Index: doc/src/sgml/runtime.sgml
===================================================================
RCS file: /projects/cvsroot/pgsql-server/doc/src/sgml/runtime.sgml,v
retrieving revision 1.263
diff -u -r1.263 runtime.sgml
--- doc/src/sgml/runtime.sgml 29 Apr 2004 04:37:09 -0000 1.263
+++ doc/src/sgml/runtime.sgml 9 May 2004 20:37:42 -0000
@@ -2924,6 +2924,60 @@
+
+ Customized Options
+
+
+ The following was designed to allow options not normally known to
+ PostgreSQL to be declared in the posgresql.conf
+ file and/or manipulated using the SET in a controlled
+ manner so that add-on modules to the postgres proper (such as lanugage
+ mappings for triggers and functions) can be configured in a unified way.
+
+
+
+
+
+ custom_variable_classes (string)
+ custom_variable_classes
+
+
+ This variable specifies one or several classes to be used for custom
+ variables. A custom variable is a variable not normally known to
+ the PostgreSQL proper but used by some add
+ on module.
+
+
+
+ Aribtrary variables can be defined for each class specified here. Those
+ variables will be treated as placeholders and have no meaning until the
+ module that defines them is loaded. When a module for a specific class is
+ loaded, it will add the proper variable definitions for the class
+ associated with it, convert any placeholder values according to those
+ definitions, and issue warnings for any placeholders that then remains.
+
+
+
+ Here is an example what custom variables might look like:
+
+
+custom_variable_class = 'plr,pljava'
+plr.foo = '/usr/lib/R'
+pljava.baz = 1
+plruby.var = true <== this one would generate an error
+
+
+
+
+ This option can only be set at server start or in the
+ postgresql.conf configuration file.
+
+
+
+
+
+
+
Developer Options
Index: src/backend/utils/misc/guc-file.l
===================================================================
RCS file: /projects/cvsroot/pgsql-server/src/backend/utils/misc/guc-file.l,v
retrieving revision 1.21
diff -u -r1.21 guc-file.l
--- src/backend/utils/misc/guc-file.l 24 Feb 2004 22:06:32 -0000 1.21
+++ src/backend/utils/misc/guc-file.l 9 May 2004 20:37:42 -0000
@@ -34,6 +34,7 @@
GUC_REAL = 4,
GUC_EQUALS = 5,
GUC_UNQUOTED_STRING = 6,
+ GUC_QUALIFIED_ID = 7,
GUC_EOL = 99,
GUC_ERROR = 100
};
@@ -65,6 +66,7 @@
LETTER_OR_DIGIT [A-Za-z_0-9\200-\377]
ID {LETTER}{LETTER_OR_DIGIT}*
+QUALIFIED_ID {ID}"."{ID}
UNQUOTED_STRING {LETTER}({LETTER_OR_DIGIT}|[-._:/])*
STRING \'([^'\n]|\\.)*\'
@@ -76,6 +78,7 @@
#.*$ /* eat comment */
{ID} return GUC_ID;
+{QUALIFIED_ID} return GUC_QUALIFIED_ID;
{STRING} return GUC_STRING;
{UNQUOTED_STRING} return GUC_UNQUOTED_STRING;
{INTEGER} return GUC_INTEGER;
@@ -180,7 +183,7 @@
case 0: /* no previous input */
if (token == GUC_EOL) /* empty line */
continue;
- if (token != GUC_ID)
+ if (token != GUC_ID && token != GUC_QUALIFIED_ID)
goto parse_error;
opt_name = strdup(yytext);
if (opt_name == NULL)
@@ -216,6 +219,24 @@
case 2: /* now we'd like an end of line */
if (token != GUC_EOL)
goto parse_error;
+
+ if (strcmp(opt_name, "custom_variable_classes") == 0)
+ {
+ /* This variable must be added first as it controls the validity
+ * of other variables
+ */
+ if (!set_config_option(opt_name, opt_value, context,
+ PGC_S_FILE, false, true))
+ {
+ FreeFile(fp);
+ free(filename);
+ goto cleanup_exit;
+ }
+
+ /* Don't include in list */
+ parse_state = 0;
+ break;
+ }
/* append to list */
item = malloc(sizeof *item);
Index: src/backend/utils/misc/guc.c
===================================================================
RCS file: /projects/cvsroot/pgsql-server/src/backend/utils/misc/guc.c,v
retrieving revision 1.205
diff -u -r1.205 guc.c
