erltest

My Erlang/OTP learning experiments.

• test1.erl: Some trivial exercises with Erlang functions.
• proc1.erl: Some trivial distributed Erlang processes including a Poisson process.

My wxErlang learning experiments.

• wx1.erl: A minimal wxErlang application to see how it works.
• mobsim1.erl: A trivial mobile object simulation using wxErlang.
• mobsim2.erl: Development module for simulation of a simple mobile network.
• mobsim3.erl: Version 3 of mobile network simulation. Added server-side display list, double buffering, window re-painting, multiple options for node appearance, and some trace filtering options.

My gen_server learning experiments.

• gs1a.erl, gs1b.erl, gs1c.erl: Modules A, B and C to dissect and investigate the gen_server concept.
  • Call chain: Erlang shell <==> A <==> GS-module <--> GS-daemon <==> B <==> C.
    • Erlang shell: erl
    • Module A: gs1a.erl
    • GS-module: gen_server.erl
    • GS-daemon: proc_lib.erl (the "gen_server process")
    • Module B: gs1b.erl (the "callback module")
    • Module C: gs1c.erl
  • Module A converts Erlang shell commands to calls to the GS-module.
  • Module B is the "callback module" which handles the GS-daemon's calls.
  • Module C provides some basic low-level functions to Module B for demonstration purposes.
  • The GS-daemon is called a "gen_server process" in the Erlang/OTP documentation.
  • Communication between the GS-module and GS-daemon uses inter-process messages.
  • The other links use plain function calls.
  • The Erlang/OTP documentation recommends putting A, B and C in a single module.
  • But splitting into multiple files demonstrates more clearly how the system works.
• gsup1a.erl, gsup1b.erl, gsup1c.erl: Modules SV-A, SV-B and SV-C to supervise the GS-daemon.
  • Call chain: Erlang shell <==> SV-A <==> SV-module <--> SV-daemon <==> SV-B <==> SV-C.
    • Erlang shell: erl
    • Module SV-A: gsup1a.erl
    • SV-module: supervisor.erl
    • SV-daemon: proc_lib.erl (the supervisor gen_server process)
    • Module SV-B: gsup1b.erl (the supervisor's "callback module")
    • Module SV-C: gsup1c.erl (common functions for SV-A and SV-B)

My experiment to learn the wx_object framework. (Similar to gen_server.)

• mobsim4a.erl, mobsim4b.erl, mobsim4c.erl, mobsim4d.erl:
  • Ported mobsim3.erl to use the wx_object behaviour module.

For further details, download and view the README.html file.