---
name: "EV::MakeMaker"
section: "3pm"
platform: "linux"
package: "perl-ev"
version: "4.37-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/EV::MakeMaker"
---

# EV::MakeMaker(3pm)

MakeMaker glue for the C-level EV API

## NAME

EV::MakeMaker - MakeMaker glue for the C-level EV API

## SYNOPSIS

This allows you to access some libevent functionality from other perl modules.

## DESCRIPTION

For optimal performance, hook into EV at the C-level.  You'll need to make changes to your `"Makefile.PL"`, load `"EV"` in your `"pm"` file and add code to your `"xs"` / `"c"` file(s).

## HOW TO

### Makefile.PL

```
  use EV::MakeMaker qw(ev_args);
  # ... set up %args ...
  WriteMakefile (ev_args (%args));
```

### extension.pm

```
  use EV (); # imports optional
```

### extension.xs

```
  #include "EVAPI.h"
  [...]
  BOOT:
    I_EV_API (HvNAME (GvSTASH (CvGV (cv))));
```

## API

See the EVAPI.h \<http://cvs.schmorp.de/EV/EV/EVAPI.h\> header, which you should include instead of *ev.h*.

In short, all the functions and macros from *ev.h* should work, except that the trailing underscore macros (`"EV_A_"`, `"EV_DEFAULT_"`) are not available (except `"EV_P_"` :).

Multiplicity is enabled.

The `"data"` member in each watcher is of type `"SV *"` and not `"void *"` (this might change at some point).

## EXAMPLE

The EV::Glib, EV::ADNS and Glib::EV modules all give nice examples on how to use this module.

Here are some *.xs* fragments taken from EV::ADNS that should get you going:

```
  #include "EVAPI.h"
  static ev_prepare pw;
  static ev_idle iw;
  static void
  idle_cb (EV_P_ ev_idle *w, int revents)
  {
    ev_idle_stop (EV_A, w);
  }
  MODULE = ...
  BOOT:
  {
    I_EV_API ("EV::ADNS");
    ev_prepare_init (&pw, prepare_cb);
    ev_init (&iw, idle_cb); ev_set_priority (&iw, EV_MINPRI);
    ev_idle_start (EV_DEFAULT, &iw);
  }
```