From d9498988903da18a822d8d019e3469bec8dce994 Mon Sep 17 00:00:00 2001
From: Vitaly Baranov <vitbar@yandex-team.ru>
Date: Sat, 14 Nov 2020 07:04:03 +0300
Subject: [PATCH] glibc-compatibility: Add eventfd(), eventfd_read(),
 eventfd_write() from musl 1.2.1.

---
 base/glibc-compatibility/musl/eventfd.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 base/glibc-compatibility/musl/eventfd.c

diff --git a/base/glibc-compatibility/musl/eventfd.c b/base/glibc-compatibility/musl/eventfd.c
new file mode 100644
index 00000000000..68e489c8364
--- /dev/null
+++ b/base/glibc-compatibility/musl/eventfd.c
@@ -0,0 +1,23 @@
+#include <sys/eventfd.h>
+#include <unistd.h>
+#include <errno.h>
+#include "syscall.h"
+
+int eventfd(unsigned int count, int flags)
+{
+	int r = __syscall(SYS_eventfd2, count, flags);
+#ifdef SYS_eventfd
+	if (r==-ENOSYS && !flags) r = __syscall(SYS_eventfd, count);
+#endif
+	return __syscall_ret(r);
+}
+
+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;
+}