From 0dcf117910d5766cf09f541bc03efb5845234c62 Mon Sep 17 00:00:00 2001
From: Jason Volk <jason@zemos.net>
Date: Fri, 23 Mar 2018 18:00:21 -0700
Subject: [PATCH] ircd::mods: Provide a reference to the module's own handle
 inside the module.

---
 include/ircd/mapi.h | 21 +++++++++++++++++++++
 ircd/mods.cc        |  3 +++
 2 files changed, 24 insertions(+)

diff --git a/include/ircd/mapi.h b/include/ircd/mapi.h
index ad25cd69a..65fb94d58 100644
--- a/include/ircd/mapi.h
+++ b/include/ircd/mapi.h
@@ -44,11 +44,16 @@ struct ircd::mapi::header
 	init_function init;                          // Executed after dlopen()
 	fini_function fini;                          // Executed before dlclose()
 	metadata meta;                               // Various key-value metadata
+	mods::mod *self;                             // Module instance once loaded
 
 	// get and set metadata
 	auto &operator[](const std::string &s) const;
 	auto &operator[](const std::string &s);
 
+	// become self
+	operator const mods::mod &() const;
+	operator mods::mod &();
+
 	header(const char *const &desc = "<no description>",
 	       init_function = {},
 	       fini_function = {});
@@ -69,6 +74,7 @@ ircd::mapi::header::header(const char *const &desc,
 {
 	{ "description", desc }
 }
+,self{nullptr}
 {
 }
 
@@ -79,6 +85,21 @@ noexcept
 	static_destruction = true;
 }
 
+inline ircd::mapi::header::operator
+mods::mod &()
+{
+	assert(self);
+	return *self;
+}
+
+inline ircd::mapi::header::operator
+const mods::mod &()
+const
+{
+	assert(self);
+	return *self;
+}
+
 inline auto &
 ircd::mapi::header::operator[](const std::string &key)
 {
diff --git a/ircd/mods.cc b/ircd/mods.cc
index 8f7594bc7..b0777d929 100644
--- a/ircd/mods.cc
+++ b/ircd/mods.cc
@@ -106,6 +106,9 @@ try
 		            header->magic,
 		            mapi::MAGIC);
 
+	// Tell the module where to find us.
+	header->self = this;
+
 	// Set some basic metadata
 	auto &meta(header->meta);
 	meta["name"] = name();