annidy

libdispatch efficiency tips

I suspect most developers are using the libdispatch inefficiently due to the way it was presented to us at the time it was introduced and for many years after that, and due to the confusing documentation and API. I realized this after reading the 'concurrency' discussion on the swift-evolution mailing-list, in particular the messages from Pierre Habouzit (who is the libdispatch maintainer at Apple) are quite enlightening (and you can also find many tweets from him on the subject).

• https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20170828/date.html
• https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20170904/date.html
• https://twitter.com/pedantcoder

My take-aways are:

annidy

//Copyright (c) 2018 Michael Eisel. All rights reserved.

#import "CLRCallRecorder.h"
#import <dlfcn.h>
#import <libkern/OSAtomicQueue.h>
#import <pthread.h>

typedef struct {
    void *ptr;
    NSInteger number;

annidy

#*******************************************************************************#
# BinaryCookieReader: Written By Satishb3 (http://www.securitylearn.net)        #
#                                                                               #
# For any bug fixes contact me: satishb3@securitylearn.net                      #
#                                                                               #
# Usage: Python BinaryCookieReader.py Cookie.Binarycookies-FilePath             #
#                                                                               #
# Safari browser and iOS applications store the persistent cookies in a binary  #
# file names Cookies.binarycookies.BinaryCookieReader is used to dump all the   #
# cookies from the binary Cookies.binarycookies file.                           #

annidy

#!/usr/bin/env ruby
# This script currently only works if you have your derived data in the default location.

# Get the workspace name to search for, or exit with code 1 if no value in envariable
xcodeWorkspacePath = ENV["XcodeWorkspacePath"] || exit(1)
projectName = xcodeWorkspacePath[%r{/(\w+)\.xcodeproj}, 1]

#Get the folders in derived data that could match the workspace
derived_data = File.expand_path("~/Library/Developer/Xcode/DerivedData")
# Glob out the files matching our project

annidy

//cc -Wextra -o build/dump-header-map dump-header-map.c
// see: https://github.com/llvm-mirror/clang/blob/release_40/include/clang/Lex/HeaderMapTypes.h
// https://github.com/llvm-mirror/clang/blob/release_40/include/clang/Lex/HeaderMap.h// https://github.com/llvm-mirror/clang/blob/release_40/lib/Lex/HeaderMap.cpp

// This is basically dump() from there.

#include <stdio.h>
#include <stdlib.h>
#include <sysexits.h>
#include <err.h>

annidy

//Both implementations thanks to https://useyourloaf.com/blog/how-to-percent-encode-a-url-string/
//Upgraded/cleaned up for Swift 4

Extension String {
    func percentEncodedForRFC3986() -> String? {
        let unreserved = "-._~/?"
        var allowed = CharacterSet.alphanumerics
        allowed.insert(charactersIn: unreserved)
        return self.addingPercentEncoding(withAllowedCharacters: allowed)
    }

annidy

#! /usr/bin/env python3
# -*- coding: utf-8 -*-

import ctypes
from ctypes import wintypes

class SYSTEM_POWER_STATUS(ctypes.Structure):
    _fields_ = [
        ('ACLineStatus', wintypes.BYTE),
        ('BatteryFlag', wintypes.BYTE),