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react-native/React/Base/RCTBatchedBridge.m

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/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#import <Foundation/Foundation.h>
#import "RCTAssert.h"
#import "RCTBridge.h"
#import "RCTBridge+Private.h"
#import "RCTBridgeMethod.h"
#import "RCTConvert.h"
#import "RCTDisplayLink.h"
#import "RCTJSCExecutor.h"
#import "RCTJavaScriptLoader.h"
#import "RCTLog.h"
#import "RCTModuleData.h"
#import "RCTPerformanceLogger.h"
#import "RCTProfile.h"
#import "RCTSourceCode.h"
#import "RCTUtils.h"
#import "RCTRedBox.h"
#import "RCTDevLoadingView.h"
#define RCTAssertJSThread() \
RCTAssert(![NSStringFromClass([self->_javaScriptExecutor class]) isEqualToString:@"RCTJSCExecutor"] || \
[[[NSThread currentThread] name] isEqualToString:RCTJSCThreadName], \
@"This method must be called on JS thread")
/**
* Must be kept in sync with `MessageQueue.js`.
*/
typedef NS_ENUM(NSUInteger, RCTBridgeFields) {
RCTBridgeFieldRequestModuleIDs = 0,
RCTBridgeFieldMethodIDs,
RCTBridgeFieldParams,
RCTBridgeFieldCallID,
};
@implementation RCTBatchedBridge
{
BOOL _wasBatchActive;
NSMutableArray<dispatch_block_t> *_pendingCalls;
NSDictionary<NSString *, RCTModuleData *> *_moduleDataByName;
NSArray<RCTModuleData *> *_moduleDataByID;
NSArray<Class> *_moduleClassesByID;
NSUInteger _modulesInitializedOnMainQueue;
RCTDisplayLink *_displayLink;
}
@synthesize flowID = _flowID;
@synthesize flowIDMap = _flowIDMap;
@synthesize flowIDMapLock = _flowIDMapLock;
@synthesize loading = _loading;
@synthesize valid = _valid;
@synthesize performanceLogger = _performanceLogger;
- (instancetype)initWithParentBridge:(RCTBridge *)bridge
{
RCTAssertParam(bridge);
if (self = [super initWithDelegate:bridge.delegate
bundleURL:bridge.bundleURL
moduleProvider:bridge.moduleProvider
launchOptions:bridge.launchOptions]) {
_parentBridge = bridge;
_performanceLogger = [bridge performanceLogger];
RCTLogInfo(@"Initializing %@ (parent: %@, executor: %@)", self, bridge, [self executorClass]);
/**
* Set Initial State
*/
_valid = YES;
_loading = YES;
_pendingCalls = [NSMutableArray new];
_displayLink = [RCTDisplayLink new];
[RCTBridge setCurrentBridge:self];
}
return self;
}
RCT_NOT_IMPLEMENTED(- (instancetype)initWithDelegate:(id<RCTBridgeDelegate>)delegate
bundleURL:(NSURL *)bundleURL
moduleProvider:(RCTBridgeModuleProviderBlock)block
launchOptions:(NSDictionary *)launchOptions)
- (void)start
{
[[NSNotificationCenter defaultCenter]
postNotificationName:RCTJavaScriptWillStartLoadingNotification
object:_parentBridge userInfo:@{@"bridge": self}];
RCT_PROFILE_BEGIN_EVENT(0, @"-[RCTBatchedBridge setUp]", nil);
dispatch_queue_t bridgeQueue = dispatch_queue_create("com.facebook.react.RCTBridgeQueue", DISPATCH_QUEUE_CONCURRENT);
dispatch_group_t initModulesAndLoadSource = dispatch_group_create();
// Asynchronously load source code
dispatch_group_enter(initModulesAndLoadSource);
__weak RCTBatchedBridge *weakSelf = self;
__block NSData *sourceCode;
[self loadSource:^(NSError *error, NSData *source, __unused int64_t sourceLength) {
if (error) {
RCTLogWarn(@"Failed to load source: %@", error);
dispatch_async(dispatch_get_main_queue(), ^{
[weakSelf stopLoadingWithError:error];
});
}
sourceCode = source;
dispatch_group_leave(initModulesAndLoadSource);
} onProgress:^(RCTLoadingProgress *progressData) {
#ifdef RCT_DEV
RCTDevLoadingView *loadingView = [weakSelf moduleForClass:[RCTDevLoadingView class]];
[loadingView updateProgress:progressData];
#endif
}];
// Synchronously initialize all native modules that cannot be loaded lazily
[self initModulesWithDispatchGroup:initModulesAndLoadSource];
RCTPerformanceLogger *performanceLogger = self->_performanceLogger;
__block NSString *config;
dispatch_group_enter(initModulesAndLoadSource);
dispatch_async(bridgeQueue, ^{
dispatch_group_t setupJSExecutorAndModuleConfig = dispatch_group_create();
// Asynchronously initialize the JS executor
dispatch_group_async(setupJSExecutorAndModuleConfig, bridgeQueue, ^{
[performanceLogger markStartForTag:RCTPLJSCExecutorSetup];
[weakSelf setUpExecutor];
[performanceLogger markStopForTag:RCTPLJSCExecutorSetup];
});
// Asynchronously gather the module config
dispatch_group_async(setupJSExecutorAndModuleConfig, bridgeQueue, ^{
if (weakSelf.valid) {
RCT_PROFILE_BEGIN_EVENT(0, @"-[RCTBatchedBridge moduleConfig", nil);
[performanceLogger markStartForTag:RCTPLNativeModulePrepareConfig];
config = [weakSelf moduleConfig];
[performanceLogger markStopForTag:RCTPLNativeModulePrepareConfig];
RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"");
}
});
dispatch_group_notify(setupJSExecutorAndModuleConfig, bridgeQueue, ^{
// We're not waiting for this to complete to leave dispatch group, since
// injectJSONConfiguration and executeSourceCode will schedule operations
// on the same queue anyway.
