Convert macros to static inline functions (block.h)

Remove BlockIdIsValid(), which wasn't used and is unnecessary.

Remove BlockIdCopy(), which wasn't used and can be done by struct
assignment.

(BlockIdEquals() also isn't used, but seems reasonable to keep
around.)

Reviewed-by: Amul Sul <sulamul@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/5b558da8-99fb-0a99-83dd-f72f05388517%40enterprisedb.com

Author: petere

src/include/storage/block.h

@@ -59,57 +59,50 @@ typedef struct BlockIdData
 typedef BlockIdData *BlockId;	/* block identifier */
 
 /* ----------------
- *		support macros
+ *		support functions
  * ----------------
  */
 
 /*
  * BlockNumberIsValid
  *		True iff blockNumber is valid.
  */
-#define BlockNumberIsValid(blockNumber) \
-	((BlockNumber) (blockNumber) != InvalidBlockNumber)
-
-/*
- * BlockIdIsValid
- *		True iff the block identifier is valid.
- */
-#define BlockIdIsValid(blockId) \
-	PointerIsValid(blockId)
+static inline bool
+BlockNumberIsValid(BlockNumber blockNumber)
+{
+	return blockNumber != InvalidBlockNumber;
+}
 
 /*
  * BlockIdSet
  *		Sets a block identifier to the specified value.
  */
-#define BlockIdSet(blockId, blockNumber) \
-( \
-	(blockId)->bi_hi = (blockNumber) >> 16, \
-	(blockId)->bi_lo = (blockNumber) & 0xffff \
-)
-
-/*
- * BlockIdCopy
- *		Copy a block identifier.
- */
-#define BlockIdCopy(toBlockId, fromBlockId) \
-( \
-	(toBlockId)->bi_hi = (fromBlockId)->bi_hi, \
-	(toBlockId)->bi_lo = (fromBlockId)->bi_lo \
-)
+static inline void
+BlockIdSet(BlockIdData *blockId, BlockNumber blockNumber)
+{
+	blockId->bi_hi = blockNumber >> 16;
+	blockId->bi_lo = blockNumber & 0xffff;
+}
 
 /*
  * BlockIdEquals
  *		Check for block number equality.
  */
-#define BlockIdEquals(blockId1, blockId2) \
-	((blockId1)->bi_hi == (blockId2)->bi_hi && \
-	 (blockId1)->bi_lo == (blockId2)->bi_lo)
+static inline bool
+BlockIdEquals(const BlockIdData *blockId1, const BlockIdData *blockId2)
+{
+	return (blockId1->bi_hi == blockId2->bi_hi &&
+			blockId1->bi_lo == blockId2->bi_lo);
+}
 
 /*
  * BlockIdGetBlockNumber
  *		Retrieve the block number from a block identifier.
  */
-#define BlockIdGetBlockNumber(blockId) \
-	((((BlockNumber) (blockId)->bi_hi) << 16) | ((BlockNumber) (blockId)->bi_lo))
+static inline BlockNumber
+BlockIdGetBlockNumber(const BlockIdData *blockId)
+{
+	return (((BlockNumber) blockId->bi_hi) << 16) | ((BlockNumber) blockId->bi_lo);
+}
 
 #endif							/* BLOCK_H */