1 files changed, 62 insertions, 0 deletions
diff --git a/erts/include/internal/win/ethr_event.h b/erts/include/internal/win/ethr_event.h
new file mode 100644
index 0000000000..af57c20f91
--- /dev/null
+++ b/erts/include/internal/win/ethr_event.h
@@ -0,0 +1,62 @@
+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 2009-2010. All Rights Reserved.
+ *
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * %CopyrightEnd%
+ */
+
+/*
+ * Author: Rickard Green
+ */
+
+#define ETHR_EVENT_OFF_WAITER__		((LONG) -1)
+#define ETHR_EVENT_OFF__		((LONG) 1)
+#define ETHR_EVENT_ON__ 		((LONG) 0)
+
+typedef struct {
+    volatile LONG state;
+    HANDLE handle;
+} ethr_event;
+
+#if defined(ETHR_TRY_INLINE_FUNCS) || defined(ETHR_EVENT_IMPL__)
+
+static ETHR_INLINE void
+ETHR_INLINE_FUNC_NAME_(ethr_event_set)(ethr_event *e)
+{
+    /* InterlockedExchange() imply a full memory barrier which is important */
+    LONG state = InterlockedExchange(&e->state, ETHR_EVENT_ON__);
+    if (state == ETHR_EVENT_OFF_WAITER__) {
+	if (!SetEvent(e->handle))
+	    ETHR_FATAL_ERROR__(ethr_win_get_errno__());
+    }
+}
+
+static ETHR_INLINE void
+ETHR_INLINE_FUNC_NAME_(ethr_event_reset)(ethr_event *e)
+{
+    /* InterlockedExchange() imply a full memory barrier which is important */
+    InterlockedExchange(&e->state, ETHR_EVENT_OFF__);
+}
+
+#endif
+
+int ethr_event_init(ethr_event *e);
+int ethr_event_destroy(ethr_event *e);
+int ethr_event_wait(ethr_event *e);
+int ethr_event_swait(ethr_event *e, int spincount);
+#if !defined(ETHR_TRY_INLINE_FUNCS) || defined(ETHR_EVENT_IMPL__)
+void ethr_event_set(ethr_event *e);
+void ethr_event_reset(ethr_event *e);
+#endif