[performanceLogger markStartForTag:RCTPLNativeModuleInjectConfig];
[weakSelf injectJSONConfiguration:config onComplete:^(NSError *error) {
[performanceLogger markStopForTag:RCTPLNativeModuleInjectConfig];
if (error) {
RCTLogWarn(@"Failed to inject config: %@", error);
dispatch_async(dispatch_get_main_queue(), ^{
[weakSelf stopLoadingWithError:error];
});
}
}];
dispatch_group_leave(initModulesAndLoadSource);
});
});
dispatch_group_notify(initModulesAndLoadSource, bridgeQueue, ^{
RCTBatchedBridge *strongSelf = weakSelf;
if (sourceCode && strongSelf.loading) {
[strongSelf executeSourceCode:sourceCode];
}
});
RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"");
}
- (void)loadSource:(RCTSourceLoadBlock)_onSourceLoad onProgress:(RCTSourceLoadProgressBlock)onProgress
{
[_performanceLogger markStartForTag:RCTPLScriptDownload];
RCTPerformanceLogger *performanceLogger = _performanceLogger;
RCTSourceLoadBlock onSourceLoad = ^(NSError *error, NSData *source, int64_t sourceLength) {
[performanceLogger markStopForTag:RCTPLScriptDownload];
[performanceLogger setValue:sourceLength forTag:RCTPLBundleSize];
_onSourceLoad(error, source, sourceLength);
};
if ([self.delegate respondsToSelector:@selector(loadSourceForBridge:onProgress:onComplete:)]) {
[self.delegate loadSourceForBridge:_parentBridge onProgress:onProgress onComplete:onSourceLoad];
} else if ([self.delegate respondsToSelector:@selector(loadSourceForBridge:withBlock:)]) {
[self.delegate loadSourceForBridge:_parentBridge withBlock:onSourceLoad];
} else {
RCTAssert(self.bundleURL, @"bundleURL must be non-nil when not implementing loadSourceForBridge");
[RCTJavaScriptLoader loadBundleAtURL:self.bundleURL onProgress:onProgress onComplete:^(NSError *error, NSData *source, int64_t sourceLength) {
if (error && [self.delegate respondsToSelector:@selector(fallbackSourceURLForBridge:)]) {
NSURL *fallbackURL = [self.delegate fallbackSourceURLForBridge:self->_parentBridge];
if (fallbackURL && ![fallbackURL isEqual:self.bundleURL]) {
RCTLogError(@"Failed to load bundle(%@) with error:(%@)", self.bundleURL, error.localizedDescription);
self.bundleURL = fallbackURL;
[RCTJavaScriptLoader loadBundleAtURL:self.bundleURL onProgress:onProgress onComplete:onSourceLoad];
return;
}
}
onSourceLoad(error, source, sourceLength);
}];
}
}
- (NSArray<Class> *)moduleClasses
{
if (RCT_DEBUG && _valid && _moduleClassesByID == nil) {
RCTLogError(@"Bridge modules have not yet been initialized. You may be "
"trying to access a module too early in the startup procedure.");
}
return _moduleClassesByID;
}
/**
* Used by RCTUIManager
*/
- (RCTModuleData *)moduleDataForName:(NSString *)moduleName
{
return _moduleDataByName[moduleName];
}
- (id)moduleForName:(NSString *)moduleName
{
return _moduleDataByName[moduleName].instance;
}
- (BOOL)moduleIsInitialized:(Class)moduleClass
{
return _moduleDataByName[RCTBridgeModuleNameForClass(moduleClass)].hasInstance;
}
- (NSArray *)configForModuleName:(NSString *)moduleName
{
RCTModuleData *moduleData = _moduleDataByName[moduleName];
if (moduleData) {
#if RCT_DEV
if ([self.delegate respondsToSelector:@selector(whitelistedModulesForBridge:)]) {
NSArray *whitelisted = [self.delegate whitelistedModulesForBridge:self];
RCTAssert(!whitelisted || [whitelisted containsObject:[moduleData moduleClass]],
@"Required config for %@, which was not whitelisted", moduleName);
}
#endif
}
return moduleData.config;
}
- (void)initModulesWithDispatchGroup:(dispatch_group_t)dispatchGroup
{
RCT_PROFILE_BEGIN_EVENT(0, @"-[RCTBatchedBridge initModules]", nil);
