From 4ab66ef979faf3ad59fbf2bb8406117b657f966b Mon Sep 17 00:00:00 2001

From: Amit Shah <amit.shah@redhat.com>

Date: Mon, 21 Mar 2011 20:32:58 +0100

Subject: [PATCH] iohandlers: Add enable/disable_write_fd_handler() functions

These will be used to provide a cleaner API for the nonblocking case.

Signed-off-by: Amit Shah <amit.shah@redhat.com>

---

 iohandler.c | 35 +++++++++++++++++++++++++++++++++++

 main-loop.h |  3 +++

 2 files changed, 38 insertions(+)

diff --git a/iohandler.c b/iohandler.c

index 3c74de6..250fd0e 100644

--- a/iohandler.c

+++ b/iohandler.c

@@ -45,6 +45,41 @@ typedef struct IOHandlerRecord {

 static QLIST_HEAD(, IOHandlerRecord) io_handlers =

     QLIST_HEAD_INITIALIZER(io_handlers);

+static IOHandlerRecord *find_iohandler(int fd)

+{

+    IOHandlerRecord *ioh;

+

+    QLIST_FOREACH(ioh, &io_handlers, next) {

+        if (ioh->fd == fd) {

+            return ioh;

+        }

+    }

+    return NULL;

+}

+

+void enable_write_fd_handler(int fd, IOHandler *fd_write)

+{

+    IOHandlerRecord *ioh;

+

+    ioh = find_iohandler(fd);

+    if (!ioh) {

+        return;

+    }

+

+    ioh->fd_write = fd_write;

+}

+

+void disable_write_fd_handler(int fd)

+{

+    IOHandlerRecord *ioh;

+

+    ioh = find_iohandler(fd);

+    if (!ioh) {

+        return;

+    }

+

+    ioh->fd_write = NULL;

+}

 /* XXX: fd_read_poll should be suppressed, but an API change is

    necessary in the character devices to suppress fd_can_read(). */

diff --git a/main-loop.h b/main-loop.h

index dce1cd9..eb31273 100644

--- a/main-loop.h

+++ b/main-loop.h

@@ -175,6 +175,9 @@ typedef void IOReadHandler(void *opaque, const uint8_t *buf, int size);

 typedef int IOCanReadHandler(void *opaque);

 typedef void IOHandler(void *opaque);

+void enable_write_fd_handler(int fd, IOHandler *fd_write);

+void disable_write_fd_handler(int fd);

+

 /**

  * qemu_set_fd_handler2: Register a file descriptor with the main loop

  *

-- 

1.7.11.2