timerfd api for freebsd 14.

close #3339

Author: devnexen

libc-test/build.rs

@@ -2343,6 +2343,9 @@ fn test_freebsd(target: &str) {
             // Added in FreeBSD 13.2
             "AT_USRSTACKBASE" | "AT_USRSTACKLIM" if Some(13) > freebsd_ver => true,
 
+            // Added in FreeBSD 14
+            "TFD_CLOEXEC" | "TFD_NONBLOCK" if Some(14) > freebsd_ver => true,
+
             _ => false,
         }
     });
@@ -2441,6 +2444,11 @@ fn test_freebsd(target: &str) {
                 true
             }
 
+            // Those are introduced in FreeBSD 14.
+            "timerfd_create" | "timerfd_gettime" | "timerfd_settime" if Some(14) > freebsd_ver => {
+                true
+            }
+
             _ => false,
         }
     });

src/unix/bsd/freebsdlike/freebsd/mod.rs

@@ -4693,6 +4693,11 @@ pub const RB_POWERCYCLE: ::c_int = 0x400000;
 pub const RB_PROBE: ::c_int = 0x10000000;
 pub const RB_MULTIPLE: ::c_int = 0x20000000;
 
+// sys/timerfd.h
+
+pub const TFD_NONBLOCK: ::c_int = ::O_NONBLOCK;
+pub const TFD_CLOEXEC: ::c_int = O_CLOEXEC;
+
 cfg_if! {
     if #[cfg(libc_const_extern_fn)] {
         pub const fn MAP_ALIGNED(a: ::c_int) -> ::c_int {
@@ -5406,6 +5411,15 @@ extern "C" {
         infotype: *mut ::c_uint,
         flags: *mut ::c_int,
     ) -> ::ssize_t;
+
+    pub fn timerfd_create(clockid: ::c_int, flags: ::c_int) -> ::c_int;
+    pub fn timerfd_gettime(fd: ::c_int, curr_value: *mut itimerspec) -> ::c_int;
+    pub fn timerfd_settime(
+        fd: ::c_int,
+        flags: ::c_int,
+        new_value: *const itimerspec,
+        old_value: *mut itimerspec,
+    ) -> ::c_int;
 }
 
 #[link(name = "memstat")]