LCOV - code coverage report
Current view: top level - src - SerialInfo.h (source / functions) Hit Total Coverage
Test: app.info Lines: 35 48 72.9 %
Date: 2010-12-13 Functions: 6 8 75.0 %
Branches: 1 2 50.0 %

           Branch data     Line data    Source code
       1                 :            : // $Id: SerialInfo.h 6752 2009-06-14 04:24:52Z vern $
       2                 :            : //
       3                 :            : // Helper classes to pass data between serialization methods.
       4                 :            : 
       5                 :            : #ifndef serialinfo_h
       6                 :            : #define serialinfo_h
       7                 :            : 
       8                 :          3 : class SerialInfo {
       9                 :            : public:
      10                 :          3 :         SerialInfo(Serializer* arg_s)
      11                 :          3 :                 {
      12                 :          3 :                 chunk = 0;
      13                 :          3 :                 s = arg_s;
      14                 :          3 :                 may_suspend = clear_containers = false;
      15                 :          3 :                 cache = globals_as_names = true;
      16                 :          3 :                 type = SER_NONE;
      17                 :          3 :                 pid_32bit = false;
      18                 :          3 :                 include_locations = true;
      19                 :          3 :                 new_cache_strategy = false;
      20                 :          3 :                 }
      21                 :            : 
      22                 :          0 :         SerialInfo(const SerialInfo& info)
      23                 :          0 :                 {
      24                 :          0 :                 s = info.s;
      25                 :          0 :                 may_suspend = info.may_suspend;
      26                 :          0 :                 cache = info.cache;
      27                 :          0 :                 type = info.type;
      28                 :          0 :                 clear_containers = info.clear_containers;
      29                 :          0 :                 globals_as_names = info.globals_as_names;
      30                 :          0 :                 pid_32bit = info.pid_32bit;
      31                 :          0 :                 include_locations = info.include_locations;
      32                 :          0 :                 new_cache_strategy = info.new_cache_strategy;
      33                 :          0 :                 }
      34                 :            : 
      35                 :            :         // Parameters that control serialization.
      36                 :            :         Serializer* s;  // serializer to use
      37                 :            :         bool cache;     // true if object caching is ok
      38                 :            :         bool may_suspend;       // if true, suspending serialization is ok
      39                 :            :         bool clear_containers;  // if true, store container values as empty
      40                 :            :         bool include_locations; // if true, include locations in serialization
      41                 :            : 
      42                 :            :         // If true, for NameExpr's serialize just the names of globals, just
      43                 :            :         // their value.
      44                 :            :         bool globals_as_names;
      45                 :            : 
      46                 :            :         bool pid_32bit; // if true, use old-style 32-bit permanent IDs
      47                 :            : 
      48                 :            :         // If true, we support keeping objs in cache permanently.
      49                 :            :         bool new_cache_strategy;
      50                 :            : 
      51                 :            :         ChunkedIO::Chunk* chunk; // chunk written right before the serialization
      52                 :            : 
      53                 :            :         // Attributes set during serialization.
      54                 :            :         SerialType type;        // type of currently serialized object
      55                 :            : 
      56                 :            :         // State for suspending/resuming serialization
      57                 :            :         Continuation cont;
      58                 :            : };
      59                 :            : 
      60                 :            : class UnserialInfo {
      61                 :            : public:
      62                 :          2 :         UnserialInfo(Serializer* arg_s)
      63                 :            :                 {
      64                 :          2 :                 s = arg_s;
      65                 :          2 :                 cache = true;
      66                 :          2 :                 type = SER_NONE;
      67                 :          2 :                 chunk = 0;
      68                 :          2 :                 install_globals = install_conns = true;
      69                 :          2 :                 install_uniques = false;
      70                 :          2 :                 ignore_callbacks = false;
      71                 :          2 :                 id_policy = Replace;
      72                 :          2 :                 print = 0;
      73                 :          2 :                 pid_32bit = false;
      74                 :          2 :                 new_cache_strategy = false;
      75                 :          2 :                 }
      76                 :            : 
      77                 :            :         UnserialInfo(const UnserialInfo& info)
      78                 :            :                 {
      79                 :            :                 s = info.s;
      80                 :            :                 cache = info.cache;
      81                 :            :                 type = info.type;
      82                 :            :                 chunk = info.chunk;
      83                 :            :                 install_globals = info.install_globals;
      84                 :            :                 install_uniques = info.install_uniques;
      85                 :            :                 install_conns = info.install_conns;
      86                 :            :                 ignore_callbacks = info.ignore_callbacks;
      87                 :            :                 id_policy = info.id_policy;
      88                 :            :                 print = info.print;
      89                 :            :                 pid_32bit = info.pid_32bit;
      90                 :            :                 new_cache_strategy = info.new_cache_strategy;
      91                 :            :                 }
      92                 :            : 
      93                 :            :         // Parameters that control unserialization.
