Windows, generic threadpool cleanups

- get rid of casts between int and HANDLE.
- store file descriptor in TP_connection_generic to get
rid of multiple mysql_socket_getfd(c->thd->net.vio->mysql_socket))

Also support named pipes (no reason not to support, since it is easy)

sql/threadpool_generic.cc

@@ -28,11 +28,19 @@
 #endif
 
 #ifdef HAVE_IOCP
-#define OPTIONAL_IO_POLL_READ_PARAM &overlapped
+#define OPTIONAL_IO_POLL_READ_PARAM this
 #else 
 #define OPTIONAL_IO_POLL_READ_PARAM 0
 #endif
 
+#ifdef _WIN32
+typedef HANDLE TP_file_handle;
+#else
+typedef int TP_file_handle;
+#define  INVALID_HANDLE_VALUE -1
+#endif
+
+
 #include <sql_connect.h>
 #include <mysqld.h>
 #include <debug_sync.h>
@@ -59,10 +67,10 @@ typedef OVERLAPPED_ENTRY native_event;
 #pragma warning (disable : 4312)
 #endif
 
-static void io_poll_close(int fd)
+static void io_poll_close(TP_file_handle fd)
 {
 #ifdef _WIN32
-  CloseHandle((HANDLE)fd);
+  CloseHandle(fd);
 #else
   close(fd);
 #endif
@@ -151,14 +159,17 @@ struct TP_connection_generic:public TP_connection
   TP_connection_generic **prev_in_queue;
   ulonglong abs_wait_timeout;
   ulonglong dequeue_time;
+  TP_file_handle fd;
   bool bound_to_poll_descriptor;
   int waiting;
 #ifdef HAVE_IOCP
   OVERLAPPED overlapped;
 #endif
+#ifdef _WIN32
+  enum_vio_type vio_type;
+#endif
 };
 
-typedef TP_connection_generic TP_connection_generic;
 
 typedef I_P_List<TP_connection_generic,
                      I_P_List_adapter<TP_connection_generic,
@@ -177,7 +188,7 @@ struct thread_group_t
   worker_list_t waiting_threads; 
   worker_thread_t *listener;
   pthread_attr_t *pthread_attr;
-  int  pollfd;
+  TP_file_handle  pollfd;
   int  thread_count;
   int  active_thread_count;
   int  connection_count;
@@ -245,11 +256,11 @@ static void print_pool_blocked_message(bool);
  Creates an io_poll descriptor 
  On Linux: epoll_create()
  
- - io_poll_associate_fd(int poll_fd, int fd, void *data, void *opt)
+ - io_poll_associate_fd(int poll_fd, TP_file_handle fd, void *data, void *opt)
  Associate file descriptor with io poll descriptor 
  On Linux : epoll_ctl(..EPOLL_CTL_ADD))
  
- - io_poll_disassociate_fd(int pollfd, int fd)
+ - io_poll_disassociate_fd(TP_file_handle pollfd, TP_file_handle fd)
   Associate file descriptor with io poll descriptor 
   On Linux: epoll_ctl(..EPOLL_CTL_DEL)
  
@@ -259,7 +270,7 @@ static void print_pool_blocked_message(bool);
  io_poll_associate_fd() was called.
  On Linux : epoll_ctl(..EPOLL_CTL_MOD)
  
- - io_poll_wait (int pollfd, native_event *native_events, int maxevents, 
+ - io_poll_wait (TP_file_handle pollfd, native_event *native_events, int maxevents, 
    int timeout_ms)
  
  wait until one or more descriptors added with io_poll_associate_fd() 
@@ -276,13 +287,13 @@ static void print_pool_blocked_message(bool);
 /* Early 2.6 kernel did not have EPOLLRDHUP */
 #define EPOLLRDHUP 0
 #endif
-static int io_poll_create()
+static TP_file_handle io_poll_create()
 {
   return epoll_create(1);
 }
 
 
-int io_poll_associate_fd(int pollfd, int fd, void *data, void*)
+int io_poll_associate_fd(TP_file_handle pollfd, TP_file_handle fd, void *data, void*)
 {
   struct epoll_event ev;
   ev.data.u64= 0; /* Keep valgrind happy */
@@ -293,7 +304,7 @@ int io_poll_associate_fd(int pollfd, int fd, void *data, void*)
 
