mirror of https://github.com/oxen-io/session-ios
Resolve more errors
Niels Andriesse
4 years ago
parent
b7c6dba0f3
commit
53a8c9fd57
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//
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// Copyright (c) 2020 Open Whisper Systems. All rights reserved.
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//
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#import <Foundation/Foundation.h>
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NS_ASSUME_NONNULL_BEGIN
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@class DarwinNotificationName;
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extern const int DarwinNotificationInvalidObserver;
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@interface DarwinNotificationCenter : NSObject
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/// Determines if an observer token is valid for a current registration.
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/// Negative integers are never valid. A positive or zero value is valid
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/// if the current process has a registration associated with the given value.
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/// @param observerToken The token returned by `addObserverForName:`
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+ (BOOL)isValidObserver:(int)observerToken;
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/// Post a darwin notification that can be listened for from other processes.
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/// @param name The name of the notification to post.
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+ (void)postNotificationName:(DarwinNotificationName *)name;
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/// Add an observer for a darwin notification of the given name.
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/// @param name The name of the notification to listen for.
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/// @param queue The queue to callback on.
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/// @param block The block to callback. Includes the observer token as an input parameter to allow
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/// removing the observer after receipt.
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/// @return An `int` observer token that can be used to remove this observer.
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+ (int)addObserverForName:(DarwinNotificationName *)name queue:(dispatch_queue_t)queue usingBlock:(void (^)(int))block;
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/// Stops listening for notifications registered by the given observer token.
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/// @param observerToken The token returned by `addObserverForName:` for the notification you want to stop listening
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/// for.
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+ (void)removeObserver:(int)observerToken;
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/// Sets the state value for a given observer. This value can be set and read from
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/// any process listening for this notification. Note: `setState:` and `getState`
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/// are vulnerable to races.
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/// @param state The `uint64_t` state you wish to share with another process.
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/// @param observerToken The token returned by `addObserverForName:` for the notification you want to set state for.
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+ (void)setState:(uint64_t)state forObserver:(int)observerToken;
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/// Retrieves the state for a given observer. This value can be set and read from
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/// any process listening for this notification. Note: `setState:` and `getState`
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/// are vulnerable to races.
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/// @param observerToken The token returned by `addObserverForName:` for the notification you want to get state for.
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+ (uint64_t)getStateForObserver:(int)observerToken;
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@end
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NS_ASSUME_NONNULL_END
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@ -0,0 +1,61 @@
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//
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// Copyright (c) 2021 Open Whisper Systems. All rights reserved.
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//
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#import <SessionUtilitiesKit/DarwinNotificationCenter.h>
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#import <SessionUtilitiesKit/SessionUtilitiesKit-Swift.h>
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#import <notify.h>
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const int DarwinNotificationInvalidObserver = NOTIFY_TOKEN_INVALID;
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@implementation DarwinNotificationCenter
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+ (BOOL)isValidObserver:(int)observerToken
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{
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return notify_is_valid_token(observerToken);
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}
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+ (void)postNotificationName:(DarwinNotificationName *)name
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{
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notify_post((const char *)name.cString);
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}
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+ (int)addObserverForName:(DarwinNotificationName *)name
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queue:(dispatch_queue_t)queue
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usingBlock:(notify_handler_t)block
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{
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int observerToken;
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notify_register_dispatch((const char *)name.cString, &observerToken, queue, block);
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return observerToken;
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}
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+ (void)removeObserver:(int)observerToken
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{
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if (![self isValidObserver:observerToken]) {
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return;
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}
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notify_cancel(observerToken);
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}
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+ (void)setState:(uint64_t)state forObserver:(int)observerToken
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{
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if (![self isValidObserver:observerToken]) {
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return;
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}
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notify_set_state(observerToken, state);
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}
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+ (uint64_t)getStateForObserver:(int)observerToken
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{
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if (![self isValidObserver:observerToken]) {
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return 0;
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}
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uint64_t state;
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notify_get_state(observerToken, &state);
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return state;
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}
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@end
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@ -0,0 +1,45 @@
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//
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// Copyright (c) 2021 Open Whisper Systems. All rights reserved.
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//
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import Foundation
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@objc
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public class DarwinNotificationName: NSObject, ExpressibleByStringLiteral {
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@objc public static let sdsCrossProcess: DarwinNotificationName = "org.signal.sdscrossprocess"
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@objc public static let nseDidReceiveNotification: DarwinNotificationName = "org.signal.nseDidReceiveNotification"
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@objc public static let mainAppHandledNotification: DarwinNotificationName = "org.signal.mainAppHandledNotification"
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@objc public static let mainAppLaunched: DarwinNotificationName = "org.signal.mainAppLaunched"
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public typealias StringLiteralType = String
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private let stringValue: String
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@objc
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public var cString: UnsafePointer<Int8> {
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return stringValue.withCString { $0 }
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}
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@objc
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public var isValid: Bool {
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return stringValue.isEmpty == false
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}
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public required init(stringLiteral value: String) {
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stringValue = value
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}
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@objc
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public init(_ name: String) {
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stringValue = name
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}
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public override func isEqual(_ object: Any?) -> Bool {
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guard let otherName = object as? DarwinNotificationName else { return false }
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return otherName.stringValue == stringValue
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}
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public override var hash: Int {
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return stringValue.hashValue
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}
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}
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