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n-api: add methods to open/close callback scope
Add support for the following methods; napi_open_callback_scope napi_close_callback_scope These are needed when running asynchronous methods directly using uv. Backport-PR-URL: #19447 PR-URL: #18089 Fixes: #15604 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,138 @@ | ||
| #include "node_api.h" | ||
| #include "uv.h" | ||
| #include "../common.h" | ||
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| namespace { | ||
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| // the test needs to fake out the async structure, so we need to use | ||
| // the raw structure here and then cast as done behind the scenes | ||
| // in napi calls. | ||
| struct async_context { | ||
| double async_id; | ||
| double trigger_async_id; | ||
| }; | ||
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| napi_value RunInCallbackScope(napi_env env, napi_callback_info info) { | ||
| size_t argc; | ||
| napi_value args[4]; | ||
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| NAPI_CALL(env, napi_get_cb_info(env, info, &argc, nullptr, nullptr, nullptr)); | ||
| NAPI_ASSERT(env, argc == 4 , "Wrong number of arguments"); | ||
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| NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, nullptr, nullptr)); | ||
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| napi_valuetype valuetype; | ||
| NAPI_CALL(env, napi_typeof(env, args[0], &valuetype)); | ||
| NAPI_ASSERT(env, valuetype == napi_object, | ||
| "Wrong type of arguments. Expects an object as first argument."); | ||
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| NAPI_CALL(env, napi_typeof(env, args[1], &valuetype)); | ||
| NAPI_ASSERT(env, valuetype == napi_number, | ||
| "Wrong type of arguments. Expects a number as second argument."); | ||
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| NAPI_CALL(env, napi_typeof(env, args[2], &valuetype)); | ||
| NAPI_ASSERT(env, valuetype == napi_number, | ||
| "Wrong type of arguments. Expects a number as third argument."); | ||
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| NAPI_CALL(env, napi_typeof(env, args[3], &valuetype)); | ||
| NAPI_ASSERT(env, valuetype == napi_function, | ||
| "Wrong type of arguments. Expects a function as third argument."); | ||
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| struct async_context context; | ||
| NAPI_CALL(env, napi_get_value_double(env, args[1], &context.async_id)); | ||
| NAPI_CALL(env, | ||
| napi_get_value_double(env, args[2], &context.trigger_async_id)); | ||
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| napi_callback_scope scope = nullptr; | ||
| NAPI_CALL( | ||
| env, | ||
| napi_open_callback_scope(env, | ||
| args[0], | ||
| reinterpret_cast<napi_async_context>(&context), | ||
| &scope)); | ||
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| // if the function has an exception pending after the call that is ok | ||
| // so we don't use NAPI_CALL as we must close the callback scope regardless | ||
| napi_value result = nullptr; | ||
| napi_status function_call_result = | ||
| napi_call_function(env, args[0], args[3], 0, nullptr, &result); | ||
| if (function_call_result != napi_ok) { | ||
| GET_AND_THROW_LAST_ERROR((env)); | ||
| } | ||
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| NAPI_CALL(env, napi_close_callback_scope(env, scope)); | ||
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| return result; | ||
| } | ||
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| static napi_env shared_env = nullptr; | ||
| static napi_deferred deferred = nullptr; | ||
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| static void Callback(uv_work_t* req, int ignored) { | ||
| napi_env env = shared_env; | ||
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| napi_handle_scope handle_scope = nullptr; | ||
| NAPI_CALL_RETURN_VOID(env, napi_open_handle_scope(env, &handle_scope)); | ||
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| napi_value resource_name; | ||
| NAPI_CALL_RETURN_VOID(env, napi_create_string_utf8( | ||
| env, "test", NAPI_AUTO_LENGTH, &resource_name)); | ||
| napi_async_context context; | ||
| NAPI_CALL_RETURN_VOID(env, | ||
| napi_async_init(env, nullptr, resource_name, &context)); | ||
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| napi_value resource_object; | ||
| NAPI_CALL_RETURN_VOID(env, napi_create_object(env, &resource_object)); | ||
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| napi_value undefined_value; | ||
| NAPI_CALL_RETURN_VOID(env, napi_get_undefined(env, &undefined_value)); | ||
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| napi_callback_scope scope = nullptr; | ||
| NAPI_CALL_RETURN_VOID(env, napi_open_callback_scope(env, | ||
| resource_object, | ||
| context, | ||
| &scope)); | ||
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| NAPI_CALL_RETURN_VOID(env, | ||
| napi_resolve_deferred(env, deferred, undefined_value)); | ||
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| NAPI_CALL_RETURN_VOID(env, napi_close_callback_scope(env, scope)); | ||
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| NAPI_CALL_RETURN_VOID(env, napi_close_handle_scope(env, handle_scope)); | ||
| delete req; | ||
| } | ||
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| napi_value TestResolveAsync(napi_env env, napi_callback_info info) { | ||
| napi_value promise = nullptr; | ||
| if (deferred == nullptr) { | ||
| shared_env = env; | ||
| NAPI_CALL(env, napi_create_promise(env, &deferred, &promise)); | ||
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| uv_loop_t* loop = nullptr; | ||
| NAPI_CALL(env, napi_get_uv_event_loop(env, &loop)); | ||
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| uv_work_t* req = new uv_work_t(); | ||
| uv_queue_work(loop, | ||
| req, | ||
| [](uv_work_t*) {}, | ||
| Callback); | ||
| } | ||
| return promise; | ||
| } | ||
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| napi_value Init(napi_env env, napi_value exports) { | ||
| napi_property_descriptor descriptors[] = { | ||
| DECLARE_NAPI_PROPERTY("runInCallbackScope", RunInCallbackScope), | ||
| DECLARE_NAPI_PROPERTY("testResolveAsync", TestResolveAsync) | ||
| }; | ||
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| NAPI_CALL(env, napi_define_properties( | ||
| env, exports, sizeof(descriptors) / sizeof(*descriptors), descriptors)); | ||
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| return exports; | ||
| } | ||
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| } // anonymous namespace | ||
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| NAPI_MODULE(NODE_GYP_MODULE_NAME, Init) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,9 @@ | ||
| { | ||
| 'targets': [ | ||
| { | ||
| 'target_name': 'binding', | ||
| 'defines': [ 'V8_DEPRECATION_WARNINGS=1' ], | ||
| 'sources': [ 'binding.cc' ] | ||
| } | ||
| ] | ||
| } |
13 changes: 13 additions & 0 deletions
13
test/addons-napi/test_callback_scope/test-resolve-async.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| 'use strict'; | ||
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| const common = require('../../common'); | ||
| const assert = require('assert'); | ||
| const { testResolveAsync } = require(`./build/${common.buildType}/binding`); | ||
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| let called = false; | ||
| testResolveAsync().then(common.mustCall(() => { | ||
| called = true; | ||
| })); | ||
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| setTimeout(common.mustCall(() => { assert(called); }), | ||
| common.platformTimeout(20)); |
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