Added more platforms

Author: xonatius

src/time.rs

@@ -21,7 +21,13 @@ impl ClockId {
     }
 
     /// Returns `ClockId` of a `pid` CPU-time clock
-    #[cfg(target_os = "linux")]
+    #[cfg(any(
+        target_os = "freebsd",
+        target_os = "dragonfly",
+        target_os = "linux",
+        target_os = "android",
+        target_os = "emscripten",
+    ))]
     pub fn pid_cpu_clock_id(pid: Pid) -> Result<Self> {
         clock_getcpuclockid(pid)
     }
@@ -229,7 +235,13 @@ pub fn clock_settime(clock_id: ClockId, timespec: TimeSpec) -> Result<()> {
 
 /// Get the clock id of the specified process id, (see
 /// [clock_getcpuclockid(3)](https://www.man7.org/linux/man-pages/man3/clock_getcpuclockid.3.html)).
-#[cfg(target_os = "linux")]
+#[cfg(any(
+    target_os = "freebsd",
+    target_os = "dragonfly",
+    target_os = "linux",
+    target_os = "android",
+    target_os = "emscripten",
+))]
 pub fn clock_getcpuclockid(pid: Pid) -> Result<ClockId> {
     let mut clk_id: MaybeUninit<libc::clockid_t> = MaybeUninit::uninit();
     let ret = unsafe { libc::clock_getcpuclockid(pid.into(), clk_id.as_mut_ptr()) };

test/test_time.rs

@@ -1,4 +1,10 @@
-#[cfg(target_os = "linux")]
+#[cfg(any(
+    target_os = "freebsd",
+    target_os = "dragonfly",
+    target_os = "linux",
+    target_os = "android",
+    target_os = "emscripten",
+))]
 use nix::time::clock_getcpuclockid;
 use nix::time::{clock_getres, clock_gettime, ClockId};
 
@@ -12,7 +18,13 @@ pub fn test_clock_gettime() {
     assert!(clock_gettime(ClockId::CLOCK_REALTIME).is_ok());
 }
 
-#[cfg(target_os = "linux")]
+#[cfg(any(
+    target_os = "freebsd",
+    target_os = "dragonfly",
+    target_os = "linux",
+    target_os = "android",
+    target_os = "emscripten",
+))]
 #[test]
 pub fn test_clock_getcpuclockid() {
     let clock_id = clock_getcpuclockid(nix::unistd::Pid::this()).unwrap();
@@ -29,7 +41,13 @@ pub fn test_clock_id_now() {
     assert!(ClockId::CLOCK_REALTIME.now().is_ok());
 }
 
-#[cfg(target_os = "linux")]
+#[cfg(any(
+    target_os = "freebsd",
+    target_os = "dragonfly",
+    target_os = "linux",
+    target_os = "android",
+    target_os = "emscripten",
+))]
 #[test]
 pub fn test_clock_id_pid_cpu_clock_id() {
     assert!(ClockId::pid_cpu_clock_id(nix::unistd::Pid::this())