[Qemu-devel] [PATCH 01/25] event_notifier: add Win32 implementation

[Paolo Bonzini <pbonzini@redhat.com>]

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 Makefile.objs                              |  4 ++-
 event_notifier.c => event_notifier-posix.c |  0
 event_notifier.c => event_notifier-win32.c | 48 +++++++++++++-----------------
 event_notifier.h                           | 17 +++++++++--
 qemu-os-win32.h                            |  1 -
 5 file modificati, 38 inserzioni(+), 32 rimozioni(-)
 copy event_notifier.c => event_notifier-posix.c (100%)
 rename event_notifier.c => event_notifier-win32.c (49%)

diff --git a/Makefile.objs b/Makefile.objs
index 74b3542..a0a3543 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -93,7 +93,9 @@ common-obj-y += bt-host.o bt-vhci.o
 common-obj-y += dma-helpers.o
 common-obj-y += iov.o acl.o
 common-obj-$(CONFIG_POSIX) += compatfd.o
-common-obj-y += notify.o event_notifier.o
+common-obj-y += notify.o
+common-obj-$(CONFIG_POSIX) += event_notifier-posix.o
+common-obj-$(CONFIG_WIN32) += event_notifier-win32.o
 common-obj-y += qemu-timer.o qemu-timer-common.o
 common-obj-y += qtest.o
 common-obj-y += vl.o
diff --git a/event_notifier.c b/event_notifier-posix.c
similarity index 100%
copy from event_notifier.c
copy to event_notifier-posix.c
diff --git a/event_notifier.c b/event_notifier-win32.c
similarity index 49%
rename from event_notifier.c
rename to event_notifier-win32.c
index 2c207e1..c723dad 100644
--- a/event_notifier.c
+++ b/event_notifier-win32.c
@@ -12,56 +12,48 @@
 
 #include "qemu-common.h"
 #include "event_notifier.h"
-#include "qemu-char.h"
-
-#ifdef CONFIG_EVENTFD
-#include <sys/eventfd.h>
-#endif
-
-void event_notifier_init_fd(EventNotifier *e, int fd)
-{
-    e->fd = fd;
-}
+#include "main-loop.h"
 
 int event_notifier_init(EventNotifier *e, int active)
 {
-#ifdef CONFIG_EVENTFD
-    int fd = eventfd(!!active, EFD_NONBLOCK | EFD_CLOEXEC);
-    if (fd < 0)
-        return -errno;
-    e->fd = fd;
+    e->event = CreateEvent(NULL, FALSE, FALSE, NULL);
+    assert(e->event);
     return 0;
-#else
-    return -ENOSYS;
-#endif
 }
 
 void event_notifier_cleanup(EventNotifier *e)
 {
-    close(e->fd);
+    CloseHandle(e->event);
 }
 
-int event_notifier_get_fd(EventNotifier *e)
+HANDLE event_notifier_get_handle(EventNotifier *e)
 {
-    return e->fd;
+    return e->event;
 }
 
 int event_notifier_set_handler(EventNotifier *e,
                                EventNotifierHandler *handler)
 {
-    return qemu_set_fd_handler(e->fd, (IOHandler *)handler, NULL, e);
+    if (handler) {
+        return qemu_add_wait_object(e->event, (IOHandler *)handler, e);
+    } else {
+        qemu_del_wait_object(e->event, (IOHandler *)handler, e);
+        return 0;
+    }
 }
 
 int event_notifier_set(EventNotifier *e)
 {
-    uint64_t value = 1;
-    int r = write(e->fd, &value, sizeof(value));
-    return r == sizeof(value);
+    SetEvent(e->event);
+    return 0;
 }
 
 int event_notifier_test_and_clear(EventNotifier *e)
 {
-    uint64_t value;
-    int r = read(e->fd, &value, sizeof(value));
-    return r == sizeof(value);
+    int ret = WaitForSingleObject(e->event, 0);
+    if (ret == WAIT_OBJECT_0) {
+        ResetEvent(e->event);
+        return true;
+    }
+    return false;
 }
diff --git a/event_notifier.h b/event_notifier.h
index f0ec2f2..b283a49 100644
--- a/event_notifier.h
+++ b/event_notifier.h
@@ -15,18 +15,31 @@
 
 #include "qemu-common.h"
 
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
 struct EventNotifier {
+#ifdef _WIN32
+    HANDLE event;
+#else
     int fd;
+#endif
 };
 
 typedef void EventNotifierHandler(EventNotifier *);
 
-void event_notifier_init_fd(EventNotifier *, int fd);
 int event_notifier_init(EventNotifier *, int active);
 void event_notifier_cleanup(EventNotifier *);
-int event_notifier_get_fd(EventNotifier *);
 int event_notifier_set(EventNotifier *);
 int event_notifier_test_and_clear(EventNotifier *);
 int event_notifier_set_handler(EventNotifier *, EventNotifierHandler *);
 
+#ifdef CONFIG_POSIX
+void event_notifier_init_fd(EventNotifier *, int fd);
+int event_notifier_get_fd(EventNotifier *);
+#else
+HANDLE event_notifier_get_handle(EventNotifier *);
+#endif
+
 #endif
diff --git a/qemu-os-win32.h b/qemu-os-win32.h
index 8ba466d..d0e9234 100644
--- a/qemu-os-win32.h
+++ b/qemu-os-win32.h
@@ -28,7 +28,6 @@
 
 #include <windows.h>
 #include <winsock2.h>
-#include "main-loop.h"
 
 /* Workaround for older versions of MinGW. */
 #ifndef ECONNREFUSED
-- 
1.7.12.1