Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 71 insertions, 0 deletions

diff --git a/third_party/rust/redox_syscall/src/io/io.rs b/third_party/rust/redox_syscall/src/io/io.rs
new file mode 100644
index 0000000000..2c4acd3883
--- /dev/null
+++ b/third_party/rust/redox_syscall/src/io/io.rs
@@ -0,0 +1,71 @@
+use core::cmp::PartialEq;
+use core::ops::{BitAnd, BitOr, Not};
+
+pub trait Io {
+    type Value: Copy + PartialEq + BitAnd<Output = Self::Value> + BitOr<Output = Self::Value> + Not<Output = Self::Value>;
+
+    fn read(&self) -> Self::Value;
+    fn write(&mut self, value: Self::Value);
+
+    #[inline(always)]
+    fn readf(&self, flags: Self::Value) -> bool  {
+        (self.read() & flags) as Self::Value == flags
+    }
+
+    #[inline(always)]
+    fn writef(&mut self, flags: Self::Value, value: bool) {
+        let tmp: Self::Value = match value {
+            true => self.read() | flags,
+            false => self.read() & !flags,
+        };
+        self.write(tmp);
+    }
+}
+
+pub struct ReadOnly<I> {
+    inner: I
+}
+
+impl<I> ReadOnly<I> {
+    pub const fn new(inner: I) -> ReadOnly<I> {
+        ReadOnly {
+            inner: inner
+        }
+    }
+}
+
+impl<I: Io> ReadOnly<I> {
+    #[inline(always)]
+    pub fn read(&self) -> I::Value {
+        self.inner.read()
+    }
+
+    #[inline(always)]
+    pub fn readf(&self, flags: I::Value) -> bool {
+        self.inner.readf(flags)
+    }
+}
+
+pub struct WriteOnly<I> {
+    inner: I
+}
+
+impl<I> WriteOnly<I> {
+    pub const fn new(inner: I) -> WriteOnly<I> {
+        WriteOnly {
+            inner: inner
+        }
+    }
+}
+
+impl<I: Io> WriteOnly<I> {
+    #[inline(always)]
+    pub fn write(&mut self, value: I::Value) {
+        self.inner.write(value)
+    }
+
+    #[inline(always)]
+    pub fn writef(&mut self, flags: I::Value, value: bool) {
+        self.inner.writef(flags, value)
+    }
+}