diff options
Diffstat (limited to 'libs/fastindex')
| -rw-r--r-- | libs/fastindex/Makefile | 13 | ||||
| -rw-r--r-- | libs/fastindex/src/fastindex.c | 379 | ||||
| -rw-r--r-- | libs/fastindex/src/list.h | 601 |
3 files changed, 0 insertions, 993 deletions
diff --git a/libs/fastindex/Makefile b/libs/fastindex/Makefile deleted file mode 100644 index ee1a40ea80..0000000000 --- a/libs/fastindex/Makefile +++ /dev/null @@ -1,13 +0,0 @@ -include ../../build/module.mk -include ../../build/config.mk -include ../../build/gccconfig.mk - -%.o: %.c - $(COMPILE) $(LUA_CFLAGS) $(FPIC) -c -o $@ $< - -compile: src/fastindex.o - mkdir -p dist$(LUCI_LIBRARYDIR) - $(LINK) $(SHLIB_FLAGS) -o dist$(LUCI_LIBRARYDIR)/fastindex.so src/fastindex.o $(LUA_SHLIBS) - -clean: - rm -f src/*.o diff --git a/libs/fastindex/src/fastindex.c b/libs/fastindex/src/fastindex.c deleted file mode 100644 index c9c64bf750..0000000000 --- a/libs/fastindex/src/fastindex.c +++ /dev/null @@ -1,379 +0,0 @@ -/* - * fastindex - fast lua module indexing plugin - * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 - * as published by the Free Software Foundation - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ - -#include <sys/types.h> -#include <sys/time.h> -#include <sys/cdefs.h> - -#ifndef _POSIX_C_SOURCE -#define _POSIX_C_SOURCE /* XXX: portability hack for timestamp */ -#endif - -#include <sys/stat.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <stdio.h> -#include <errno.h> -#include <glob.h> - -#include <lualib.h> -#include <lauxlib.h> -#include "list.h" - -#define MODNAME "luci.fastindex" -#define DEFAULT_BUFLEN 1024 - -//#define DEBUG 1 - -#ifdef DEBUG -#define DPRINTF(...) fprintf(stderr, __VA_ARGS__) -#else -#define DPRINTF(...) do {} while (0) -#endif - -/** - * list_for_each_offset - iterate over a list, start with the provided pointer - * @pos: the &struct list_head to use as a loop cursor. - * @head: the head for your list. - */ -#define list_for_each_offset(pos, head, offset) \ - for (pos = (offset)->next; pos != (offset); \ - pos = ((pos->next == (head)) && ((offset) != (head)) ? (head)->next : pos->next)) - -static char *namespace = NULL; - -struct fastindex_entry { - struct list_head list; - time_t timestamp; - int checked; - char *name; -}; - -struct fastindex_pattern { - struct list_head list; - char pattern[]; -}; - -struct fastindex { - lua_State *L; - int checked; - char *func; - struct list_head patterns; - struct list_head *last; - struct list_head entries; - int ofs; - char *buf; - int buflen; -}; - -static inline struct fastindex * -to_fastindex(struct lua_State *L) -{ - struct fastindex *f; - lua_getfield(L, lua_upvalueindex(1), "__data"); - f = lua_touserdata(L, -1); - lua_pop(L, 1); - return f; -} - -static int -fastindex_module(lua_State *L) -{ - const char *s; - s = luaL_checkstring(L, 1); - - if (s) { - if (namespace) - free(namespace); - namespace = strdup(s); - } - - return 0; -} - -static struct fastindex_entry * -find_entry(struct fastindex *f, char *name) -{ - struct list_head *p; - - if (!f->last) - f->last = &f->entries; - - list_for_each_offset(p, &f->entries, f->last) { - struct fastindex_entry *e; - e = container_of(p, struct fastindex_entry, list); - if (!strcmp(e->name, name)) - return e; - } - return NULL; -} - -static struct fastindex_entry * -new_entry(struct fastindex *f, char *name) -{ - struct fastindex_entry *e; - - e = malloc(sizeof(struct fastindex_entry)); - if (!e) - goto error; - - memset(e, 0, sizeof(struct fastindex_entry)); - e->name = strdup(name); - if (!e->name) { - free(e); - goto error; - } - INIT_LIST_HEAD(&e->list); - - return e; - -error: - return NULL; -} - -static void free_entry(struct fastindex_entry *e) -{ - list_del(&e->list); - free(e->name); - free(e); -} - -int bufferwriter(lua_State *L, const void *p, size_t sz, void *ud) -{ - struct fastindex *f = ud; - - while (f->ofs + sz > f->buflen) { - char *b = f->buf; - f->buflen *= 2; - f->buf = realloc(f->buf, f->buflen); - if (!f->buf) { - free(b); - return 1; - } - } - memcpy(f->buf + f->ofs, p, sz); - f->ofs += sz; - return 0; -} - -static void -load_index(struct fastindex *f, struct fastindex_entry *e) -{ - lua_State *L; - - DPRINTF("Loading module: %s\n", e->name); - - if (!f->buf) - f->buf = malloc(f->buflen); - - if (!f->buf) - luaL_error(f->L, "Out of memory!