mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Ramanpreet Nara
39d67737c0
Summary:
If a NativeModule requires main queue setup, its `getConstants()` method must be executed on the main thead. The legacy NativeModule infra takes care of this for us. With TurboModules, however, all synchronous methods, including `getConstants()`, execute on the JS thread. Therefore, if a TurboModule requires main queue setup, and exports constants, we must execute its `getConstants()` method body on the main queue explicitly.
**Notes:**
- The changes in this diff should be a noop when TurboModules is off, because `RCTUnsafeExecuteOnMainQueueSync` synchronously execute its block on the current thread if the current thread is the main thread.
- If a NativeModule doens't have the `requiresMainQueueSetup` method, but has the `constantsToExport` method, both NativeModules and TurboModules assume that it requires main queue setup.
## Script
```
const exec = require("../lib/exec");
const abspath = require("../lib/abspath");
const relpath = require("../lib/relpath");
const readFile = (filename) => require("fs").readFileSync(filename, "utf8");
const writeFile = (filename, content) =>
require("fs").writeFileSync(filename, content);
function main() {
const tmFiles = exec("cd ~/fbsource && xbgs -n 10000 -l constantsToExport")
.split("\n")
.filter(Boolean);
const filesWithoutConstantsToExport = [];
const filesWithConstantsToExportButNotGetConstants = [];
const filesExplicitlyNotRequiringMainQueueSetup = [];
tmFiles
.filter((filename) => {
if (filename.includes("microsoft-fork-of-react-native")) {
return false;
}
return /\.mm?$/.test(filename);
})
.map(abspath)
.forEach((filename) => {
const code = readFile(filename);
const relFilename = relpath(filename);
if (!/constantsToExport\s*{/.test(code)) {
filesWithoutConstantsToExport.push(relFilename);
return;
}
if (!/getConstants\s*{/.test(code)) {
filesWithConstantsToExportButNotGetConstants.push(relFilename);
return;
}
if (/requiresMainQueueSetup\s*{/.test(code)) {
const requiresMainQueueSetupRegex = /requiresMainQueueSetup\s*{\s*return\s+(?<requiresMainQueueSetup>YES|NO)/;
const requiresMainQueueSetupRegexMatch = requiresMainQueueSetupRegex.exec(
code
);
if (!requiresMainQueueSetupRegexMatch) {
throw new Error(
"Detected requiresMainQueueSetup method in file " +
relFilename +
" but was unable to parse the method return value"
);
}
const {
requiresMainQueueSetup,
} = requiresMainQueueSetupRegexMatch.groups;
if (requiresMainQueueSetup == "NO") {
filesExplicitlyNotRequiringMainQueueSetup.push(relFilename);
return;
}
}
const getConstantsTypeRegex = () => /-\s*\((?<type>.*)\)getConstants\s*{/;
const getConstantsTypeRegexMatch = getConstantsTypeRegex().exec(code);
if (!getConstantsTypeRegexMatch) {
throw new Error(
`Failed to parse return type of getConstants method in file ${relFilename}`
);
}
const getConstantsType = getConstantsTypeRegexMatch.groups.type;
const getConstantsBody = code
.split(getConstantsTypeRegex())[2]
.split("\n}")[0];
const newGetConstantsBody = `
__block ${getConstantsType} constants;
RCTUnsafeExecuteOnMainQueueSync(^{${getConstantsBody
.replace(/\n/g, "\n ")
.replace(/_bridge/g, "self->_bridge")
.replace(/return /g, "constants = ")}
});
return constants;
`;
writeFile(
filename,
code
.replace(getConstantsBody, newGetConstantsBody)
.replace("#import", "#import <React/RCTUtils.h>\n#import")
);
});
console.log("Files without constantsToExport: ");
filesWithoutConstantsToExport.forEach((file) => console.log(file));
console.log();
console.log("Files with constantsToExport but no getConstants: ");
filesWithConstantsToExportButNotGetConstants.forEach((file) =>
console.log(file)
);
console.log();
console.log("Files with requiresMainQueueSetup = NO: ");
filesExplicitlyNotRequiringMainQueueSetup.forEach((file) =>
console.log(file)
);
}
if (!module.parent) {
main();
}
```
Changelog: [Internal]
Reviewed By: fkgozali
Differential Revision: D21797048
fbshipit-source-id: a822a858fecdbe976e6197f8339e509dc7cd917f
95 lines
2.6 KiB
Plaintext
95 lines
2.6 KiB
Plaintext
/*
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#import "RCTPlatform.h"
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#import <UIKit/UIKit.h>
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#import <FBReactNativeSpec/FBReactNativeSpec.h>
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#import <React/RCTUtils.h>
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#import <React/RCTVersion.h>
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#import "CoreModulesPlugins.h"
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using namespace facebook::react;
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static NSString *interfaceIdiom(UIUserInterfaceIdiom idiom)
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{
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switch (idiom) {
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case UIUserInterfaceIdiomPhone:
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return @"phone";
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case UIUserInterfaceIdiomPad:
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return @"pad";
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case UIUserInterfaceIdiomTV:
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return @"tv";
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case UIUserInterfaceIdiomCarPlay:
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return @"carplay";
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default:
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return @"unknown";
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}
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}
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@interface RCTPlatform () <NativePlatformConstantsIOSSpec>
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@end
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@implementation RCTPlatform
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RCT_EXPORT_MODULE(PlatformConstants)
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+ (BOOL)requiresMainQueueSetup
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{
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return YES;
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}
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- (dispatch_queue_t)methodQueue
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{
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return dispatch_get_main_queue();
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}
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// TODO: Use the generated struct return type.
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- (ModuleConstants<JS::NativePlatformConstantsIOS::Constants>)constantsToExport
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{
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return (ModuleConstants<JS::NativePlatformConstantsIOS::Constants>)[self getConstants];
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}
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- (ModuleConstants<JS::NativePlatformConstantsIOS::Constants>)getConstants
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{
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__block ModuleConstants<JS::NativePlatformConstantsIOS::Constants> constants;
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RCTUnsafeExecuteOnMainQueueSync(^{
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UIDevice *device = [UIDevice currentDevice];
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auto versions = RCTGetReactNativeVersion();
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constants = typedConstants<JS::NativePlatformConstantsIOS::Constants>({
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.forceTouchAvailable = RCTForceTouchAvailable() ? true : false,
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.osVersion = [device systemVersion],
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.systemName = [device systemName],
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.interfaceIdiom = interfaceIdiom([device userInterfaceIdiom]),
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.isTesting = RCTRunningInTestEnvironment() ? true : false,
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.reactNativeVersion = JS::NativePlatformConstantsIOS::ConstantsReactNativeVersion::Builder(
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{.minor = [versions[@"minor"] doubleValue],
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.major = [versions[@"major"] doubleValue],
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.patch = [versions[@"patch"] doubleValue],
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.prerelease = [versions[@"prerelease"] isKindOfClass:[NSNull class]]
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? folly::Optional<double>{}
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: [versions[@"prerelease"] doubleValue]}),
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});
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});
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return constants;
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}
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- (std::shared_ptr<TurboModule>)getTurboModule:(const ObjCTurboModule::InitParams &)params
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{
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return std::make_shared<NativePlatformConstantsIOSSpecJSI>(params);
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}
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@end
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Class RCTPlatformCls(void)
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{
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return RCTPlatform.class;
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}
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