X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Kernel%2Finclude%2Fvfs.h;h=cded047e771485c7ae85962a787bffe09aa25a85;hb=a2b49f92646ef666e17172faf72a9dcc0d18942a;hp=c2f2e35b3f4b8244a8d61e709f704c69b6f3e879;hpb=18a6f0a17a50c25007a8f9b910af02bdf6fbcb78;p=tpg%2Facess2.git

diff --git a/Kernel/include/vfs.h b/Kernel/include/vfs.h
index c2f2e35b..cded047e 100644
--- a/Kernel/include/vfs.h
+++ b/Kernel/include/vfs.h
@@ -21,6 +21,11 @@
 
 #include <acess.h>
 
+/**
+ * \brief Thread list datatype for VFS_Select
+ */
+typedef struct sVFS_SelectList	tVFS_SelectList;
+
 /**
  * \name tVFS_Node Flags
  * \brief Flag values for tVFS_Node.Flags
@@ -127,7 +132,7 @@ typedef struct sVFS_Node
 	 */
 	
 	/**
-	 * \name Access controll
+	 * \name Access control
 	 * \{
 	 */
 	tUID	UID;	//!< ID of Owning User
@@ -139,6 +144,20 @@ typedef struct sVFS_Node
 	 * \}
 	 */
 	
+	/**
+	 * \name VFS_Select() fields
+	 * \{
+	 */
+	 int	DataAvaliable;
+	tVFS_SelectList	*ReadThreads;	//!< Threads waiting to read
+	 int	BufferFull;
+	tVFS_SelectList	*WriteThreads;	//!< Threads waiting to write
+	 int	ErrorOccurred;
+	tVFS_SelectList	*ErrorThreads;	//!< Threads waiting for an error
+	/**
+	 * \}
+	 */
+	
 	/**
 	 * \name Common Functions
 	 * \brief Functions that are used no matter the value of .Flags
@@ -265,12 +284,12 @@ typedef struct sVFS_Node
 typedef struct sVFS_Driver
 {
 	//! \brief Unique Identifier for this filesystem type
-	char	*Name;
+	const char	*Name;
 	//! \brief Flags applying to this driver
 	Uint	Flags;
 	
 	//! \brief Callback to mount a device
-	tVFS_Node	*(*InitDevice)(char *Device, char **Options);
+	tVFS_Node	*(*InitDevice)(const char *Device, const char **Options);
 	//! \brief Callback to unmount a device
 	void	(*Unmount)(tVFS_Node *Node);
 	//! \brief Used internally (next driver in the chain)
@@ -311,7 +330,21 @@ extern int	VFS_AddDriver(tVFS_Driver *Info);
  * \brief Get the information structure of a driver given its name
  * \param Name	Name of filesystem driver to find
  */
-extern tVFS_Driver	*VFS_GetFSByName(char *Name);
+extern tVFS_Driver	*VFS_GetFSByName(const char *Name);
+
+
+/**
+ * \brief Prepare a node for use
+ */
+extern void	VFS_InitNode(tVFS_Node *Node);
+
+/**
+ * \brief Clean up a node, ready for deletion
+ * \note This should ALWAYS be called before a node is freed, as it
+ *       cleans up VFS internal structures.
+ */
+extern void	VFS_CleanupNode(tVFS_Node *Node);
+
 /**
  * \fn tVFS_ACL *VFS_UnixToAcessACL(Uint Mode, Uint Owner, Uint Group)
  * \brief Transforms Unix Permssions into Acess ACLs
@@ -322,6 +355,32 @@ extern tVFS_Driver	*VFS_GetFSByName(char *Name);
  */
 extern tVFS_ACL	*VFS_UnixToAcessACL(Uint Mode, Uint Owner, Uint Group);
 
+/**
+ */
+enum eVFS_SelectTypes
+{
+	VFS_SELECT_READ,
+	VFS_SELECT_WRITE,
+	VFS_SELECT_ERROR
+};
+
+/**
+ * \brief Wait for an event on a node
+ * \param Node	Node to wait on
+ * \param Type	Type of wait
+ * \param Timeout	Time to wait (NULL for infinite wait)
+ * \param Name	Name to show in debug output
+ * \return Number of nodes that actioned (0 or 1)
+ */
+extern int	VFS_SelectNode(tVFS_Node *Node, enum eVFS_SelectTypes Type, tTime *Timeout, const char *Name);
+
+/**
+ * \brief Change the full flag on a node
+ */
+extern int	VFS_MarkFull(tVFS_Node *Node, BOOL IsBufferFull);
+extern int	VFS_MarkAvaliable(tVFS_Node *Node, BOOL IsDataAvaliable);
+extern int	VFS_MarkError(tVFS_Node *Node, BOOL IsErrorState);
+
 // --- Node Cache --
 /**
  * \name Node Cache