From de00ad47ad4cf93c472394c8fb309ddee8638a49 Mon Sep 17 00:00:00 2001
From: Georg Hopp <georg@steffers.org>
Date: Wed, 15 Feb 2012 06:19:52 +0100
Subject: [PATCH] add subject/observer interface

---
 include/interface/observer.h | 17 +++++++++++++++++
 include/interface/subject.h  | 23 +++++++++++++++++++++++
 src/Makefile.am              |  3 ++-
 src/interface/observer.c     | 15 +++++++++++++++
 src/interface/subject.c      | 27 +++++++++++++++++++++++++++
 5 files changed, 84 insertions(+), 1 deletion(-)
 create mode 100644 include/interface/observer.h
 create mode 100644 include/interface/subject.h
 create mode 100644 src/interface/observer.c
 create mode 100644 src/interface/subject.c

diff --git a/include/interface/observer.h b/include/interface/observer.h
new file mode 100644
index 0000000..edd5ea6
--- /dev/null
+++ b/include/interface/observer.h
@@ -0,0 +1,17 @@
+#ifndef __OBSERVER_H__
+#define __OBSERVER_H__
+
+typedef void (* fptr_observerNotify)(void *, void*);
+
+extern const struct interface i_Observer;
+
+struct i_Observer {
+	const struct interface * const _;
+	fptr_observerNotify      notify;
+};
+
+extern void observerNotify(void *, void *);
+
+#endif // __OBSERVER_H__
+
+// vim: set ts=4 sw=4:
diff --git a/include/interface/subject.h b/include/interface/subject.h
new file mode 100644
index 0000000..f3d4853
--- /dev/null
+++ b/include/interface/subject.h
@@ -0,0 +1,23 @@
+#ifndef __SUBJECT_H__
+#define __SUBJECT_H__
+
+typedef void (* fptr_subjectAttach)(void *, void *);
+typedef void (* fptr_subjectDetach)(void *, void *);
+typedef void (* fptr_subjectNotify)(void *);
+
+extern const struct interface i_Subject;
+
+struct i_Subject {
+	const struct interface * const _;
+	fptr_subjectAttach       attach;
+	fptr_subjectDetach       detach;
+	fptr_subjectNotify       notify;
+};
+
+extern void subjectAttach(void *, void *);
+extern void subjectDetach(void *, void *);
+extern void subjectNotify(void *);
+
+#endif // __SUBJECT_H__
+
+// vim: set ts=4 sw=4:
diff --git a/src/Makefile.am b/src/Makefile.am
index 8327aeb..4e6c690 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -2,7 +2,8 @@ ACLOCAL_AMFLAGS = -I m4
 AUTOMAKE_OPTIONS = subdir-objects
 
 IFACE  = interface/class.c interface/stream_reader.c interface/logger.c \
-	 interface/stream_writer.c interface/http_intro.c
+	 interface/stream_writer.c interface/http_intro.c \
+	 interface/subject.c interface/observer.c
 CLASS  = class.c interface.c
 SOCKET = socket.c socket/accept.c socket/connect.c socket/listen.c
 SERVER = server.c server/run.c server/close_conn.c
diff --git a/src/interface/observer.c b/src/interface/observer.c
new file mode 100644
index 0000000..653fe1e
--- /dev/null
+++ b/src/interface/observer.c
@@ -0,0 +1,15 @@
+#include "class.h"
+#include "interface/observer.h"
+
+const struct interface i_Observer = {
+	"observer",
+	1
+};
+
+void
+observerNotify(void * observer, void * subject)
+{
+	CALL(observer, Observer, notify, subject);
+}
+
+// vim: set ts=4 sw=4:
diff --git a/src/interface/subject.c b/src/interface/subject.c
new file mode 100644
index 0000000..f0979f6
--- /dev/null
+++ b/src/interface/subject.c
@@ -0,0 +1,27 @@
+#include "class.h"
+#include "interface/subject.h"
+
+const struct interface i_Subject = {
+	"subject",
+	3
+};
+
+void
+subjectAttach(void * subject, void * observer)
+{
+	CALL(subject, Subject, attach, observer);
+}
+
+void
+subjectDetach(void * subject, void * observer)
+{
+	CALL(subject, Subject, detach, observer);
+}
+
+void
+subjectNotify(void * subject)
+{
+	CALL(subject, Subject, notify);
+}
+
+// vim: set ts=4 sw=4: