diff options
Diffstat (limited to 'src/fe_utils/cancel.c')
| -rw-r--r-- | src/fe_utils/cancel.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/src/fe_utils/cancel.c b/src/fe_utils/cancel.c index 04e0d1e3b2d..9c3922b5c40 100644 --- a/src/fe_utils/cancel.c +++ b/src/fe_utils/cancel.c @@ -16,7 +16,6 @@ #include "postgres_fe.h" -#include <signal.h> #include <unistd.h> #include "fe_utils/cancel.h" @@ -37,8 +36,20 @@ (void) rc_; \ } while (0) +/* + * Contains all the information needed to cancel a query issued from + * a database connection to the backend. + */ static PGcancel *volatile cancelConn = NULL; -bool CancelRequested = false; + +/* + * CancelRequested tracks if a cancellation request has completed after + * a signal interruption. Note that if cancelConn is not set, in short + * if SetCancelConn() was never called or if ResetCancelConn() freed + * the cancellation object, then CancelRequested is switched to true after + * all cancellation attempts. + */ +volatile sig_atomic_t CancelRequested = false; #ifdef WIN32 static CRITICAL_SECTION cancelConnLock; |