Simplifications of server interface to scheduler

include/mysql/thread_pool_priv.h

@@ -34,11 +34,27 @@
 */
 #define MYSQL_SERVER 1
 #include <sql_class.h>
-#include <scheduler.h>
 #include <debug_sync.h>
 #include <sql_profile.h>
 #include <table.h>
 
+struct scheduler_functions
+{
+  uint max_threads;
+  bool (*init)(void);
+  bool (*init_new_connection_thread)(void);
+  void (*add_connection)(THD *thd);
+  void (*thd_wait_begin)(THD *thd, int wait_type);
+  void (*thd_wait_end)(THD *thd);
+  void (*post_kill_notification)(THD *thd);
+  bool (*end_thread)(THD *thd, bool cache_thread);
+  void (*end)(void);
+};
+
+/* Needed to get access to scheduler variables */
+void* thd_get_scheduler(THD *thd);
+PSI_thread* thd_get_psi(THD *thd);
+
 /*
   The thread pool must be able to execute commands using the connection
   state in THD object. This is the main objective of the thread pool to

sql/scheduler.cc

@@ -160,6 +160,16 @@ thd_scheduler::~thd_scheduler()
 {
 }
 
+void* thd_get_scheduler(THD *thd)
+{
+  return thd->scheduler.data;
+}
+
+PSI_thread* thd_get_psi(THD *thd)
+{
+  return thd->scheduler.m_psi;
+}
+
 static scheduler_functions *saved_thread_scheduler;
 static uint saved_thread_handling;
 

sql/scheduler.h

@@ -72,11 +72,6 @@ enum scheduler_types
 void one_thread_per_connection_scheduler();
 void one_thread_scheduler();
 
-enum pool_command_op
-{
-  NOT_IN_USE_OP= 0, NORMAL_OP= 1, CONNECT_OP, KILL_OP, DIE_OP
-};
-
 /*
  To be used for pool-of-threads (implemeneted differently on various OSs)
 */
@@ -101,6 +96,9 @@ public:
   ~thd_scheduler();
 };
 
+void *thd_get_scheduler(THD *thd);
+PSI_thread* thd_get_psi(THD *thd);
+
 extern scheduler_functions *thread_scheduler;
 
 #endif