text: /* -*- Mode: C; tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*- */
  /*
   *     Copyright 2014-2019 Couchbase, Inc.
   *
   *   Licensed under the Apache License, Version 2.0 (the "License");
   *   you may not use this file except in compliance with the License.
   *   You may obtain a copy of the License at
   *
   *       http://www.apache.org/licenses/LICENSE-2.0
   *
   *   Unless required by applicable law or agreed to in writing, software
   *   distributed under the License is distributed on an "AS IS" BASIS,
   *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *   See the License for the specific language governing permissions and
   *   limitations under the License.
   */
  
  #ifndef LCB_IOTABLE_H
  #define LCB_IOTABLE_H
  
  #include <libcouchbase/couchbase.h>
  
  /**
   * @file
   * @brief Internal I/O Table routines
   *
   * @details
   * Include this file if you are actually manipulating the I/O system (i.e.
   * creating timers, starting/stoping loops, or writing to/from a socket).
   *
   * This file defines the iotable layout as well as various macros associated
   * with its use. The actual "Public" API (i.e. just for passing it around) can
   * be found in <lcbio/connect.h>
   */
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /** Whether the underlying model is event-based */
  #define IOT_IS_EVENT(iot) ((iot)->model == LCB_IOMODEL_EVENT)
  
  /** Returns an lcb_ev_procs structure for event-based I/O */
  #define IOT_V0EV(iot) (iot)->u_io.v0.ev
  
  /** Returns an lcb_bsd_procs structure for event-based I/O */
  #define IOT_V0IO(iot) (iot)->u_io.v0.io
  
  /** Returns an lcb_completion_procs structure for completion-based I/O */
  #define IOT_V1(iot) (iot)->u_io.completion
  
  /** Error code of last I/O operation */
  #define IOT_ERRNO(iot) (iot)->p->v.v0.error
  
  /** Start the loop */
  #define IOT_START(iot) (iot)->loop.start((iot)->p)
  
  /** Stop the loop */
  #define IOT_STOP(iot) (iot)->loop.stop((iot)->p)
  
  /** First argument to IO Table */
  #define IOT_ARG(iot) (iot)->p
  
  typedef struct lcbio_TABLE {
      lcb_io_opt_t p;
      lcb_iomodel_t model;
      lcb_timer_procs timer;
      lcb_loop_procs loop;
  
      union {
          struct {
              lcb_ev_procs ev;
              lcb_bsd_procs io;
          } v0;
          lcb_completion_procs completion;
      } u_io;
      unsigned refcount;
      void (*dtor)(void *);
  
  #ifdef __cplusplus
      bool is_E() const
      {
          return IOT_IS_EVENT(this);
      }
      bool is_C() const
      {
          return !is_E();
      }
      int get_errno() const
      {
          return IOT_ERRNO(this);
      }
  
      void run_loop()
      {
          IOT_START(this);
      }
      void stop_loop()
      {
          IOT_STOP(this);
      }
  
      int E_connect(lcb_socket_t sock, const sockaddr *saddr, unsigned addrlen)
      {
          return IOT_V0IO(this).connect0(p, sock, saddr, addrlen);
      }
  
      lcb_socket_t E_socket(int domain, int type, int protocol)
      {
          return IOT_V0IO(this).socket0(p, domain, type, protocol);
      }
  
      lcb_socket_t E_socket(const addrinfo *ai)
      {
          return E_socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
      }
  
      void E_close(lcb_socket_t sock)
      {
          IOT_V0IO(this).close(p, sock);
      }
  
      void *E_event_create()
      {
          return IOT_V0EV(this).create(p);
      }
  
      void E_event_watch(lcb_socket_t fd, void *event, short mask, void *arg, lcb_ioE_callback cb)
      {
          IOT_V0EV(this).watch(p, fd, event, mask, arg, cb);
      }
  
      void E_event_destroy(void *event)
      {
          IOT_V0EV(this).destroy(p, event);
      }
  
      void E_event_cancel(lcb_socket_t fd, void *event)
      {
          IOT_V0EV(this).cancel(p, fd, event);
      }
  
      int E_check_closed(lcb_socket_t s, int flags)
      {
          return IOT_V0IO(this).is_closed(p, s, flags);
      }
  
      int E_cntl(lcb_socket_t s, int mode, int opt, void *val)
      {
          return IOT_V0IO(this).cntl(p, s, mode, opt, val);
      }
  
      void C_close(lcb_sockdata_t *sd)
      {
          IOT_V1(this).close(p, sd);
      }
  
      int C_connect(lcb_sockdata_t *sd, const sockaddr *addr, unsigned addrlen, lcb_io_connect_cb callback)
      {
          return IOT_V1(this).connect(p, sd, addr, addrlen, callback);
      }
  
      lcb_sockdata_t *C_socket(int domain, int type, int protocol)
      {
          return IOT_V1(this).socket(p, domain, type, protocol);
      }
  
      lcb_sockdata_t *C_socket(const addrinfo *ai)
      {
          return C_socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
      }
  
      int C_check_closed(lcb_sockdata_t *sock, int flags)
      {
          return IOT_V1(this).is_closed(p, sock, flags);
      }
  
      int C_cntl(lcb_sockdata_t *sd, int mode, int opt, void *val)
      {
          return IOT_V1(this).cntl(p, sd, mode, opt, val) == 0;
      }
  
      bool has_cntl()
      {
          if (is_E()) {
              return IOT_V0IO(this).cntl != NULL;
          } else {
              return IOT_V1(this).cntl != NULL;
          }
      }
  #endif
  
  } lcbio_TABLE;
  
  #ifdef __cplusplus
  }
  #endif
  #endif
  