--- src/backend/utils/misc/guc.c 8 May 2004 02:11:46 -0000 1.205
+++ src/backend/utils/misc/guc.c 9 May 2004 20:37:43 -0000
@@ -20,6 +20,7 @@
#include
#include
#include
+#include
#include "utils/guc.h"
#include "utils/guc_tables.h"
@@ -103,6 +104,8 @@
static const char *assign_log_stmtlvl(int *var, const char *newval,
bool doit, GucSource source);
static bool assign_phony_autocommit(bool newval, bool doit, GucSource source);
+static const char *assign_custom_variable_classes(const char *newval, bool doit,
+ GucSource source);
static bool assign_stage_log_stats(bool newval, bool doit, GucSource source);
static bool assign_log_stats(bool newval, bool doit, GucSource source);
@@ -167,6 +170,7 @@
static char *session_authorization_string;
static char *timezone_string;
static char *XactIsoLevel_string;
+static char *custom_variable_classes;
static int max_function_args;
static int max_index_keys;
static int max_identifier_length;
@@ -1728,6 +1732,16 @@
XLOG_sync_method_default, assign_xlog_sync_method, NULL
},
+ {
+ {"custom_variable_classes", PGC_POSTMASTER, RESOURCES_KERNEL,
+ gettext_noop("Sets the list of known custom variable classes"),
+ NULL,
+ GUC_LIST_INPUT | GUC_LIST_QUOTE
+ },
+ &custom_variable_classes,
+ NULL, assign_custom_variable_classes, NULL
+ },
+
/* End-of-list marker */
{
{NULL, 0, 0, NULL, NULL}, NULL, NULL, NULL, NULL
@@ -1753,8 +1767,15 @@
/*
* Actual lookup of variables is done through this single, sorted array.
*/
-struct config_generic **guc_variables;
-int num_guc_variables;
+static struct config_generic **guc_variables;
+
+/* Current number of variables contained in the vector
+ */
+static int num_guc_variables;
+
+/* Vector capacity
+ */
+static int size_guc_variables;
static bool guc_dirty; /* TRUE if need to do commit/abort work */
@@ -1768,6 +1789,10 @@
static void ReportGUCOption(struct config_generic * record);
static char *_ShowOption(struct config_generic * record);
+struct config_generic** get_guc_variables()
+{
+ return guc_variables;
+}
/*
* Build the sorted array. This is split out so that it could be
@@ -1777,6 +1802,7 @@
void
build_guc_variables(void)
{
+ int size_vars;
int num_vars = 0;
struct config_generic **guc_vars;
int i;
@@ -1814,8 +1840,12 @@
num_vars++;
}
+ /* Create table with 20% slack
+ */
+ size_vars = num_vars + num_vars / 4;
+
guc_vars = (struct config_generic **)
- malloc(num_vars * sizeof(struct config_generic *));
+ malloc(size_vars * sizeof(struct config_generic *));
if (!guc_vars)
ereport(FATAL,
(errcode(ERRCODE_OUT_OF_MEMORY),
@@ -1835,15 +1865,105 @@
for (i = 0; ConfigureNamesString[i].gen.name; i++)
guc_vars[num_vars++] = &ConfigureNamesString[i].gen;
- qsort((void *) guc_vars, num_vars, sizeof(struct config_generic *),
- guc_var_compare);
-
if (guc_variables)
free(guc_variables);
guc_variables = guc_vars;
num_guc_variables = num_vars;
+ size_guc_variables = size_vars;
+ qsort((void*) guc_variables, num_guc_variables,
+ sizeof(struct config_generic*), guc_var_compare);
+}
+
+static bool
+is_custom_class(const char *name, int dotPos)
+{
+ /* The assign_custom_variable_classes has made sure no empty
+ * identifiers or whitespace exists in the variable
+ */
+ bool result = false;
+ const char *ccs = GetConfigOption("custom_variable_classes");
+ if(ccs != NULL)
+ {
+ const char *start = ccs;
+ for(;; ++ccs)
+ {
+ int c = *ccs;
+ if(c == 0 || c == ',')
+ {
+ if(dotPos == ccs - start && strncmp(start, name, dotPos) == 0)
+ {
+ result = true;
+ break;
+ }
+ if(c == 0)
+ break;
+ start = ccs + 1;
+ }
+ }
+ }
+ return result;
}
+/*
+ * Add a new GUC variable to the list of known variables. The
+ * list is expanded if needed.
