Amir Omidi aaomidi

Keybase proof

I hereby claim:

I am aaomidi on github.
I am aaomidi (https://keybase.io/aaomidi) on keybase.
I have a public key whose fingerprint is B250 0DD4 7A81 DBF0 6BE5 7DE5 BB2F F979 8085 5946

To claim this, I am signing this object:

CS370

Midterm

Question 1

Suppose as a programmer you have three options for providing mutual exclusion: disabling interrupts, a spin lock, and semaphores. What considerations would go into your decision for choosing one over the others?

Interrupt Control:

It simply does not allow the OS to preempt processes. If we're given one choice of these to provide mutex, this would, simply, be the worst idea possible. It could allow any process take over the entire CPU. For safety and santiy's sake this should be avoided.

There's been some active discussion on "Is this the switch expression construct we're looking for" over on amber-dev. Its a good time to take stock of where we are, and identifying any loose ends.

Approach

Our approach is driven not merely by the desire to have an expression form of switch, but to make switch more generally useful as a multi-way conditional construct. The biggest driver here of course is making it work well with pattern matching. Pattern matching is a driver for better

	webm
	mkv
	flv
	vob
	ogv
	ogg
	rrc
	gifv
	mng
	mov

	server {
	listen 443 ssl;
	server_name septa.aaomidi.com;

	access_log /web/logs/aaomidi-septa-https-access.log;
	error_log /web/logs/aaomidi-septa-https-error.log;

	ssl_certificate /etc/ssl/certs/ssl-cert-snakeoil.pem;
	ssl_certificate_key /etc/ssl/private/ssl-cert-snakeoil.key;

	-----BEGIN PGP PUBLIC KEY BLOCK-----
	Version: GnuPG v2

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	m1jw28YVM9tcRgQgknLdeDHZ78wgTmq9I5KB7R9o477IXDAFmPG5hTN9Ny/RlXNx
	gW5yk6IMq+WTEryeLFvR7chQ6udZLx+/4zWzljsD6RyO/SN35Y034ZhBjN+6SVrt
	MdaUNo2AnYNGV9TBvdjf3I0vAv9pF7KvNtsqB2MekjD2GQObfKwwWZSxAo8bIOYk
	UcMe8pEQKLnSborQXZMBUl00yFtydxrGEcNdqap3LQd+y5gxDi7KEOVyddL7wIdg
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	HC02VcLVgO3lWJ2+yhjOgXldmJzEIlTg8/lGODQ6S9NdALh0q3/fWMh6swKqo7Zm

	##
	# Hardware Based (Very high security)
	##
	# Yubikey 1
	ssh-rsa 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 cardno:000605448660
	# Yubikey 2 (Backup)
	ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAACAQCdRy4x2QdmnJje3FgsoZPW/x0Aw1J7I8aqCFih/NyP5sLTBxzs0uwC+JvREXFljS8w89d9upFgCCkQgX/Jk4SHcnutDP+tErMYzOaHD2SCVztqHfTcwUL+WYbTMAhvw671YrrmxvjUjTQ5afj7RZ6AaKS3B4XWP3Y0Cj


	public abstract class AbstractClass {

	public void printClass() {
	System.out.println(this.getClass().getName());
	System.out.println(getClass().getName());
	}
	}

	<?xml version="1.0" encoding="UTF-8"?>
	<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
	<plist version="1.0">
	<dict>
	<key>Subnets</key>
	<array>
	<dict>
	<key>allocate</key>
	<true/>
	<key>dhcp_domain_name_server</key>