[_performanceLogger markStartForTag:RCTPLNativeModuleInit];
NSArray<id<RCTBridgeModule>> *extraModules = nil;
if (self.delegate) {
if ([self.delegate respondsToSelector:@selector(extraModulesForBridge:)]) {
extraModules = [self.delegate extraModulesForBridge:_parentBridge];
}
} else if (self.moduleProvider) {
extraModules = self.moduleProvider();
}
#if RCT_DEBUG
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
RCTVerifyAllModulesExported(extraModules);
});
#endif
NSMutableArray<Class> *moduleClassesByID = [NSMutableArray new];
NSMutableArray<RCTModuleData *> *moduleDataByID = [NSMutableArray new];
NSMutableDictionary<NSString *, RCTModuleData *> *moduleDataByName = [NSMutableDictionary new];
// Set up moduleData for pre-initialized module instances
RCT_PROFILE_BEGIN_EVENT(0, @"extraModules", nil);
for (id<RCTBridgeModule> module in extraModules) {
Class moduleClass = [module class];
NSString *moduleName = RCTBridgeModuleNameForClass(moduleClass);
if (RCT_DEBUG) {
// Check for name collisions between preregistered modules
RCTModuleData *moduleData = moduleDataByName[moduleName];
if (moduleData) {
RCTLogError(@"Attempted to register RCTBridgeModule class %@ for the "
"name '%@', but name was already registered by class %@",
moduleClass, moduleName, moduleData.moduleClass);
continue;
}
}
// Instantiate moduleData container
RCTModuleData *moduleData = [[RCTModuleData alloc] initWithModuleInstance:module
bridge:self];
moduleDataByName[moduleName] = moduleData;
[moduleClassesByID addObject:moduleClass];
[moduleDataByID addObject:moduleData];
// Set executor instance
if (moduleClass == self.executorClass) {
_javaScriptExecutor = (id<RCTJavaScriptExecutor>)module;
}
}
RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"");
// The executor is a bridge module, but we want it to be instantiated before
// any other module has access to the bridge, in case they need the JS thread.
// TODO: once we have more fine-grained control of init (t11106126) we can
// probably just replace this with [self moduleForClass:self.executorClass]
RCT_PROFILE_BEGIN_EVENT(0, @"JavaScriptExecutor", nil);
if (!_javaScriptExecutor) {
id<RCTJavaScriptExecutor> executorModule = [self.executorClass new];
RCTModuleData *moduleData = [[RCTModuleData alloc] initWithModuleInstance:executorModule
bridge:self];
moduleDataByName[moduleData.name] = moduleData;
[moduleClassesByID addObject:self.executorClass];
[moduleDataByID addObject:moduleData];
// NOTE: _javaScriptExecutor is a weak reference
_javaScriptExecutor = executorModule;
}
RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"");
// Set up moduleData for automatically-exported modules
RCT_PROFILE_BEGIN_EVENT(0, @"ModuleData", nil);
for (Class moduleClass in RCTGetModuleClasses()) {
NSString *moduleName = RCTBridgeModuleNameForClass(moduleClass);
// Check for module name collisions
RCTModuleData *moduleData = moduleDataByName[moduleName];
if (moduleData) {
if (moduleData.hasInstance) {
// Existing module was preregistered, so it takes precedence
continue;
} else if ([moduleClass new] == nil) {
// The new module returned nil from init, so use the old module
continue;
} else if ([moduleData.moduleClass new] != nil) {
// Both modules were non-nil, so it's unclear which should take precedence
RCTLogError(@"Attempted to register RCTBridgeModule class %@ for the "
"name '%@', but name was already registered by class %@",
moduleClass, moduleName, moduleData.moduleClass);
}
}
// Instantiate moduleData (TODO: can we defer this until config generation?)