 
 
-int io_poll_start_read(int pollfd, int fd, void *data, void *)
+int io_poll_start_read(TP_file_handle pollfd, TP_file_handle fd, void *data, void *)
 {
   struct epoll_event ev;
   ev.data.u64= 0; /* Keep valgrind happy */
@@ -302,7 +313,7 @@ int io_poll_start_read(int pollfd, int fd, void *data, void *)
   return epoll_ctl(pollfd, EPOLL_CTL_MOD,  fd, &ev); 
 }
 
-int io_poll_disassociate_fd(int pollfd, int fd)
+int io_poll_disassociate_fd(TP_file_handle pollfd, TP_file_handle fd)
 {
   struct epoll_event ev;
   return epoll_ctl(pollfd, EPOLL_CTL_DEL,  fd, &ev);
@@ -314,7 +325,7 @@ int io_poll_disassociate_fd(int pollfd, int fd)
  NOTE - in case of EINTR, it restarts with original timeout. Since we use
  either infinite or 0 timeouts, this is not critical
 */
-int io_poll_wait(int pollfd, native_event *native_events, int maxevents, 
+int io_poll_wait(TP_file_handle pollfd, native_event *native_events, int maxevents, 
               int timeout_ms)
 {
   int ret;
@@ -347,12 +358,12 @@ static void *native_event_get_userdata(native_event *event)
 #endif
 
 
-int io_poll_create()
+TP_file_handle io_poll_create()
 {
   return kqueue();
 }
 
-int io_poll_start_read(int pollfd, int fd, void *data,void *)
+int io_poll_start_read(TP_file_handle pollfd, TP_file_handle fd, void *data,void *)
 {
   struct kevent ke;
   MY_EV_SET(&ke, fd, EVFILT_READ, EV_ADD|EV_ONESHOT, 
@@ -361,7 +372,7 @@ int io_poll_start_read(int pollfd, int fd, void *data,void *)
 }
 
 
-int io_poll_associate_fd(int pollfd, int fd, void *data,void *)
+int io_poll_associate_fd(TP_file_handle pollfd, TP_file_handle fd, void *data,void *)
 {
   struct kevent ke;
   MY_EV_SET(&ke, fd, EVFILT_READ, EV_ADD|EV_ONESHOT, 
@@ -370,7 +381,7 @@ int io_poll_associate_fd(int pollfd, int fd, void *data,void *)
 }
 
 
-int io_poll_disassociate_fd(int pollfd, int fd)
+int io_poll_disassociate_fd(TP_file_handle pollfd, TP_file_handle fd)
 {
   struct kevent ke;
   MY_EV_SET(&ke,fd, EVFILT_READ, EV_DELETE, 0, 0, 0);
@@ -378,7 +389,7 @@ int io_poll_disassociate_fd(int pollfd, int fd)
 }
 
 
-int io_poll_wait(int pollfd, struct kevent *events, int maxevents, int timeout_ms)
+int io_poll_wait(TP_file_handle pollfd, struct kevent *events, int maxevents, int timeout_ms)
 {
   struct timespec ts;
   int ret;
@@ -403,27 +414,27 @@ static void* native_event_get_userdata(native_event *event)
 
 #elif defined (__sun)
 
-static int io_poll_create()
+static TP_file_handle io_poll_create()
 {
   return port_create();
 }
 
-int io_poll_start_read(int pollfd, int fd, void *data, void *)
+int io_poll_start_read(TP_file_handle pollfd, TP_file_handle fd, void *data, void *)
 {
   return port_associate(pollfd, PORT_SOURCE_FD, fd, POLLIN, data);
 }
 
-static int io_poll_associate_fd(int pollfd, int fd, void *data, void *)
+static int io_poll_associate_fd(TP_file_handle pollfd, TP_file_handle fd, void *data, void *)
 {
   return io_poll_start_read(pollfd, fd, data, 0);
 }
 
