diff --git a/.cargo_vcs_info.json b/.cargo_vcs_info.json
index 7e564f3..ec3f28f 100644
--- a/.cargo_vcs_info.json
+++ b/.cargo_vcs_info.json
@@ -1,5 +1,6 @@
 {
   "git": {
-    "sha1": "aecb031e795391025d33f3f26f83ab24102ca42f"
-  }
-}
+    "sha1": "847b5cab64fe3a87f853de0cac479d78e5a7ee77"
+  },
+  "path_in_vcs": "core"
+}
\ No newline at end of file
diff --git a/Android.bp b/Android.bp
index 9ce14b2..8ae1551 100644
--- a/Android.bp
+++ b/Android.bp
@@ -41,16 +41,14 @@
 
 rust_library {
     name: "libparking_lot_core",
-    // has rustc warnings
     host_supported: true,
     crate_name: "parking_lot_core",
     cargo_env_compat: true,
-    cargo_pkg_version: "0.8.5",
+    cargo_pkg_version: "0.9.1",
     srcs: ["src/lib.rs"],
     edition: "2018",
     rustlibs: [
         "libcfg_if",
-        "libinstant",
         "liblibc",
         "libsmallvec",
     ],
@@ -64,11 +62,10 @@
 
 rust_test {
     name: "parking_lot_core_test_src_lib",
-    // has rustc warnings
     host_supported: true,
     crate_name: "parking_lot_core",
     cargo_env_compat: true,
-    cargo_pkg_version: "0.8.5",
+    cargo_pkg_version: "0.9.1",
     srcs: ["src/lib.rs"],
     test_suites: ["general-tests"],
     auto_gen_config: true,
@@ -78,7 +75,6 @@
     edition: "2018",
     rustlibs: [
         "libcfg_if",
-        "libinstant",
         "liblibc",
         "libsmallvec",
     ],
diff --git a/Cargo.toml b/Cargo.toml
index 7afeb41..2fdf5e8 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,7 +12,7 @@
 [package]
 edition = "2018"
 name = "parking_lot_core"
-version = "0.8.5"
+version = "0.9.1"
 authors = ["Amanieu d'Antras <amanieu@gmail.com>"]
 description = "An advanced API for creating custom synchronization primitives."
 keywords = ["mutex", "condvar", "rwlock", "once", "thread"]
@@ -26,9 +26,6 @@
 [dependencies.cfg-if]
 version = "1.0.0"
 
-[dependencies.instant]
-version = "0.1.9"
-
 [dependencies.petgraph]
 version = "0.5.1"
 optional = true
@@ -47,6 +44,6 @@
 version = "0.2.8"
 [target."cfg(unix)".dependencies.libc]
 version = "0.2.95"
-[target."cfg(windows)".dependencies.winapi]
-version = "0.3.9"
-features = ["winnt", "ntstatus", "minwindef", "winerror", "winbase", "errhandlingapi", "handleapi"]
+[target."cfg(windows)".dependencies.windows-sys]
+version = "0.32"
+features = ["Win32_Foundation", "Win32_System_LibraryLoader", "Win32_System_SystemServices", "Win32_System_WindowsProgramming"]
diff --git a/Cargo.toml.orig b/Cargo.toml.orig
index 2585329..f053e45 100644
--- a/Cargo.toml.orig
+++ b/Cargo.toml.orig
@@ -1,6 +1,6 @@
 [package]
 name = "parking_lot_core"
-version = "0.8.5"
+version = "0.9.1"
 authors = ["Amanieu d'Antras <amanieu@gmail.com>"]
 description = "An advanced API for creating custom synchronization primitives."
 license = "Apache-2.0/MIT"
@@ -15,7 +15,6 @@
 petgraph = { version = "0.5.1", optional = true }
 thread-id = { version = "4.0.0", optional = true }
 backtrace = { version = "0.3.60", optional = true }
-instant = "0.1.9"
 
 [target.'cfg(unix)'.dependencies]
 libc = "0.2.95"
@@ -24,8 +23,12 @@
 redox_syscall = "0.2.8"
 