moduleData = [[RCTModuleData alloc] initWithModuleClass:moduleClass
bridge:self];
moduleDataByName[moduleName] = moduleData;
[moduleClassesByID addObject:moduleClass];
[moduleDataByID addObject:moduleData];
}
// Store modules
_moduleDataByID = [moduleDataByID copy];
_moduleDataByName = [moduleDataByName copy];
_moduleClassesByID = [moduleClassesByID copy];
RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"");
// Synchronously set up the pre-initialized modules
RCT_PROFILE_BEGIN_EVENT(0, @"extraModules", nil);
for (RCTModuleData *moduleData in _moduleDataByID) {
if (moduleData.hasInstance &&
(!moduleData.requiresMainQueueSetup || RCTIsMainQueue())) {
// Modules that were pre-initialized should ideally be set up before
// bridge init has finished, otherwise the caller may try to access the
// module directly rather than via `[bridge moduleForClass:]`, which won't
// trigger the lazy initialization process. If the module cannot safely be
// set up on the current thread, it will instead be async dispatched
// to the main thread to be set up in the loop below.
(void)[moduleData instance];
}
}
RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"");
// From this point on, RCTDidInitializeModuleNotification notifications will
// be sent the first time a module is accessed.
_moduleSetupComplete = YES;
[self prepareModulesWithDispatchGroup:dispatchGroup];
[_performanceLogger markStopForTag:RCTPLNativeModuleInit];
RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"");
}
- (void)prepareModulesWithDispatchGroup:(dispatch_group_t)dispatchGroup
{
RCT_PROFILE_BEGIN_EVENT(0, @"-[RCTBatchedBridge prepareModulesWithDispatch]", nil);
NSArray<Class> *whitelistedModules = nil;
if ([self.delegate respondsToSelector:@selector(whitelistedModulesForBridge:)]) {
whitelistedModules = [self.delegate whitelistedModulesForBridge:self];
}
BOOL initializeImmediately = NO;
if (dispatchGroup == NULL) {
// If no dispatchGroup is passed in, we must prepare everything immediately.
// We better be on the right thread too.
RCTAssertMainQueue();
initializeImmediately = YES;
} else if ([self.delegate respondsToSelector:@selector(shouldBridgeInitializeNativeModulesSynchronously:)]) {
initializeImmediately = [self.delegate shouldBridgeInitializeNativeModulesSynchronously:self];
}
// Set up modules that require main thread init or constants export
for (RCTModuleData *moduleData in _moduleDataByID) {
if (whitelistedModules && ![whitelistedModules containsObject:[moduleData moduleClass]]) {
continue;
}
if (moduleData.requiresMainQueueSetup || moduleData.hasConstantsToExport) {
// Modules that need to be set up on the main thread cannot be initialized
// lazily when required without doing a dispatch_sync to the main thread,
// which can result in deadlock. To avoid this, we initialize all of these
// modules on the main thread in parallel with loading the JS code, so
// they will already be available before they are ever required.
dispatch_block_t block = ^{
if (self.valid) {
[self->_performanceLogger appendStartForTag:RCTPLNativeModuleMainThread];
(void)[moduleData instance];
[moduleData gatherConstants];
[self->_performanceLogger appendStopForTag:RCTPLNativeModuleMainThread];
}
};
if (initializeImmediately && RCTIsMainQueue()) {
block();
} else {
// We've already checked that dispatchGroup is non-null, but this satisifies the
// Xcode analyzer
if (dispatchGroup) {
dispatch_group_async(dispatchGroup, dispatch_get_main_queue(), block);
}
}
_modulesInitializedOnMainQueue++;
}
}
[_performanceLogger setValue:_modulesInitializedOnMainQueue forTag:RCTPLNativeModuleMainThreadUsesCount];
RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"");
}
- (void)whitelistedModulesDidChange
{
RCTAssertMainQueue();
[self prepareModulesWithDispatchGroup:NULL];
}
- (void)setUpExecutor
{
[_javaScriptExecutor setUp];
}
- (void)registerModuleForFrameUpdates:(id<RCTBridgeModule>)module
withModuleData:(RCTModuleData *)moduleData
{
[_displayLink registerModuleForFrameUpdates:module withModuleData:moduleData];
}
- (NSString *)moduleConfig
{
NSMutableArray<NSArray *> *config = [NSMutableArray new];
for (RCTModuleData *moduleData in _moduleDataByID) {
if (self.executorClass == [RCTJSCExecutor class]) {
[config addObject:@[moduleData.name]];
} else {
[config addObject:RCTNullIfNil(moduleData.config)];
}
}
return RCTJSONStringify(@{
@"remoteModuleConfig": config,
}, NULL);
}
- (void)injectJSONConfiguration:(NSString *)configJSON
onComplete:(void (^)(NSError *))onComplete
{
if (!_valid) {
return;
}
[_javaScriptExecutor injectJSONText:configJSON
asGlobalObjectNamed:@"__fbBatchedBridgeConfig"
callback:onComplete];
}
- (void)executeSourceCode:(NSData *)sourceCode
{
if (!_valid || !_javaScriptExecutor) {
return;
}
RCTSourceCode *sourceCodeModule = [self moduleForClass:[RCTSourceCode class]];
sourceCodeModule.scriptURL = self.bundleURL;
[self enqueueApplicationScript:sourceCode url:self.bundleURL onComplete:^(NSError *loadError) {
if (!self->_valid) {
return;
}
if (loadError) {
RCTLogWarn(@"Failed to execute source code: %@", [loadError localizedDescription]);
dispatch_async(dispatch_get_main_queue(), ^{
[self stopLoadingWithError:loadError];
});
return;
}
// Register the display link to start sending js calls after everything is setup
NSRunLoop *targetRunLoop = [self->_javaScriptExecutor isKindOfClass:[RCTJSCExecutor class]] ? [NSRunLoop currentRunLoop] : [NSRunLoop mainRunLoop];
[self->_displayLink addToRunLoop:targetRunLoop];
// Log metrics about native requires during the bridge startup.
