threads: begin change to cooperative threading

src/concurrency/BaseThread.cpp

@@ -1,4 +1,4 @@
-#include "Thread.h"
+#include "BaseThread.h"
 #include <assert.h>
 
 namespace concurrency

src/concurrency/OSThread.h

@@ -7,11 +7,11 @@ namespace concurrency
 {
 
 #ifdef HAS_FREE_RTOS
-typedef FreeRtosThread Thread;
+typedef FreeRtosThread OSThread;
 #endif
 
 #ifdef __unix__
-typedef PosixThread Thread;
+typedef PosixThread OSThread;
 #endif
 
 } // namespace concurrency

src/concurrency/WorkerThread.h

@@ -1,6 +1,6 @@
 #pragma once
 
-#include "Thread.h"
+#include "OSThread.h"
 
 namespace concurrency {
 
@@ -10,7 +10,7 @@ namespace concurrency {
  *
  * @link https://www.freertos.org/RTOS_Task_Notification_As_Mailbox.html
  */
-class WorkerThread : public Thread
+class WorkerThread : public OSThread
 {
   protected:
     /**