polardbxengine/storage/ndb/include/kernel/signaldata/DictSignal.hpp

/* Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   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, version 2.0, 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 St, Fifth Floor, Boston, MA 02110-1301  USA */

#ifndef DICT_SIGNAL_HPP
#define DICT_SIGNAL_HPP

#include <Bitmask.hpp>

#define JAM_FILE_ID 187


struct DictSignal
{
  // DICT transaction and operation REQs include Uint32 requestInfo
  // implementation signals have only requestType
  // requestInfo format should be as follows

  // byte 0: requestType (usually enum)

  static Uint32
  getRequestType(const Uint32& info) {
    return BitmaskImpl::getField(1, &info, 0, 8);
  }

  static void
  setRequestType(Uint32& info, Uint32 val) {
    assert(val < (1 << 8));
    BitmaskImpl::setField(1, &info, 0, 8, val);
  }

  // byte 1: extra case-dependent usage within DICT

  static Uint32
  getRequestExtra(const Uint32& info) {
    return BitmaskImpl::getField(1, &info, 8, 8);
  }

  static void
  setRequestExtra(Uint32& info, Uint32 val) {
    assert(val < (1 << 8));
    BitmaskImpl::setField(1, &info, 8, 8, val);
  }

  static void
  addRequestExtra(Uint32& dst_info, const Uint32& src_info) {
    Uint32 val = getRequestExtra(src_info);
    setRequestExtra(dst_info, val);
  }

  // byte 2: global flags: passed everywhere
  // byte 3: local flags: consumed by current op

private:

  // flag bits are defined relative to entire requestInfo word
  enum { RequestFlagsMask = 0xffff0000 };
  enum { RequestFlagsGlobalMask = 0x00ff0000 };

public:

  enum RequestFlags {
    // global

    /*
     * This node is transaction coordinator and the only participant.
     * Used by node doing NR to activate each index.
     */
    RF_LOCAL_TRANS = (1 << 16),

    /*
     * Activate index but do not build it.  On SR, the build is done
     * in a later start phase (for non-logged index).  On NR, the build
     * on this node takes place automatically during data copy.
     */
    RF_NO_BUILD = (1 << 17)

  };

  static void
  addRequestFlags(Uint32& dst_info, const Uint32& src_info) {
    dst_info |= src_info & RequestFlagsMask;
  }

  static void
  addRequestFlagsGlobal(Uint32& dst_info, const Uint32& src_info) {
    dst_info |= src_info & RequestFlagsGlobalMask;
  }

  static const char*
  getRequestFlagsText(const Uint32& info) {
    static char buf[100];
    buf[0] = buf[1] = 0;
    if (info & RF_LOCAL_TRANS)
      strcat(buf, " LOCAL_TRANS");
    if (info & RF_NO_BUILD)
      strcat(buf, " NO_BUILD");
    return &buf[1];
  }

  static const char*
  getRequestInfoText(const Uint32& info) {
    static char buf[100];
    sprintf(buf, "type: %u extra: %u flags: %s",
        getRequestType(info), (info >> 8) & 0xff, getRequestFlagsText(info));
    return buf;
  }

  // these match Dbdict.hpp

  static const char*
  getTransModeName(Uint32 val) {
    static const char* name[] = {
      "Undef", "Normal", "Rollback", "Abort"
    };
    Uint32 size = sizeof(name)/sizeof(name[0]);
    return val < size ? name[val] : "?";
  }

  static const char*
  getTransPhaseName(Uint32 val) {
    static const char* name[] = {
      "Undef", "Begin", "Parse", "Prepare", "Commit", "Complete", "End"
    };
    Uint32 size = sizeof(name)/sizeof(name[0]);
    return val < size ? name[val] : "?";
  }

  static const char*
  getTransStateName(Uint32 val) {
    static const char* name[] = {
      "Undef", "Ok", "Error", "NodeFail", "NeedTrans", "NoTrans", "NeedOp", "NoOp"
    };
    Uint32 size = sizeof(name)/sizeof(name[0]);
    return val < size ? name[val] : "?";
  }
};


#undef JAM_FILE_ID

#endif