uint64_t nativeRequiresCount = [self->_performanceLogger valueForTag:RCTPLRAMNativeRequiresCount];
[self->_performanceLogger setValue:nativeRequiresCount forTag:RCTPLRAMStartupNativeRequiresCount];
uint64_t nativeRequires = [self->_performanceLogger valueForTag:RCTPLRAMNativeRequires];
[self->_performanceLogger setValue:nativeRequires forTag:RCTPLRAMStartupNativeRequires];
[self->_performanceLogger markStopForTag:RCTPLBridgeStartup];
// Perform the notification on the main thread, so we can't run into
// timing issues with RCTRootView
dispatch_async(dispatch_get_main_queue(), ^{
[[NSNotificationCenter defaultCenter]
postNotificationName:RCTJavaScriptDidLoadNotification
object:self->_parentBridge userInfo:@{@"bridge": self}];
});
[self _flushPendingCalls];
}];
#if RCT_DEV
if ([RCTGetURLQueryParam(self.bundleURL, @"hot") boolValue]) {
NSString *path = [self.bundleURL.path substringFromIndex:1]; // strip initial slash
NSString *host = self.bundleURL.host;
NSNumber *port = self.bundleURL.port;
[self enqueueJSCall:@"HMRClient"
method:@"enable"
args:@[@"ios", path, host, RCTNullIfNil(port)]
completion:NULL];
}
#endif
}
- (void)_flushPendingCalls
{
RCTAssertJSThread();
RCT_PROFILE_BEGIN_EVENT(0, @"Processing pendingCalls", @{ @"count": @(_pendingCalls.count) });
_loading = NO;
NSArray *pendingCalls = _pendingCalls;
_pendingCalls = nil;
for (dispatch_block_t call in pendingCalls) {
call();
}
RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"");
}
- (void)stopLoadingWithError:(NSError *)error
{
RCTAssertMainQueue();
if (!_valid || !_loading) {
return;
}
_loading = NO;
[_javaScriptExecutor invalidate];
[[NSNotificationCenter defaultCenter]
postNotificationName:RCTJavaScriptDidFailToLoadNotification
object:_parentBridge userInfo:@{@"bridge": self, @"error": error}];
if ([error userInfo][RCTJSStackTraceKey]) {
[self.redBox showErrorMessage:[error localizedDescription]
withStack:[error userInfo][RCTJSStackTraceKey]];
}
RCTFatal(error);
}
RCT_NOT_IMPLEMENTED(- (instancetype)initWithBundleURL:(__unused NSURL *)bundleURL
moduleProvider:(__unused RCTBridgeModuleProviderBlock)block
launchOptions:(__unused NSDictionary *)launchOptions)
/**
* Prevent super from calling setUp (that'd create another batchedBridge)
*/
- (void)setUp {}
- (void)bindKeys {}
- (void)reload
{
[_parentBridge reload];
}
- (void)requestReload
{
[_parentBridge requestReload];
}
- (Class)executorClass
{
return _parentBridge.executorClass ?: [RCTJSCExecutor class];
}
- (void)setExecutorClass:(Class)executorClass
{
RCTAssertMainQueue();
_parentBridge.executorClass = executorClass;
}
- (NSURL *)bundleURL
{
return _parentBridge.bundleURL;
}
- (void)setBundleURL:(NSURL *)bundleURL
{
_parentBridge.bundleURL = bundleURL;
}
- (id<RCTBridgeDelegate>)delegate
{
return _parentBridge.delegate;
}
- (BOOL)isLoading
{
return _loading;
}
- (BOOL)isValid
{
return _valid;
}
- (void)dispatchBlock:(dispatch_block_t)block
queue:(dispatch_queue_t)queue
