cleanup: os_thread_yield() -> std::this_thread::yield()

storage/innobase/btr/btr0sea.cc

@@ -2171,7 +2171,7 @@ btr_search_hash_table_validate(ulint hash_table_id)
 			mysql_mutex_unlock(&buf_pool.mutex);
 			btr_search_x_unlock_all();
 
-			os_thread_yield();
+			std::this_thread::yield();
 
 			btr_search_x_lock_all();
 
@@ -2279,7 +2279,7 @@ btr_search_hash_table_validate(ulint hash_table_id)
 			mysql_mutex_unlock(&buf_pool.mutex);
 			btr_search_x_unlock_all();
 
-			os_thread_yield();
+			std::this_thread::yield();
 
 			btr_search_x_lock_all();
 

storage/innobase/buf/buf0buf.cc

@@ -288,7 +288,7 @@ void page_hash_latch::read_lock_wait()
   }
   /* Fall back to yielding to other threads. */
   do
-    os_thread_yield();
+    std::this_thread::yield();
   while (!read_trylock());
 }
 
@@ -306,7 +306,7 @@ void page_hash_latch::write_lock_wait()
 
   /* Fall back to yielding to other threads. */
   do
-    os_thread_yield();
+    std::this_thread::yield();
   while (!write_lock_poll());
 }
 

storage/innobase/buf/buf0flu.cc

@@ -260,7 +260,7 @@ void buf_flush_remove_pages(ulint id)
       break;
 
     mysql_mutex_unlock(&buf_pool.mutex);
-    os_thread_yield();
+    std::this_thread::yield();
     mysql_mutex_lock(&buf_pool.mutex);
     buf_flush_wait_batch_end(false);
   }

storage/innobase/include/os0thread.h

@@ -60,7 +60,6 @@ extern "C"  { typedef void*	(*os_thread_func_t)(void*); }
 typedef void* (*os_posix_f_t) (void*);
 
 #define os_thread_eq(a,b) IF_WIN(a == b, pthread_equal(a, b))
-#define os_thread_yield() IF_WIN(SwitchToThread(), sched_yield())
 #define os_thread_get_curr_id() IF_WIN(GetCurrentThreadId(), pthread_self())
 
 /****************************************************************//**

storage/innobase/row/row0ftsort.cc

@@ -919,7 +919,7 @@ void fts_parallel_tokenization(
 	}
 
 	if (doc_item == NULL) {
-		os_thread_yield();
+		std::this_thread::yield();
 	}
 
 	row_merge_fts_get_next_doc_item(psort_info, &doc_item);

storage/innobase/row/row0merge.cc

@@ -1994,7 +1994,7 @@ row_merge_read_clustered_index(
 				mtr_started = false;
 
 				/* Give the waiters a chance to proceed. */
-				os_thread_yield();
+				std::this_thread::yield();
 scan_next:
 				ut_ad(!mtr_started);
 				ut_ad(!mtr.is_active());

storage/innobase/row/row0mysql.cc

@@ -4205,7 +4205,7 @@ row_rename_table_for_mysql(
 	for (retry = 0; retry < 100
 	     && table->n_foreign_key_checks_running > 0; ++retry) {
 		row_mysql_unlock_data_dictionary(trx);
-		os_thread_yield();
+		std::this_thread::yield();
 		row_mysql_lock_data_dictionary(trx);
 	}
 

storage/innobase/srv/srv0start.cc

@@ -1927,7 +1927,7 @@ void srv_shutdown_bg_undo_sources()
 		dict_stats_shutdown();
 		while (row_get_background_drop_list_len_low()) {
 			srv_inc_activity_count();
-			os_thread_yield();
+			std::this_thread::yield();
 		}
 		srv_undo_sources = false;
 	}

storage/innobase/trx/trx0purge.cc

@@ -967,7 +967,7 @@ trx_purge_choose_next_log(void)
 		trx_purge_read_undo_rec();
 	} else {
 		/* There is nothing to do yet. */
-		os_thread_yield();
+		std::this_thread::yield();
 	}
 }
 

storage/innobase/trx/trx0trx.cc

@@ -1378,7 +1378,7 @@ inline void trx_t::commit_in_memory(const mtr_t *mtr)
     }
 
     /* NOTE that we could possibly make a group commit more efficient
-    here: call os_thread_yield here to allow also other trxs to come
+    here: call std::this_thread::yield() here to allow also other trxs to come
     to commit! */
 
     /*-------------------------------------*/