initial code repo

[stor4nfv.git] / src / ceph / src / msg / async / EventSelect.cc

diff --git a/src/ceph/src/msg/async/EventSelect.cc b/src/ceph/src/msg/async/EventSelect.cc
new file mode 100644 (file)
index 0000000..fdee6eb
--- /dev/null
+++ b/src/ceph/src/msg/async/EventSelect.cc
@@ -0,0 +1,95 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2014 UnitedStack <haomai@unitedstack.com>
+ *
+ * Author: Haomai Wang <haomaiwang@gmail.com>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#include "common/errno.h"
+#include "EventSelect.h"
+
+#include <unistd.h>
+#include <sys/select.h>
+#define dout_subsys ceph_subsys_ms
+
+#undef dout_prefix
+#define dout_prefix *_dout << "SelectDriver."
+
+int SelectDriver::init(EventCenter *c, int nevent)
+{
+  ldout(cct, 0) << "Select isn't suitable for production env, just avoid "
+                << "compiling error or special purpose" << dendl;
+  FD_ZERO(&rfds);
+  FD_ZERO(&wfds);
+  max_fd = 0;
+  return 0;
+}
+
+int SelectDriver::add_event(int fd, int cur_mask, int add_mask)
+{
+  ldout(cct, 10) << __func__ << " add event to fd=" << fd << " mask=" << add_mask
+                 << dendl;
+
+  int mask = cur_mask | add_mask;
+  if (mask & EVENT_READABLE)
+    FD_SET(fd, &rfds);
+  if (mask & EVENT_WRITABLE)
+    FD_SET(fd, &wfds);
+  if (fd > max_fd)
+      max_fd = fd;
+
+  return 0;
+}
+
+int SelectDriver::del_event(int fd, int cur_mask, int delmask)
+{
+  ldout(cct, 10) << __func__ << " del event fd=" << fd << " cur mask=" << cur_mask
+                 << dendl;
+
+  if (delmask & EVENT_READABLE)
+    FD_CLR(fd, &rfds);
+  if (delmask & EVENT_WRITABLE)
+    FD_CLR(fd, &wfds);
+  return 0;
+}
+
+int SelectDriver::resize_events(int newsize)
+{
+  return 0;
+}
+
+int SelectDriver::event_wait(vector<FiredFileEvent> &fired_events, struct timeval *tvp)
+{
+  int retval, numevents = 0;
+
+  memcpy(&_rfds, &rfds, sizeof(fd_set));
+  memcpy(&_wfds, &wfds, sizeof(fd_set));
+
+  retval = select(max_fd+1, &_rfds, &_wfds, NULL, tvp);
+  if (retval > 0) {
+    for (int j = 0; j <= max_fd; j++) {
+      int mask = 0;
+      struct FiredFileEvent fe;
+      if (FD_ISSET(j, &_rfds))
+          mask |= EVENT_READABLE;
+      if (FD_ISSET(j, &_wfds))
+          mask |= EVENT_WRITABLE;
+      if (mask) {
+        fe.fd = j;
+        fe.mask = mask;
+        fired_events.push_back(fe);
+        numevents++;
+      }
+    }
+  }
+  return numevents;
+}