src/include/fe_utils/cancel.h

   1 /*-------------------------------------------------------------------------
   2  *
   3  * Query cancellation support for frontend code
   4  *
   5  *
   6  * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
   7  * Portions Copyright (c) 1994, Regents of the University of California
   8  *
   9  * src/include/fe_utils/cancel.h
  10  *
  11  *-------------------------------------------------------------------------
  12  */
  13
  14 #ifndef CANCEL_H
  15 #define CANCEL_H
  16
  17 #include <signal.h>
  18
  19 #include "libpq-fe.h"
  20
  21 extern volatile sig_atomic_t CancelRequested;
  22
  23 extern void SetCancelConn(PGconn *conn);
  24 extern void ResetCancelConn(void);
  25
  26 /*
  27  * A callback can be optionally set up to be called at cancellation
  28  * time.
  29  */
  30 extern void setup_cancel_handler(void (*cancel_callback) (void));
  31
  32 #endif                                                  /* CANCEL_H */