Line data    Source code

       1             : /*
       2             :  * Copyright (c) 2013 Juniper Networks, Inc. All rights reserved.
       3             :  */
       4             : 
       5             : #include "db/db_entry.h"
       6             : 
       7             : #include <tbb/mutex.h>
       8             : 
       9             : #include "base/time_util.h"
      10             : #include "db/db_table_partition.h"
      11             : 
      12             : using namespace std;
      13             : 
      14     9531348 : DBEntryBase::DBEntryBase()
      15     9531348 :         : tpart_(NULL), flags(0), last_change_at_(UTCTimestampUsec()) {
      16     9533833 :     onremoveq_ = false;
      17     9534136 : }
      18             : 
      19     9523167 : DBEntryBase::~DBEntryBase() {
      20     9523167 : }
      21             : 
      22     3712794 : void DBEntryBase::SetState(DBTableBase *tbl_base, ListenerId listener,
      23             :                            DBState *state) {
      24     3712794 :     DBTablePartBase *tpart = tbl_base->GetTablePartition(this);
      25     3713002 :     tbb::spin_rw_mutex::scoped_lock lock(tpart->dbstate_mutex(), true);
      26     3715264 :     pair<StateMap::iterator, bool> res = state_.insert(
      27     3714675 :         make_pair(listener, state));
      28     3714434 :     if (!res.second) {
      29     1229196 :         res.first->second = state;
      30             :     } else {
      31     2485238 :         assert(!IsDeleted());
      32             :         // Account for state addition for this listener.
      33     2485199 :         tbl_base->AddToDBStateCount(listener, 1);
      34             :     }
      35     3714373 : }
      36             : 
      37    12230766 : DBState *DBEntryBase::GetState(DBTableBase *tbl_base, ListenerId listener) const {
      38    12230766 :     DBTablePartBase *tpart = tbl_base->GetTablePartition(this);
      39    12228448 :     tbb::spin_rw_mutex::scoped_lock lock(tpart->dbstate_mutex(), false);
      40    12239164 :     StateMap::const_iterator loc = state_.find(listener);
      41    12224124 :     if (loc != state_.end()) {
      42     7847244 :         return loc->second;
      43             :     }
      44     4380515 :     return NULL;
      45    12227437 : }
      46             : 
      47         800 : const DBState *DBEntryBase::GetState(const DBTableBase *tbl_base,
      48             :                                      ListenerId listener) const {
      49         800 :     DBTableBase *table = const_cast<DBTableBase *>(tbl_base);
      50         800 :     DBTablePartBase *tpart = table->GetTablePartition(this);
      51         800 :     tbb::spin_rw_mutex::scoped_lock lock(tpart->dbstate_mutex(), false);
      52         800 :     StateMap::const_iterator loc = state_.find(listener);
      53         800 :     if (loc != state_.end()) {
      54         773 :         return loc->second;
      55             :     }
      56          27 :     return NULL;
      57         800 : }
      58             : 
      59             : //
      60             : // Concurrency: called from arbitrary task.
      61             : //
      62             : // Evaluate concurrency issues with DBTablePartBase::RunNotify when making
      63             : // changes to this method.  We expect that either this method or RunNotify
      64             : // is responsible for removing the DBEntryBase when they run concurrently,
      65             : // assuming the DBEntryBase is eligible for removal.  The dbstate_mutex in
      66             : // in DBTablePartBase is used for synchronization.
      67             : //
      68             : // Remove DBState on this DBEntryBase for the given listener and enqueue
      69             : // for removal if appropriate.
      70             : // Note that the entry cannot be removed from DBTablePartBase here since
      71             : // this method may be called from an arbitrary Task.
      72             : //
      73     2484839 : void DBEntryBase::ClearState(DBTableBase *tbl_base, ListenerId listener) {
      74     2484839 :     DBTablePartBase *tpart = tbl_base->GetTablePartition(this);
      75     2484747 :     tbb::spin_rw_mutex::scoped_lock lock(tpart->dbstate_mutex(), true);
      76             : 
      77     2485400 :     assert(state_.erase(listener) != 0);
      78             : 
      79             :     // Account for state removal for this listener.
      80     2484600 :     tbl_base->AddToDBStateCount(listener, -1);
      81             : 
      82     2485453 :     if (state_.empty() && IsDeleted() && !is_onlist() && !IsOnRemoveQ()) {
      83      522407 :         tbl_base->EnqueueRemove(this);
      84             :     }
      85     2485384 : }
      86             : 
      87     1058153 : bool DBEntryBase::is_state_empty(DBTablePartBase *tpart) {
      88     1058153 :     tbb::spin_rw_mutex::scoped_lock lock(tpart->dbstate_mutex(), false);
      89     2116451 :     return state_.empty();
      90     1058074 : }
      91             : 
      92      522387 : bool DBEntryBase::is_state_empty_unlocked(DBTablePartBase *tpart) {
      93      522387 :     return state_.empty();
      94             : }
      95             : 
      96     2185302 : void DBEntryBase::set_last_change_at_to_now() {
      97     2185302 :     last_change_at_ = UTCTimestampUsec();
      98     2185405 : }
      99             : 
     100           0 : void DBEntryBase::set_last_change_at(uint64_t time) {
     101           0 :     last_change_at_ = time;
     102           0 : }
     103             : 
     104     2302709 : void DBEntryBase::set_last_update_at_to_now() {
     105     2302709 :     last_update_at_ = UTCTimestampUsec();
     106     2302833 : }
     107             : 
     108         150 : void DBEntryBase::set_last_update_at(uint64_t time) {
     109         150 :     last_update_at_ = time;
     110         150 : }
     111     1432657 : void DBEntryBase::set_table_partition(DBTablePartBase *tpart) {
     112     1432657 :     tpart_ = tpart;
     113     1432657 : }
     114             : 
     115     3262528 : DBTablePartBase *DBEntryBase::get_table_partition() const {
     116     3262528 :     return tpart_;
     117             : }
     118             : 
     119     9377097 : DBTableBase *DBEntryBase::get_table() const {
     120     9377097 :     return (tpart_ ? tpart_->parent() : NULL);
     121             : }
     122             : 
     123           0 : const std::string DBEntryBase::last_change_at_str() const {
     124           0 :     return duration_usecs_to_string(UTCTimestampUsec() - last_change_at_);
     125             : }
     126             : 
     127       60149 : void DBEntryBase::Notify() {
     128       60149 :     tpart_->Notify(this);
     129       60149 : }
     130             : 
     131       48073 : void DBEntryBase::Delete() {
     132       48073 :     if (!IsDeleted())
     133       48073 :         tpart_->Delete(this);
     134       48073 : }