user: implement mlibc as the libc, finally.

It's finally done..

Signed-off-by: kaguya <vpshinomiya@protonmail.com>

user/include/mlibc/options/linux/generic/sys-timerfd.cpp

@@ -0,0 +1,37 @@
+
+#include <errno.h>
+#include <sys/timerfd.h>
+
+#include <bits/ensure.h>
+#include <mlibc/debug.hpp>
+#include <mlibc/linux-sysdeps.hpp>
+
+int timerfd_create(int clockid, int flags) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_timerfd_create, -1);
+	int fd;
+	if(int e = mlibc::sys_timerfd_create(clockid, flags, &fd); e) {
+		errno = e;
+		return -1;
+	}
+	return fd;
+}
+
+int timerfd_settime(int fd, int flags, const struct itimerspec *value,
+		struct itimerspec *oldvalue) {
+	MLIBC_CHECK_OR_ENOSYS(mlibc::sys_timerfd_settime, -1);
+	if(int e = mlibc::sys_timerfd_settime(fd, flags, value, oldvalue); e) {
+		errno = e;
+		return -1;
+	}
+	return 0;
+}
+
+int timerfd_gettime(int fd, struct itimerspec *its) {
+	auto sysdep = MLIBC_CHECK_OR_ENOSYS(mlibc::sys_timerfd_gettime, -1);
+	if(int e = sysdep(fd, its); e) {
+		errno = e;
+		return -1;
+	}
+	return 0;
+}
+