Introduce PM_TRANS_FLAG_NOLOCK

This flag indicates that the front-end will not call alpm_trans_commit(),
so the database needn't be locked. This is the first step toward fixing
FS#8905.

If this flag is set, alpm_trans_commit() does nothing and returns with
an error (that has new code: PM_ERR_TRANS_NOT_LOCKED).

Signed-off-by: Nagy Gabor <ngaba@bibl.u-szeged.hu>
Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/libalpm/alpm.h b/lib/libalpm/alpm.h
index 57ea8806..5cf1e940 100644
--- a/lib/libalpm/alpm.h
+++ b/lib/libalpm/alpm.h
@@ -276,7 +276,8 @@ typedef enum _pmtransflag_t {
 	PM_TRANS_FLAG_NEEDED = 0x2000,
 	PM_TRANS_FLAG_ALLEXPLICIT = 0x4000,
 	PM_TRANS_FLAG_UNNEEDED = 0x8000,
-	PM_TRANS_FLAG_RECURSEALL = 0x10000
+	PM_TRANS_FLAG_RECURSEALL = 0x10000,
+	PM_TRANS_FLAG_NOLOCK = 0x20000
 } pmtransflag_t;
 
 /**
@@ -487,6 +488,7 @@ enum _pmerrno_t {
 	PM_ERR_TRANS_NOT_PREPARED,
 	PM_ERR_TRANS_ABORT,
 	PM_ERR_TRANS_TYPE,
+	PM_ERR_TRANS_NOT_LOCKED,
 	/* Packages */
 	PM_ERR_PKG_NOT_FOUND,
 	PM_ERR_PKG_IGNORED,