index a4e732a3f547811b182d09022bb034c5400ce621..675affe4f766696181d4053b3f9b0f524e23ddd6 100644 (file)
/* We need four bytes per offset */
#define MULTIXACT_OFFSETS_PER_PAGE (BLCKSZ / sizeof(MultiXactOffset))
-#define MultiXactIdToOffsetPage(xid) \
- ((xid) / (MultiXactOffset) MULTIXACT_OFFSETS_PER_PAGE)
-#define MultiXactIdToOffsetEntry(xid) \
- ((xid) % (MultiXactOffset) MULTIXACT_OFFSETS_PER_PAGE)
-#define MultiXactIdToOffsetSegment(xid) (MultiXactIdToOffsetPage(xid) / SLRU_PAGES_PER_SEGMENT)
+static inline int64
+MultiXactIdToOffsetPage(MultiXactId multi)
+{
+ return multi / MULTIXACT_OFFSETS_PER_PAGE;
+}
+
+static inline int
+MultiXactIdToOffsetEntry(MultiXactId multi)
+{
+ return multi % MULTIXACT_OFFSETS_PER_PAGE;
+}
+
+static inline int
+MultiXactIdToOffsetSegment(MultiXactId multi)
+{
+ return MultiXactIdToOffsetPage(multi) / SLRU_PAGES_PER_SEGMENT;
+}
/*
* The situation for members is a bit more complex: we store one byte of
((uint32) ((0xFFFFFFFF % MULTIXACT_MEMBERS_PER_PAGE) + 1))
/* page in which a member is to be found */
-#define MXOffsetToMemberPage(xid) ((xid) / (TransactionId) MULTIXACT_MEMBERS_PER_PAGE)
-#define MXOffsetToMemberSegment(xid) (MXOffsetToMemberPage(xid) / SLRU_PAGES_PER_SEGMENT)
+static inline int64
+MXOffsetToMemberPage(MultiXactOffset offset)
+{
+ return offset / MULTIXACT_MEMBERS_PER_PAGE;
+}
+
+static inline int
+MXOffsetToMemberSegment(MultiXactOffset offset)
+{
+ return MXOffsetToMemberPage(offset) / SLRU_PAGES_PER_SEGMENT;
+}
/* Location (byte offset within page) of flag word for a given member */
-#define MXOffsetToFlagsOffset(xid) \
- ((((xid) / (TransactionId) MULTIXACT_MEMBERS_PER_MEMBERGROUP) % \
- (TransactionId) MULTIXACT_MEMBERGROUPS_PER_PAGE) * \
- (TransactionId) MULTIXACT_MEMBERGROUP_SIZE)
-#define MXOffsetToFlagsBitShift(xid) \
- (((xid) % (TransactionId) MULTIXACT_MEMBERS_PER_MEMBERGROUP) * \
- MXACT_MEMBER_BITS_PER_XACT)
+static inline int
+MXOffsetToFlagsOffset(MultiXactOffset offset)
+{
+ MultiXactOffset group = offset / MULTIXACT_MEMBERS_PER_MEMBERGROUP;
+ int grouponpg = group % MULTIXACT_MEMBERGROUPS_PER_PAGE;
+ int byteoff = grouponpg * MULTIXACT_MEMBERGROUP_SIZE;
+
+ return byteoff;
+}
+
+static inline int
+MXOffsetToFlagsBitShift(MultiXactOffset offset)
+{
+ int member_in_group = offset % MULTIXACT_MEMBERS_PER_MEMBERGROUP;
+ int bshift = member_in_group * MXACT_MEMBER_BITS_PER_XACT;
+
+ return bshift;
+}
/* Location (byte offset within page) of TransactionId of given member */
-#define MXOffsetToMemberOffset(xid) \
- (MXOffsetToFlagsOffset(xid) + MULTIXACT_FLAGBYTES_PER_GROUP + \
- ((xid) % MULTIXACT_MEMBERS_PER_MEMBERGROUP) * sizeof(TransactionId))
+static inline int
+MXOffsetToMemberOffset(MultiXactOffset offset)
+{
+ int member_in_group = offset % MULTIXACT_MEMBERS_PER_MEMBERGROUP;
+
+ return MXOffsetToFlagsOffset(offset) +
+ MULTIXACT_FLAGBYTES_PER_GROUP +
+ member_in_group * sizeof(TransactionId);
+}
/* Multixact members wraparound thresholds. */
#define MULTIXACT_MEMBER_SAFE_THRESHOLD (MaxMultiXactOffset / 2)
#define MULTIXACT_MEMBER_DANGER_THRESHOLD \
(MaxMultiXactOffset - MaxMultiXactOffset / 4)
-#define PreviousMultiXactId(xid) \
- ((xid) == FirstMultiXactId ? MaxMultiXactId : (xid) - 1)
+static inline MultiXactId
+PreviousMultiXactId(MultiXactId multi)
+{
+ return multi == FirstMultiXactId ? MaxMultiXactId : multi - 1;
+}
/*
* Links to shared-memory data structures for MultiXact control