{
if (queue == RCTJSThread) {
RCTProfileBeginFlowEvent();
RCTAssert(_javaScriptExecutor != nil, @"Need JS executor to schedule JS work");
[_javaScriptExecutor executeBlockOnJavaScriptQueue:^{
RCTProfileEndFlowEvent();
RCT_PROFILE_BEGIN_EVENT(0, @"-[RCTBatchedBridge dispatchBlock", @{ @"loading": @(self.loading) });
if (self.loading) {
RCTAssert(self->_pendingCalls != nil, @"Can't add pending call, bridge is no longer loading");
[self->_pendingCalls addObject:block];
} else {
block();
}
RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"");
}];
} else if (queue) {
dispatch_async(queue, block);
}
}
#pragma mark - RCTInvalidating
- (void)invalidate
{
if (!_valid) {
return;
}
RCTAssertMainQueue();
RCTAssert(_javaScriptExecutor != nil, @"Can't complete invalidation without a JS executor");
_loading = NO;
_valid = NO;
if ([RCTBridge currentBridge] == self) {
[RCTBridge setCurrentBridge:nil];
}
// Invalidate modules
dispatch_group_t group = dispatch_group_create();
for (RCTModuleData *moduleData in _moduleDataByID) {
// Be careful when grabbing an instance here, we don't want to instantiate
// any modules just to invalidate them.
id<RCTBridgeModule> instance = nil;
if ([moduleData hasInstance]) {
instance = moduleData.instance;
}
if (instance == _javaScriptExecutor) {
continue;
}
if ([instance respondsToSelector:@selector(invalidate)]) {
dispatch_group_enter(group);
[self dispatchBlock:^{
[(id<RCTInvalidating>)instance invalidate];
dispatch_group_leave(group);
} queue:moduleData.methodQueue];
}
[moduleData invalidate];
}
dispatch_group_notify(group, dispatch_get_main_queue(), ^{
[self->_javaScriptExecutor executeBlockOnJavaScriptQueue:^{
[self->_displayLink invalidate];
self->_displayLink = nil;
[self->_javaScriptExecutor invalidate];
self->_javaScriptExecutor = nil;
if (RCTProfileIsProfiling()) {
RCTProfileUnhookModules(self);
}
self->_moduleDataByName = nil;
self->_moduleDataByID = nil;
self->_moduleClassesByID = nil;
self->_pendingCalls = nil;
if (self->_flowIDMap != NULL) {
CFRelease(self->_flowIDMap);
}
}];
});
}
- (void)logMessage:(NSString *)message level:(NSString *)level
{
if (RCT_DEBUG && [_javaScriptExecutor isValid]) {
[self enqueueJSCall:@"RCTLog"
method:@"logIfNoNativeHook"
args:@[level, message]
completion:NULL];
}
}
#pragma mark - RCTBridge methods
/**
* Public. Can be invoked from any thread.
*/
- (void)enqueueJSCall:(NSString *)module method:(NSString *)method args:(NSArray *)args completion:(dispatch_block_t)completion
{
/**
* AnyThread
*/
if (!_valid) {
return;
}
RCT_PROFILE_BEGIN_EVENT(RCTProfileTagAlways, @"-[RCTBatchedBridge enqueueJSCall:]", nil);
__weak __typeof(self) weakSelf = self;
[self dispatchBlock:^{
[weakSelf _actuallyInvokeAndProcessModule:module method:method arguments:args ?: @[]];
if (completion) {
completion();
}
} queue:RCTJSThread];
RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"");
}
/**
* Called by RCTModuleMethod from any thread.