 [target.'cfg(windows)'.dependencies]
-winapi = { version = "0.3.9", features = ["winnt", "ntstatus", "minwindef",
-    "winerror", "winbase", "errhandlingapi", "handleapi"] }
+windows-sys = { version = "0.32", features = [
+    "Win32_Foundation",
+    "Win32_System_LibraryLoader",
+    "Win32_System_SystemServices",
+    "Win32_System_WindowsProgramming",
+] }
 
 [features]
 nightly = []
diff --git a/METADATA b/METADATA
index 15649a7..138cd87 100644
--- a/METADATA
+++ b/METADATA
@@ -7,13 +7,13 @@
   }
   url {
     type: ARCHIVE
-    value: "https://static.crates.io/crates/parking_lot_core/parking_lot_core-0.8.5.crate"
+    value: "https://static.crates.io/crates/parking_lot_core/parking_lot_core-0.9.1.crate"
   }
-  version: "0.8.5"
+  version: "0.9.1"
   license_type: NOTICE
   last_upgrade_date {
-    year: 2021
-    month: 9
-    day: 22
+    year: 2022
+    month: 3
+    day: 1
   }
 }
diff --git a/src/lib.rs b/src/lib.rs
index 27087f4..4845356 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -46,7 +46,7 @@
 #![cfg_attr(
     all(
         feature = "nightly",
-        target_arch = "wasm32",
+        target_family = "wasm",
         target_feature = "atomics"
     ),
     feature(stdsimd)
diff --git a/src/parking_lot.rs b/src/parking_lot.rs
index 519ce9e..9b84525 100644
--- a/src/parking_lot.rs
+++ b/src/parking_lot.rs
@@ -12,9 +12,33 @@
     ptr,
     sync::atomic::{AtomicPtr, AtomicUsize, Ordering},
 };
-use instant::Instant;
 use smallvec::SmallVec;
-use std::time::Duration;
+use std::time::{Duration, Instant};
+
+// Don't use Instant on wasm32-unknown-unknown, it just panics.
+cfg_if::cfg_if! {
+    if #[cfg(all(
+        target_family = "wasm",
+        target_os = "unknown",
+        target_vendor = "unknown"
+    ))] {
+        #[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
+        struct TimeoutInstant;
+        impl TimeoutInstant {
+            fn now() -> TimeoutInstant {
+                TimeoutInstant
+            }
+        }
+        impl core::ops::Add<Duration> for TimeoutInstant {
+            type Output = Self;
+            fn add(self, _rhs: Duration) -> Self::Output {
+                TimeoutInstant
+            }
+        }
+    } else {
+        use std::time::Instant as TimeoutInstant;
+    }
+}
 
 static NUM_THREADS: AtomicUsize = AtomicUsize::new(0);
 
@@ -47,7 +71,7 @@
         let new_size = (num_threads * LOAD_FACTOR).next_power_of_two();
         let hash_bits = 0usize.leading_zeros() - new_size.leading_zeros() - 1;
 
-        let now = Instant::now();
+        let now = TimeoutInstant::now();
         let mut entries = Vec::with_capacity(new_size);
         for i in 0..new_size {
             // We must ensure the seed is not zero
@@ -77,7 +101,7 @@
 
 impl Bucket {
     #[inline]
-    pub fn new(timeout: Instant, seed: u32) -> Self {
+    pub fn new(timeout: TimeoutInstant, seed: u32) -> Self {
         Self {
             mutex: WordLock::new(),
             queue_head: Cell::new(ptr::null()),
@@ -89,7 +113,7 @@
 
 struct FairTimeout {
     // Next time at which point be_fair should be set
-    timeout: Instant,
+    timeout: TimeoutInstant,
 
     // the PRNG state for calculating the next timeout
     seed: u32,
@@ -97,14 +121,14 @@
 
 impl FairTimeout {
     #[inline]
-    fn new(timeout: Instant, seed: u32) -> FairTimeout {
+    fn new(timeout: TimeoutInstant, seed: u32) -> FairTimeout {
         FairTimeout { timeout, seed }
     }
 
