X-Git-Url: https://git.dogcows.com/gitweb?a=blobdiff_plain;f=slides.html;h=8904bd24addaf2a9151822c1795c18636db47498;hb=e9a895bf42ef9b706aba2d2770ae61dad28ea9a4;hp=6d589b4552d0e1edcb157ecabcd8f1e42d7d6b5f;hpb=fa698f7b8f498a04b0394f5cadc2cadf0a6fb21a;p=chaz%2Ftalk-event-driven-programming-in-perl

diff --git a/slides.html b/slides.html
index 6d589b4..8904bd2 100644
--- a/slides.html
+++ b/slides.html
@@ -70,6 +70,16 @@ At it's core, event-driven programming is this simple.
 
 But there are some complications and things to knows, which is why this talk exists.
 
+---
+class: center, middle
+
+![Help desk](img/helpdesk.jpg)
+
+.small[
+Image by Soniachat8.
+This image is licensed under the [Creative Commons Attribution-Share Alike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/deed.en) license.
+]
+
 ---
 name:  graph-eventloop
 class: center, middle
@@ -378,9 +388,13 @@ class: syscalls
 - [`clock_gettime`](http://man.he.net/man2/clock_gettime) - What time is it now?
 
 ---
+class: center, middle
 
 ## Reactor pattern
 
+---
+## Reactor pattern
+
 .big[
 - Queues events asynchronously.
 - Demultiplexes and dispatches synchronously.
@@ -395,9 +409,26 @@ class: center, middle
 ![Reactor](img/reactor.svg)
 
 ---
-class: ex-basicreactor
+class: ex-basicreactor1
+
+## Using a reactor
+
+```perl
+my $reactor = My::Reactor->new;
+
+# Set up event handlers
+$reactor->slurp_file($filepath, \&handle_slurp_event);
+$reactor->timer(5, \&handle_timer_event);
+$reactor->listen($socket, \&handle_new_connect_event);
+...
+
+$reactor->run_loop;
+```
+
+---
+class: ex-basicreactor2
 
-## The basic reactor
+## The basic reactor implementation
 
 ```perl
 our $timers     = [...];
@@ -414,9 +445,9 @@ while (1) {
 ```
 
 ---
-class: ex-basicreactor
+class: ex-basicreactor2
 
-## The basic reactor
+## The basic reactor implementation
 
 ```perl
 our $timers     = [...];
@@ -445,6 +476,10 @@ while (1) {
 - [`Mojo::Reactor::Poll`](https://metacpan.org/source/Mojo::Reactor::Poll)
 ]
 
+???
+These links, which will be available to you with the slides, link directly to the source code of these modules on
+metacpan so you can take a look at how they work.
+
 ---
 name:  not-all-roses
 class: center, middle
@@ -498,6 +533,39 @@ $promise->on_fail(sub { ... });
 ---
 class: center, middle
 
+## `SIGPIPE`
+
+---
+class: sigpipe
+## `SIGPIPE`
+
+- Sent to your program when it writes to a pipe that was closed.
+
+--
+- Default signal handler terminates the program.
+
+---
+class: ex-sigpipe
+
+## Solution: Ignore `SIGPIPE`
+
+```perl
+$SIG{PIPE} = 'IGNORE';
+```
+
+???
+Some event loops do this for you.
+
+--
+.big[
+Look for `EPIPE` from syscalls (like [`write`](http://man.he.net/man2/write)) instead.
+
+(You *are* checking return codes from your system calls... right?)
+]
+
+---
+class: center, middle
+
 ## Use [`Future::AsyncAwait`](https://metacpan.org/pod/Future::AsyncAwait).
 
 ???