Vendor dependencies for 0.3.0 release

vendor/mach2/src/vm_page_size.rs

@@ -0,0 +1,40 @@
+//! This module roughly corresponds to `mach/vm_page_size.h`
+
+use vm_types::{mach_vm_offset_t, mach_vm_size_t, vm_size_t};
+
+extern "C" {
+    pub static vm_page_size: vm_size_t;
+    pub static vm_page_mask: vm_size_t;
+    pub static vm_page_shift: ::libc::c_int;
+}
+
+#[allow(clippy::missing_safety_doc)] // FIXME
+pub unsafe fn mach_vm_trunc_page(x: mach_vm_offset_t) -> mach_vm_offset_t {
+    x & !(vm_page_mask as mach_vm_size_t)
+}
+
+#[allow(clippy::missing_safety_doc)] // FIXME
+pub unsafe fn mach_vm_round_page(x: mach_vm_offset_t) -> mach_vm_offset_t {
+    (x + vm_page_mask as mach_vm_size_t) & !(vm_page_mask as mach_vm_size_t)
+}
+
+#[cfg(test)]
+mod tests {
+    use vm_page_size::*;
+    use vm_types::mach_vm_size_t;
+
+    #[test]
+    fn page_size() {
+        unsafe {
+            assert!(vm_page_size > 0);
+            assert!(vm_page_size % 2 == 0);
+            assert_eq!(mach_vm_round_page(1), vm_page_size as mach_vm_size_t);
+
+            #[cfg(target_arch = "aarch64")]
+            assert_eq!(vm_page_size, 16384);
+
+            #[cfg(not(target_arch = "aarch64"))]
+            assert_eq!(vm_page_size, 4096);
+        }
+    }
+}