harden attach sponsor process (#14)

- Improvement: Delay exiting due to no sponsor processes by one second to handle race conditions
- Improvement: Safer IsProcessRunning check
- Improvement: make sure we can RequestApplicationExit safely from any thread

1 files changed, 8 insertions, 3 deletions

diff --git a/src/zencore/zencore.cpp b/src/zencore/zencore.cpp
index d0acac608..b80b1d280 100644
--- a/src/zencore/zencore.cpp
+++ b/src/zencore/zencore.cpp
@@ -115,11 +115,16 @@ IsApplicationExitRequested()
 	return s_ApplicationExitRequested;
 }
 
-void
+bool
 RequestApplicationExit(int ExitCode)
 {
-	s_ApplicationExitCode	   = ExitCode;
-	s_ApplicationExitRequested = true;
+	bool Expected = false;
+	if (s_ApplicationExitRequested.compare_exchange_weak(Expected, true))
+	{
+		s_ApplicationExitCode = ExitCode;
+		return true;
+	}
+	return false;
 }
 
 int