\n"); - - f->ofs = 0; - L = luaL_newstate(); - if (!L) - return; - - namespace = NULL; - luaL_openlibs(L); - lua_pushcfunction(L, fastindex_module); - lua_setfield(L, LUA_GLOBALSINDEX, "module"); - - do { - if (luaL_dofile(L, e->name)) { - DPRINTF("Warning: unable to open module '%s'\n", e->name); - break; - } - - lua_getglobal(L, f->func); - lua_dump(L, bufferwriter, f); - DPRINTF("Got %d bytes\n", f->ofs); - if (f->ofs == 0) - break; - lua_createtable(f->L, (namespace ? 2 : 1), 0); - luaL_loadbuffer(f->L, f->buf, f->ofs, "tmp"); - lua_rawseti(f->L, -2, 1); - if (namespace) { - DPRINTF("Module has namespace '%s'\n", namespace); - lua_pushstring(f->L, namespace); - lua_rawseti(f->L, -2, 2); - free(namespace); - namespace = NULL; - } - lua_setfield(f->L, -2, e->name); - } while (0); - - lua_close(L); -} - - -static int -fastindex_scan(lua_State *L) -{ - struct list_head *tmp, *p; - struct fastindex *f; - glob_t gl; - int i; - int gl_flags = GLOB_NOESCAPE | GLOB_NOSORT | GLOB_MARK; - - f = to_fastindex(L); - f->checked++; - - - if (list_empty(&f->patterns)) - return 0; - - lua_getfield(L, lua_upvalueindex(1), "indexes"); - list_for_each(p, &f->patterns) { - struct fastindex_pattern *pt = container_of(p, struct fastindex_pattern, list); - glob(pt->pattern, gl_flags, NULL, &gl); - gl_flags |= GLOB_APPEND; - } - for (i = 0; i < gl.gl_pathc; i++) { - struct fastindex_entry *e; - struct stat st; - - if (stat(gl.gl_pathv[i], &st)) - continue; - - if ((st.st_mode & S_IFMT) != S_IFREG) - continue; - - e = find_entry(f, gl.gl_pathv[i]); - if (!e) { - e = new_entry(f, gl.gl_pathv[i]); - list_add_tail(&e->list, &f->entries); - } - - e->checked = f->checked; - if ((e->timestamp < st.st_mtime)) { - load_index(f, e); - e->timestamp = st.st_mtime; - } - } - globfree(&gl); - list_for_each_safe(p, tmp, &f->entries) { - struct fastindex_entry *e = container_of(p, struct fastindex_entry, list); - if (e->checked < f->checked) { - lua_pushnil(f->L); - lua_setfield(f->L, -2, e->name); - free_entry(e); - } - } - lua_pop(L, 1); - - return 0; -} - -static int -fastindex_free(lua_State *L) -{ - struct fastindex *f; - struct list_head *p, *tmp; - - f = lua_touserdata(L, -1); - list_for_each_safe(p, tmp, &f->patterns) { - struct fastindex_pattern *pt; - pt = container_of(p, struct fastindex_pattern, list); - list_del(p); - free(pt); - } - list_for_each_safe(p, tmp, &f->entries) { - struct fastindex_entry *e; - e = container_of(p, struct fastindex_entry, list); - free_entry(e); - } - return 0; -} - -static int -fastindex_add(lua_State *L) -{ - struct fastindex_pattern *pt; - struct fastindex *f; - const char *str; - - f = to_fastindex(L); - str = luaL_checkstring(L, 1); - if (!str) - luaL_error(L, "Invalid argument"); - - pt = malloc(sizeof(struct fastindex_pattern) + strlen(str) + 1); - if (!pt) - luaL_error(L, "Out of memory"); - - INIT_LIST_HEAD(&pt->list); - strcpy(pt->pattern, str); - list_add(&pt->list, &f->patterns); - - return 0; -} - -static const luaL_Reg fastindex_m[] = { - { "add", fastindex_add }, - { "scan", fastindex_scan }, - { NULL, NULL } -}; - -static int -fastindex_new(lua_State *L) -{ - struct fastindex *f; - const char *func; - - func = luaL_checkstring(L, 1); - - f = lua_newuserdata(L, sizeof(struct