Windows: first shot at oio_timeout support
This commit is contained in:
Bert Belder
parent
abcfcd5573
commit
34f69db83a
@ -93,6 +93,7 @@
|
||||
<ClInclude Include="ngx-queue.h" />
|
||||
<ClInclude Include="oio-win.h" />
|
||||
<ClInclude Include="oio.h" />
|
||||
<ClInclude Include="tree.h" />
|
||||
</ItemGroup>
|
||||
<ItemGroup>
|
||||
<ClCompile Include="oio-win.c" />
|
||||
|
||||
112
oio-win.c
112
oio-win.c
@ -1,9 +1,12 @@
|
||||
|
||||
#include "oio.h"
|
||||
#include <assert.h>
|
||||
#include <errno.h>
|
||||
#include <malloc.h>
|
||||
#include <stdio.h>
|
||||
|
||||
#include "oio.h"
|
||||
#include "tree.h"
|
||||
|
||||
|
||||
/*
|
||||
* Guids and typedefs for winsock extension functions
|
||||
@ -107,6 +110,20 @@ typedef struct oio_accept_req_s {
|
||||
} oio_accept_req;
|
||||
|
||||
|
||||
/* Binary tree used to keep the list of timers sorted. */
|
||||
int oio_timer_compare(oio_req* t1, oio_req* t2);
|
||||
RB_HEAD(oio_timer_s, oio_req_s);
|
||||
RB_PROTOTYPE(oio_timer_s, oio_req_s, tree_entry, oio_timer_compare);
|
||||
|
||||
/* The head of the timers tree */
|
||||
static struct oio_timer_s oio_timers_ = RB_INITIALIZER(oio_timers_);
|
||||
|
||||
|
||||
/* The current time according to the event loop. in msecs. */
|
||||
int64_t oio_now_ = 0;
|
||||
int64_t oio_ticks_per_msec_ = 0;
|
||||
|
||||
|
||||
/*
|
||||
* Global I/O completion port
|
||||
*/
|
||||
@ -191,6 +208,7 @@ void oio_init() {
|
||||
|
||||
WSADATA wsa_data;
|
||||
int errorno;
|
||||
LARGE_INTEGER timer_frequency;
|
||||
SOCKET dummy;
|
||||
|
||||
/* Initialize winsock */
|
||||
@ -223,6 +241,13 @@ void oio_init() {
|
||||
if (oio_iocp_ == NULL) {
|
||||
oio_fatal_error(GetLastError(), "CreateIoCompletionPort");
|
||||
}
|
||||
|
||||
/* Initialize the event loop time */
|
||||
if (!QueryPerformanceFrequency(&timer_frequency))
|
||||
oio_fatal_error(GetLastError(), "QueryPerformanceFrequency");
|
||||
oio_ticks_per_msec_ = timer_frequency.QuadPart / 1000;
|
||||
|
||||
oio_update_time();
|
||||
}
|
||||
|
||||
|
||||
@ -598,6 +623,53 @@ oio_err oio_last_error() {
|
||||
}
|
||||
|
||||
|
||||
static int oio_timer_compare(oio_req *a, oio_req* b) {
|
||||
if (a->due < b->due)
|
||||
return -1;
|
||||
if (a->due > b->due)
|
||||
return 1;
|
||||
if ((intptr_t)a < (intptr_t)b)
|
||||
return -1;
|
||||
if ((intptr_t)a > (intptr_t)b)
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
RB_GENERATE_STATIC(oio_timer_s, oio_req_s, tree_entry, oio_timer_compare);
|
||||
|
||||
|
||||
int oio_timeout(oio_req* req, int64_t timeout) {
|
||||
assert(!(req->flags & OIO_REQ_PENDING));
|
||||
|
||||
req->type = OIO_TIMEOUT;
|
||||
|
||||
req->due = oio_now_ + timeout;
|
||||
if (RB_INSERT(oio_timer_s, &oio_timers_, req) != NULL) {
|
||||
oio_errno_ = EINVAL;
|
||||
return -1;
|
||||
}
|
||||
|
||||
req->flags |= OIO_REQ_PENDING;
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
void oio_update_time() {
|
||||
LARGE_INTEGER counter;
|
||||
|
||||
if (!QueryPerformanceCounter(&counter))
|
||||
oio_fatal_error(GetLastError(), "QueryPerformanceCounter");
