From bfd1078d3c45c61fd8e3661b6d1a646213ffb153 Mon Sep 17 00:00:00 2001
From: Jaremy Creechley <creechley@gmail.com>
Date: Sat, 24 Feb 2024 15:08:02 -0700
Subject: [PATCH] updates

---
 tests/exampleGcFailures/exFailureSeqSeq.nim | 71 +++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 tests/exampleGcFailures/exFailureSeqSeq.nim

diff --git a/tests/exampleGcFailures/exFailureSeqSeq.nim b/tests/exampleGcFailures/exFailureSeqSeq.nim
new file mode 100644
index 0000000..beffd08
--- /dev/null
+++ b/tests/exampleGcFailures/exFailureSeqSeq.nim
@@ -0,0 +1,71 @@
+import std/os
+import std/sequtils
+import chronos
+import chronos/threadsync
+import chronos/unittest2/asynctests
+import taskpools
+
+## create a probablistically likely failure of 
+## using sequence memory from another thread
+## with refc. 
+## 
+## However, unlike `exFailure.nim`, this can take
+## a while to run.
+## 
+## It may not always produce an error either, but
+## generally does so in a few seconds of running.
+## 
+
+type
+  SeqDataPtr*[T] = object
+    data*: ptr UncheckedArray[T]
+    size*: int
+
+template toOpenArray*[T](arr: SeqDataPtr[T]): auto =
+  system.toOpenArray(arr.data, 0, arr.size)
+
+proc toSeqDataPtr*[T](data: seq[T]): SeqDataPtr[T] =
+    SeqDataPtr[T](
+      data: cast[ptr UncheckedArray[T]](unsafeAddr(data[0])), size: data.len()
+    )
+
+proc worker(data: ptr seq[seq[char]], sig: ThreadSignalPtr) =
+  os.sleep(10)
+  echo "running worker: "
+  echo "worker: ", data[]
+  for i, d in data[]:
+    for j, c in d:
+      data[i][j] = char(c.uint8 + 10)
+  discard sig.fireSync()
+
+proc runTest(tp: TaskPool, sig: ThreadSignalPtr) {.async.} =
+  ## init
+  var obj1 = "hello world!".toSeq()
+  var obj2 = "goodbye denver!".toSeq()
+  var data = @[obj1, obj2]
+
+  # echo "spawn worker"
+  tp.spawn worker(addr data, sig)
+
+  ## adding fut.wait(100.milliseconds) creates memory issue
+  await wait(sig).wait(1.milliseconds)
+  ## just doing the wait is fine:
+  # await wait(sig)
+
+proc runTests(tp: TaskPool, sig: ThreadSignalPtr) {.async.} =
+  for i in 1..30_000:
+    try:
+      await runTest(tp, sig)
+    except AsyncTimeoutError:
+      # os.sleep(1)
+      # echo "looping..."
+      # GC_fullCollect()
+      discard
+
+suite "async tests":
+  var tp = Taskpool.new(num_threads = 2) # Default to the number of hardware threads.
+  let sig = ThreadSignalPtr.new().get()
+
+  asyncTest "test":
+    await runTests(tp, sig)
+    os.sleep(10_000)