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@algal
algal / vmstatistics64.swift
Last active August 16, 2022 07:45
Get virtual memory usage on iOS or macOS
import Darwin
import Foundation
// known good: Swift 5
// runs on macOS, probably works on iOS (but haven't tried)
/// Wraps `host_statistics64`, and provides info on virtual memory
///
/// - Returns: a `vm_statistics64`, or nil if the kernel reported an error
///
#import "fishhook.h" // from https://github.com/facebook/fishhook
// Replace write and writev, the two "chokepoint" functions that writes to stderr and stdout will probably pass through
static int (*originalWritev)(int fd, const struct iovec *v, int n);
static int (*originalWrite)(int fd, const void *buf, size_t size);
void checkForBadConstraintsMessage(int fd, const char *string, size_t size) {
if (strnstr(string, "UIViewAlertForUnsatisfiableConstraints", size)) {
// Write it to the console anyways before crashing
originalWrite(fd, string, size);
This file has been truncated, but you can view the full file.
//
// Generated by class-dump 3.5 (64 bit).
//
// class-dump is Copyright (C) 1997-1998, 2000-2001, 2004-2015 by Steve Nygard.
//
#pragma mark Blocks
typedef void (^CDUnknownBlockType)(void); // return type and parameters are unknown
@netsmertia
netsmertia / main.dart
Created May 4, 2018 13:53
flutter image drawing in canvas
import 'package:flutter/material.dart';
import 'dart:ui' as ui;
import 'package:flutter/services.dart' show rootBundle;
import 'dart:async';
import 'dart:typed_data';
void main() => runApp(new MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@tclementdev
tclementdev / libdispatch-efficiency-tips.md
Last active July 12, 2024 03:33
Making efficient use of the libdispatch (GCD)

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

  • You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

  • Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

@DerekSelander
DerekSelander / dsresign
Last active April 16, 2023 02:26
Resign iOS .app directories, expects app dir, provisioning profile, [optional] new name for iOS app
#!/bin/bash
# MIT License
#
# Copyright (c) 2018 Derek Selander (@LOLgrep)
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
@fousa
fousa / FairPlayer.swift
Last active June 1, 2023 12:28
Integrate HLS with FairPlay.
class FairPlayer: AVPlayer {
private let queue = DispatchQueue(label: "com.icapps.fairplay.queue")
func play(asset: AVURLAsset) {
// Set the resource loader delegate to this class. The `resourceLoader`'s delegate will be
// triggered when FairPlay handling is required.
asset.resourceLoader.setDelegate(self, queue: queue)
// Load the asset in the player.
anonymous
anonymous / GAME_MASTER_v0_1.protobuf
Created July 16, 2016 16:31
Pokemon Go decoded GAME_MASTER protobuf file v0.1
Result: 1
Items {
TemplateId: "BADGE_BATTLE_ATTACK_WON"
Badge {
BadgeType: BADGE_BATTLE_ATTACK_WON
BadgeRanks: 4
Targets: "\nd\350\007"
}
}
Items {
# 你可以从该 URL 下载这个配置文件: http://surge.run/config-example/ios.conf
# 用编辑器编辑后,再通过 iTunes, URL, AirDrop 或者 iCloud Drive 复制回 iOS 设备
# Version 2.0
[General]
# 日志等级: warning, notify, info, verbose (默认值: notify)
loglevel = notify
# 跳过某个域名或者 IP 段,这些目标主机将不会由 Surge Proxy 处理。(在 macOS
# 版本中,如果启用了 Set as System Proxy, 那么这些值会被写入到系统网络代理
# 设置中.)
@steipete
steipete / ios-xcode-device-support.sh
Last active July 13, 2024 21:09
Using iOS 15 devices with Xcode 12.5 (instead of Xcode 13)
# The trick is to link the DeviceSupport folder from the beta to the stable version.
# sudo needed if you run the Mac App Store version. Always download the dmg instead... you'll thank me later :)
# Support iOS 15 devices (Xcode 13.0) with Xcode 12.5:
sudo ln -s /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/15.0 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport
# Then restart Xcode and reconnect your devices. You will need to do that for every beta of future iOS versions
# (A similar approach works for older versions too, just change the version number after DeviceSupport)