-int io_poll_disassociate_fd(int pollfd, int fd)
+int io_poll_disassociate_fd(TP_file_handle pollfd, TP_file_handle fd)
 {
   return port_dissociate(pollfd, PORT_SOURCE_FD, fd);
 }
 
-int io_poll_wait(int pollfd, native_event *events, int maxevents, int timeout_ms)
+int io_poll_wait(TP_file_handle pollfd, native_event *events, int maxevents, int timeout_ms)
 {
   struct timespec ts;
   int ret;
@@ -451,25 +462,32 @@ static void* native_event_get_userdata(native_event *event)
 #elif defined(HAVE_IOCP)
 
 
-static int io_poll_create()
+static TP_file_handle io_poll_create()
 {
-  HANDLE h= CreateIoCompletionPort(INVALID_HANDLE_VALUE, 0, 0, 0);
-  return PtrToInt(h);
+  return CreateIoCompletionPort(INVALID_HANDLE_VALUE, 0, 0, 0);
 }
 
 
-int io_poll_start_read(int pollfd, int fd, void *, void *opt)
+int io_poll_start_read(TP_file_handle pollfd, TP_file_handle fd, void *, void *opt)
 {
-  DWORD num_bytes = 0;
   static char c;
+  TP_connection_generic *con= (TP_connection_generic *)opt;
+  OVERLAPPED *overlapped= &con->overlapped;
+  if (con->vio_type == VIO_TYPE_NAMEDPIPE)
+  {
+    if (ReadFile(fd, &c, 0, NULL, overlapped))
+      return 0;
+  }
+  else
+  {
+    WSABUF buf;
+    buf.buf= &c;
+    buf.len= 0;
+    DWORD flags=0;
 
-  WSABUF buf;
-  buf.buf= &c;
-  buf.len= 0;
-  DWORD flags=0;
-  
-  if (WSARecv((SOCKET)fd, &buf, 1, &num_bytes, &flags, (OVERLAPPED *)opt, NULL) == 0)
-    return 0;
+    if (WSARecv((SOCKET)fd, &buf, 1,NULL, &flags,overlapped, NULL) == 0)
+      return 0;
+  }
 
   if (GetLastError() == ERROR_IO_PENDING)
     return 0;
@@ -478,26 +496,26 @@ int io_poll_start_read(int pollfd, int fd, void *, void *opt)
 }
 
 
-static int io_poll_associate_fd(int pollfd, int fd, void *data, void *opt)
+static int io_poll_associate_fd(TP_file_handle pollfd, TP_file_handle fd, void *data, void *opt)
 {
-  HANDLE h= CreateIoCompletionPort(IntToPtr(fd), IntToPtr(pollfd), (ULONG_PTR)data, 0);
+  HANDLE h= CreateIoCompletionPort(fd, pollfd, (ULONG_PTR)data, 0);
   if (!h) 
     return -1;
   return io_poll_start_read(pollfd,fd, 0, opt); 
 }
 
 
-int io_poll_disassociate_fd(int pollfd, int fd)
+int io_poll_disassociate_fd(TP_file_handle pollfd, TP_file_handle fd)
 {
   /* Not possible to unbind/rebind file descriptor in IOCP. */
   return 0;
 }
 
 
-int io_poll_wait(int pollfd, native_event *events, int maxevents, int timeout_ms)
+int io_poll_wait(TP_file_handle pollfd, native_event *events, int maxevents, int timeout_ms)
 {
   ULONG n;
-  BOOL ok = GetQueuedCompletionStatusEx((HANDLE)pollfd, events, 
+  BOOL ok = GetQueuedCompletionStatusEx(pollfd, events, 
      maxevents, &n, timeout_ms, FALSE);
  
