Rollup merge of rust-lang#62862 - BaoshanPang:cleanup, r=alexcrichton

code cleanup

remove all codes that are not used by vxWorks

src/libstd/sys/vxworks/alloc.rs

@@ -41,36 +41,6 @@ unsafe impl GlobalAlloc for System {
     }
 }
 
-#[cfg(any(target_os = "android",
-          target_os = "hermit",
-          target_os = "redox",
-          target_os = "solaris"))]
-#[inline]
-unsafe fn aligned_malloc(layout: &Layout) -> *mut u8 {
-    // On android we currently target API level 9 which unfortunately
-    // doesn't have the `posix_memalign` API used below. Instead we use
-    // `memalign`, but this unfortunately has the property on some systems
-    // where the memory returned cannot be deallocated by `free`!
-    //
-    // Upon closer inspection, however, this appears to work just fine with
-    // Android, so for this platform we should be fine to call `memalign`
-    // (which is present in API level 9). Some helpful references could
-    // possibly be chromium using memalign [1], attempts at documenting that
-    // memalign + free is ok [2] [3], or the current source of chromium
-    // which still uses memalign on android [4].
-    //
-    // [1]: https://codereview.chromium.org/10796020/
-    // [2]: https://code.google.com/p/android/issues/detail?id=35391
-    // [3]: https://bugs.chromium.org/p/chromium/issues/detail?id=138579
-    // [4]: https://chromium.googlesource.com/chromium/src/base/+/master/
-    //                                       /memory/aligned_memory.cc
-    libc::memalign(layout.align(), layout.size()) as *mut u8
-}
-
-#[cfg(not(any(target_os = "android",
-              target_os = "hermit",
-              target_os = "redox",
-              target_os = "solaris")))]
 #[inline]
 unsafe fn aligned_malloc(layout: &Layout) -> *mut u8 {
     let mut out = ptr::null_mut();

src/libstd/sys/vxworks/condvar.rs

@@ -62,10 +62,6 @@ impl Condvar {
     // where we configure condition variable to use monotonic clock (instead of
     // default system clock). This approach avoids all problems that result
     // from changes made to the system time.
-    #[cfg(not(any(target_os = "macos",
-                  target_os = "ios",
-                  target_os = "android",
-                  target_os = "hermit")))]
     pub unsafe fn wait_timeout(&self, mutex: &Mutex, dur: Duration) -> bool {
         use crate::mem;
 