fastindex)); - lua_createtable(L, 0, 2); - lua_pushvalue(L, -1); - lua_setfield(L, -2, "__index"); - lua_pushcfunction(L, fastindex_free); - lua_setfield(L, -2, "__gc"); - lua_pushvalue(L, -1); - lua_setmetatable(L, -3); - lua_pushvalue(L, -2); - lua_setfield(L, -2, "__data"); - lua_createtable(L, 0, 1); - lua_setfield(L, -2, "indexes"); - lua_pushvalue(L, -2); - luaI_openlib(L, NULL, fastindex_m, 1); - - memset(f, 0, sizeof(struct fastindex)); - f->L = L; - f->buflen = DEFAULT_BUFLEN; - INIT_LIST_HEAD(&f->entries); - INIT_LIST_HEAD(&f->patterns); - - f->func = strdup(func); - if (!f->func) { - if (f->func) - free(f->func); - luaL_error(L, "Out of memory\n"); - } - - return 1; -} - -static const luaL_Reg fastindex[] = { - { "new", fastindex_new }, - { NULL, NULL }, -}; - -int -luaopen_luci_fastindex(lua_State *L) -{ - luaL_register(L, MODNAME, fastindex); - return 0; -} diff --git a/libs/fastindex/src/list.h b/libs/fastindex/src/list.h deleted file mode 100644 index 2959a061d3..0000000000 --- a/libs/fastindex/src/list.h +++ /dev/null @@ -1,601 +0,0 @@ -#ifndef _LINUX_LIST_H -#define _LINUX_LIST_H - -#include <stddef.h> -/** - * container_of - cast a member of a structure out to the containing structure - * @ptr: the pointer to the member. - * @type: the type of the container struct this is embedded in. - * @member: the name of the member within the struct. - * - */ -#ifndef container_of -#define container_of(ptr, type, member) ( \ - (type *)( (char *)ptr - offsetof(type,member) )) -#endif - - -/* - * Simple doubly linked list implementation. - * - * Some of the internal functions ("__xxx") are useful when - * manipulating whole lists rather than single entries, as - * sometimes we already know the next/prev entries and we can - * generate better code by using them directly rather than - * using the generic single-entry routines. - */ - -struct list_head { - struct list_head *next, *prev; -}; - -#define LIST_HEAD_INIT(name) { &(name), &(name) } - -#define LIST_HEAD(name) \ - struct list_head name = LIST_HEAD_INIT(name) - -static inline void INIT_LIST_HEAD(struct list_head *list) -{ - list->next = list; - list->prev = list; -} - -/* - * Insert a new entry between two known consecutive entries. - * - * This is only for internal list manipulation where we know - * the prev/next entries already! - */ -static inline void __list_add(struct list_head *new, - struct list_head *prev, - struct list_head *next) -{ - next->prev = new; - new->next = next; - new->prev = prev; - prev->next = new; -} - -/** - * list_add - add a new entry - * @new: new entry to be added - * @head: list head to add it after - * - * Insert a new entry after the specified head. - * This is good for implementing stacks. - */ -static inline void list_add(struct list_head *new, struct list_head *head) -{ - __list_add(new, head, head->next); -} - - -/** - * list_add_tail - add a new entry - * @new: new entry to be added - * @head: list head to add it before - * - * Insert a new entry before the specified head. - * This is useful for implementing queues. - */ -static inline void list_add_tail(struct list_head *new, struct list_head *head) -{ - __list_add(new, head->prev, head); -} - - -/* - * Delete a list entry by making the prev/next entries - * point to each other. - * - * This is only for internal list manipulation where we know - * the prev/next entries already! - */ -static inline void __list_del(struct list_head * prev, struct list_head * next) -{ - next->prev = prev; - prev->next = next; -} - -/** - * list_del - deletes entry from list. - * @entry: the element to delete from the list. - * Note: list_empty() on entry does not return true after this, the entry is - * in an undefined state. - */ -static inline void list_del(struct list_head *entry) -{ - __list_del(entry->prev, entry->next); - entry->next = NULL; - entry->prev = NULL; -} - -/** - * list_replace - replace old entry by new one - * @old : the element to be replaced - * @new : the new element to insert - * - * If @old was empty, it will be overwritten. - */ -static inline void list_replace(struct list_head *old, - struct list_head *new) -{ - new->next = old->next; - new->next->prev = new; - new->prev = old->prev; - new->prev->next = new; -} - -static inline void list_replace_init(struct list_head *old, - struct list_head *new) -{ - list_replace(old, new); - INIT_LIST_HEAD(old); -} - -/** - * list_del_init - deletes entry from list and reinitialize it. - * @entry: the element to delete from the list. - */ -static inline void list_del_init(struct list_head *entry) -{ - __list_del(entry->prev, entry->next); - INIT_LIST_HEAD(entry); -} - -/** - * list_move - delete from one list and add as another's head - * @list: the entry to move - * @head: the head that will precede our entry - */ -static inline void list_move(struct list_head *list, struct list_head *head) -{ - __list_del(list->prev, list->next); - list_add(list, head); -} - -/** - * list_move_tail - delete from one list and add as another's tail - * @list: the entry to move - * @head: the head that will follow our entry - */ -static inline void list_move_tail(struct list_head *list, - struct list_head *head) -{ - __list_del(list->prev, list->next); - list_add_tail(list, head); -} - -/** - * list_is_last - tests whether @list is the last entry in list @head - * @list: the entry to test - * @head: the head of the list - */ -static inline int list_is_last(const struct list_head *list, - const struct list_head *head) -{ - return list->next == head; -} - -/** - * list_empty - tests whether a list is empty - * @head: the list to test. - */ -static inline int list_empty(const struct list_head *head) -{ - return head->next == head; -} - -/** - * list_empty_careful - tests whether a list is empty and not being modified - * @head: the list to test - * - * Description: - * tests whether a list is empty _and_ checks that no other CPU might be - * in the process of modifying either member (next or prev) - * - * NOTE: using list_empty_careful() without synchronization - * can only be safe if the only activity that can happen - * to the list entry is list_del_init(). Eg. it cannot be used - * if another CPU could re-list_add() it. - */ -static inline int list_empty_careful(const struct list_head *head) -{ - struct list_head *next = head->next; - return (next == head) && (next == head->prev); -} - -static inline void __list_splice(struct list_head *list, - struct list_head *head) -{ - struct list_head *first = list->next; - struct list_head *last = list->prev; - struct list_head *at = head->next; - - first->prev = head; - head->next = first; - - last->next = at; - at->prev = last; -} - -/** - * list_splice - join two lists - * @list: the new list to add. - * @head: the place to add it in the first list. - */ -static inline void list_splice(struct list_head *list, struct list_head *head) -{ - if (!list_empty(list)) - __list_splice(list, head); -} - -/** - * list_splice_init - join two lists and reinitialise the emptied list. - * @list: the new list to add. - * @head: the place to add it in the first list. - * - * The list at @list is reinitialised - */ -static inline void list_splice_init(struct list_head *list, - struct list_head *head) -{ - if (!list_empty(list)) { - __list_splice(list, head); - INIT_LIST_HEAD(list); - } -} - -/** - * list_entry - get the struct for this entry - * @ptr: the &struct list_head pointer. - * @type: the type of the struct this is embedded in. - * @member: the name of the list_struct within the struct. - */ -#define list_entry(ptr, type, member) \ - container_of(ptr, type, member) - -/** - * list_first_entry - get the first element from a list - * @ptr: the list head to take the element from. - * @type: the type of the struct this is embedded in. - * @member: the name of the list_struct within the struct. - * - * Note, that list is expected to be not empty. - */ -#define list_first_entry(ptr, type, member) \ - list_entry((ptr)->next, type, member) - -/** - * list_for_each - iterate over a list - * @pos: the &struct list_head to use as a loop cursor. - * @head: the head for your list. - */ -#define list_for_each(pos, head) \ - for (pos = (head)->next; pos != (head); \ - pos = pos->next) - -/** - * __list_for_each - iterate over a list - * @pos: the &struct list_head to use as a loop cursor. - * @head: the head for your list. - * - * This variant differs from list_for_each() in that it's the - * simplest possible list iteration code, no prefetching is done. - * Use this for code that knows the list to be very short (empty - * or 1 entry) most of the time. - */ -#define __list_for_each(pos, head) \ - for (pos = (head)->next; pos != (head); pos = pos->next) - -/** - * list_for_each_prev - iterate over a list backwards - * @pos: the &struct list_head to use as a loop cursor. - * @head: the head for your list. - */ -#define list_for_each_prev(pos, head) \ - for (pos = (head)->prev; pos != (head); \ - pos = pos->prev) - -/** - * list_for_each_safe - iterate over a list safe against removal of list entry - * @pos: the &struct list_head to use as a loop cursor. - * @n: another &struct list_head to use as temporary storage - * @head: the head for your list. - */ -#define list_for_each_safe(pos, n, head) \ - for (pos = (head)->next, n = pos->next; pos != (head); \ - pos = n, n = pos->next) - -/** - * list_for_each_prev_safe - iterate over a list backwards safe against removal of list entry - * @pos: the &struct list_head to use as a loop cursor. - * @n: another &struct list_head to use as temporary storage - * @head: the head for your list. - */ -#define list_for_each_prev_safe(pos, n, head) \ - for (pos = (head)->prev, n = pos->prev; \ - pos != (head); \ - pos = n, n = pos->prev) - -/** - * list_for_each_entry - iterate over list of given type - * @pos: the type * to use as a loop cursor. - * @head: the head for your list. - * @member: the name of the list_struct within the struct. - */ -#define list_for_each_entry(pos, head, member) \ - for (pos = list_entry((head)->next, typeof(*pos), member); \ - &pos->member != (head); \ - pos = list_entry(pos->member.next, typeof(*pos), member)) - -/** - * list_for_each_entry_reverse - iterate backwards over list of given type. - * @pos: the type * to use as a loop cursor. - * @head: the head for your list. - * @member: the name of the list_struct within the struct. - */ -#define list_for_each_entry_reverse(pos, head, member) \ - for (pos = list_entry((head)->prev, typeof(*pos), member); \ - &pos->member != (head); \ - pos = list_entry(pos->member.prev, typeof(*pos), member)) - -/** - * list_prepare_entry - prepare a pos entry for use in list_for_each_entry_continue() - * @pos: the type * to use as a start point - * @head: the head of the list - * @member: the name of the list_struct within the struct. - * - * Prepares a pos entry for use as a start point in list_for_each_entry_continue(). - */ -#define list_prepare_entry(pos, head, member) \ - ((pos) ? : list_entry(head, typeof(*pos), member)) - -/** - * list_for_each_entry_continue - continue iteration over list of given type - * @pos: the type * to use as a loop cursor. - * @head: the head for your list. - * @member: the name of the list_struct within the struct. - * - * Continue to iterate over list of given type, continuing after - * the current position. - */ -#define