+ */
+static void
+add_guc_variable(struct config_generic *var)
+{
+ if(num_guc_variables + 1 >= size_guc_variables)
+ {
+ /* Increase the vector with 20%
+ */
+ int size_vars = size_guc_variables + size_guc_variables / 4;
+ if(size_vars == 0)
+ size_vars = 100;
+
+ struct config_generic** guc_vars = (struct config_generic**)
+ malloc(size_vars * sizeof(struct config_generic*));
+
+ if (guc_variables != NULL)
+ {
+ memcpy(guc_vars, guc_variables,
+ num_guc_variables * sizeof(struct config_generic*));
+ free(guc_variables);
+ }
+
+ guc_variables = guc_vars;
+ size_guc_variables = size_vars;
+ }
+ guc_variables[num_guc_variables++] = var;
+ qsort((void*) guc_variables, num_guc_variables,
+ sizeof(struct config_generic*), guc_var_compare);
+}
+
+/*
+ * Create and add a placeholder variable. Its presumed to belong
+ * to a valid custom variable class at this point.
+ */
+static struct config_string*
+add_placeholder_variable(const char *name)
+{
+ size_t sz = sizeof(struct config_string) + sizeof(char*);
+ struct config_string* var = (struct config_string*)malloc(sz);
+ struct config_generic* gen = &var->gen;
+
+ memset(var, 0, sz);
+
+ gen->name = strdup(name);
+ gen->context = PGC_USERSET;
+ gen->group = CUSTOM_OPTIONS;
+ gen->short_desc = "GUC placeholder variable";
+ gen->flags = GUC_NO_SHOW_ALL | GUC_NOT_IN_SAMPLE | GUC_CUSTOM_PLACEHOLDER;
+ gen->vartype = PGC_STRING;
+
+ /* The char* is allocated at the end of the struct since we have
+ * no 'static' place to point to.
+ */
+ var->variable = (char**)(var + 1);
+ add_guc_variable((struct config_generic*)var);
+ return var;
+}
/*
* Look up option NAME. If it exists, return a pointer to its record,
@@ -1852,6 +1972,7 @@
static struct config_generic *
find_option(const char *name)
{
+ const char *dot;
const char **key = &name;
struct config_generic **res;
int i;
@@ -1881,6 +2002,16 @@
return find_option(map_old_guc_names[i+1]);
}
+ /* Check if the name is qualified, and if so, check if the qualifier
+ * maps to a custom variable class.
+ */
+ dot = strchr(name, GUC_QUALIFIER_SEPARATOR);
+ if(dot != NULL && is_custom_class(name, dot - name))
+ /*
+ * Add a placeholder variable for this name
+ */
+ return (struct config_generic*)add_placeholder_variable(name);
+
/* Unknown name */
return NULL;
}
@@ -3459,6 +3590,196 @@
PG_RETURN_TEXT_P(result_text);
}
+static void
+define_custom_variable(struct config_generic* variable)
+{
+ const char* name = variable->name;
+ const char** nameAddr = &name;
+ const char* value;
+ struct config_string* pHolder;
+ struct config_generic** res = (struct config_generic**)bsearch(
+ (void*)&nameAddr,
+ (void*)guc_variables,
+ num_guc_variables,
+ sizeof(struct config_generic*),
+ guc_var_compare);
+
+ if(res == NULL)
+ {
+ add_guc_variable(variable);
+ return;
+ }
+
+ /* This better be a placeholder
+ */
+ if(((*res)->flags & GUC_CUSTOM_PLACEHOLDER) == 0)
+ {
+ ereport(ERROR,
+ (errcode(ERRCODE_INTERNAL_ERROR),
+ errmsg("attempt to redefine parameter \"%s\"", name)));
+ }
+ pHolder = (struct config_string*)*res;
+
+ /* We have the same name, no sorting is necessary.
+ */
+ *res = variable;
+
+ value = *pHolder->variable;
+
+ /* Assign the variable stored in the placeholder to the real
+ * variable.
