MDEV-17441 - InnoDB transition to C++11 atomics

fil_space_t::redo_skipped_count transition to Atomic_counter.

storage/innobase/fsp/fsp0fsp.cc

@@ -621,7 +621,7 @@ fsp_space_modify_check(
 	case MTR_LOG_NO_REDO:
 		ut_ad(space->purpose == FIL_TYPE_TEMPORARY
 		      || space->purpose == FIL_TYPE_IMPORT
-		      || my_atomic_loadlint(&space->redo_skipped_count));
+		      || space->redo_skipped_count);
 		return;
 	case MTR_LOG_ALL:
 		/* We may only write redo log for a persistent tablespace. */

storage/innobase/include/btr0bulk.h

@@ -286,8 +286,7 @@ class BtrBulk
 	{
 #ifdef UNIV_DEBUG
 		if (m_flush_observer)
-		my_atomic_addlint(&m_index->table->space->redo_skipped_count,
-				  1);
+			m_index->table->space->redo_skipped_count++;
 #endif /* UNIV_DEBUG */
 	}
 
@@ -296,8 +295,7 @@ class BtrBulk
 	{
 #ifdef UNIV_DEBUG
 		if (m_flush_observer)
-		my_atomic_addlint(&m_index->table->space->redo_skipped_count,
-				  ulint(-1));
+			m_index->table->space->redo_skipped_count--;
 #endif /* UNIV_DEBUG */
 	}
 

storage/innobase/include/fil0fil.h

@@ -97,11 +97,9 @@ struct fil_space_t {
 	/** whether undo tablespace truncation is in progress */
 	bool		is_being_truncated;
 #ifdef UNIV_DEBUG
-	ulint		redo_skipped_count;
-				/*!< reference count for operations who want
-				to skip redo log in the file space in order
-				to make fsp_space_modify_check pass.
-				Uses my_atomic_loadlint() and friends. */
+	/** reference count for operations who want to skip redo log in the
+	file space in order to make fsp_space_modify_check pass. */
+	Atomic_counter<ulint> redo_skipped_count;
 #endif
 	fil_type_t	purpose;/*!< purpose */
 	UT_LIST_BASE_NODE_T(fil_node_t) chain;

storage/innobase/mtr/mtr0mtr.cc

@@ -677,7 +677,7 @@ mtr_t::x_lock_space(ulint space_id, const char* file, unsigned line)
 		ut_ad(get_log_mode() != MTR_LOG_NO_REDO
 		      || space->purpose == FIL_TYPE_TEMPORARY
 		      || space->purpose == FIL_TYPE_IMPORT
-		      || my_atomic_loadlint(&space->redo_skipped_count) > 0);
+		      || space->redo_skipped_count > 0);
 	}
 
 	ut_ad(space);