Auto merge of #2253 - devnexen:timer_api_linux, r=JohnTitor

linux add timer api

Author: bors

libc-test/semver/linux.txt

@@ -3043,6 +3043,11 @@ telldir
 timerfd_create
 timerfd_gettime
 timerfd_settime
+timer_create
+timer_delete
+timer_getoverrun
+timer_gettime
+timer_settime
 tmpfile64
 truncate
 truncate64

src/unix/linux_like/linux/mod.rs

@@ -3361,7 +3361,7 @@ extern "C" {
     pub fn lremovexattr(path: *const c_char, name: *const c_char) -> ::c_int;
     pub fn fremovexattr(filedes: ::c_int, name: *const c_char) -> ::c_int;
     pub fn signalfd(fd: ::c_int, mask: *const ::sigset_t, flags: ::c_int) -> ::c_int;
-    pub fn timerfd_create(clockid: ::c_int, flags: ::c_int) -> ::c_int;
+    pub fn timerfd_create(clockid: ::clockid_t, 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,
@@ -3824,6 +3824,24 @@ extern "C" {
     pub fn gettid() -> ::pid_t;
 }
 
+#[link(name = "rt")]
+extern "C" {
+    pub fn timer_create(
+        clockid: ::clockid_t,
+        sevp: *mut ::sigevent,
+        timerid: *mut ::timer_t,
+    ) -> ::c_int;
+    pub fn timer_delete(timerid: ::timer_t) -> ::c_int;
+    pub fn timer_getoverrun(timerid: ::timer_t) -> ::c_int;
+    pub fn timer_gettime(timerid: ::timer_t, curr_value: *mut ::itimerspec) -> ::c_int;
+    pub fn timer_settime(
+        timerid: ::timer_t,
+        flags: ::c_int,
+        new_value: *const ::itimerspec,
+        old_value: *mut ::itimerspec,
+    ) -> ::c_int;
+}
+
 cfg_if! {
     if #[cfg(target_env = "uclibc")] {
         mod uclibc;

src/unix/linux_like/mod.rs

@@ -2,6 +2,7 @@ pub type sa_family_t = u16;
 pub type speed_t = ::c_uint;
 pub type tcflag_t = ::c_uint;
 pub type clockid_t = ::c_int;
+pub type timer_t = *mut ::c_void;
 pub type key_t = ::c_int;
 pub type id_t = ::c_uint;