greenplumn simple_list 源码
greenplumn simple_list 代码
文件路径：/src/include/fe_utils/simple_list.h
/*-------------------------------------------------------------------------
*
* Simple list facilities for frontend code
*
* Data structures for simple lists of OIDs, strings, and pointers. The
* support for these is very primitive compared to the backend's List
* facilities, but it's all we need in, eg, pg_dump.
*
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/fe_utils/simple_list.h
*
*-------------------------------------------------------------------------
*/
#ifndef SIMPLE_LIST_H
#define SIMPLE_LIST_H
typedef struct SimpleOidListCell
{
struct SimpleOidListCell *next;
Oid val;
} SimpleOidListCell;
typedef struct SimpleOidList
{
SimpleOidListCell *head;
SimpleOidListCell *tail;
} SimpleOidList;
typedef struct SimpleStringListCell
{
struct SimpleStringListCell *next;
bool touched; /* true, when this string was searched and
* touched */
char val[FLEXIBLE_ARRAY_MEMBER]; /* null-terminated string here */
} SimpleStringListCell;
typedef struct SimpleStringList
{
SimpleStringListCell *head;
SimpleStringListCell *tail;
} SimpleStringList;
typedef struct SimplePtrListCell
{
struct SimplePtrListCell *next;
void *ptr;
} SimplePtrListCell;
typedef struct SimplePtrList
{
SimplePtrListCell *head;
SimplePtrListCell *tail;
} SimplePtrList;
extern void simple_oid_list_append(SimpleOidList *list, Oid val);
extern bool simple_oid_list_member(SimpleOidList *list, Oid val);
extern void simple_string_list_append(SimpleStringList *list, const char *val);
extern bool simple_string_list_member(SimpleStringList *list, const char *val);
extern const char *simple_string_list_not_touched(SimpleStringList *list);
extern void simple_ptr_list_append(SimplePtrList *list, void *val);
#endif /* SIMPLE_LIST_H */
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