@@ -92,78 +88,9 @@ impl Condvar {
     }
 
 
-    // This implementation is modeled after libcxx's condition_variable
-    // https://github.com/llvm-mirror/libcxx/blob/release_35/src/condition_variable.cpp#L46
-    // https://github.com/llvm-mirror/libcxx/blob/release_35/include/__mutex_base#L367
-    #[cfg(any(target_os = "macos", target_os = "ios", target_os = "android", target_os = "hermit"))]
-    pub unsafe fn wait_timeout(&self, mutex: &Mutex, mut dur: Duration) -> bool {
-        use crate::ptr;
-        use crate::time::Instant;
-
-        // 1000 years
-        let max_dur = Duration::from_secs(1000 * 365 * 86400);
-
-        if dur > max_dur {
-            // OSX implementation of `pthread_cond_timedwait` is buggy
-            // with super long durations. When duration is greater than
-            // 0x100_0000_0000_0000 seconds, `pthread_cond_timedwait`
-            // in macOS Sierra return error 316.
-            //
-            // This program demonstrates the issue:
-            // https://gist.github.com/stepancheg/198db4623a20aad2ad7cddb8fda4a63c
-            //
-            // To work around this issue, and possible bugs of other OSes, timeout
-            // is clamped to 1000 years, which is allowable per the API of `wait_timeout`
-            // because of spurious wakeups.
-
-            dur = max_dur;
-        }
-
-        // First, figure out what time it currently is, in both system and
-        // stable time.  pthread_cond_timedwait uses system time, but we want to
-        // report timeout based on stable time.
-        let mut sys_now = libc::timeval { tv_sec: 0, tv_usec: 0 };
-        let stable_now = Instant::now();
-        let r = libc::gettimeofday(&mut sys_now, ptr::null_mut());
-        debug_assert_eq!(r, 0);
-
-        let nsec = dur.subsec_nanos() as libc::c_long +
-                   (sys_now.tv_usec * 1000) as libc::c_long;
-        let extra = (nsec / 1_000_000_000) as libc::time_t;
-        let nsec = nsec % 1_000_000_000;
-        let seconds = saturating_cast_to_time_t(dur.as_secs());
-
-        let timeout = sys_now.tv_sec.checked_add(extra).and_then(|s| {
-            s.checked_add(seconds)
-        }).map(|s| {
-            libc::timespec { tv_sec: s, tv_nsec: nsec }
-        }).unwrap_or(TIMESPEC_MAX);
-
-        // And wait!
-        let r = libc::pthread_cond_timedwait(self.inner.get(), mutex::raw(mutex),
-                                            &timeout);
-        debug_assert!(r == libc::ETIMEDOUT || r == 0);
-
-        // ETIMEDOUT is not a totally reliable method of determining timeout due
-        // to clock shifts, so do the check ourselves
-        stable_now.elapsed() < dur
-    }
-
     #[inline]
-    #[cfg(not(target_os = "dragonfly"))]
     pub unsafe fn destroy(&self) {
         let r = libc::pthread_cond_destroy(self.inner.get());
         debug_assert_eq!(r, 0);
     }
-
-    #[inline]
-    #[cfg(target_os = "dragonfly")]
-    pub unsafe fn destroy(&self) {
-        let r = libc::pthread_cond_destroy(self.inner.get());
-        // On DragonFly pthread_cond_destroy() returns EINVAL if called on
-        // a condvar that was just initialized with
-        // libc::PTHREAD_COND_INITIALIZER. Once it is used or
-        // pthread_cond_init() is called, this behaviour no longer occurs.
-        debug_assert!(r == 0 || r == libc::EINVAL);
-    }
 }

src/libstd/sys/vxworks/ext/net.rs

@@ -5,16 +5,6 @@
 #[cfg(unix)]
 use libc;
 
-// FIXME(#43348): Make libc adapt #[doc(cfg(...))] so we don't need these fake definitions here?
-#[cfg(not(unix))]
-mod libc {
-    pub use libc::c_int;
-    pub type socklen_t = u32;
-    pub struct sockaddr;
-    #[derive(Clone)]
-    pub struct sockaddr_un;
-}
-
 use crate::ascii;
 use crate::ffi::OsStr;
 use crate::fmt;
@@ -29,15 +19,6 @@ use crate::sys::{self, cvt};
 use crate::sys::net::Socket;
 use crate::sys_common::{self, AsInner, FromInner, IntoInner};
 
-#[cfg(any(target_os = "linux", target_os = "android",
-          target_os = "dragonfly", target_os = "freebsd",
-          target_os = "openbsd", target_os = "netbsd",
-          target_os = "haiku"))]
-use libc::MSG_NOSIGNAL;
-#[cfg(not(any(target_os = "linux", target_os = "android",
-              target_os = "dragonfly", target_os = "freebsd",
-              target_os = "openbsd", target_os = "netbsd",
-              target_os = "haiku")))]
 const MSG_NOSIGNAL: libc::c_int = 0x0;
 
 fn sun_path_offset(addr: &libc::sockaddr_un) -> usize {
@@ -202,13 +183,7 @@ impl SocketAddr {
         let len = self.len as usize - sun_path_offset(&self.addr);
         let path = unsafe { mem::transmute::<&[libc::c_char], &[u8]>(&self.addr.sun_path) };
 
-        // macOS seems to return a len of 16 and a zeroed sun_path for unnamed addresses
-        if len == 0
-            || (cfg!(not(any(target_os = "linux", target_os = "android")))
-                && self.addr.sun_path[0] == 0)
-        {
-            AddressKind::Unnamed
-        } else if self.addr.sun_path[0] == 0 {
+        if self.addr.sun_path[0] == 0 {
             AddressKind::Abstract(&path[1..len])
         } else {
             AddressKind::Pathname(OsStr::from_bytes(&path[..len - 1]).as_ref())