+ */
+ set_config_option(name, value,
+ pHolder->gen.context, pHolder->gen.source,
+ false, true);
+
+ /* Free up stuff occupied by the placeholder variable
+ */
+ if(value != NULL)
+ free((void*)value);
+
+ if(pHolder->reset_val != NULL && pHolder->reset_val != value)
+ free(pHolder->reset_val);
+
+ if(pHolder->session_val != NULL
+ && pHolder->session_val != value
+ && pHolder->session_val != pHolder->reset_val)
+ free(pHolder->session_val);
+
+ if(pHolder->tentative_val != NULL
+ && pHolder->tentative_val != value
+ && pHolder->tentative_val != pHolder->reset_val
+ && pHolder->tentative_val != pHolder->session_val)
+ free(pHolder->tentative_val);
+
+ free(pHolder);
+}
+
+static void init_custom_variable(
+ struct config_generic* gen,
+ const char* name,
+ const char* short_desc,
+ const char* long_desc,
+ GucContext context,
+ enum config_type type)
+{
+ gen->name = strdup(name);
+ gen->context = context;
+ gen->group = CUSTOM_OPTIONS;
+ gen->short_desc = short_desc;
+ gen->long_desc = long_desc;
+ gen->vartype = type;
+}
+
+void DefineCustomBoolVariable(
+ const char* name,
+ const char* short_desc,
+ const char* long_desc,
+ bool* valueAddr,
+ GucContext context,
+ GucBoolAssignHook assign_hook,
+ GucShowHook show_hook)
+{
+ size_t sz = sizeof(struct config_bool);
+ struct config_bool* var = (struct config_bool*)malloc(sz);
+
+ memset(var, 0, sz);
+ init_custom_variable(&var->gen, name, short_desc, long_desc, context, PGC_BOOL);
+
+ var->variable = valueAddr;
+ var->reset_val = *valueAddr;
+ var->assign_hook = assign_hook;
+ var->show_hook = show_hook;
+ define_custom_variable(&var->gen);
+}
+
+void DefineCustomIntVariable(
+ const char* name,
+ const char* short_desc,
+ const char* long_desc,
+ int* valueAddr,
+ GucContext context,
+ GucIntAssignHook assign_hook,
+ GucShowHook show_hook)
+{
+ size_t sz = sizeof(struct config_int);
+ struct config_int* var = (struct config_int*)malloc(sz);
+
+ memset(var, 0, sz);
+ init_custom_variable(&var->gen, name, short_desc, long_desc, context, PGC_INT);
+
+ var->variable = valueAddr;
+ var->reset_val = *valueAddr;
+ var->assign_hook = assign_hook;
+ var->show_hook = show_hook;
+ define_custom_variable(&var->gen);
+}
+
+void DefineCustomRealVariable(
+ const char* name,
+ const char* short_desc,
+ const char* long_desc,
+ double* valueAddr,
+ GucContext context,
+ GucRealAssignHook assign_hook,
+ GucShowHook show_hook)
+{
+ size_t sz = sizeof(struct config_real);
+ struct config_real* var = (struct config_real*)malloc(sz);
+
+ memset(var, 0, sz);
+ init_custom_variable(&var->gen, name, short_desc, long_desc, context, PGC_REAL);
+
+ var->variable = valueAddr;
+ var->reset_val = *valueAddr;
+ var->assign_hook = assign_hook;
+ var->show_hook = show_hook;
+ define_custom_variable(&var->gen);
+}
+
+void DefineCustomStringVariable(
+ const char* name,
+ const char* short_desc,
+ const char* long_desc,
+ char** valueAddr,
+ GucContext context,
+ GucStringAssignHook assign_hook,
+ GucShowHook show_hook)
+{
+ size_t sz = sizeof(struct config_string);
+ struct config_string* var = (struct config_string*)malloc(sz);
+
+ memset(var, 0, sz);
+ init_custom_variable(&var->gen, name, short_desc, long_desc, context, PGC_STRING);
+
+ var->variable = valueAddr;
+ var->reset_val = *valueAddr;
+ var->assign_hook = assign_hook;
+ var->show_hook = show_hook;
+ define_custom_variable(&var->gen);
+}
+
+extern void EmittWarningsOnPlaceholders(const char* className)
+{
+ struct config_generic** vars = guc_variables;
+ struct config_generic** last = vars + num_guc_variables;
+
+ int nameLen = strlen(className);
+ while(vars < last)
+ {
+ struct config_generic* var = *vars++;
+ if((var->flags & GUC_CUSTOM_PLACEHOLDER) != 0 &&
+ strncmp(className, var->name, nameLen) == 0 &&
+ var->name[nameLen] == GUC_QUALIFIER_SEPARATOR)
+ {
+ ereport(INFO,
+ (errcode(ERRCODE_UNDEFINED_OBJECT),
+ errmsg("unrecognized configuration parameter \"%s\"", var->name)));
+ }
+ }
+}
+
+
/*
* SHOW command
*/
@@ -4470,7 +4791,7 @@
else {
if (source >= PGC_S_INTERACTIVE)
ereport(ERROR,
- (errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+ ((ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("unrecognised \"log_destination\" key word: \"%s\"",
tok)));
pfree(rawstring);
@@ -4710,6 +5031,68 @@
return true;
}
+static const char *
+assign_custom_variable_classes(const char *newval, bool doit, GucSource source)
+{
+ /* Check syntax. newval must be a comma separated list of identifiers.