|
||||
|
||||
oio_now_ = counter.QuadPart / oio_ticks_per_msec_;
|
||||
}
|
||||
|
||||
|
||||
int64_t oio_now() {
|
||||
return oio_now_;
|
||||
}
|
||||
|
||||
|
||||
void oio_poll() {
|
||||
BOOL success;
|
||||
DWORD bytes;
|
||||
@ -606,15 +678,49 @@ void oio_poll() {
|
||||
oio_req* req;
|
||||
oio_accept_req *accept_req;
|
||||
oio_handle* handle;
|
||||
DWORD timeout;
|
||||
int64_t delta;
|
||||
|
||||
oio_update_time();
|
||||
|
||||
/* Check if there are any running timers */
|
||||
req = RB_MIN(oio_timer_s, &oio_timers_);
|
||||
if (req) {
|
||||
delta = req->due - oio_now_;
|
||||
if (delta >= UINT_MAX) {
|
||||
/* Can't have a timeout greater than UINT_MAX, and a timeout value of */
|
||||
/* UINT_MAX means infinite, so that's no good either. */
|
||||
timeout = UINT_MAX - 1;
|
||||
} else if (delta < 0) {
|
||||
/* Negative timeout values are not allowed */
|
||||
timeout = 0;
|
||||
} else {
|
||||
timeout = (DWORD)delta;
|
||||
}
|
||||
} else {
|
||||
/* No timers */
|
||||
timeout = INFINITE;
|
||||
}
|
||||
|
||||
success = GetQueuedCompletionStatus(oio_iocp_,
|
||||
&bytes,
|
||||
&key,
|
||||
&overlapped,
|
||||
INFINITE);
|
||||
timeout);
|
||||
|
||||
/* Call timer callbacks */
|
||||
oio_update_time();
|
||||
for (req = RB_MIN(oio_timer_s, &oio_timers_);
|
||||
req != NULL && req->due <= oio_now_;
|
||||
req = RB_MIN(oio_timer_s, &oio_timers_)) {
|
||||
RB_REMOVE(oio_timer_s, &oio_timers_, req);
|
||||
req->flags &= ~OIO_REQ_PENDING;
|
||||
((oio_timer_cb)req->cb)(req, req->due - oio_now_);
|
||||
}
|
||||
|
||||
/* Quit if there were no io requests dequeued. */
|
||||
if (!success && !overlapped)
|
||||
oio_fatal_error(GetLastError(), "GetQueuedCompletionStatus");
|
||||
return;
|
||||
|
||||
req = oio_overlapped_to_req(overlapped);
|
||||
handle = req->handle;
|
||||
|
||||
13
oio-win.h
13
oio-win.h
@ -1,9 +1,12 @@
|
||||
|
||||
#include <stdint.h>
|
||||
#include <winsock2.h>
|
||||
#include <mswsock.h>
|
||||
#include <ws2tcpip.h>
|
||||
#include <windows.h>
|
||||
|
||||
#include "tree.h"
|
||||
|
||||
|
||||
/**
|
||||
* It should be possible to cast oio_buf[] to WSABUF[]
|
||||
@ -15,7 +18,15 @@ typedef struct oio_buf {
|
||||
} oio_buf;
|
||||
|
||||
struct oio_req_private_s {
|
||||
OVERLAPPED overlapped;
|
||||
union {
|
||||
/* Used by I/O operations */
|
||||
OVERLAPPED overlapped;
|
||||
/* Used by timers */
|
||||
struct {
|
||||
RB_ENTRY(oio_req_s) tree_entry;
|
||||
int64_t due;
|
||||
};
|
||||
};
|
||||
int flags;
|
||||
};
|
||||
|
||||
|
||||
12
oio.h
12
oio.h
@ -1,6 +1,7 @@
|
||||
#ifndef OIO_H
|
||||
#define OIO_H
|
||||
|
||||
#include <stdint.h> /* int64_t */
|
||||
#include <stddef.h> /* size_t */
|
||||
|
||||
|
||||
@ -9,12 +10,14 @@ typedef int oio_err; /* FIXME */
|
||||
typedef struct oio_req_s oio_req;
|
||||
typedef struct oio_handle_s oio_handle;
|
||||
|
||||
/* TODO: tell the callback if the request was completed or cancelled */
|
||||
typedef void (*oio_read_cb)(oio_req* req, size_t nread);
|
||||
typedef void (*oio_write_cb)(oio_req* req);