     // Determine whether we should force a fair unlock, and update the timeout
     #[inline]
     fn should_timeout(&mut self) -> bool {
-        let now = Instant::now();
+        let now = TimeoutInstant::now();
         if now > self.timeout {
             // Time between 0 and 1ms.
             let nanos = self.gen_u32() % 1_000_000;
diff --git a/src/spinwait.rs b/src/spinwait.rs
index ad0327a..a57f4c1 100644
--- a/src/spinwait.rs
+++ b/src/spinwait.rs
@@ -6,14 +6,14 @@
 // copied, modified, or distributed except according to those terms.
 
 use crate::thread_parker;
-use std::sync::atomic::spin_loop_hint;
+use core::hint::spin_loop;
 
 // Wastes some CPU time for the given number of iterations,
 // using a hint to indicate to the CPU that we are spinning.
 #[inline]
 fn cpu_relax(iterations: u32) {
     for _ in 0..iterations {
-        spin_loop_hint()
+        spin_loop()
     }
 }
 
diff --git a/src/thread_parker/generic.rs b/src/thread_parker/generic.rs
index 5236e14..990bcb7 100644
--- a/src/thread_parker/generic.rs
+++ b/src/thread_parker/generic.rs
@@ -8,9 +8,10 @@
 //! A simple spin lock based thread parker. Used on platforms without better
 //! parking facilities available.
 
-use core::sync::atomic::{spin_loop_hint, AtomicBool, Ordering};
-use instant::Instant;
+use core::sync::atomic::{AtomicBool, Ordering};
+use core::hint::spin_loop;
 use std::thread;
+use std::time::Instant;
 
 // Helper type for putting a thread to sleep until some other thread wakes it up
 pub struct ThreadParker {
@@ -42,7 +43,7 @@
     #[inline]
     unsafe fn park(&self) {
         while self.parked.load(Ordering::Acquire) != false {
-            spin_loop_hint();
+            spin_loop();
         }
     }
 
@@ -52,7 +53,7 @@
             if Instant::now() >= timeout {
                 return false;
             }
-            spin_loop_hint();
+            spin_loop();
         }
         true
     }
diff --git a/src/thread_parker/linux.rs b/src/thread_parker/linux.rs
index 766e63b..5d4e229 100644
--- a/src/thread_parker/linux.rs
+++ b/src/thread_parker/linux.rs
@@ -9,9 +9,9 @@
     ptr,
     sync::atomic::{AtomicI32, Ordering},
 };
-use instant::Instant;
 use libc;
 use std::thread;
+use std::time::Instant;
 
 // x32 Linux uses a non-standard type for tv_nsec in timespec.
 // See https://sourceware.org/bugzilla/show_bug.cgi?id=16437
diff --git a/src/thread_parker/mod.rs b/src/thread_parker/mod.rs
index a7e4bb6..fc162f4 100644
--- a/src/thread_parker/mod.rs
+++ b/src/thread_parker/mod.rs
@@ -1,5 +1,5 @@
 use cfg_if::cfg_if;
-use instant::Instant;
+use std::time::Instant;
 
 /// Trait for the platform thread parker implementation.
 ///
@@ -68,12 +68,12 @@
         mod imp;
     } else if #[cfg(all(
         feature = "nightly",
-        target_arch = "wasm32",
+        target_family = "wasm",
         target_feature = "atomics"
     ))] {
         #[path = "wasm_atomic.rs"]
         mod imp;
-    } else if #[cfg(target_arch = "wasm32")] {
+    } else if #[cfg(target_family = "wasm")] {
         #[path = "wasm.rs"]
         mod imp;
     } else {
diff --git a/src/thread_parker/redox.rs b/src/thread_parker/redox.rs
index cac06bc..fdf6bd1 100644
--- a/src/thread_parker/redox.rs
+++ b/src/thread_parker/redox.rs
@@ -9,8 +9,8 @@
     ptr,
     sync::atomic::{AtomicI32, Ordering},
 };
-use instant::Instant;
 use std::thread;
+use std::time::Instant;
 use syscall::{
     call::futex,
     data::TimeSpec,
diff --git a/src/thread_parker/sgx.rs b/src/thread_parker/sgx.rs
index 341efe2..bc76fe7 100644
--- a/src/thread_parker/sgx.rs
+++ b/src/thread_parker/sgx.rs
@@ -6,7 +6,7 @@
 // copied, modified, or distributed except according to those terms.
 
