fix wrong ulock timeout calculation, add version check for ios

core/sync/futex_darwin.odin

@@ -12,6 +12,7 @@ foreign System {
 	// __ulock_wait is not available on 10.15
 	// See https://github.com/odin-lang/Odin/issues/1959
 	__ulock_wait  :: proc "c" (operation: u32, addr: rawptr, value: u64, timeout_us: u32) -> c.int ---
+	// >= MacOS 11.
 	__ulock_wait2 :: proc "c" (operation: u32, addr: rawptr, value: u64, timeout_ns: u64, value2: u64) -> c.int ---
 	__ulock_wake  :: proc "c" (operation: u32, addr: rawptr, wake_value: u64) -> c.int ---
 }
@@ -57,12 +58,14 @@ _futex_wait_with_timeout :: proc "contextless" (f: ^Futex, expected: u32, durati
 		timeout_ns := u64(duration)
 		s := __ulock_wait2(UL_COMPARE_AND_WAIT | ULF_NO_ERRNO, f, u64(expected), timeout_ns, 0)
 	} else {
-		timeout_us := u32(duration) * 1000
+		timeout_us := u32(duration / time.Microsecond)
 		s := __ulock_wait(UL_COMPARE_AND_WAIT | ULF_NO_ERRNO, f, u64(expected), timeout_us)
 	}
+
 	if s >= 0 {
 		return true
 	}
+
 	switch s {
 	case EINTR, EFAULT:
 		return true

core/sys/darwin/sync.odin

@@ -5,6 +5,7 @@ foreign import system "system:System.framework"
 // #define OS_WAIT_ON_ADDR_AVAILABILITY \
 // 	__API_AVAILABLE(macos(14.4), ios(17.4), tvos(17.4), watchos(10.4))
 when ODIN_OS == .Darwin {
+
 	when ODIN_PLATFORM_SUBTARGET == .iOS && ODIN_MINIMUM_OS_VERSION >= 17_04_00 {
 		WAIT_ON_ADDRESS_AVAILABLE :: true
 	} else when ODIN_MINIMUM_OS_VERSION >= 14_04_00 {
@@ -12,7 +13,10 @@ when ODIN_OS == .Darwin {
 	} else {
 		WAIT_ON_ADDRESS_AVAILABLE :: false
 	}
-	when ODIN_MINIMUM_OS_VERSION >= 11_00_00 {
+
+	when ODIN_PLATFORM_SUBTARGET == .iOS && ODIN_MINIMUM_OS_VERSION >= 14_00_00 {
+		ULOCK_WAIT_2_AVAILABLE :: true
+	} else when ODIN_MINIMUM_OS_VERSION >= 11_00_00 {
 		ULOCK_WAIT_2_AVAILABLE :: true
 	} else {
 		ULOCK_WAIT_2_AVAILABLE :: false
@@ -20,7 +24,7 @@ when ODIN_OS == .Darwin {
 
 } else {
 	WAIT_ON_ADDRESS_AVAILABLE :: false
-	ULOCK_WAIT_2_AVAILABLE :: false
+	ULOCK_WAIT_2_AVAILABLE    :: false
 }
 
 os_sync_wait_on_address_flag :: enum u32 {