|
||||
typedef void (*oio_accept_cb)(oio_handle* handle);
|
||||
typedef void (*oio_close_cb)(oio_handle* handle, oio_err e);
|
||||
typedef void (*oio_connect_cb)(oio_req* req, oio_err e);
|
||||
typedef void (*oio_shutdown_cb)(oio_req* req);
|
||||
typedef void (*oio_timer_cb)(oio_req* req, int64_t skew);
|
||||
|
||||
|
||||
#if defined(__unix__) || defined(__POSIX__) || defined(__APPLE__)
|
||||
@ -39,7 +42,8 @@ typedef enum {
|
||||
OIO_READ,
|
||||
OIO_WRITE,
|
||||
OIO_SHUTDOWN,
|
||||
OIO_CLOSE
|
||||
OIO_CLOSE,
|
||||
OIO_TIMEOUT
|
||||
} oio_req_type;
|
||||
|
||||
|
||||
@ -77,6 +81,9 @@ const char* oio_err_str(oio_err err);
|
||||
void oio_init();
|
||||
int oio_run();
|
||||
|
||||
void oio_update_time();
|
||||
int64_t oio_now();
|
||||
|
||||
void oio_req_init(oio_req* req, oio_handle* handle, void* cb);
|
||||
|
||||
/*
|
||||
@ -103,6 +110,9 @@ int oio_read(oio_req* req, oio_buf* bufs, int bufcnt);
|
||||
int oio_write(oio_req* req, oio_buf* bufs, int bufcnt);
|
||||
int oio_write2(oio_req *req, const char* msg);
|
||||
|
||||
/* Timer methods */
|
||||
int oio_timeout(oio_req *req, int64_t timeout);
|
||||
|
||||
/* Request handle to be closed. close_cb will be called */
|
||||
/* asynchronously after this call. */
|
||||
int oio_close(oio_handle* handle);
|
||||
|
||||
762
tree.h
Normal file
762
tree.h
Normal file
@ -0,0 +1,762 @@
|
||||
/*-
|
||||
* Copyright 2002 Niels Provos <provos@citi.umich.edu>
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
||||
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
||||
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
||||
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#ifndef _OIO_TREE_H_
|
||||
#define _OIO_TREE_H_
|
||||
|
||||
#define __unused
|
||||
|
||||
/*
|
||||
* This file defines data structures for different types of trees:
|
||||
* splay trees and red-black trees.
|
||||
*
|
||||
* A splay tree is a self-organizing data structure. Every operation
|
||||
* on the tree causes a splay to happen. The splay moves the requested
|
||||
* node to the root of the tree and partly rebalances it.
|
||||
*
|
||||
* This has the benefit that request locality causes faster lookups as
|
||||
* the requested nodes move to the top of the tree. On the other hand,
|
||||
* every lookup causes memory writes.
|
||||
*
|
||||
* The Balance Theorem bounds the total access time for m operations
|
||||
* and n inserts on an initially empty tree as O((m + n)lg n). The
|
||||
* amortized cost for a sequence of m accesses to a splay tree is O(lg n);
|
||||
*
|
||||
* A red-black tree is a binary search tree with the node color as an
|
||||
* extra attribute. It fulfills a set of conditions:
|
||||
* - every search path from the root to a leaf consists of the
|
||||
* same number of black nodes,
|
||||
* - each red node (except for the root) has a black parent,
|
||||
* - each leaf node is black.
|
||||
*
|
||||
* Every operation on a red-black tree is bounded as O(lg n).
|
||||
* The maximum height of a red-black tree is 2lg (n+1).
