src: prepare v8 platform for multi-isolate support (workers preparation) #89
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I see a bunch of NodePlatform method signatures changing. Do you think it'd make sense to keep no-isolate versions of those which just iterate over all the isolates and call the isolate versions of those methods to reduce change impact on embedders? |
@Qard I think that’s just |
src/node.cc
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| @@ -259,28 +259,32 @@ static v8::Isolate* node_isolate; | |||
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| node::DebugOptions debug_options; | |||
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| #ifdef NODE_USE_V8_PLATFORM | |||
| NodePlatform* NodePlatform::platform = nullptr; | |||
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As far as I can tell, we don't actually need to switch this to a static field. It's initialized the same way in the Initialize() method, it's just pointing at NodePlatform::platform rather than _platform. It doesn't seem like NodePlatform itself actually makes any use of that reference. Did I miss something?
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Updated with a new approach :)
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@ayojs/core I’d appreciate some advice on how to make reviewing this easier – I realize this is a pretty niché topic within Node/V8… |
src/node.h
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| // If `platform` is passed, it will be used to register new worker instances. | ||
| // It can be `nullptr`, in which case creating new workers will not work. |
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The word "creating new workers" is vague to me. Creating new workers in the isolate for which isolate data are created? or creating new workers whose isolate is the isolate for which isolate data are created?
src/node_platform.cc
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| static void FlushTasks(uv_async_t* handle) { | ||
| NodePlatform* platform = static_cast<NodePlatform*>(handle->data); | ||
| platform->FlushForegroundTasksInternal(); | ||
| void PerIsolatePlatformData::FlushTasks(uv_async_t* handle) { |
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Is it possible to move this function to where all the other PerIsolatePlatformData methods are?
src/node_platform.h
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| @@ -3,13 +3,18 @@ | |||
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| #include <queue> | |||
| #include <vector> | |||
| #include <unordered_map> | |||
src/node.h
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| @@ -209,8 +210,26 @@ NODE_EXTERN void Init(int* argc, | |||
| class IsolateData; | |||
| class Environment; | |||
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| NODE_EXTERN IsolateData* CreateIsolateData(v8::Isolate* isolate, | |||
| struct uv_loop_s* loop); | |||
| class WorkerSupportingPlatform : public v8::Platform { | |||
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Can the name be made more generic, like maybe MultiIsolatePlatform? After all, this is a public API.
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@TimothyGu @Qard Fixed review nits, please take another look if you can :) |
This splits the task queue used for asynchronous tasks scheduled by V8 in per-isolate queues, so that multiple threads can be supported. PR-URL: ayojs#89 Reviewed-By: Timothy Gu <timothygu99@gmail.com>
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This splits the task queue used for asynchronous tasks scheduled by V8 in per-isolate queues, so that multiple threads can be supported. PR-URL: ayojs/ayo#89 Reviewed-By: Timothy Gu <timothygu99@gmail.com>
This splits the task queue used for asynchronous tasks scheduled by V8 in per-isolate queues, so that multiple threads can be supported. Original-PR-URL: ayojs/ayo#89 Original-Reviewed-By: Timothy Gu <timothygu99@gmail.com> PR-URL: #16700 Reviewed-By: James M Snell <jasnell@gmail.com>
This splits the task queue used for asynchronous tasks scheduled by V8 in per-isolate queues, so that multiple threads can be supported. Original-PR-URL: ayojs/ayo#89 Original-Reviewed-By: Timothy Gu <timothygu99@gmail.com> PR-URL: #16700 Reviewed-By: James M Snell <jasnell@gmail.com>
This splits the task queue used for asynchronous tasks scheduled by V8 in per-isolate queues, so that multiple threads can be supported. Original-PR-URL: ayojs/ayo#89 Original-Reviewed-By: Timothy Gu <timothygu99@gmail.com> PR-URL: nodejs#16700 Reviewed-By: James M Snell <jasnell@gmail.com>
This splits the task queue used for asynchronous tasks scheduled by V8 in per-isolate queues, so that multiple threads can be supported. Backport-PR-URL: #20901 Original-PR-URL: ayojs/ayo#89 Original-Reviewed-By: Timothy Gu <timothygu99@gmail.com> PR-URL: #16700 Reviewed-By: James M Snell <jasnell@gmail.com>
This splits the task queue used for asynchronous tasks scheduled by V8 in per-isolate queues, so that multiple threads can be supported. Backport-PR-URL: #20901 Original-PR-URL: ayojs/ayo#89 Original-Reviewed-By: Timothy Gu <timothygu99@gmail.com> PR-URL: #16700 Reviewed-By: James M Snell <jasnell@gmail.com>
This splits the task queue used for asynchronous tasks scheduled by V8 in per-isolate queues, so that multiple threads can be supported.
Checklist
make -j4 test(UNIX), orvcbuild test(Windows) passes