Changes for better alignment with the wal2 branch.

FossilOrigin-Name: 4fab85b3d0d1cad2d185f2456de7ddf281badf8561cc051e10e16655441dcc84

1 files changed, 16 insertions, 0 deletions

diff --git a/src/pager.h b/src/pager.h
index 7ef9a237a..9b2cfc0bc 100644
--- a/src/pager.h
+++ b/src/pager.h
@@ -83,6 +83,22 @@ typedef struct PgHdr DbPage;
 #define PAGER_JOURNALMODE_MEMORY      4   /* In-memory journal file */
 #define PAGER_JOURNALMODE_WAL         5   /* Use write-ahead logging */
 
+#define isWalMode(x) ((x)==PAGER_JOURNALMODE_WAL)
+
+/*
+** The argument to this macro is a file descriptor (type sqlite3_file*).
+** Return 0 if it is not open, or non-zero (but not 1) if it is.
+**
+** This is so that expressions can be written as:
+**
+**   if( isOpen(pPager->jfd) ){ ...
+**
+** instead of
+**
+**   if( pPager->jfd->pMethods ){ ...
+*/
+#define isOpen(pFd) ((pFd)->pMethods!=0)
+
 /*
 ** Flags that make up the mask passed to sqlite3PagerGet().
 */