fdtrack: add wrapper for eventfd.
Bug: https://issuetracker.google.com/154450436
Test: bionic-unit-tests
Change-Id: I59013f0c4da0debbcc50269c64ae9db0cdc4eaa0
diff --git a/libc/bionic/eventfd.cpp b/libc/bionic/eventfd.cpp
new file mode 100644
index 0000000..f13c6a3
--- /dev/null
+++ b/libc/bionic/eventfd.cpp
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/eventfd.h>
+#include <unistd.h>
+
+#include "private/bionic_fdtrack.h"
+
+extern "C" int __eventfd(unsigned int initval, int flags);
+
+int eventfd(unsigned int initval, int flags) {
+ return FDTRACK_CREATE(__eventfd(initval, flags));
+}
+
+int eventfd_read(int fd, eventfd_t* value) {
+ return (read(fd, value, sizeof(*value)) == sizeof(*value)) ? 0 : -1;
+}
+
+int eventfd_write(int fd, eventfd_t value) {
+ return (write(fd, &value, sizeof(value)) == sizeof(value)) ? 0 : -1;
+}