Restore global_filter feature

Split layer.rs into smaller files
Make EtwLayer and EtwFilter more common

Cargo.toml

@@ -12,6 +12,7 @@ authors = ["Kyle Sabo", "Microsoft"]
 crate-type = ["rlib"]
 
 [features]
+global_filter = []
 common_schema = []
 default = ["common_schema"]
 

src/_details.rs

@@ -1,11 +1,9 @@
-// Module for internal structs that need to be publically accessible,
+// Module for internal structs that need to be publicly accessible,
 // but should not be directly used by consumers of the crate.
 //
 // Implementations for these structs are contained in other files.
 
-use std::{marker::PhantomData, pin::Pin, sync::Arc};
 
-use crate::native::ProviderTypes;
 
 // Public with public fields because the `etw_event!` macro needs to create it at invocation site.
 #[doc(hidden)]
@@ -14,26 +12,3 @@ pub struct EventMetadata {
     pub identity: tracing::callsite::Identifier,
     pub event_tag: u32,
 }
-
-// This struct needs to be public as it implements the tracing_subscriber::Layer trait.
-#[doc(hidden)]
-pub struct EtwLayer<S, Mode: ProviderTypes>
-where
-    Mode::Provider: crate::native::EventWriter<Mode> + 'static
-{
-    pub(crate) provider: Pin<Arc<Mode::Provider>>,
-    pub(crate) default_keyword: u64,
-    pub(crate) _p: PhantomData<S>,
-}
-
-// This struct needs to be public as it implements the tracing_subscriber::Layer::Filter trait.
-#[doc(hidden)]
-pub struct EtwFilter<S, Mode: ProviderTypes>
-where
-    Mode::Provider: crate::native::EventWriter<Mode> + 'static
-{
-    pub(crate) provider: Pin<Arc<Mode::Provider>>,
-    pub(crate) default_keyword: u64,
-    pub(crate) _p: PhantomData<S>,
-    pub(crate) _m: PhantomData<Mode>,
-}