+ * Whitespace is allowed but skipped.
+ */
+ bool hasSpaceAfterToken = false;
+ const char *cp = newval;
+ int symLen = 0;
+ int c;
+ StringInfoData buf;
+
+ initStringInfo(&buf);
+ while((c = *cp++) != 0)
+ {
+ if(isspace(c))
+ {
+ if(symLen > 0)
+ hasSpaceAfterToken = true;
+ continue;
+ }
+
+ if(c == ',')
+ {
+ hasSpaceAfterToken = false;
+ if(symLen > 0)
+ {
+ symLen = 0;
+ appendStringInfoChar(&buf, ',');
+ }
+ continue;
+ }
+
+ if(hasSpaceAfterToken || !isalnum(c))
+ {
+ /* Syntax error due to token following space after
+ * token or non alpha numeric character
+ */
+ pfree(buf.data);
+ ereport(WARNING,
+ (errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("illegal syntax for custom_variable_classes \"%s\"", newval)));
+ return NULL;
+ }
+ symLen++;
+ appendStringInfoChar(&buf, (char)c);
+ }
+
+ if(symLen == 0 && buf.len > 0)
+ /*
+ * Remove stray ',' at end
+ */
+ buf.data[--buf.len] = 0;
+
+ if(buf.len == 0)
+ newval = NULL;
+ else if(doit)
+ newval = strdup(buf.data);
+
+ pfree(buf.data);
+ return newval;
+}
static bool
assign_stage_log_stats(bool newval, bool doit, GucSource source)
Index: src/backend/utils/misc/help_config.c
===================================================================
RCS file: /projects/cvsroot/pgsql-server/src/backend/utils/misc/help_config.c,v
retrieving revision 1.9
diff -u -r1.9 help_config.c
--- src/backend/utils/misc/help_config.c 29 Nov 2003 19:52:04 -0000 1.9
+++ src/backend/utils/misc/help_config.c 9 May 2004 20:37:43 -0000
@@ -47,13 +47,15 @@
GucInfoMain(void)
{
int i;
+ struct config_generic **guc_vars = get_guc_variables();
+ int numOpts = GetNumConfigOptions();
/* Initialize the guc_variables[] array */
build_guc_variables();
- for (i = 0; i < num_guc_variables; i++)
+ for (i = 0; i < numOpts; i++)
{
- mixedStruct *var = (mixedStruct *) guc_variables[i];
+ mixedStruct *var = (mixedStruct *) guc_vars[i];
if (displayStruct(var))
printMixedStruct(var);
Index: src/include/utils/guc.h
===================================================================
RCS file: /projects/cvsroot/pgsql-server/src/include/utils/guc.h,v
retrieving revision 1.45
diff -u -r1.45 guc.h
--- src/include/utils/guc.h 7 Apr 2004 05:05:50 -0000 1.45
+++ src/include/utils/guc.h 9 May 2004 20:37:44 -0000
@@ -102,6 +102,15 @@
PGC_S_SESSION /* SET command */
} GucSource;
+typedef const char* (*GucStringAssignHook)(const char *newval, bool doit, GucSource source);
+typedef bool (*GucBoolAssignHook)(bool newval, bool doit, GucSource source);
+typedef bool (*GucIntAssignHook)(int newval, bool doit, GucSource source);
+typedef bool (*GucRealAssignHook)(double newval, bool doit, GucSource source);
+
+typedef const char* (*GucShowHook)(void);
+
+#define GUC_QUALIFIER_SEPARATOR '.'