 use core::sync::atomic::{AtomicBool, Ordering};
-use instant::Instant;
+use std::time::Instant;
 use std::{
     io,
     os::fortanix_sgx::{
diff --git a/src/thread_parker/unix.rs b/src/thread_parker/unix.rs
index c2381e6..c52ead9 100644
--- a/src/thread_parker/unix.rs
+++ b/src/thread_parker/unix.rs
@@ -11,8 +11,8 @@
     cell::{Cell, UnsafeCell},
     mem::MaybeUninit,
 };
-use instant::Instant;
 use libc;
+use std::time::Instant;
 use std::{thread, time::Duration};
 
 // x32 Linux uses a non-standard type for tv_nsec in timespec.
diff --git a/src/thread_parker/wasm.rs b/src/thread_parker/wasm.rs
index ba4118c..657425f 100644
--- a/src/thread_parker/wasm.rs
+++ b/src/thread_parker/wasm.rs
@@ -8,8 +8,8 @@
 //! The wasm platform can't park when atomic support is not available.
 //! So this ThreadParker just panics on any attempt to park.
 
-use instant::Instant;
 use std::thread;
+use std::time::Instant;
 
 pub struct ThreadParker(());
 
diff --git a/src/thread_parker/wasm_atomic.rs b/src/thread_parker/wasm_atomic.rs
index 2128e93..f332aff 100644
--- a/src/thread_parker/wasm_atomic.rs
+++ b/src/thread_parker/wasm_atomic.rs
@@ -5,41 +5,13 @@
 // http://opensource.org/licenses/MIT>, at your option. This file may not be
 // copied, modified, or distributed except according to those terms.
 
-use cfg_if::cfg_if;
 use core::{
     arch::wasm32,
     sync::atomic::{AtomicI32, Ordering},
 };
-use instant::Instant;
-use std::time::Duration;
+use std::time::{Duration, Instant};
 use std::{convert::TryFrom, thread};
 
-cfg_if! {
-    if #[cfg(all(
-        target_arch = "wasm32",
-        target_os = "unknown",
-        target_vendor = "unknown"
-    ))] {
-        // This function serves as a polyfill for `Instant::checked_duration_since`, which is
-        // currently not implemented for wasm32-unknown-unknown.
-        // TODO: Remove this shim once it
-        fn checked_duration_since_now(other: Instant) -> Option<Duration> {
-            let now = Instant::now();
-
-            if other < now {
-                None
-            } else {
-                Some(other.duration_since(now))
-            }
-        }
-    } else {
-        // If we are not targeting wasm32, we can use the native `checked_duration_since`.
-        fn checked_duration_since_now(timeout: Instant) -> Option<Duration> {
-            timeout.checked_duration_since(Instant::now())
-        }
-    }
-}
-
 // Helper type for putting a thread to sleep until some other thread wakes it up
 pub struct ThreadParker {
     parked: AtomicI32,
@@ -83,7 +55,7 @@
     #[inline]
     unsafe fn park_until(&self, timeout: Instant) -> bool {
         while self.parked.load(Ordering::Acquire) == PARKED {
-            if let Some(left) = checked_duration_since_now(timeout) {
+            if let Some(left) = timeout.checked_duration_since(Instant::now()) {
                 let nanos_left = i64::try_from(left.as_nanos()).unwrap_or(i64::max_value());
                 let r = wasm32::memory_atomic_wait32(self.ptr(), PARKED, nanos_left);
                 debug_assert!(r == 0 || r == 1 || r == 2);
diff --git a/src/thread_parker/windows/keyed_event.rs b/src/thread_parker/windows/keyed_event.rs
index 7c37153..bbe45a4 100644
--- a/src/thread_parker/windows/keyed_event.rs
+++ b/src/thread_parker/windows/keyed_event.rs
@@ -6,24 +6,18 @@
 // copied, modified, or distributed except according to those terms.
 
