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| author | Peter Xu | 2018-06-20 09:32:17 +0200 |
|---|---|---|
| committer | Markus Armbruster | 2018-06-30 17:50:48 +0200 |
| commit | d88610111b40bca19925ece0fa81710d425725a8 (patch) | |
| tree | f61862148cee1c48416d2784436d7c0ccca6780b /include/chardev/char.h | |
| parent | Merge remote-tracking branch 'remotes/stefanha/tags/tracing-pull-request' int... (diff) | |
| download | qemu-d88610111b40bca19925ece0fa81710d425725a8.tar.gz qemu-d88610111b40bca19925ece0fa81710d425725a8.tar.xz qemu-d88610111b40bca19925ece0fa81710d425725a8.zip | |
chardev: comment details for CLOSED event
It was unclear before on what does the CLOSED event mean. Meanwhile we
add a TODO to fix up the CLOSED event in the future when the in/out
ports are different for a chardev.
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: "Marc-André Lureau" <marcandre.lureau@redhat.com>
CC: Stefan Hajnoczi <stefanha@redhat.com>
CC: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20180620073223.31964-2-peterx@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Diffstat (limited to 'include/chardev/char.h')
| -rw-r--r-- | include/chardev/char.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/include/chardev/char.h b/include/chardev/char.h index 04de45795e..6f0576e214 100644 --- a/include/chardev/char.h +++ b/include/chardev/char.h @@ -22,7 +22,16 @@ typedef enum { CHR_EVENT_OPENED, /* new connection established */ CHR_EVENT_MUX_IN, /* mux-focus was set to this terminal */ CHR_EVENT_MUX_OUT, /* mux-focus will move on */ - CHR_EVENT_CLOSED /* connection closed */ + CHR_EVENT_CLOSED /* connection closed. NOTE: currently this event + * is only bound to the read port of the chardev. + * Normally the read port and write port of a + * chardev should be the same, but it can be + * different, e.g., for fd chardevs, when the two + * fds are different. So when we received the + * CLOSED event it's still possible that the out + * port is still open. TODO: we should only send + * the CLOSED event when both ports are closed. + */ } QEMUChrEvent; #define CHR_READ_BUF_LEN 4096 |