Replace most StaticAssertStmt() with StaticAssertDecl()

Similar to commit 75f49221c2, it is preferable to use
StaticAssertDecl() instead of StaticAssertStmt() when possible.

Discussion: https://www.postgresql.org/message-id/flat/CA%2BhUKGKvr0x_oGmQTUkx%3DODgSksT2EtgCA6LmGx_jQFG%3DsDUpg%40mail.gmail.com

src/backend/access/heap/vacuumlazy.c

@@ -3388,6 +3388,9 @@ lazy_truncate_heap(LVRelState *vacrel)
 static BlockNumber
 count_nondeletable_pages(LVRelState *vacrel, bool *lock_waiter_detected)
 {
+	StaticAssertDecl((PREFETCH_SIZE & (PREFETCH_SIZE - 1)) == 0,
+					 "prefetch size must be power of 2");
+
 	BlockNumber blkno;
 	BlockNumber prefetchedUntil;
 	instr_time	starttime;
@@ -3402,8 +3405,6 @@ count_nondeletable_pages(LVRelState *vacrel, bool *lock_waiter_detected)
 	 * in forward direction, so that OS-level readahead can kick in.
 	 */
 	blkno = vacrel->rel_pages;
-	StaticAssertStmt((PREFETCH_SIZE & (PREFETCH_SIZE - 1)) == 0,
-					 "prefetch size must be power of 2");
 	prefetchedUntil = InvalidBlockNumber;
 	while (blkno > vacrel->nonempty_pages)
 	{

src/backend/access/table/tableam.c

@@ -462,15 +462,15 @@ table_block_parallelscan_startblock_init(Relation rel,
 										 BlockNumber startblock,
 										 BlockNumber numblocks)
 {
+	StaticAssertDecl(MaxBlockNumber <= 0xFFFFFFFE,
+					 "pg_nextpower2_32 may be too small for non-standard BlockNumber width");
+
 	BlockNumber sync_startpage = InvalidBlockNumber;
 	BlockNumber scan_nblocks;
 
 	/* Reset the state we use for controlling allocation size. */
 	memset(pbscanwork, 0, sizeof(*pbscanwork));
 
-	StaticAssertStmt(MaxBlockNumber <= 0xFFFFFFFE,
-					 "pg_nextpower2_32 may be too small for non-standard BlockNumber width");
-
 retry:
 	/* Grab the spinlock. */
 	SpinLockAcquire(&pbscan->phs_mutex);

src/backend/access/transam/parallel.c

@@ -266,6 +266,10 @@ InitializeParallelDSM(ParallelContext *pcxt)
 
 	if (pcxt->nworkers > 0)
 	{
+		StaticAssertDecl(BUFFERALIGN(PARALLEL_ERROR_QUEUE_SIZE) ==
+						 PARALLEL_ERROR_QUEUE_SIZE,
+						 "parallel error queue size not buffer-aligned");
+
 		/* Estimate space for various kinds of state sharing. */
 		library_len = EstimateLibraryStateSpace();
 		shm_toc_estimate_chunk(&pcxt->estimator, library_len);
@@ -297,9 +301,6 @@ InitializeParallelDSM(ParallelContext *pcxt)
 		shm_toc_estimate_keys(&pcxt->estimator, 12);
 
 		/* Estimate space need for error queues. */
-		StaticAssertStmt(BUFFERALIGN(PARALLEL_ERROR_QUEUE_SIZE) ==
-						 PARALLEL_ERROR_QUEUE_SIZE,
-						 "parallel error queue size not buffer-aligned");
 		shm_toc_estimate_chunk(&pcxt->estimator,
 							   mul_size(PARALLEL_ERROR_QUEUE_SIZE,
 										pcxt->nworkers));

src/backend/storage/buffer/bufmgr.c

@@ -7149,9 +7149,9 @@ buffer_readv_encode_error(PgAioResult *result,
 		error_count > 0 ? error_count : zeroed_count;
 	uint8		first_off;
 