*/
- (void)enqueueCallback:(NSNumber *)cbID args:(NSArray *)args
{
/**
* AnyThread
*/
if (!_valid) {
return;
}
__weak __typeof(self) weakSelf = self;
[self dispatchBlock:^{
[weakSelf _actuallyInvokeCallback:cbID arguments:args];
} queue:RCTJSThread];
}
/**
* JS thread only
*/
- (JSValue *)callFunctionOnModule:(NSString *)module
method:(NSString *)method
arguments:(NSArray *)arguments
error:(NSError **)error
{
RCTJSCExecutor *jsExecutor = (RCTJSCExecutor *)_javaScriptExecutor;
if (![jsExecutor isKindOfClass:[RCTJSCExecutor class]]) {
RCTLogWarn(@"FBReactBridgeJSExecutor is only supported when running in JSC");
return nil;
}
__block JSValue *jsResult = nil;
RCTAssertJSThread();
RCT_PROFILE_BEGIN_EVENT(0, @"callFunctionOnModule", (@{ @"module": module, @"method": method }));
[jsExecutor callFunctionOnModule:module
method:method
arguments:arguments ?: @[]
jsValueCallback:^(JSValue *result, NSError *jsError) {
if (error) {
*error = jsError;
}
JSValue *length = result[@"length"];
RCTAssert([length isNumber] && [length toUInt32] == 2,
@"Return value of a callFunction must be an array of size 2");
jsResult = [result valueAtIndex:0];
NSArray *nativeModuleCalls = [[result valueAtIndex:1] toArray];
[self handleBuffer:nativeModuleCalls batchEnded:YES];
}];
RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"js_call");
return jsResult;
}
/**
* Private hack to support `setTimeout(fn, 0)`
*/
- (void)_immediatelyCallTimer:(NSNumber *)timer
{
RCTAssertJSThread();
[_javaScriptExecutor executeAsyncBlockOnJavaScriptQueue:^{
[self _actuallyInvokeAndProcessModule:@"JSTimersExecution"
method:@"callTimers"
arguments:@[@[timer]]];
}];
}
- (void)enqueueApplicationScript:(NSData *)script
url:(NSURL *)url
onComplete:(RCTJavaScriptCompleteBlock)onComplete
{
RCTAssert(onComplete != nil, @"onComplete block passed in should be non-nil");
RCTProfileBeginFlowEvent();
[_javaScriptExecutor executeApplicationScript:script sourceURL:url onComplete:^(NSError *scriptLoadError) {
RCTProfileEndFlowEvent();
RCTAssertJSThread();
if (scriptLoadError) {
onComplete(scriptLoadError);
return;
}
RCT_PROFILE_BEGIN_EVENT(RCTProfileTagAlways, @"FetchApplicationScriptCallbacks", nil);
[self->_javaScriptExecutor flushedQueue:^(id json, NSError *error)
{
RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"js_call,init");
[self handleBuffer:json batchEnded:YES];
onComplete(error);
}];
}];
}
#pragma mark - Payload Generation
- (void)_actuallyInvokeAndProcessModule:(NSString *)module
method:(NSString *)method
arguments:(NSArray *)args
{
RCTAssertJSThread();
__weak __typeof(self) weakSelf = self;
[_javaScriptExecutor callFunctionOnModule:module
method:method
arguments:args
callback:^(id json, NSError *error) {
[weakSelf _processResponse:json error:error];
}];
}
- (void)_actuallyInvokeCallback:(NSNumber *)cbID
arguments:(NSArray *)args
{
RCTAssertJSThread();
__weak __typeof(self) weakSelf = self;
[_javaScriptExecutor invokeCallbackID:cbID
arguments:args
callback:^(id json, NSError *error) {
[weakSelf _processResponse:json error:error];
}];
}
- (void)_processResponse:(id)json error:(NSError *)error
{
if (error) {
if ([error userInfo][RCTJSStackTraceKey]) {
[self.redBox showErrorMessage:[error localizedDescription]
withStack:[error userInfo][RCTJSStackTraceKey]];
}
RCTFatal(error);
}
if (!_valid) {
return;
}
[self handleBuffer:json batchEnded:YES];
}
#pragma mark - Payload Processing
- (void)handleBuffer:(id)buffer batchEnded:(BOOL)batchEnded
{
RCTAssertJSThread();
if (buffer != nil && buffer != (id)kCFNull) {
_wasBatchActive = YES;
[self handleBuffer:buffer];
[self partialBatchDidFlush];
}
if (batchEnded) {
if (_wasBatchActive) {
[self batchDidComplete];
}
_wasBatchActive = NO;
}
}
- (void)handleBuffer:(NSArray *)buffer
{
NSArray *requestsArray = [RCTConvert NSArray:buffer];
if (RCT_DEBUG && requestsArray.count <= RCTBridgeFieldParams) {
RCTLogError(@"Buffer should contain at least %tu sub-arrays. Only found %tu",
RCTBridgeFieldParams + 1, requestsArray.count);
return;
}
NSArray<NSNumber *> *moduleIDs = [RCTConvert NSNumberArray:requestsArray[RCTBridgeFieldRequestModuleIDs]];
