LCOV - code coverage report
Current view: top level - src/backend/replication - syncrep_gram.y (source / functions) Hit Total Coverage
Test: PostgreSQL 17devel Lines: 24 25 96.0 %
Date: 2024-02-22 00:11:39 Functions: 1 1 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : %{
       2             : /*-------------------------------------------------------------------------
       3             :  *
       4             :  * syncrep_gram.y               - Parser for synchronous_standby_names
       5             :  *
       6             :  * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
       7             :  * Portions Copyright (c) 1994, Regents of the University of California
       8             :  *
       9             :  *
      10             :  * IDENTIFICATION
      11             :  *    src/backend/replication/syncrep_gram.y
      12             :  *
      13             :  *-------------------------------------------------------------------------
      14             :  */
      15             : #include "postgres.h"
      16             : 
      17             : #include "nodes/pg_list.h"
      18             : #include "replication/syncrep.h"
      19             : 
      20             : /* Result of parsing is returned in one of these two variables */
      21             : SyncRepConfigData *syncrep_parse_result;
      22             : char       *syncrep_parse_error_msg;
      23             : 
      24             : static SyncRepConfigData *create_syncrep_config(const char *num_sync,
      25             :                     List *members, uint8 syncrep_method);
      26             : 
      27             : /*
      28             :  * Bison doesn't allocate anything that needs to live across parser calls,
      29             :  * so we can easily have it use palloc instead of malloc.  This prevents
      30             :  * memory leaks if we error out during parsing.
      31             :  */
      32             : #define YYMALLOC palloc
      33             : #define YYFREE   pfree
      34             : 
      35             : %}
      36             : 
      37             : %expect 0
      38             : %name-prefix="syncrep_yy"
      39             : 
      40             : %union
      41             : {
      42             :     char       *str;
      43             :     List       *list;
      44             :     SyncRepConfigData *config;
      45             : }
      46             : 
      47             : %token <str> NAME NUM JUNK ANY FIRST
      48             : 
      49             : %type <config> result standby_config
      50             : %type <list> standby_list
      51             : %type <str> standby_name
      52             : 
      53             : %start result
      54             : 
      55             : %%
      56             : result:
      57         126 :         standby_config              { syncrep_parse_result = $1; }
      58             :     ;
      59             : 
      60             : standby_config:
      61          90 :         standby_list                { $$ = create_syncrep_config("1", $1, SYNC_REP_PRIORITY); }
      62          24 :         | NUM '(' standby_list ')'      { $$ = create_syncrep_config($1, $3, SYNC_REP_PRIORITY); }
      63           8 :         | ANY NUM '(' standby_list ')'      { $$ = create_syncrep_config($2, $4, SYNC_REP_QUORUM); }
      64           4 :         | FIRST NUM '(' standby_list ')'        { $$ = create_syncrep_config($2, $4, SYNC_REP_PRIORITY); }
      65             :     ;
      66             : 
      67             : standby_list:
      68         126 :         standby_name                        { $$ = list_make1($1); }
      69          60 :         | standby_list ',' standby_name     { $$ = lappend($1, $3); }
      70             :     ;
      71             : 
      72             : standby_name:
      73         186 :         NAME                        { $$ = $1; }
      74           0 :         | NUM                       { $$ = $1; }
      75             :     ;
      76             : %%
      77             : 
      78             : static SyncRepConfigData *
      79         126 : create_syncrep_config(const char *num_sync, List *members, uint8 syncrep_method)
      80             : {
      81             :     SyncRepConfigData *config;
      82             :     int         size;
      83             :     ListCell   *lc;
      84             :     char       *ptr;
      85             : 
      86             :     /* Compute space needed for flat representation */
      87         126 :     size = offsetof(SyncRepConfigData, member_names);
      88         312 :     foreach(lc, members)
      89             :     {
      90         186 :         char       *standby_name = (char *) lfirst(lc);
      91             : 
      92         186 :         size += strlen(standby_name) + 1;
      93             :     }
      94             : 
      95             :     /* And transform the data into flat representation */
      96         126 :     config = (SyncRepConfigData *) palloc(size);
      97             : 
      98         126 :     config->config_size = size;
      99         126 :     config->num_sync = atoi(num_sync);
     100         126 :     config->syncrep_method = syncrep_method;
     101         126 :     config->nmembers = list_length(members);
     102         126 :     ptr = config->member_names;
     103         312 :     foreach(lc, members)
     104             :     {
     105         186 :         char       *standby_name = (char *) lfirst(lc);
     106             : 
     107         186 :         strcpy(ptr, standby_name);
     108         186 :         ptr += strlen(standby_name) + 1;
     109             :     }
     110             : 
     111         126 :     return config;
     112             : }

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