ioport: add destructor method to IORange

Previously all callers had a containing object with a destructor that
could be used to trigger cleanup of the IORange objects (typically
just freeing the containing object), but a forthcoming memory API
change doesn't fit this pattern.  Rather than setting up a new global
table, extend the ioport system to support destructors.

Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/ioport.h b/ioport.h
index ab29c89fb3..23441cba08 100644
--- a/ioport.h
+++ b/ioport.h
@@ -36,6 +36,7 @@ typedef uint32_t pio_addr_t;
 /* These should really be in isa.h, but are here to make pc.h happy.  */
 typedef void (IOPortWriteFunc)(void *opaque, uint32_t address, uint32_t data);
 typedef uint32_t (IOPortReadFunc)(void *opaque, uint32_t address);
+typedef void (IOPortDestructor)(void *opaque);
 
 void ioport_register(IORange *iorange);
 int register_ioport_read(pio_addr_t start, int length, int size,