driver_state.c
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00015 #include <stdlib.h>
00016 #include <grass/dbmi.h>
00017 #include "dbstubs.h"
00018
00019
00020 static dbDriverState state;
00021
00025 void db__init_driver_state(void)
00026 {
00027 db_zero((void *)&state, sizeof(state));
00028 }
00029
00035 dbDriverState *db__get_driver_state(void)
00036 {
00037 return &state;
00038 }
00039
00046 int db__test_database_open(void)
00047 {
00048 return state.open ? 1 : 0;
00049 }
00050
00057 void db__mark_database_open(const char *dbname, const char *dbschema)
00058 {
00059 state.dbname = db_store(dbname);
00060 state.dbschema = db_store(dbschema);
00061 state.open = 1;
00062 }
00063
00067 void db__mark_database_closed(void)
00068 {
00069 free(state.dbname);
00070 free(state.dbschema);
00071 state.open = 0;
00072 }
00073
00079 void db__add_cursor_to_driver_state(dbCursor * cursor)
00080 {
00081 dbCursor **list;
00082 int i;
00083
00084
00085 list = state.cursor_list;
00086 for (i = 0; i < state.ncursors; i++)
00087 if (list[i] == NULL)
00088 break;
00089
00090
00091 if (i >= state.ncursors) {
00092 list =
00093 (dbCursor **) db_realloc((void *)list,
00094 (i + 1) * sizeof(dbCursor *));
00095 if (list == NULL)
00096 return;
00097 state.cursor_list = list;
00098 state.ncursors = i + 1;
00099 }
00100
00101
00102 list[i] = cursor;
00103 }
00104
00110 void db__drop_cursor_from_driver_state(dbCursor * cursor)
00111 {
00112 int i;
00113
00114 for (i = 0; i < state.ncursors; i++)
00115 if (state.cursor_list[i] == cursor)
00116 state.cursor_list[i] = NULL;
00117 }
00118
00122 void db__close_all_cursors(void)
00123 {
00124 int i;
00125
00126 for (i = 0; i < state.ncursors; i++)
00127 if (state.cursor_list[i])
00128 db_driver_close_cursor(state.cursor_list[i]);
00129
00130 if (state.cursor_list)
00131 free(state.cursor_list);
00132
00133 state.ncursors = 0;
00134 state.cursor_list = NULL;
00135 }