 use core::{
+    ffi,
     mem::{self, MaybeUninit},
     ptr,
 };
-use instant::Instant;
 use std::sync::atomic::{AtomicUsize, Ordering};
-use winapi::{
-    shared::{
-        minwindef::{TRUE, ULONG},
-        ntdef::NTSTATUS,
-        ntstatus::{STATUS_SUCCESS, STATUS_TIMEOUT},
-    },
-    um::{
-        handleapi::CloseHandle,
-        libloaderapi::{GetModuleHandleA, GetProcAddress},
-        winnt::{
-            ACCESS_MASK, BOOLEAN, GENERIC_READ, GENERIC_WRITE, HANDLE, LARGE_INTEGER, LPCSTR,
-            PHANDLE, PLARGE_INTEGER, PVOID,
-        },
+use std::time::Instant;
+
+use windows_sys::Win32::{
+    Foundation::{CloseHandle, BOOLEAN, HANDLE, NTSTATUS, STATUS_SUCCESS, STATUS_TIMEOUT},
+    System::{
+        LibraryLoader::{GetModuleHandleA, GetProcAddress},
+        SystemServices::{GENERIC_READ, GENERIC_WRITE},
     },
 };
 
@@ -36,58 +30,49 @@
     handle: HANDLE,
     NtReleaseKeyedEvent: extern "system" fn(
         EventHandle: HANDLE,
-        Key: PVOID,
+        Key: *mut ffi::c_void,
         Alertable: BOOLEAN,
-        Timeout: PLARGE_INTEGER,
+        Timeout: *mut i64,
     ) -> NTSTATUS,
     NtWaitForKeyedEvent: extern "system" fn(
         EventHandle: HANDLE,
-        Key: PVOID,
+        Key: *mut ffi::c_void,
         Alertable: BOOLEAN,
-        Timeout: PLARGE_INTEGER,
+        Timeout: *mut i64,
     ) -> NTSTATUS,
 }
 
 impl KeyedEvent {
     #[inline]
-    unsafe fn wait_for(&self, key: PVOID, timeout: PLARGE_INTEGER) -> NTSTATUS {
-        (self.NtWaitForKeyedEvent)(self.handle, key, 0, timeout)
+    unsafe fn wait_for(&self, key: *mut ffi::c_void, timeout: *mut i64) -> NTSTATUS {
+        (self.NtWaitForKeyedEvent)(self.handle, key, false.into(), timeout)
     }
 
     #[inline]
-    unsafe fn release(&self, key: PVOID) -> NTSTATUS {
-        (self.NtReleaseKeyedEvent)(self.handle, key, 0, ptr::null_mut())
+    unsafe fn release(&self, key: *mut ffi::c_void) -> NTSTATUS {
+        (self.NtReleaseKeyedEvent)(self.handle, key, false.into(), ptr::null_mut())
     }
 
     #[allow(non_snake_case)]
     pub fn create() -> Option<KeyedEvent> {
         unsafe {
-            let ntdll = GetModuleHandleA(b"ntdll.dll\0".as_ptr() as LPCSTR);
-            if ntdll.is_null() {
+            let ntdll = GetModuleHandleA(b"ntdll.dll\0".as_ptr());
+            if ntdll == 0 {
                 return None;
             }
 
             let NtCreateKeyedEvent =
-                GetProcAddress(ntdll, b"NtCreateKeyedEvent\0".as_ptr() as LPCSTR);
-            if NtCreateKeyedEvent.is_null() {
-                return None;
-            }
+                GetProcAddress(ntdll, b"NtCreateKeyedEvent\0".as_ptr())?;
             let NtReleaseKeyedEvent =
-                GetProcAddress(ntdll, b"NtReleaseKeyedEvent\0".as_ptr() as LPCSTR);
-            if NtReleaseKeyedEvent.is_null() {
-                return None;
-            }
+                GetProcAddress(ntdll, b"NtReleaseKeyedEvent\0".as_ptr())?;
             let NtWaitForKeyedEvent =
-                GetProcAddress(ntdll, b"NtWaitForKeyedEvent\0".as_ptr() as LPCSTR);
-            if NtWaitForKeyedEvent.is_null() {
-                return None;
-            }
+                GetProcAddress(ntdll, b"NtWaitForKeyedEvent\0".as_ptr())?;
 
             let NtCreateKeyedEvent: extern "system" fn(
-                KeyedEventHandle: PHANDLE,
-                DesiredAccess: ACCESS_MASK,
-                ObjectAttributes: PVOID,
-                Flags: ULONG,
+                KeyedEventHandle: *mut HANDLE,
+                DesiredAccess: u32,
+                ObjectAttributes: *mut ffi::c_void,
+                Flags: u32,
             ) -> NTSTATUS = mem::transmute(NtCreateKeyedEvent);
             let mut handle = MaybeUninit::uninit();
             let status = NtCreateKeyedEvent(
@@ -120,7 +105,7 @@
 