NSArray<NSNumber *> *methodIDs = [RCTConvert NSNumberArray:requestsArray[RCTBridgeFieldMethodIDs]];
NSArray<NSArray *> *paramsArrays = [RCTConvert NSArrayArray:requestsArray[RCTBridgeFieldParams]];
int64_t callID = -1;
if (requestsArray.count > 3) {
callID = [requestsArray[RCTBridgeFieldCallID] longLongValue];
}
if (RCT_DEBUG && (moduleIDs.count != methodIDs.count || moduleIDs.count != paramsArrays.count)) {
RCTLogError(@"Invalid data message - all must be length: %zd", moduleIDs.count);
return;
}
NSMapTable *buckets = [[NSMapTable alloc] initWithKeyOptions:NSPointerFunctionsStrongMemory
valueOptions:NSPointerFunctionsStrongMemory
capacity:_moduleDataByName.count];
[moduleIDs enumerateObjectsUsingBlock:^(NSNumber *moduleID, NSUInteger i, __unused BOOL *stop) {
RCTModuleData *moduleData = self->_moduleDataByID[moduleID.integerValue];
dispatch_queue_t queue = moduleData.methodQueue;
NSMutableOrderedSet<NSNumber *> *set = [buckets objectForKey:queue];
if (!set) {
set = [NSMutableOrderedSet new];
[buckets setObject:set forKey:queue];
}
[set addObject:@(i)];
}];
for (dispatch_queue_t queue in buckets) {
RCTProfileBeginFlowEvent();
dispatch_block_t block = ^{
RCTProfileEndFlowEvent();
NSOrderedSet *calls = [buckets objectForKey:queue];
RCT_PROFILE_BEGIN_EVENT(RCTProfileTagAlways, @"-[RCTBatchedBridge handleBuffer:]", (@{
@"calls": @(calls.count),
}));
@autoreleasepool {
for (NSNumber *indexObj in calls) {
NSUInteger index = indexObj.unsignedIntegerValue;
#if RCT_PROFILE
if (RCT_DEV && callID != -1 && self->_flowIDMap != NULL && RCTProfileIsProfiling()) {
[self.flowIDMapLock lock];
NSUInteger newFlowID = (NSUInteger)CFDictionaryGetValue(self->_flowIDMap, (const void *)(self->_flowID + index));
_RCTProfileEndFlowEvent(newFlowID);
CFDictionaryRemoveValue(self->_flowIDMap, (const void *)(self->_flowID + index));
[self.flowIDMapLock unlock];
}
#endif
[self callNativeModule:[moduleIDs[index] integerValue]
method:[methodIDs[index] integerValue]
params:paramsArrays[index]];
}
}
RCT_PROFILE_END_EVENT(RCTProfileTagAlways, @"objc_call,dispatch_async");
};
[self dispatchBlock:block queue:queue];
}
_flowID = callID;
}
- (void)partialBatchDidFlush
{
for (RCTModuleData *moduleData in _moduleDataByID) {
if (moduleData.hasInstance && moduleData.implementsPartialBatchDidFlush) {
[self dispatchBlock:^{
[moduleData.instance partialBatchDidFlush];
} queue:moduleData.methodQueue];
}
}
}
- (void)batchDidComplete
{
// TODO: batchDidComplete is only used by RCTUIManager - can we eliminate this special case?
for (RCTModuleData *moduleData in _moduleDataByID) {
if (moduleData.hasInstance && moduleData.implementsBatchDidComplete) {
[self dispatchBlock:^{
[moduleData.instance batchDidComplete];
} queue:moduleData.methodQueue];
}
}
}
- (id)callNativeModule:(NSUInteger)moduleID
method:(NSUInteger)methodID
params:(NSArray *)params
{
if (!_valid) {
return nil;
}
RCTModuleData *moduleData = _moduleDataByID[moduleID];
if (RCT_DEBUG && !moduleData) {
RCTLogError(@"No module found for id '%zd'", moduleID);
return nil;
}
id<RCTBridgeMethod> method = moduleData.methods[methodID];
if (RCT_DEBUG && !method) {
RCTLogError(@"Unknown methodID: %zd for module: %zd (%@)", methodID, moduleID, moduleData.name);
return nil;
}
@try {
return [method invokeWithBridge:self module:moduleData.instance arguments:params];
}
@catch (NSException *exception) {
// Pass on JS exceptions
if ([exception.name hasPrefix:RCTFatalExceptionName]) {
@throw exception;
}
NSString *message = [NSString stringWithFormat:
@"Exception '%@' was thrown while invoking %@ on target %@ with params %@",
exception, method.JSMethodName, moduleData.name, params];
RCTFatal(RCTErrorWithMessage(message));
return nil;
}
}
- (void)startProfiling
{
RCTAssertMainQueue();
[_javaScriptExecutor executeBlockOnJavaScriptQueue:^{
RCTProfileInit(self);
}];
}
- (void)stopProfiling:(void (^)(NSData *))callback
{
RCTAssertMainQueue();
[_javaScriptExecutor executeBlockOnJavaScriptQueue:^{
RCTProfileEnd(self, ^(NSString *log) {
NSData *logData = [log dataUsingEncoding:NSUTF8StringEncoding];
callback(logData);
});
}];
}
- (BOOL)isBatchActive
{
return _wasBatchActive;
}
@end
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