list_for_each_entry_continue(pos, head, member) \ - for (pos = list_entry(pos->member.next, typeof(*pos), member); \ - &pos->member != (head); \ - pos = list_entry(pos->member.next, typeof(*pos), member)) - -/** - * list_for_each_entry_continue_reverse - iterate backwards from the given point - * @pos: the type * to use as a loop cursor. - * @head: the head for your list. - * @member: the name of the list_struct within the struct. - * - * Start to iterate over list of given type backwards, continuing after - * the current position. - */ -#define list_for_each_entry_continue_reverse(pos, head, member) \ - for (pos = list_entry(pos->member.prev, typeof(*pos), member); \ - &pos->member != (head); \ - pos = list_entry(pos->member.prev, typeof(*pos), member)) - -/** - * list_for_each_entry_from - iterate over list of given type from the current point - * @pos: the type * to use as a loop cursor. - * @head: the head for your list. - * @member: the name of the list_struct within the struct. - * - * Iterate over list of given type, continuing from current position. - */ -#define list_for_each_entry_from(pos, head, member) \ - for (; &pos->member != (head); \ - pos = list_entry(pos->member.next, typeof(*pos), member)) - -/** - * list_for_each_entry_safe - iterate over list of given type safe against removal of list entry - * @pos: the type * to use as a loop cursor. - * @n: another type * to use as temporary storage - * @head: the head for your list. - * @member: the name of the list_struct within the struct. - */ -#define list_for_each_entry_safe(pos, n, head, member) \ - for (pos = list_entry((head)->next, typeof(*pos), member), \ - n = list_entry(pos->member.next, typeof(*pos), member); \ - &pos->member != (head); \ - pos = n, n = list_entry(n->member.next, typeof(*n), member)) - -/** - * list_for_each_entry_safe_continue - * @pos: the type * to use as a loop cursor. - * @n: another type * to use as temporary storage - * @head: the head for your list. - * @member: the name of the list_struct within the struct. - * - * Iterate over list of given type, continuing after current point, - * safe against removal of list entry. - */ -#define list_for_each_entry_safe_continue(pos, n, head, member) \ - for (pos = list_entry(pos->member.next, typeof(*pos), member), \ - n = list_entry(pos->member.next, typeof(*pos), member); \ - &pos->member != (head); \ - pos = n, n = list_entry(n->member.next, typeof(*n), member)) - -/** - * list_for_each_entry_safe_from - * @pos: the type * to use as a loop cursor. - * @n: another type * to use as temporary storage - * @head: the head for your list. - * @member: the name of the list_struct within the struct. - * - * Iterate over list of given type from current point, safe against - * removal of list entry. - */ -#define list_for_each_entry_safe_from(pos, n, head, member) \ - for (n = list_entry(pos->member.next, typeof(*pos), member); \ - &pos->member != (head); \ - pos = n, n = list_entry(n->member.next, typeof(*n), member)) - -/** - * list_for_each_entry_safe_reverse - * @pos: the type * to use as a loop cursor. - * @n: another type * to use as temporary storage - * @head: the head for your list. - * @member: the name of the list_struct within the struct. - * - * Iterate backwards over list of given type, safe against removal - * of list entry. - */ -#define list_for_each_entry_safe_reverse(pos, n, head, member) \ - for (pos = list_entry((head)->prev, typeof(*pos), member), \ - n = list_entry(pos->member.prev, typeof(*pos), member); \ - &pos->member != (head); \ - pos = n, n = list_entry(n->member.prev, typeof(*n), member)) - -/* - * Double linked lists with a single pointer list head. - * Mostly useful for hash tables where the two pointer list head is - * too wasteful. - * You lose the ability to access the tail in