The term "native module" dates back to some of the oldest code
in the code base. Within the context of Node.js core it usually
refers to modules that are native to Node.js (e.g. fs, http),
but it can cause confusion for people who don't work on this
part of the code base, as "native module" can also refer to
native addons - which is even the case in some of the API
docs and error messages.
This patch tries to make the usage of these terms more consistent.
Now within the context of Node.js core:
- JavaScript scripts that are built-in to Node.js are now referred
to as "built-in(s)". If they are available as modules,
they can also be referred to as "built-in module(s)".
- Dynamically-linked shared objects that are loaded into
the Node.js processes are referred to as "addons".
We will try to avoid using the term "native modules" because it could
be ambiguous.
Changes in this patch:
File names:
- node_native_module.h -> node_builtins.h,
- node_native_module.cc -> node_builtins.cc
C++ binding names:
- `native_module` -> `builtins`
`node::Environment`:
- `native_modules_without_cache` -> `builtins_without_cache`
- `native_modules_with_cache` -> `builtins_with_cache`
- `native_modules_in_snapshot` -> `builtins_in_cache`
- `native_module_require` -> `builtin_module_require`
`node::EnvSerializeInfo`:
- `native_modules` -> `builtins
`node::native_module::NativeModuleLoader`:
- `native_module` namespace -> `builtins` namespace
- `NativeModuleLoader` -> `BuiltinLoader`
- `NativeModuleRecordMap` -> `BuiltinSourceMap`
- `NativeModuleCacheMap` -> `BuiltinCodeCacheMap`
- `ModuleIds` -> `BuiltinIds`
- `ModuleCategories` -> `BuiltinCategories`
- `LoadBuiltinModuleSource` -> `LoadBuiltinSource`
`loader.js`:
- `NativeModule` -> `BuiltinModule` (the `NativeModule` name used in
`process.moduleLoadList` is kept for compatibility)
And other clarifications in the documentation and comments.
PR-URL: https://github.com/nodejs/node/pull/44135
Fixes: https://github.com/nodejs/node/issues/44036
Reviewed-By: Jacob Smith <jacob@frende.me>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Jan Krems <jan.krems@gmail.com>
Unlike JS-only modules, native add-ons are always associated with a
dynamic shared object from which they are loaded. Being able to
retrieve its absolute path is important to native-only add-ons, i.e.
add-ons that are not themselves being loaded from a JS-only module
located in the same package as the native add-on itself.
Currently, the file name is obtained at environment construction time
from the JS `module.filename`. Nevertheless, the presence of `module`
is not required, because the file name could also be passed in via a
private property added onto `exports` from the `process.dlopen`
binding.
As an attempt at future-proofing, the file name is provided as a URL,
i.e. prefixed with the `file://` protocol.
Fixes: https://github.com/nodejs/node-addon-api/issues/449
PR-URL: https://github.com/nodejs/node/pull/37195
Co-authored-by: Michael Dawson <mdawson@devrus.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>
Add `napi_add_finalizer()`, which provides the ability to attach data
to an arbitrary object and be notified when that object is garbage-
collected so as to have an opportunity to delete the data previously
attached.
This differs from `napi_wrap()` in that it does not use up the private
slot on the object, and is therefore neither removable, nor retrievable
after the call to `napi_add_finalizer()`. It is assumed that the data
is accessible by other means, yet it must be tied to the lifetime of
the object. This is the case for data passed to a dynamically created
function which is itself heap-allocated and must therefore be freed
along with the function.
Fixes: https://github.com/nodejs/abi-stable-node/issues/313
PR-URL: https://github.com/nodejs/node/pull/22244
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
* Move `napi_get_uv_event_loop` into the `NAPI_VERSION >= 2` section
* Move `napi_open_callback_scope`, `napi_close_callback_scope`,
`napi_fatal_exception`, `napi_add_env_cleanup_hook`, and
`napi_remove_env_cleanup_hook` into the `NAPI_VERSION >= 3` section
* Added a missing `added` property to `napi_get_uv_event_loop` in the
docs
* Added a `napiVersion` property to the docs and updated the parser and
generator to use it.
