react-native/React/Base/RCTReloadCommand.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 "RCTReloadCommand.h"
#import "RCTKeyCommands.h"
void RCTRegisterReloadCommandListener(id<RCTReloadListener> listener)
{
static NSHashTable<id<RCTReloadListener>> *listeners;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
listeners = [NSHashTable weakObjectsHashTable];
[[RCTKeyCommands sharedInstance] registerKeyCommandWithInput:@"r"
modifierFlags:UIKeyModifierCommand
action:
^(__unused UIKeyCommand *command) {
NSArray<id<RCTReloadListener>> *copiedListeners;
@synchronized (listeners) { // avoid mutation-while-enumerating
copiedListeners = [listeners allObjects];
}
for (id<RCTReloadListener> l in copiedListeners) {
[l didReceiveReloadCommand];
}
}];
});
@synchronized (listeners) {
[listeners addObject:listener];
}
}