1 files changed, 51 insertions, 0 deletions
diff --git a/lib/libc/gen/eventfd.c b/lib/libc/gen/eventfd.c
new file mode 100644
index 000000000000..44a33915c2fb
--- /dev/null
+++ b/lib/libc/gen/eventfd.c
@@ -0,0 +1,51 @@
+/*-
+ * SPDX-License-Identifier: MIT
+ *
+ * Copyright (c) 2005-2020 Rich Felker, et al.
+ * Copyright (c) 2020 Val Packett
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "namespace.h"
+#include <sys/eventfd.h>
+#include <sys/specialfd.h>
+#include <unistd.h>
+#include "un-namespace.h"
+#include "libc_private.h"
+
+int eventfd(unsigned int initval, int flags)
+{
+	struct specialfd_eventfd args;
+
+	args.initval = initval;
+	args.flags = flags;
+	return (__sys___specialfd(SPECIALFD_EVENTFD, &args, sizeof(args)));
+}
+
+int eventfd_read(int fd, eventfd_t *value)
+{
+	return (sizeof(*value) == _read(fd, value, sizeof(*value)) ? 0 : -1);
+}
+
+int eventfd_write(int fd, eventfd_t value)
+{
+	return (sizeof(value) == _write(fd, &value, sizeof(value)) ? 0 : -1);
+}