the callback
easier, and in particular, it allows passing std::unique_ptrs
directly, which in turn makes sure that the data they point to is
deleted if the Environment is torn down before the callback can run.

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

@nodejs-github-bot nodejs-github-bot added c++ Issues and PRs that require attention from people who are familiar with C++. lib / src Issues and PRs related to general changes in the lib or src directory. labels Jul 15, 2019
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@addaleax addaleax added the wip Issues and PRs that are still a work in progress. label Jul 15, 2019
@addaleax addaleax force-pushed the native-immediate-type-erasure branch from ff700c2 to 0386696 Compare July 15, 2019 22:35
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@addaleax addaleax force-pushed the native-immediate-type-erasure branch from 0386696 to 3cf4e25 Compare July 20, 2019 15:25
static_cast<PerformanceGCKind>(type),
state->performance_last_gc_start_mark,
PERFORMANCE_NOW());
env->SetUnrefImmediate([entry = std::move(entry)](Environment* env) mutable {
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Why does this need mutable?

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Because here entry is moved again out of the function, and so it needs to be modifiable – Do you think a comment would help/be necessary here?

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Fwiw, I requested access to CI machines for debugging in nodejs/build#1875 because I really can’t figure out why this would crash, although it’s (probably?) a problem with the relatively overseeable N-API bits here.

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Modify the native `SetImmediate()` functions to take generic C++
callables as arguments. This makes passing arguments to the callback
easier, and in particular, it allows passing `std::unique_ptr`s
directly, which in turn makes sure that the data they point to is
deleted if the `Environment` is torn down before the callback can run.
@addaleax addaleax force-pushed the native-immediate-type-erasure branch from 6c0712f to 9d04047 Compare July 26, 2019 20:12
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@addaleax addaleax added review wanted PRs that need reviews. and removed wip Issues and PRs that are still a work in progress. labels Jul 28, 2019
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CI is yellow, so I think this could use a review :)

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Landed in 5207dec

@addaleax addaleax closed this Jul 31, 2019
@addaleax addaleax deleted the native-immediate-type-erasure branch July 31, 2019 23:41
addaleax added a commit that referenced this pull request Jul 31, 2019
Modify the native `SetImmediate()` functions to take generic C++
callables as arguments. This makes passing arguments to the callback
easier, and in particular, it allows passing `std::unique_ptr`s
directly, which in turn makes sure that the data they point to is
deleted if the `Environment` is torn down before the callback can run.

PR-URL: #28704
Reviewed-By: James M Snell <[email protected]>
targos pushed a commit that referenced this pull request Aug 2, 2019
Modify the native `SetImmediate()` functions to take generic C++
callables as arguments. This makes passing arguments to the callback
easier, and in particular, it allows passing `std::unique_ptr`s
directly, which in turn makes sure that the data they point to is
deleted if the `Environment` is torn down before the callback can run.

PR-URL: #28704
Reviewed-By: James M Snell <[email protected]>
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