From a175314c3e5827eb193872241446f2f8f5c9d33c Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 4 May 2024 20:07:14 +0200
Subject: Adding upstream version 1:10.5.12.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 sql/threadpool_generic.h | 156 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 156 insertions(+)
 create mode 100644 sql/threadpool_generic.h

(limited to 'sql/threadpool_generic.h')

diff --git a/sql/threadpool_generic.h b/sql/threadpool_generic.h
new file mode 100644
index 00000000..acf5ec69
--- /dev/null
+++ b/sql/threadpool_generic.h
@@ -0,0 +1,156 @@
+/* Copyright(C) 2019, 2020, MariaDB
+ *
+ * This program is free software; you can redistribute itand /or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111 - 1301 USA*/
+
+#if defined (HAVE_POOL_OF_THREADS)
+#include <my_global.h>
+#include <sql_plist.h>
+#include <my_pthread.h>
+#include <mysqld.h>
+#include <threadpool.h>
+#include <violite.h>
+
+#ifdef _WIN32
+#include <windows.h>
+/* AIX may define this, too ?*/
+#define HAVE_IOCP
+#endif
+
+
+#ifdef _WIN32
+typedef HANDLE TP_file_handle;
+#else
+typedef int TP_file_handle;
+#define  INVALID_HANDLE_VALUE -1
+#endif
+
+#ifdef __linux__
+#include <sys/epoll.h>
+typedef struct epoll_event native_event;
+#elif defined(HAVE_KQUEUE)
+#include <sys/event.h>
+typedef struct kevent native_event;
+#elif defined (__sun)
+#include <port.h>
+typedef port_event_t native_event;
+#elif defined (HAVE_IOCP)
+typedef OVERLAPPED_ENTRY native_event;
+#else
+#error threadpool is not available on this platform
+#endif
+
+struct thread_group_t;
+
+/* Per-thread structure for workers */
+struct worker_thread_t
+{
+  ulonglong  event_count; /* number of request handled by this thread */
+  thread_group_t* thread_group;
+  worker_thread_t* next_in_list;
+  worker_thread_t** prev_in_list;
+  mysql_cond_t  cond;
+  bool          woken;
+};
+
+typedef I_P_List<worker_thread_t, I_P_List_adapter<worker_thread_t,
+  & worker_thread_t::next_in_list,
+  & worker_thread_t::prev_in_list>,
+  I_P_List_counter
+>
+worker_list_t;
+
+struct TP_connection_generic :public TP_connection
+{
+  TP_connection_generic(CONNECT* c);
+  ~TP_connection_generic();
+
+  virtual int init() { return 0; };
+  virtual void set_io_timeout(int sec);
+  virtual int  start_io();
+  virtual void wait_begin(int type);
+  virtual void wait_end();
+
+  thread_group_t* thread_group;
+  TP_connection_generic* next_in_queue;
+  TP_connection_generic** prev_in_queue;
+  ulonglong abs_wait_timeout;
+  ulonglong enqueue_time;
+  TP_file_handle fd;
+  bool bound_to_poll_descriptor;
+  int waiting;
+  bool fix_group;
+#ifdef HAVE_IOCP
+  OVERLAPPED overlapped;
+#endif
+#ifdef _WIN32
+  enum_vio_type vio_type;
+#endif
+};
+
+
+typedef I_P_List<TP_connection_generic,
+  I_P_List_adapter<TP_connection_generic,
+  & TP_connection_generic::next_in_queue,
+  & TP_connection_generic::prev_in_queue>,
+  I_P_List_counter,
+  I_P_List_fast_push_back<TP_connection_generic> >
+  connection_queue_t;
+
+const int NQUEUES = 2; /* We have high and low priority queues*/
+
+enum class operation_origin
+{
+  WORKER,
+  LISTENER
+};
+
+struct thread_group_counters_t
+{
+  ulonglong thread_creations;
+  ulonglong thread_creations_due_to_stall;
+  ulonglong wakes;
+  ulonglong wakes_due_to_stall;
+  ulonglong throttles;
+  ulonglong stalls;
+  ulonglong dequeues[2];
+  ulonglong polls[2];
+};
+
+struct thread_group_t
+{
+  mysql_mutex_t mutex;
+  connection_queue_t queues[NQUEUES];
+  worker_list_t waiting_threads;
+  worker_thread_t* listener;
+  pthread_attr_t* pthread_attr;
+  TP_file_handle  pollfd;
+  int  thread_count;
+  int  active_thread_count;
+  int  connection_count;
+  /* Stats for the deadlock detection timer routine.*/
+  int io_event_count;
+  int queue_event_count;
+  ulonglong last_thread_creation_time;
+  int  shutdown_pipe[2];
+  bool shutdown;
+  bool stalled;
+  thread_group_counters_t counters;
+  char pad[CPU_LEVEL1_DCACHE_LINESIZE];
+};
+
+#define TP_INCREMENT_GROUP_COUNTER(group,var) do {group->counters.var++;}while(0)
+
+extern thread_group_t* all_groups;
+#endif
+
-- 
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