1 files changed, 98 insertions, 0 deletions
diff --git a/ipc/ipdl/test/cxx/TestNestedLoops.cpp b/ipc/ipdl/test/cxx/TestNestedLoops.cpp
new file mode 100644
index 000000000..0e0ba496d
--- /dev/null
+++ b/ipc/ipdl/test/cxx/TestNestedLoops.cpp
@@ -0,0 +1,98 @@
+#include "base/basictypes.h"
+
+#include "nsThreadUtils.h"
+
+#include "TestNestedLoops.h"
+
+#include "IPDLUnitTests.h"      // fail etc.
+
+namespace mozilla {
+namespace _ipdltest {
+
+//-----------------------------------------------------------------------------
+// parent
+
+TestNestedLoopsParent::TestNestedLoopsParent() : mBreakNestedLoop(false)
+{
+    MOZ_COUNT_CTOR(TestNestedLoopsParent);
+}
+
+TestNestedLoopsParent::~TestNestedLoopsParent()
+{
+    MOZ_COUNT_DTOR(TestNestedLoopsParent);
+}
+
+void
+TestNestedLoopsParent::Main()
+{
+    if (!SendStart())
+        fail("sending Start");
+
+    // sigh ... spin for a while to let Nonce arrive
+    puts(" (sleeping to wait for nonce ... sorry)");
+    PR_Sleep(5000);
+
+    // while waiting for the reply to R, we'll receive Nonce
+    if (!CallR())
+        fail("calling R");
+
+    Close();
+}
+
+bool
+TestNestedLoopsParent::RecvNonce()
+{
+    // if we have an OnMaybeDequeueOne waiting for us (we may not, due
+    // to the inherent race condition in this test, then this event
+    // must be ordered after it in the queue
+    MessageLoop::current()->PostTask(
+        NewNonOwningRunnableMethod(this, &TestNestedLoopsParent::BreakNestedLoop));
+
+    // sigh ... spin for a while to let the reply to R arrive
+    puts(" (sleeping to wait for reply to R ... sorry)");
+    PR_Sleep(5000);
+
+    // sigh ... we have no idea when code might do this
+    do {
+        if (!NS_ProcessNextEvent(nullptr, false))
+            fail("expected at least one pending event");
+    } while (!mBreakNestedLoop);
+
+    return true;
+}
+
+void
+TestNestedLoopsParent::BreakNestedLoop()
+{
+    mBreakNestedLoop = true;
+}
+
+//-----------------------------------------------------------------------------
+// child
+
+TestNestedLoopsChild::TestNestedLoopsChild()
+{
+    MOZ_COUNT_CTOR(TestNestedLoopsChild);
+}
+
+TestNestedLoopsChild::~TestNestedLoopsChild()
+{
+    MOZ_COUNT_DTOR(TestNestedLoopsChild);
+}
+
+bool
+TestNestedLoopsChild::RecvStart()
+{
+    if (!SendNonce())
+        fail("sending Nonce");
+    return true;
+}
+
+bool
+TestNestedLoopsChild::AnswerR()
+{
+    return true;
+}
+
+} // namespace _ipdltest
+} // namespace mozilla