1 files changed, 51 insertions, 0 deletions
diff --git a/src/backend/access/rmgrdesc/mxactdesc.c b/src/backend/access/rmgrdesc/mxactdesc.c
new file mode 100644
index 00000000000..33b89f91033
--- /dev/null
+++ b/src/backend/access/rmgrdesc/mxactdesc.c
@@ -0,0 +1,51 @@
+/*-------------------------------------------------------------------------
+ *
+ * mxactdesc.c
+ *    rmgr descriptor routines for access/transam/multixact.c
+ *
+ * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ *
+ * IDENTIFICATION
+ *    src/backend/access/rmgrdesc/mxactdesc.c
+ *
+ *-------------------------------------------------------------------------
+ */
+#include "postgres.h"
+
+#include "access/multixact.h"
+
+
+void
+multixact_desc(StringInfo buf, uint8 xl_info, char *rec)
+{
+	uint8		info = xl_info & ~XLR_INFO_MASK;
+
+	if (info == XLOG_MULTIXACT_ZERO_OFF_PAGE)
+	{
+		int			pageno;
+
+		memcpy(&pageno, rec, sizeof(int));
+		appendStringInfo(buf, "zero offsets page: %d", pageno);
+	}
+	else if (info == XLOG_MULTIXACT_ZERO_MEM_PAGE)
+	{
+		int			pageno;
+
+		memcpy(&pageno, rec, sizeof(int));
+		appendStringInfo(buf, "zero members page: %d", pageno);
+	}
+	else if (info == XLOG_MULTIXACT_CREATE_ID)
+	{
+		xl_multixact_create *xlrec = (xl_multixact_create *) rec;
+		int			i;
+
+		appendStringInfo(buf, "create multixact %u offset %u:",
+						 xlrec->mid, xlrec->moff);
+		for (i = 0; i < xlrec->nxids; i++)
+			appendStringInfo(buf, " %u", xlrec->xids[i]);
+	}
+	else
+		appendStringInfo(buf, "UNKNOWN");
+}