feat(core): sync io ops in core (#18603)

This commit adds op_read_sync and op_write_sync to core. These ops are
similar to op_read and op_write, but they are synchronous. Just like the
async ops, they operate on generic `deno_core::Resource` objects. These
now have new `read_byob_sync` and `write_sync` methods, with default
implementations throwing "NotSupported" errors, just like the async
counterparts.

There are no `write_all` or `read` equivalents, because the
optimizations they unlock are not useful in synchronous contexts.

1 files changed, 12 insertions, 0 deletions

diff --git a/core/resources.rs b/core/resources.rs
index 5bec68481..6ca86e10b 100644
--- a/core/resources.rs
+++ b/core/resources.rs
@@ -154,6 +154,18 @@ pub trait Resource: Any + 'static {
     })
   }
 
+  /// The same as [`read_byob()`][Resource::read_byob], but synchronous.
+  fn read_byob_sync(&self, data: &mut [u8]) -> Result<usize, Error> {
+    _ = data;
+    Err(not_supported())
+  }
+
+  /// The same as [`write()`][Resource::write], but synchronous.
+  fn write_sync(&self, data: &[u8]) -> Result<usize, Error> {
+    _ = data;
+    Err(not_supported())
+  }
+
   /// The shutdown method can be used to asynchronously close the resource. It
   /// is not automatically called when the resource is dropped or closed.
   ///