From 8cb28826ffaccd2f9f9f0c77c9cfdf61d1100069 Mon Sep 17 00:00:00 2001
From: Sebastian Huber <sebastian.huber@embedded-brains.de>
Date: Thu, 31 Oct 2013 15:00:20 +0100
Subject: Filesystem: Add kernel event filter handler

This handler is necessary to implement the KQUEUE(2) system calls.

Add <sys/event.h> from FreeBSD 8.4.
---
 cpukit/libcsupport/include/rtems/libio.h | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

(limited to 'cpukit/libcsupport/include/rtems/libio.h')

diff --git a/cpukit/libcsupport/include/rtems/libio.h b/cpukit/libcsupport/include/rtems/libio.h
index a6420620c3..21d57ebddf 100644
--- a/cpukit/libcsupport/include/rtems/libio.h
+++ b/cpukit/libcsupport/include/rtems/libio.h
@@ -41,6 +41,8 @@
 extern "C" {
 #endif
 
+struct knote;
+
 /**
  * @defgroup LibIOFSOps File System Operations
  *
@@ -957,6 +959,22 @@ typedef int (*rtems_filesystem_poll_t)(
   int events
 );
 
+/**
+ * @brief Kernel event filter support.
+ *
+ * @param[in, out] iop The IO pointer.
+ * @param[in] kn The kernel event note.
+ *
+ * @retval 0 Successful operation.
+ * @retval error An error occurred.  This is usually EINVAL.
+ *
+ * @see rtems_filesystem_default_kqfilter().
+ */
+typedef int (*rtems_filesystem_kqfilter_t)(
+  rtems_libio_t *iop,
+  struct knote *kn
+);
+
 /**
  * @brief File system node operations table.
  */
@@ -973,6 +991,7 @@ struct _rtems_filesystem_file_handlers_r {
   rtems_filesystem_fdatasync_t fdatasync_h;
   rtems_filesystem_fcntl_t fcntl_h;
   rtems_filesystem_poll_t poll_h;
+  rtems_filesystem_kqfilter_t kqfilter_h;
 };
 
 /**
@@ -1158,6 +1177,18 @@ int rtems_filesystem_default_poll(
   int events
 );
 
+/**
+ * @brief Default kernel event filter handler.
+ *
+ * @retval EINVAL Always.
+ *
+ * @see rtems_filesystem_kqfilter_t.
+ */
+int rtems_filesystem_default_kqfilter(
+  rtems_libio_t *iop,
+  struct knote *kn
+);
+
 /** @} */
 
 /**
-- 
cgit v1.2.3