pw_thread_threadx: adds yield, id, and sleep backends

Adds the ThreadX backend for pw_thread's yield, sleep, and id.

Change-Id: I3aba539632b9d4dbc90b2d1498365213dd44e7cf
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/31541
Pigweed-Auto-Submit: Ewout van Bekkum <ewout@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
Reviewed-by: Wyatt Hepler <hepler@google.com>
diff --git a/pw_thread_threadx/public_overrides/pw_thread_backend/id_inline.h b/pw_thread_threadx/public_overrides/pw_thread_backend/id_inline.h
new file mode 100644
index 0000000..046e842
--- /dev/null
+++ b/pw_thread_threadx/public_overrides/pw_thread_backend/id_inline.h
@@ -0,0 +1,16 @@
+// Copyright 2020 The Pigweed Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License. You may obtain a copy of
+// the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations under
+// the License.
+#pragma once
+
+#include "pw_thread_threadx/id_inline.h"
diff --git a/pw_thread_threadx/public_overrides/pw_thread_backend/id_native.h b/pw_thread_threadx/public_overrides/pw_thread_backend/id_native.h
new file mode 100644
index 0000000..bf144dd
--- /dev/null
+++ b/pw_thread_threadx/public_overrides/pw_thread_backend/id_native.h
@@ -0,0 +1,16 @@
+// Copyright 2020 The Pigweed Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License. You may obtain a copy of
+// the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations under
+// the License.
+#pragma once
+
+#include "pw_thread_threadx/id_native.h"
diff --git a/pw_thread_threadx/public_overrides/pw_thread_backend/sleep_inline.h b/pw_thread_threadx/public_overrides/pw_thread_backend/sleep_inline.h
new file mode 100644
index 0000000..7f1cea9
--- /dev/null
+++ b/pw_thread_threadx/public_overrides/pw_thread_backend/sleep_inline.h
@@ -0,0 +1,16 @@
+// Copyright 2020 The Pigweed Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License. You may obtain a copy of
+// the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations under
+// the License.
+#pragma once
+
+#include "pw_thread_threadx/sleep_inline.h"
diff --git a/pw_thread_threadx/public_overrides/pw_thread_backend/yield_inline.h b/pw_thread_threadx/public_overrides/pw_thread_backend/yield_inline.h
new file mode 100644
index 0000000..c97d259
--- /dev/null
+++ b/pw_thread_threadx/public_overrides/pw_thread_backend/yield_inline.h
@@ -0,0 +1,16 @@
+// Copyright 2020 The Pigweed Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License. You may obtain a copy of
+// the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations under
+// the License.
+#pragma once
+
+#include "pw_thread_threadx/yield_inline.h"