   return ok ? (int)n : -1;
@@ -1038,7 +1056,7 @@ int thread_group_init(thread_group_t *thread_group, pthread_attr_t* thread_attr)
   DBUG_ENTER("thread_group_init");
   thread_group->pthread_attr = thread_attr;
   mysql_mutex_init(key_group_mutex, &thread_group->mutex, NULL);
-  thread_group->pollfd= -1;
+  thread_group->pollfd= INVALID_HANDLE_VALUE;
   thread_group->shutdown_pipe[0]= -1;
   thread_group->shutdown_pipe[1]= -1;
   queue_init(thread_group);
@@ -1049,10 +1067,10 @@ int thread_group_init(thread_group_t *thread_group, pthread_attr_t* thread_attr)
 void thread_group_destroy(thread_group_t *thread_group)
 {
   mysql_mutex_destroy(&thread_group->mutex);
-  if (thread_group->pollfd != -1)
+  if (thread_group->pollfd != INVALID_HANDLE_VALUE)
   {
     io_poll_close(thread_group->pollfd);
-    thread_group->pollfd= -1;
+    thread_group->pollfd= INVALID_HANDLE_VALUE;
   }
 #ifndef HAVE_IOCP
   for(int i=0; i < 2; i++)
@@ -1109,7 +1127,7 @@ static int wake_listener(thread_group_t *thread_group)
   if (write(thread_group->shutdown_pipe[1], &c, 1) < 0)
     return -1;
 #else
-  PostQueuedCompletionStatus((HANDLE)thread_group->pollfd, 0, 0, 0);
+  PostQueuedCompletionStatus(thread_group->pollfd, 0, 0, 0);
 #endif
   return 0;
 }
@@ -1432,6 +1450,16 @@ TP_connection_generic::TP_connection_generic(CONNECT *c):
 , overlapped()
 #endif
 {
+  DBUG_ASSERT(c->vio);
+
+#ifdef _WIN32
+  vio_type= c->vio->type;
+  fd= (vio_type == VIO_TYPE_NAMEDPIPE) ?
+    c->vio->hPipe: (TP_file_handle)mysql_socket_getfd(c->vio->mysql_socket);
+#else
+  fd= mysql_socket_getfd(c->vio->mysql_socket);
+#endif
+
   /* Assign connection to a group. */
   thread_group_t *group=
     &all_groups[c->thread_id%group_count];
@@ -1486,7 +1514,6 @@ static int change_group(TP_connection_generic *c,
  thread_group_t *new_group)
 { 
   int ret= 0;
-  int fd= (int)mysql_socket_getfd(c->thd->net.vio->mysql_socket);
 
   DBUG_ASSERT(c->thread_group == old_group);
 
@@ -1494,7 +1521,7 @@ static int change_group(TP_connection_generic *c,
   mysql_mutex_lock(&old_group->mutex);
   if (c->bound_to_poll_descriptor)
   {
-    io_poll_disassociate_fd(old_group->pollfd,fd);
+    io_poll_disassociate_fd(old_group->pollfd,c->fd);
     c->bound_to_poll_descriptor= false;
   }
   c->thread_group->connection_count--;
@@ -1513,9 +1540,7 @@ static int change_group(TP_connection_generic *c,
 
 
 int TP_connection_generic::start_io()
-{ 
-  int fd= (int)mysql_socket_getfd(thd->net.vio->mysql_socket);
-
+{
 #ifndef HAVE_IOCP
   /*
     Usually, connection will stay in the same group for the entire
@@ -1666,10 +1691,10 @@ int TP_pool_generic::set_pool_size(uint size)
   {
     thread_group_t *group= &all_groups[i];
     mysql_mutex_lock(&group->mutex);
-    if (group->pollfd == -1)
+    if (group->pollfd == INVALID_HANDLE_VALUE)
     {
       group->pollfd= io_poll_create();
-      success= (group->pollfd >= 0);
+      success= (group->pollfd != INVALID_HANDLE_VALUE);
       if(!success)
       {
         sql_print_error("io_poll_create() failed, errno=%d\n", errno);
@@ -1707,7 +1732,7 @@ int TP_pool_generic::set_stall_limit(uint limit)
 int TP_pool_generic::get_idle_thread_count()
 {
   int sum=0;
-  for (uint i= 0; i < threadpool_max_size && all_groups[i].pollfd >= 0; i++)
+  for (uint i= 0; i < threadpool_max_size && all_groups[i].pollfd != INVALID_HANDLE_VALUE; i++)
   {
     sum+= (all_groups[i].thread_count - all_groups[i].active_thread_count);
   }