X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Design%20Notes%2FVFS%20-%20Select.txt;h=70e1993cd5a9bcc8c12dbf4c8c161bf025d4b9f2;hb=ec613add227a8e9a8a71f7631c8e8d09140d246a;hp=cceef5ce39eecbf267ad758b6a6c8e202c6891b6;hpb=58d2f56cd5211d93b4984e1f66a8aba5f0599942;p=tpg%2Facess2.git

diff --git a/Design Notes/VFS - Select.txt b/Design Notes/VFS - Select.txt
index cceef5ce..70e1993c 100644
--- a/Design Notes/VFS - Select.txt	
+++ b/Design Notes/VFS - Select.txt	
@@ -10,3 +10,16 @@ The VFS function select()
 - Maintains a list of processes on each node (if select has been called on that node)
 - Each process maybe has a semaphore on it (to use the semaphore code to maintain the process list)
  > Could maybe use a mutex instead
+
+
+VFS_Select(int, fd_set* read, fd_set* write, fd_set* except)
+
+read is the set of sockets that we are waiting to read from
+write         "           "           "           be able to write to
+except        "           "           "        for possible errors on
+
+
+Hence, each VFS_Node has three listener lists (or just pointers)
+- One for when data is avaliable
+- One for when space is avaliable for writing
+- One for when an error occurs (closed pipe, etc ...)