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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2017-04-10 13:51:29 -0400 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2017-04-10 13:51:53 -0400 |
| commit | 8f0530f58061b185dc385df42e62d78a18d4ae3e (patch) | |
| tree | 63d038ae4012dcdcff3b556dde4c654959f8448e /src/backend/commands/async.c | |
| parent | 56dd8e85c40fef3e3c2c10afa186ee30416ec507 (diff) | |
| download | postgresql-8f0530f58061b185dc385df42e62d78a18d4ae3e.tar.gz postgresql-8f0530f58061b185dc385df42e62d78a18d4ae3e.zip | |
Improve castNode notation by introducing list-extraction-specific variants.
This extends the castNode() notation introduced by commit 5bcab1114 to
provide, in one step, extraction of a list cell's pointer and coercion to
a concrete node type. For example, "lfirst_node(Foo, lc)" is the same
as "castNode(Foo, lfirst(lc))". Almost half of the uses of castNode
that have appeared so far include a list extraction call, so this is
pretty widely useful, and it saves a few more keystrokes compared to the
old way.
As with the previous patch, back-patch the addition of these macros to
pg_list.h, so that the notation will be available when back-patching.
Patch by me, after an idea of Andrew Gierth's.
Discussion: https://postgr.es/m/14197.1491841216@sss.pgh.pa.us
Diffstat (limited to 'src/backend/commands/async.c')
| -rw-r--r-- | src/backend/commands/async.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/src/backend/commands/async.c b/src/backend/commands/async.c index e32d7a1d4ec..87b215d8d32 100644 --- a/src/backend/commands/async.c +++ b/src/backend/commands/async.c @@ -1636,7 +1636,7 @@ AtSubCommit_Notify(void) List *parentPendingActions; List *parentPendingNotifies; - parentPendingActions = castNode(List, linitial(upperPendingActions)); + parentPendingActions = linitial_node(List, upperPendingActions); upperPendingActions = list_delete_first(upperPendingActions); Assert(list_length(upperPendingActions) == @@ -1647,7 +1647,7 @@ AtSubCommit_Notify(void) */ pendingActions = list_concat(parentPendingActions, pendingActions); - parentPendingNotifies = castNode(List, linitial(upperPendingNotifies)); + parentPendingNotifies = linitial_node(List, upperPendingNotifies); upperPendingNotifies = list_delete_first(upperPendingNotifies); Assert(list_length(upperPendingNotifies) == @@ -1679,13 +1679,13 @@ AtSubAbort_Notify(void) */ while (list_length(upperPendingActions) > my_level - 2) { - pendingActions = castNode(List, linitial(upperPendingActions)); + pendingActions = linitial_node(List, upperPendingActions); upperPendingActions = list_delete_first(upperPendingActions); } while (list_length(upperPendingNotifies) > my_level - 2) { - pendingNotifies = castNode(List, linitial(upperPendingNotifies)); + pendingNotifies = linitial_node(List, upperPendingNotifies); upperPendingNotifies = list_delete_first(upperPendingNotifies); } } |