      94                 :            :         Serializer* s;  // serializer to use
      95                 :            :         bool cache;     // if true,  object caching is ok
      96                 :            :         FILE* print;    // print read objects to given file (human-readable)
      97                 :            : 
      98                 :            :         ChunkedIO::Chunk* chunk; // chunk to parse (rather than reading one)
      99                 :            : 
     100                 :            :         bool install_globals;   // if true, install unknown globals
     101                 :            :                                 // in global scope
     102                 :            :         bool install_conns;     // if true, add connections to session table
     103                 :            :         bool install_uniques;   // if true, install unknown globally
     104                 :            :                                 // unique IDs in global scope
     105                 :            :         bool ignore_callbacks;  // if true, don't call Got*() callbacks
     106                 :            :         bool pid_32bit; // if true, use old-style 32-bit permanent IDs.
     107                 :            : 
     108                 :            :         // If true, we support keeping objs in cache permanently.
     109                 :            :         bool new_cache_strategy;
     110                 :            : 
     111                 :            :         // If a global ID already exits, of these policies is used.
     112                 :            :         enum {
     113                 :            :                 Keep,   // keep the old ID and ignore the new
     114                 :            :                 Replace,        // install the new ID (default)
     115                 :            : 
     116                 :            :                 // Keep current ID instance but copy the new value into it
     117                 :            :                 // (types have to match).
     118                 :            :                 CopyNewToCurrent,
     119                 :            : 
     120                 :            :                 // Install the new ID instance but replace its value
     121                 :            :                 // with that of the old one (types have to match).
     122                 :            :                 CopyCurrentToNew,
     123                 :            : 
     124                 :            :                 // Instantiate a new ID, but do not insert it into the global
     125                 :            :                 // space.
     126                 :            :                 InstantiateNew,
     127                 :            :         } id_policy;
     128                 :            : 
     129                 :            :         // Attributes set during unserialization.
     130                 :            :         SerialType type;        // type of currently unserialized object
     131                 :            : };
     132                 :            : 
     133                 :            : // Helper class to temporarily disable suspending for all next-level calls
     134                 :            : // using the given SerialInfo.  It saves the current value of info.may_suspend
     135                 :            : // and then sets it to false.  When it goes out of scope, the original value
     136                 :            : // is restored.
     137                 :            : //
     138                 :            : // We need this because not all classes derived from SerialObj are
     139                 :            : // suspension-aware yet, i.e., they don't work correctly if one of the
     140                 :            : // next-level functions suspends. Eventually this may change, but actually
     141                 :            : // it's not very important: most classes don't need to suspend anyway as
     142                 :            : // their data volume is very small.  We have to make sure though that those
     143                 :            : // which do (e.g. TableVals) support suspension.
     144                 :            : class DisableSuspend {
     145                 :            : public:
     146                 :        121 :         DisableSuspend(SerialInfo* arg_info)
     147                 :            :                 {
     148                 :        121 :                 info = arg_info;
     149                 :        121 :                 old_may_suspend = info->may_suspend;
     150                 :        121 :                 info->may_suspend = false;
     151                 :        121 :                 }
     152                 :            : 
     153                 :        121 :         ~DisableSuspend()       { Restore(); }
     154                 :            : 
     155                 :          0 :         void Release()  { info = 0; }
     156                 :            : 
     157                 :            :         // Restores the suspension-state to its original value.
     158                 :        121 :         void Restore()
     159                 :            :                 {
     160         [ +  - ]:        121 :                 if ( info )
     161                 :        121 :                         info->may_suspend = old_may_suspend;
     162                 :        121 :                 }
     163                 :            : 
     164                 :            : private:
     165                 :            :         SerialInfo* info;
     166                 :            :         bool old_may_suspend;
     167                 :            : };
     168                 :            : 
     169                 :            : #endif

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