-	StaticAssertStmt(PG_IOV_MAX <= 1 << READV_COUNT_BITS,
+	StaticAssertDecl(PG_IOV_MAX <= 1 << READV_COUNT_BITS,
 					 "PG_IOV_MAX is bigger than reserved space for error data");
-	StaticAssertStmt((1 + 1 + 3 * READV_COUNT_BITS) <= PGAIO_RESULT_ERROR_BITS,
+	StaticAssertDecl((1 + 1 + 3 * READV_COUNT_BITS) <= PGAIO_RESULT_ERROR_BITS,
 					 "PGAIO_RESULT_ERROR_BITS is insufficient for buffer_readv");
 
 	/*

src/backend/storage/file/fd.c

@@ -1111,23 +1111,6 @@ BasicOpenFilePerm(const char *fileName, int fileFlags, mode_t fileMode)
 
 tryAgain:
 #ifdef PG_O_DIRECT_USE_F_NOCACHE
-
-	/*
-	 * The value we defined to stand in for O_DIRECT when simulating it with
-	 * F_NOCACHE had better not collide with any of the standard flags.
-	 */
-	StaticAssertStmt((PG_O_DIRECT &
-					  (O_APPEND |
-					   O_CLOEXEC |
-					   O_CREAT |
-					   O_DSYNC |
-					   O_EXCL |
-					   O_RDWR |
-					   O_RDONLY |
-					   O_SYNC |
-					   O_TRUNC |
-					   O_WRONLY)) == 0,
-					 "PG_O_DIRECT value collides with standard flag");
 	fd = open(fileName, fileFlags & ~PG_O_DIRECT, fileMode);
 #else
 	fd = open(fileName, fileFlags, fileMode);

src/backend/storage/ipc/waiteventset.c

@@ -462,7 +462,6 @@ CreateWaitEventSet(ResourceOwner resowner, int nevents)
 	 * pending signals are serviced.
 	 */
 	set->handles[0] = pgwin32_signal_event;
-	StaticAssertStmt(WSA_INVALID_EVENT == NULL, "");
 #endif
 
 	return set;
@@ -979,6 +978,8 @@ WaitEventAdjustKqueue(WaitEventSet *set, WaitEvent *event, int old_events)
 #endif
 
 #if defined(WAIT_USE_WIN32)
+StaticAssertDecl(WSA_INVALID_EVENT == NULL, "");
+
 static void
 WaitEventAdjustWin32(WaitEventSet *set, WaitEvent *event)
 {

src/backend/utils/adt/mac.c

@@ -485,7 +485,7 @@ macaddr_abbrev_convert(Datum original, SortSupport ssup)
 	 * There will be two bytes of zero padding on the end of the least
 	 * significant bits.
 	 */
-	StaticAssertStmt(sizeof(res) >= sizeof(macaddr),
+	StaticAssertDecl(sizeof(res) >= sizeof(macaddr),
 					 "Datum is too small for macaddr");
 	memset(&res, 0, sizeof(res));
 	memcpy(&res, authoritative, sizeof(macaddr));

src/backend/utils/cache/inval.c

@@ -1753,7 +1753,7 @@ CacheInvalidateSmgr(RelFileLocatorBackend rlocator)
 	SharedInvalidationMessage msg;
 
 	/* verify optimization stated above stays valid */
-	StaticAssertStmt(MAX_BACKENDS_BITS <= 23,
+	StaticAssertDecl(MAX_BACKENDS_BITS <= 23,
 					 "MAX_BACKENDS_BITS is too big for inval.c");
 
 	msg.sm.id = SHAREDINVALSMGR_ID;

src/include/storage/fd.h

@@ -92,6 +92,22 @@ extern PGDLLIMPORT int max_safe_fds;
 #elif defined(F_NOCACHE)
 #define		PG_O_DIRECT 0x80000000
 #define		PG_O_DIRECT_USE_F_NOCACHE
+/*
+ * The value we defined to stand in for O_DIRECT when simulating it with
+ * F_NOCACHE had better not collide with any of the standard flags.
+ */
+StaticAssertDecl((PG_O_DIRECT &
+				  (O_APPEND |
+				   O_CLOEXEC |
+				   O_CREAT |
+				   O_DSYNC |
+				   O_EXCL |
+				   O_RDWR |
+				   O_RDONLY |
+				   O_SYNC |
+				   O_TRUNC |
+				   O_WRONLY)) == 0,
+				 "PG_O_DIRECT value collides with standard flag");
 #else
 #define		PG_O_DIRECT 0
 #endif