moved configs to dedicated directory

nimbus_unified/configs/nimbus_configs.nim

@@ -0,0 +1,34 @@
+# nimbus_unified
+# Copyright (c) 2024 Status Research & Development GmbH
+# Licensed and distributed under either of
+#   * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
+#   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
+# at your option. This file may not be copied, modified, or distributed except according to those terms.
+
+import std/[atomics, tables], beacon_chain/nimbus_binary_common
+
+## Exceptions
+type NimbusTasksError* = object of CatchableError
+
+## Configuration
+## TODO: implement a json (or other format like yaml) config reader for config reading (file config scenarios)
+## TODO: implement a command line reader to read arguments
+type NimbusConfig* = object
+  configTable: Table[string, string]
+
+## Nimbus workers arguments (thread arguments)
+type TaskParameters* = object
+  name*: string
+  configs*: string
+    # TODO: replace this with the extracted configs from NimbusConfig needed by the worker
+
+## Task shutdown flag
+## The behaviour required: this thread needs to atomically change the flag value when
+##  a shutdown is required or when detects a stopped thread.
+## Given the behaviour wanted, atomic operations are sufficient without barriers or fences. Compilers
+##  may reorder instructions, but given that the order is not important, this does not affect
+##  the semantic wanted: If instructions are reordered, the worker will fail to read on the current iteration
+##  but will read it correctly on the next iteration ( this thread is the only on which changes the flag behaviour,
+##  and will always change it to true)
+var isShutDownRequired*: Atomic[bool]
+isShutDownRequired.store(false)