# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1632694338 -7200
# Node ID 5e038d939c9589285bca4eb24784eeb2f36aba4e
# Parent  0d2ae38e514204d8fcf1c1c0a570f3fc826af0b0
Added the notification interface to directory resources.

diff -r 0d2ae38e5142 -r 5e038d939c95 libfsserver/include/fsserver/directory_resource.h
--- a/libfsserver/include/fsserver/directory_resource.h	Sun Sep 26 23:54:05 2021 +0200
+++ b/libfsserver/include/fsserver/directory_resource.h	Mon Sep 27 00:12:18 2021 +0200
@@ -28,8 +28,7 @@
 
 
 
-/* Support for providing access to directories.
-   NOTE: Notification methods to be added when DirectoryObject is extended. */
+/* Support for providing access to directories. */
 
 class DirectoryResource : public Resource, public DirectoryObject
 {
@@ -37,6 +36,10 @@
     FileRegistry *_registry;
     DirectoryProvider *_provider;
 
+    /* Notification endpoint for event subscription. */
+
+    unsigned int _endpoint;
+
 public:
     fileid_t fileid;
 
@@ -60,6 +63,12 @@
 
     virtual long opendir(offset_t *size, l4_cap_idx_t *cap,
                          object_flags_t *object_flags);
+
+    /* Notification methods. */
+
+    virtual long subscribe(l4_cap_idx_t endpoint, notify_flags_t flags);
+
+    virtual long unsubscribe(l4_cap_idx_t endpoint);
 };
 
 // vim: tabstop=4 expandtab shiftwidth=4
diff -r 0d2ae38e5142 -r 5e038d939c95 libfsserver/lib/Makefile
--- a/libfsserver/lib/Makefile	Sun Sep 26 23:54:05 2021 +0200
+++ b/libfsserver/lib/Makefile	Mon Sep 27 00:12:18 2021 +0200
@@ -16,7 +16,7 @@
 # Compound interfaces.
 
 directory_object_NAME			= DirectoryObject
-directory_object_INTERFACES		= directory # notification
+directory_object_INTERFACES		= directory notification
 
 filesystem_object_NAME			= FilesystemObject
 filesystem_object_INTERFACES		= filesystem filesystem_factory
diff -r 0d2ae38e5142 -r 5e038d939c95 libfsserver/lib/directories/directory_resource.cc
--- a/libfsserver/lib/directories/directory_resource.cc	Sun Sep 26 23:54:05 2021 +0200
+++ b/libfsserver/lib/directories/directory_resource.cc	Mon Sep 27 00:12:18 2021 +0200
@@ -126,4 +126,22 @@
     return IPC_MESSAGE_SENT;
 }
 
+
+
+/* NOTE: These methods are effectively the same as the FilePager methods. */
+
+/* Subscribe to notifications. */
+
+long DirectoryResource::subscribe(l4_cap_idx_t endpoint, notify_flags_t flags)
+{
+    _endpoint = _provider->subscribe(endpoint, flags);
+    return L4_EOK;
+}
+
+long DirectoryResource::unsubscribe(l4_cap_idx_t endpoint)
+{
+    _provider->unsubscribe(_endpoint, endpoint);
+    return L4_EOK;
+}
+
 // vim: tabstop=4 expandtab shiftwidth=4