+
/* GUC vars that are actually declared in guc.c, rather than elsewhere */
extern bool log_duration;
extern bool Debug_print_plan;
@@ -129,6 +138,45 @@
extern void SetConfigOption(const char *name, const char *value,
GucContext context, GucSource source);
+
+extern void DefineCustomBoolVariable(
+ const char* name,
+ const char* short_desc,
+ const char* long_desc,
+ bool* valueAddr,
+ GucContext context,
+ GucBoolAssignHook assign_hook,
+ GucShowHook show_hook);
+
+extern void DefineCustomIntVariable(
+ const char* name,
+ const char* short_desc,
+ const char* long_desc,
+ int* valueAddr,
+ GucContext context,
+ GucIntAssignHook assign_hook,
+ GucShowHook show_hook);
+
+extern void DefineCustomRealVariable(
+ const char* name,
+ const char* short_desc,
+ const char* long_desc,
+ double* valueAddr,
+ GucContext context,
+ GucRealAssignHook assign_hook,
+ GucShowHook show_hook);
+
+extern void DefineCustomStringVariable(
+ const char* name,
+ const char* short_desc,
+ const char* long_desc,
+ char** valueAddr,
+ GucContext context,
+ GucStringAssignHook assign_hook,
+ GucShowHook show_hook);
+
+extern void EmittWarningsOnPlaceholders(const char* className);
+
extern const char *GetConfigOption(const char *name);
extern const char *GetConfigOptionResetString(const char *name);
extern void ProcessConfigFile(GucContext context);
Index: src/include/utils/guc_tables.h
===================================================================
RCS file: /projects/cvsroot/pgsql-server/src/include/utils/guc_tables.h,v
retrieving revision 1.10
diff -u -r1.10 guc_tables.h
--- src/include/utils/guc_tables.h 5 Apr 2004 03:02:11 -0000 1.10
+++ src/include/utils/guc_tables.h 9 May 2004 20:37:44 -0000
@@ -51,7 +51,8 @@
COMPAT_OPTIONS_PREVIOUS,
COMPAT_OPTIONS_CLIENT,
DEVELOPER_OPTIONS,
- COMPILE_OPTIONS
+ COMPILE_OPTIONS,
+ CUSTOM_OPTIONS
};
/*
@@ -98,6 +99,7 @@
#define GUC_REPORT 0x0010 /* auto-report changes to client */
#define GUC_NOT_IN_SAMPLE 0x0020 /* not in postgresql.conf.sample */
#define GUC_DISALLOW_IN_FILE 0x0040 /* can't set in postgresql.conf */
+#define GUC_CUSTOM_PLACEHOLDER 0x0080 /* placeholder for a custom variable */
/* bit values in status field */
#define GUC_HAVE_TENTATIVE 0x0001 /* tentative value is defined */
@@ -113,8 +115,8 @@
/* (all but reset_val are constants) */
bool *variable;
bool reset_val;
- bool (*assign_hook) (bool newval, bool doit, GucSource source);
- const char *(*show_hook) (void);
+ GucBoolAssignHook assign_hook;
+ GucShowHook show_hook;
/* variable fields, initialized at runtime: */
bool session_val;
bool tentative_val;
@@ -129,8 +131,8 @@
int reset_val;
int min;
int max;
- bool (*assign_hook) (int newval, bool doit, GucSource source);
- const char *(*show_hook) (void);
+ GucIntAssignHook assign_hook;
+ GucShowHook show_hook;
/* variable fields, initialized at runtime: */
int session_val;
int tentative_val;
@@ -145,8 +147,8 @@
double reset_val;
double min;
double max;
- bool (*assign_hook) (double newval, bool doit, GucSource source);
- const char *(*show_hook) (void);
+ GucRealAssignHook assign_hook;
+ GucShowHook show_hook;
/* variable fields, initialized at runtime: */
double session_val;
double tentative_val;
@@ -159,8 +161,8 @@
/* (all are constants) */
char **variable;
const char *boot_val;
- const char *(*assign_hook) (const char *newval, bool doit, GucSource source);
- const char *(*show_hook) (void);
+ GucStringAssignHook assign_hook;
+ GucShowHook show_hook;
/* variable fields, initialized at runtime: */
char *reset_val;
char *session_val;
@@ -173,9 +175,8 @@
extern const char *const GucContext_Names[];
extern const char *const GucSource_Names[];
-/* the current set of variables */
-extern struct config_generic **guc_variables;
-extern int num_guc_variables;
+/* get the current set of variables */
+extern struct config_generic **get_guc_variables(void);
extern void build_guc_variables(void);