This takes the eventfd emulation code from the main loop. When the
EventNotifier is used for the main loop too, we need this compatibility
code.
Without CONFIG_EVENTFD, event_notifier_get_fd is only usable for the
"read" side of the notifier, for example to set a select() handler.
The return value of event_notifier_set changes to the cleaner 0/-errno.
No caller is actually checking the return value.
Reviewed-by: Anthony Liguori <anthony@codemonkey.ws>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Win32 event notifiers are not file descriptors, so they will not be able
to use qemu_set_fd_handler. But even if for now we only have a POSIX
version of EventNotifier, we can add a specific function that wraps
the call.
The wrapper passes the EventNotifier as the opaque value so that it will
be used with container_of.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
EventNotifier right now cannot be used as an inter-thread communication
primitive. It only works if something else (the kernel) sets the eventfd.
Add a primitive to signal an EventNotifier that another thread is waiting
on.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
All files under GPLv2 will get GPLv2+ changes starting tomorrow.
event_notifier.c and exec-obsolete.h were only ever touched by Red Hat
employees and can be relicensed now.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
