feat: introduce some changes/additions from test/use-cases branch

But without introducing the use cases tests themselves nor their dependencies
in vendor.

.github/workflows/test.yml

@@ -81,7 +81,7 @@ jobs:
         run: |
           make -j${NPROC} NIMFLAGS="--parallelBuild:${NPROC}" V=1 test
 
-      - name: Build and run channel_helgrind
+      - name: Build and run helgrind tasks
         if: matrix.platform.os == 'ubuntu'
         run: |
-          ./env.sh nimble channel_helgrind
+          ./env.sh nimble achannels_helgrind

Makefile

@@ -9,6 +9,7 @@ BUILD_SYSTEM_DIR := vendor/nimbus-build-system
 .PHONY: \
 	all \
 	clean \
+	clean-build-dirs \
 	deps \
 	test \
 	update

task_runner.nim

@@ -9,6 +9,6 @@
 #             Licensed under either of
 #  Apache License, version 2.0, (LICENSE-APACHEv2)
 #             MIT license (LICENSE-MIT)
-import ./task_runner/achannels
+import ./task_runner/achannels, ./task_runner/sys
 
-export achannels
+export achannels, sys

task_runner.nimble

@@ -26,6 +26,7 @@ proc buildAndRunTest(name: string,
     " --debugger:native" &
     " --define:chronicles_line_numbers" &
     " --define:debug" &
+    " --define:ssl" &
     " --linetrace:on" &
     " --nimcache:nimcache/test/" & name &
     " --out:" & outDir & name &
@@ -43,13 +44,13 @@ proc buildAndRunTest(name: string,
 task tests, "Run all tests":
   buildAndRunTest "test_all"
 
-task channel_helgrind, "Run channel implementation through helgrind to detect threading or lock errors":
+task achannels_helgrind, "Run channel implementation through helgrind to detect threading or lock errors":
   rmDir "test/build/"
   mkDir "test/build/"
   var commands = [
     "nim c" &
     " --define:useMalloc" &
-    " --nimcache:nimcache/test/channel_helgrind" &
+    " --nimcache:nimcache/test/achannels_helgrind" &
     " --out:test/build/test_achannels" &
     " --threads:on" &
     " --tlsEmulation:off" &

task_runner/sys.nim

@@ -0,0 +1,12 @@
+type
+  ThreadSafeString* = distinct cstring
+
+proc safe*(input: string): ThreadSafeString =
+  var res = cast[cstring](allocShared(input.len + 1))
+  copyMem(res, input.cstring, input.len)
+  res[input.len] = '\0'
+  res.ThreadSafeString
+
+proc `$`*(input: ThreadSafeString): string =
+  result = $(input.cstring)
+  deallocShared input.cstring

test/test_helpers.nim

@@ -0,0 +1,12 @@
+import chronos, unittest
+
+template asyncTest*(name, body: untyped) =
+  test name:
+    proc scenario {.async.} = body
+    waitFor scenario()
+
+template procSuite*(name, body: untyped) =
+  proc suitePayload =
+    suite name:
+      body
+  suitePayload()