     #[inline]
     pub unsafe fn park(&'static self, key: &AtomicUsize) {
-        let status = self.wait_for(key as *const _ as PVOID, ptr::null_mut());
+        let status = self.wait_for(key as *const _ as *mut ffi::c_void, ptr::null_mut());
         debug_assert_eq!(status, STATUS_SUCCESS);
     }
 
@@ -140,14 +125,13 @@
 
         // NT uses a timeout in units of 100ns. We use a negative value to
         // indicate a relative timeout based on a monotonic clock.
-        let mut nt_timeout: LARGE_INTEGER = mem::zeroed();
         let diff = timeout - now;
         let value = (diff.as_secs() as i64)
             .checked_mul(-10000000)
             .and_then(|x| x.checked_sub((diff.subsec_nanos() as i64 + 99) / 100));
 
-        match value {
-            Some(x) => *nt_timeout.QuadPart_mut() = x,
+        let mut nt_timeout = match value {
+            Some(x) => x,
             None => {
                 // Timeout overflowed, just sleep indefinitely
                 self.park(key);
@@ -155,7 +139,7 @@
             }
         };
 
-        let status = self.wait_for(key as *const _ as PVOID, &mut nt_timeout);
+        let status = self.wait_for(key as *const _ as *mut ffi::c_void, &mut nt_timeout);
         if status == STATUS_SUCCESS {
             return true;
         }
@@ -192,7 +176,7 @@
     fn drop(&mut self) {
         unsafe {
             let ok = CloseHandle(self.handle);
-            debug_assert_eq!(ok, TRUE);
+            debug_assert_eq!(ok, true.into());
         }
     }
 }
@@ -211,7 +195,7 @@
     #[inline]
     pub unsafe fn unpark(self) {
         if !self.key.is_null() {
-            let status = self.keyed_event.release(self.key as PVOID);
+            let status = self.keyed_event.release(self.key as *mut ffi::c_void);
             debug_assert_eq!(status, STATUS_SUCCESS);
         }
     }
diff --git a/src/thread_parker/windows/mod.rs b/src/thread_parker/windows/mod.rs
index 76dbb5d..1f5ed23 100644
--- a/src/thread_parker/windows/mod.rs
+++ b/src/thread_parker/windows/mod.rs
@@ -9,7 +9,7 @@
     ptr,
     sync::atomic::{AtomicPtr, AtomicUsize, Ordering},
 };
-use instant::Instant;
+use std::time::Instant;
 
 mod keyed_event;
 mod waitaddress;
@@ -177,7 +177,7 @@
     // libraries, but that'll probably take a lot longer than patching this here
     // and avoiding the `synchapi` feature entirely.
     extern "system" {
-        fn Sleep(a: winapi::shared::minwindef::DWORD);
+        fn Sleep(a: u32);
     }
     unsafe {
         // We don't use SwitchToThread here because it doesn't consider all
diff --git a/src/thread_parker/windows/waitaddress.rs b/src/thread_parker/windows/waitaddress.rs
index 862c5c6..dde0db7 100644
--- a/src/thread_parker/windows/waitaddress.rs
+++ b/src/thread_parker/windows/waitaddress.rs
@@ -9,30 +9,24 @@
     mem,
     sync::atomic::{AtomicUsize, Ordering},
 };
-use instant::Instant;
-use winapi::{
-    shared::{
-        basetsd::SIZE_T,
-        minwindef::{BOOL, DWORD, FALSE, TRUE},
-        winerror::ERROR_TIMEOUT,
-    },
-    um::{
-        errhandlingapi::GetLastError,
-        libloaderapi::{GetModuleHandleA, GetProcAddress},
-        winbase::INFINITE,
-        winnt::{LPCSTR, PVOID},
+use std::{ffi, time::Instant};
+use windows_sys::Win32::{
+    Foundation::{GetLastError, BOOL, ERROR_TIMEOUT},
+    System::{
+        LibraryLoader::{GetModuleHandleA, GetProcAddress},
+        WindowsProgramming::INFINITE,
     },
 };
 
