A list of code examples used in class and any board work or other artifacts I create during class. This page generally will be added to shortly before or shortly after the class (or sometime both).

2024-10-17

• what I wrote in class (pdf)

2024-10-15

• The Kitchen Sync, a narrative exploration of synchronization primitives.
• Life in a windowless room, a narrative exploration of how processes and context switches work. In it, Oz represents the kernel, the board represents system calls, and the house represents a processor and its memory.
• what I wrote in class (pdf)

2024-10-10

Demo files matching the sections in our Python page; also available as a zip file

• 17-args.py
• 18-annotation.py
• 19-class.py
• 20-nothis.py
• 21-comprehensions.py
• 22-generators.py
• 23-closure.py
• 24-async.py
• 25-decorators.py – I added this late so it’s not yet in the .zip file

Also an example of a race condition in Python: racecondition

• what I wrote in class (pdf)

2024-10-08

Demo files matching the sections in our Python page; also available as a zip file

• 01-types.py
• 02-decl.py
• 03-scope.py
• 04-perf.py
• 05-mutable.py
• 06-unwrap.py
• 07-bytes.py
• 08-strlit.py
• 09-docstr.py
• 10-hashes.py
• 11-values.py
• 12-types.py
• 13-int.py
• 14-complex.py
• 15-div.py
• 16-retval.py
• 17-args.py

2024-10-03

• mp5startercode.c creates a socket listener and detached threads.

  In class I added this code to client_thread:

  while(1) {
      char buffer[4096+1];
      ssize_t got = read(fd, buffer, 4096);
      buffer[got] = '\0';
      printf("Buffer: %s (%ld)\n", buffer, got);
      write(fd, "Thank you for your message!\n", strlen("Thank you for your message!\n"));
  }

  In class I also had trouble running telnet in the docker image. Here’s the steps to use it:

  1. either (once) add telnet to the line that currently says make in your Dockerfile and then select Rebuild container in the remote menu in VS Code

     or (each time you start docker) run apt update; apt install telnet from the command line.

  2. From the docker command line, run telnet localhost 1234, replacing 1234 with the port you want to use.

• what I wrote in class (pdf)

2024-09-26

• what I wrote in class (pdf)
• what I typed in class (txt)

2024-09-24

• what I wrote in class (pdf)

2024-09-19

• stack-memory.c demonstrates both valid and invalid use of stack memory and the sizeof operator.
• global-memory.c demonstrates both valid and invalid use of global memory and const.
• what I wrote in class (pdf)

2024-09-17

• mem-undefined.c a variety of mostly-undefined-behavior memory operations.
• what I wrote in class (pdf)
• what I typed in class (txt)

2024-09-12

• what I wrote in class (pdf)

2024-09-10

• assembly code (html)
• vmtest.c which demonstrates virtual memory working.
• cachetest.c which demonstrates the memory cache working.
• what I wrote in class (pdf)

2024-09-05

• what I wrote in class (pdf)

2024-09-03

• what I wrote in class (pdf)

2024-08-29

• memory-inspector.c, for viewing bytes stored in anything.
• char twoOTheBits(char c) { return (c>>5)&3; }
• what I wrote in class (pdf)

2024-08-27

• what I wrote in class (pdf)
• questions I was asked (txt)