1 files changed, 32 insertions, 0 deletions
diff --git a/src/include/fe_utils/cancel.h b/src/include/fe_utils/cancel.h
new file mode 100644
index 0000000..2a1169a
--- /dev/null
+++ b/src/include/fe_utils/cancel.h
@@ -0,0 +1,32 @@
+/*-------------------------------------------------------------------------
+ *
+ * Query cancellation support for frontend code
+ *
+ *
+ * Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/fe_utils/cancel.h
+ *
+ *-------------------------------------------------------------------------
+ */
+
+#ifndef CANCEL_H
+#define CANCEL_H
+
+#include <signal.h>
+
+#include "libpq-fe.h"
+
+extern volatile sig_atomic_t CancelRequested;
+
+extern void SetCancelConn(PGconn *conn);
+extern void ResetCancelConn(void);
+
+/*
+ * A callback can be optionally set up to be called at cancellation
+ * time.
+ */
+extern void setup_cancel_handler(void (*cancel_callback) (void));
+
+#endif							/* CANCEL_H */