 #[allow(non_snake_case)]
 pub struct WaitAddress {
     WaitOnAddress: extern "system" fn(
-        Address: PVOID,
-        CompareAddress: PVOID,
-        AddressSize: SIZE_T,
-        dwMilliseconds: DWORD,
+        Address: *mut ffi::c_void,
+        CompareAddress: *mut ffi::c_void,
+        AddressSize: usize,
+        dwMilliseconds: u32,
     ) -> BOOL,
-    WakeByAddressSingle: extern "system" fn(Address: PVOID),
+    WakeByAddressSingle: extern "system" fn(Address: *mut ffi::c_void),
 }
 
 impl WaitAddress {
@@ -42,20 +36,15 @@
             // MSDN claims that that WaitOnAddress and WakeByAddressSingle are
             // located in kernel32.dll, but they are lying...
             let synch_dll =
-                GetModuleHandleA(b"api-ms-win-core-synch-l1-2-0.dll\0".as_ptr() as LPCSTR);
-            if synch_dll.is_null() {
+                GetModuleHandleA(b"api-ms-win-core-synch-l1-2-0.dll\0".as_ptr());
+            if synch_dll == 0 {
                 return None;
             }
 
-            let WaitOnAddress = GetProcAddress(synch_dll, b"WaitOnAddress\0".as_ptr() as LPCSTR);
-            if WaitOnAddress.is_null() {
-                return None;
-            }
+            let WaitOnAddress = GetProcAddress(synch_dll, b"WaitOnAddress\0".as_ptr())?;
             let WakeByAddressSingle =
-                GetProcAddress(synch_dll, b"WakeByAddressSingle\0".as_ptr() as LPCSTR);
-            if WakeByAddressSingle.is_null() {
-                return None;
-            }
+                GetProcAddress(synch_dll, b"WakeByAddressSingle\0".as_ptr())?;
+
             Some(WaitAddress {
                 WaitOnAddress: mem::transmute(WaitOnAddress),
                 WakeByAddressSingle: mem::transmute(WakeByAddressSingle),
@@ -77,7 +66,7 @@
     pub fn park(&'static self, key: &AtomicUsize) {
         while key.load(Ordering::Acquire) != 0 {
             let r = self.wait_on_address(key, INFINITE);
-            debug_assert!(r == TRUE);
+            debug_assert!(r == true.into());
         }
     }
 
@@ -94,14 +83,14 @@
                 .checked_mul(1000)
                 .and_then(|x| x.checked_add((diff.subsec_nanos() as u64 + 999999) / 1000000))
                 .map(|ms| {
-                    if ms > <DWORD>::max_value() as u64 {
+                    if ms > std::u32::MAX as u64 {
                         INFINITE
                     } else {
-                        ms as DWORD
+                        ms as u32
                     }
                 })
                 .unwrap_or(INFINITE);
-            if self.wait_on_address(key, timeout) == FALSE {
+            if self.wait_on_address(key, timeout) == false.into() {
                 debug_assert_eq!(unsafe { GetLastError() }, ERROR_TIMEOUT);
             }
         }
@@ -120,12 +109,12 @@
     }
 
     #[inline]
-    fn wait_on_address(&'static self, key: &AtomicUsize, timeout: DWORD) -> BOOL {
+    fn wait_on_address(&'static self, key: &AtomicUsize, timeout: u32) -> BOOL {
         let cmp = 1usize;
         (self.WaitOnAddress)(
-            key as *const _ as PVOID,
-            &cmp as *const _ as PVOID,
-            mem::size_of::<usize>() as SIZE_T,
+            key as *const _ as *mut ffi::c_void,
+            &cmp as *const _ as *mut ffi::c_void,
+            mem::size_of::<usize>(),
             timeout,
         )
     }
@@ -144,6 +133,6 @@
     // released to avoid blocking the queue for too long.
     #[inline]
     pub fn unpark(self) {
-        (self.waitaddress.WakeByAddressSingle)(self.key as PVOID);
+        (self.waitaddress.WakeByAddressSingle)(self.key as *mut ffi::c_void);
     }
 }