mxactdesc.c File Reference

#include "postgres.h"
#include "access/multixact.h"

Include dependency graph for mxactdesc.c:

Go to the source code of this file.

Functions
static void	out_member (StringInfo buf, MultiXactMember *member)
void	multixact_desc (StringInfo buf, uint8 xl_info, char *rec)

---

Function Documentation

void multixact_desc	(	StringInfo	buf,
		uint8	xl_info,
		char *	rec
	)

Definition at line 50 of file mxactdesc.c.

References appendStringInfo(), i, xl_multixact_create::members, xl_multixact_create::mid, xl_multixact_create::moff, xl_multixact_create::nmembers, out_member(), XLOG_MULTIXACT_CREATE_ID, XLOG_MULTIXACT_ZERO_MEM_PAGE, and XLOG_MULTIXACT_ZERO_OFF_PAGE.

{
    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 mxid %u offset %u nmembers %d: ", xlrec->mid,
                         xlrec->moff, xlrec->nmembers);
        for (i = 0; i < xlrec->nmembers; i++)
            out_member(buf, &xlrec->members[i]);
    }
    else
        appendStringInfo(buf, "UNKNOWN");
}

static void out_member	(	StringInfo	buf,
		MultiXactMember *	member
	)			[static]

Definition at line 20 of file mxactdesc.c.

References appendStringInfo(), appendStringInfoString(), MultiXactStatusForKeyShare, MultiXactStatusForNoKeyUpdate, MultiXactStatusForShare, MultiXactStatusForUpdate, MultiXactStatusNoKeyUpdate, MultiXactStatusUpdate, MultiXactMember::status, and MultiXactMember::xid.

Referenced by multixact_desc().

{
    appendStringInfo(buf, "%u ", member->xid);
    switch (member->status)
    {
        case MultiXactStatusForKeyShare:
            appendStringInfoString(buf, "(keysh) ");
            break;
        case MultiXactStatusForShare:
            appendStringInfoString(buf, "(sh) ");
            break;
        case MultiXactStatusForNoKeyUpdate:
            appendStringInfoString(buf, "(fornokeyupd) ");
            break;
        case MultiXactStatusForUpdate:
            appendStringInfoString(buf, "(forupd) ");
            break;
        case MultiXactStatusNoKeyUpdate:
            appendStringInfoString(buf, "(nokeyupd) ");
            break;
        case MultiXactStatusUpdate:
            appendStringInfoString(buf, "(upd) ");
            break;
        default:
            appendStringInfoString(buf, "(unk) ");
            break;
    }
}