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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>
47 lines
994 B
C
47 lines
994 B
C
/*
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* event notifier support
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*
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* Copyright Red Hat, Inc. 2010
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*
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* Authors:
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* Michael S. Tsirkin <mst@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef QEMU_EVENT_NOTIFIER_H
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#define QEMU_EVENT_NOTIFIER_H
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#include "qemu-common.h"
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#ifdef _WIN32
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#include <windows.h>
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#endif
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struct EventNotifier {
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#ifdef _WIN32
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HANDLE event;
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#else
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int rfd;
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int wfd;
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#endif
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};
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typedef void EventNotifierHandler(EventNotifier *);
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int event_notifier_init(EventNotifier *, int active);
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void event_notifier_cleanup(EventNotifier *);
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int event_notifier_set(EventNotifier *);
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int event_notifier_test_and_clear(EventNotifier *);
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int event_notifier_set_handler(EventNotifier *, EventNotifierHandler *);
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#ifdef CONFIG_POSIX
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void event_notifier_init_fd(EventNotifier *, int fd);
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int event_notifier_get_fd(EventNotifier *);
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#else
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HANDLE event_notifier_get_handle(EventNotifier *);
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#endif
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#endif
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