O(1). - */ - -struct hlist_head { - struct hlist_node *first; -}; - -struct hlist_node { - struct hlist_node *next, **pprev; -}; - -#define HLIST_HEAD_INIT { .first = NULL } -#define HLIST_HEAD(name) struct hlist_head name = { .first = NULL } -#define INIT_HLIST_HEAD(ptr) ((ptr)->first = NULL) -static inline void INIT_HLIST_NODE(struct hlist_node *h) -{ - h->next = NULL; - h->pprev = NULL; -} - -static inline int hlist_unhashed(const struct hlist_node *h) -{ - return !h->pprev; -} - -static inline int hlist_empty(const struct hlist_head *h) -{ - return !h->first; -} - -static inline void __hlist_del(struct hlist_node *n) -{ - struct hlist_node *next = n->next; - struct hlist_node **pprev = n->pprev; - *pprev = next; - if (next) - next->pprev = pprev; -} - -static inline void hlist_del(struct hlist_node *n) -{ - __hlist_del(n); - n->next = NULL; - n->pprev = NULL; -} - -static inline void hlist_del_init(struct hlist_node *n) -{ - if (!hlist_unhashed(n)) { - __hlist_del(n); - INIT_HLIST_NODE(n); - } -} - - -static inline void hlist_add_head(struct hlist_node *n, struct hlist_head *h) -{ - struct hlist_node *first = h->first; - n->next = first; - if (first) - first->pprev = &n->next; - h->first = n; - n->pprev = &h->first; -} - - -/* next must be != NULL */ -static inline void hlist_add_before(struct hlist_node *n, - struct hlist_node *next) -{ - n->pprev = next->pprev; - n->next = next; - next->pprev = &n->next; - *(n->pprev) = n; -} - -static inline void hlist_add_after(struct hlist_node *n, - struct hlist_node *next) -{ - next->next = n->next; - n->next = next; - next->pprev = &n->next; - - if(next->next) - next->next->pprev = &next->next; -} - -#define hlist_entry(ptr, type, member) container_of(ptr,type,member) - -#define hlist_for_each(pos, head) \ - for (pos = (head)->first; pos; pos = pos->next) - -#define hlist_for_each_safe(pos, n, head) \ - for (pos = (head)->first; pos; pos = n) - -/** - * hlist_for_each_entry - iterate over list of given type - * @tpos: the type * to use as a loop cursor. - * @pos: the &struct hlist_node to use as a loop cursor. - * @head: the head for your list. - * @member: the name of the hlist_node within the struct. - */ -#define hlist_for_each_entry(tpos, pos, head, member) \ - for (pos = (head)->first; pos && \ - ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \ - pos = pos->next) - -/** - * hlist_for_each_entry_continue - iterate over a hlist continuing after current point - * @tpos: the type * to use as a loop cursor. - * @pos: the &struct hlist_node to use as a loop cursor. - * @member: the name of the hlist_node within the struct. - */ -#define hlist_for_each_entry_continue(tpos, pos, member) \ - for (pos = (pos)->next; pos && \ - ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \ - pos = pos->next) - -/** - * hlist_for_each_entry_from - iterate over a hlist continuing from current point - * @tpos: the type * to use as a loop cursor. - * @pos: the &struct hlist_node to use as a loop cursor. - * @member: the name of the hlist_node within the struct. - */ -#define hlist_for_each_entry_from(tpos, pos, member) \ - for (; pos && \ - ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \ - pos = pos->next) - -/** - * hlist_for_each_entry_safe - iterate over list of given type safe against removal of list entry - * @tpos: the type * to use as a loop cursor. - * @pos: the &struct hlist_node to use as a loop cursor. - * @n: another &struct hlist_node to use as temporary storage - * @head: the head for your list. - * @member: the name of the hlist_node within the struct. - */ -#define hlist_for_each_entry_safe(tpos, pos, n, head, member) \ - for (pos = (head)->first; \ - pos && ({ n = pos->next; 1; }) && \ - ({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \ - pos = n) - -#endif |