Revision 2292b339
b/Makefile.target | ||
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165 | 165 |
# virtio has to be here due to weird dependency between PCI and virtio-net. |
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# need to fix this properly |
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obj-y += virtio-blk.o virtio-balloon.o virtio-net.o virtio-pci.o virtio-serial-bus.o |
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obj-y += event_notifier.o |
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168 | 169 |
obj-y += rwhandler.o |
169 | 170 |
obj-$(CONFIG_KVM) += kvm.o kvm-all.o |
170 | 171 |
LIBS+=-lz |
b/hw/event_notifier.c | ||
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/* |
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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. See |
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* the COPYING file in the top-level directory. |
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*/ |
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#include "hw.h" |
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#include "event_notifier.h" |
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#ifdef CONFIG_EVENTFD |
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#include <sys/eventfd.h> |
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#endif |
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int event_notifier_init(EventNotifier *e, int active) |
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{ |
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#ifdef CONFIG_EVENTFD |
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int fd = eventfd(!!active, EFD_NONBLOCK | EFD_CLOEXEC); |
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if (fd < 0) |
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return -errno; |
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e->fd = fd; |
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return 0; |
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#else |
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return -ENOSYS; |
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#endif |
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} |
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void event_notifier_cleanup(EventNotifier *e) |
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{ |
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close(e->fd); |
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} |
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int event_notifier_get_fd(EventNotifier *e) |
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{ |
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return e->fd; |
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} |
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int event_notifier_test_and_clear(EventNotifier *e) |
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{ |
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uint64_t value; |
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int r = read(e->fd, &value, sizeof(value)); |
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return r == sizeof(value); |
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} |
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int event_notifier_test(EventNotifier *e) |
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{ |
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uint64_t value; |
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int r = read(e->fd, &value, sizeof(value)); |
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if (r == sizeof(value)) { |
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/* restore previous value. */ |
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int s = write(e->fd, &value, sizeof(value)); |
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/* never blocks because we use EFD_SEMAPHORE. |
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* If we didn't we'd get EAGAIN on overflow |
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* and we'd have to write code to ignore it. */ |
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assert(s == sizeof(value)); |
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} |
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return r == sizeof(value); |
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} |
b/hw/event_notifier.h | ||
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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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struct EventNotifier { |
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int fd; |
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}; |
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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_get_fd(EventNotifier *); |
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int event_notifier_test_and_clear(EventNotifier *); |
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int event_notifier_test(EventNotifier *); |
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#endif |
b/qemu-common.h | ||
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228 | 228 |
typedef struct I2SCodec I2SCodec; |
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typedef struct DeviceState DeviceState; |
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typedef struct SSIBus SSIBus; |
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typedef struct EventNotifier EventNotifier; |
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typedef uint64_t pcibus_t; |
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