* Added usage documentation
PR-URL: https://github.com/nodejs/node/pull/19962
Reviewed-By: Gabriel Schulhof <gabriel.schulhof@intel.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Bundle a `uv_async_t`, a `uv_idle_t`, a `uv_mutex_t`, a `uv_cond_t`,
and a `v8::Persistent<v8::Function>` to make it possible to call into JS
from another thread. The API accepts a void data pointer and a callback
which will be invoked on the loop thread and which will receive the
`napi_value` representing the JavaScript function to call so as to
perform the call into JS. The callback is run inside a
`node::CallbackScope`.
A `std::queue<void*>` is used to store calls from the secondary
threads, and an idle loop is started by the `uv_async_t` callback on the
loop thread to drain the queue, calling into JS with each item.
Items can be added to the queue blockingly or non-blockingly.
The thread-safe function can be referenced or unreferenced, with the
same semantics as libuv handles.
Re: https://github.com/nodejs/help/issues/1035
Re: https://github.com/nodejs/node/issues/20964
Fixes: https://github.com/nodejs/node/issues/13512
PR-URL: https://github.com/nodejs/node/pull/17887
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
This adds pairs of methods to the `Environment` class and to public APIs
which can add and remove cleanup handlers.
Unlike `AtExit`, this API targets addon developers rather than
embedders, giving them (and Node’s internals) the ability to register
per-`Environment` cleanup work.
We may want to replace `AtExit` with this API at some point.
Many thanks for Stephen Belanger for reviewing the original version of
this commit in the Ayo.js project.
Refs: https://github.com/ayojs/ayo/pull/82
PR-URL: https://github.com/nodejs/node/pull/19377
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Add a utility functions for addons to use when they need
a reference to the current event loop.
While the libuv API is not directly part of N-API, it
provides a quite stable C API as well, and is tightly
integrated with Node itself.
As a particular use case, without access to the event loop
it is hard to do something interesting from inside a N-API
finalizer function, since calls into JS and therefore virtually
all other N-API functions are not allowed.
PR-URL: https://github.com/nodejs/node/pull/17109
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
- Add napi_async_context opaque pointer type.
(If needed, we could later add APIs for getting the async IDs
out of this context.)
- Add napi_async_init() and napi_async_destroy() APIs.
- Add async_context parameter to napi_make_callback().
- Add code and checks to test_make_callback to validate async context
APIs by checking async hooks are called with correct context.
- Update API documentation.
PR-URL: https://github.com/nodejs/node/pull/15189
Fixes: https://github.com/nodejs/node/issues/13254
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Promise is implemented as a pair of objects. `napi_create_promise()`
returns both a JavaScript promise and a newly allocated "deferred" in
its out-params. The deferred is linked to the promise such that the
deferred can be passed to `napi_resolve_deferred()` or
`napi_reject_deferred()` to reject/resolve the promise.
`napi_is_promise()` can be used to check if a `napi_value` is a native
promise - that is, a promise created by the underlying engine, rather
than a pure JS implementation of a promise.
PR-URL: https://github.com/nodejs/node/pull/14365
Fixes: https://github.com/nodejs/abi-stable-node/issues/242
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Calling napi_wrap() twice on the same object has the result of returning
napi_invalid_arg on the second call. However, sometimes it is necessary
to replace the native pointer associated with a given object. This new
API allows one to remove an existing pointer, returning the object to
its pristine, non-wrapped state.
PR-URL: https://github.com/nodejs/node/pull/14658
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Fixes: https://github.com/nodejs/abi-stable-node/issues/266
- Add separate APIs for creating different kinds of numbers,
because creating a V8 number value from an integer is faster
than creating one from a double.
- When getting number values, avoid getting the current context
because the context will not actually be used and is expensive
to obtain.
- When creating values, don't use v8::TryCatch (NAPI_PREAMBLE),
because these functions have no possibility of executing JS code.
Refs: https://github.com/nodejs/node/issues/14379
PR-URL: https://github.com/nodejs/node/pull/14573
Reviewed-By: Timothy Gu <timothygu99@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Chengzhong Wu