|
||||
*/
|
||||
|
||||
#define SPLAY_HEAD(name, type) \
|
||||
struct name { \
|
||||
struct type *sph_root; /* root of the tree */ \
|
||||
}
|
||||
|
||||
#define SPLAY_INITIALIZER(root) \
|
||||
{ NULL }
|
||||
|
||||
#define SPLAY_INIT(root) do { \
|
||||
(root)->sph_root = NULL; \
|
||||
} while (/*CONSTCOND*/ 0)
|
||||
|
||||
#define SPLAY_ENTRY(type) \
|
||||
struct { \
|
||||
struct type *spe_left; /* left element */ \
|
||||
struct type *spe_right; /* right element */ \
|
||||
}
|
||||
|
||||
#define SPLAY_LEFT(elm, field) (elm)->field.spe_left
|
||||
#define SPLAY_RIGHT(elm, field) (elm)->field.spe_right
|
||||
#define SPLAY_ROOT(head) (head)->sph_root
|
||||
#define SPLAY_EMPTY(head) (SPLAY_ROOT(head) == NULL)
|
||||
|
||||
/* SPLAY_ROTATE_{LEFT,RIGHT} expect that tmp hold SPLAY_{RIGHT,LEFT} */
|
||||
#define SPLAY_ROTATE_RIGHT(head, tmp, field) do { \
|
||||
SPLAY_LEFT((head)->sph_root, field) = SPLAY_RIGHT(tmp, field); \
|
||||
SPLAY_RIGHT(tmp, field) = (head)->sph_root; \
|
||||
(head)->sph_root = tmp; \
|
||||
} while (/*CONSTCOND*/ 0)
|
||||
|
||||
#define SPLAY_ROTATE_LEFT(head, tmp, field) do { \
|
||||
SPLAY_RIGHT((head)->sph_root, field) = SPLAY_LEFT(tmp, field); \
|
||||
SPLAY_LEFT(tmp, field) = (head)->sph_root; \
|
||||
(head)->sph_root = tmp; \
|
||||
} while (/*CONSTCOND*/ 0)
|
||||
|
||||
#define SPLAY_LINKLEFT(head, tmp, field) do { \
|
||||
SPLAY_LEFT(tmp, field) = (head)->sph_root; \
|
||||
tmp = (head)->sph_root; \
|
||||
(head)->sph_root = SPLAY_LEFT((head)->sph_root, field); \
|
||||
} while (/*CONSTCOND*/ 0)
|
||||
|
||||
#define SPLAY_LINKRIGHT(head, tmp, field) do { \
|
||||
SPLAY_RIGHT(tmp, field) = (head)->sph_root; \
|
||||
tmp = (head)->sph_root; \
|
||||
(head)->sph_root = SPLAY_RIGHT((head)->sph_root, field); \
|
||||
} while (/*CONSTCOND*/ 0)
|
||||
|
||||
#define SPLAY_ASSEMBLE(head, node, left, right, field) do { \
|
||||
SPLAY_RIGHT(left, field) = SPLAY_LEFT((head)->sph_root, field); \
|
||||
SPLAY_LEFT(right, field) = SPLAY_RIGHT((head)->sph_root, field); \
|
||||
SPLAY_LEFT((head)->sph_root, field) = SPLAY_RIGHT(node, field); \
|
||||
SPLAY_RIGHT((head)->sph_root, field) = SPLAY_LEFT(node, field); \
|
||||
} while (/*CONSTCOND*/ 0)
|
||||
|
||||
/* Generates prototypes and inline functions */
|
||||
|
||||
#define SPLAY_PROTOTYPE(name, type, field, cmp) \
|
||||
void name##_SPLAY(struct name *, struct type *); \
|
||||
void name##_SPLAY_MINMAX(struct name *, int); \
|
||||
struct type *name##_SPLAY_INSERT(struct name *, struct type *); \
|
||||
struct type *name##_SPLAY_REMOVE(struct name *, struct type *); \
|
||||
\
|
||||
/* Finds the node with the same key as elm */ \
|
||||
static __inline struct type * \
|
||||
name##_SPLAY_FIND(struct name *head, struct type *elm) \
|
||||
{ \
|
||||
if (SPLAY_EMPTY(head)) \
|
||||
return(NULL); \
|
||||
name##_SPLAY(head, elm); \
|
||||
if ((cmp)(elm, (head)->sph_root) == 0) \
|
||||
return (head->sph_root); \
|
||||
return (NULL); \
|
||||
} \
|
||||
\
|
||||
static __inline struct type * \
|
||||
name##_SPLAY_NEXT(struct name *head, struct type *elm) \
|
||||
{ \
|
||||
name##_SPLAY(head, elm); \
|
||||
if (SPLAY_RIGHT(elm, field) != NULL) { \
|
||||
elm = SPLAY_RIGHT(elm, field); \
|
||||
while (SPLAY_LEFT(elm, field) != NULL) { \
|
||||
elm = SPLAY_LEFT(elm, field); \
|
||||
} \
|
||||
} else \
|
||||
elm = NULL; \
|
||||
return (elm); \
|
||||
} \
|
||||
\
|
||||
static __inline struct type * \
|
||||
name##_SPLAY_MIN_MAX(struct name *head, int val) \
|
||||
{ \
|
||||
name##_SPLAY_MINMAX(head, val); \
|
||||
return (SPLAY_ROOT(head)); \
|
||||
}
|
||||
|
||||
/* Main splay operation.
|
||||
* Moves node close to the key of elm to top
|
||||
*/
|
||||
#define SPLAY_GENERATE(name, type, field, cmp) \
|
||||
struct type * \
|
||||
name##_SPLAY_INSERT(struct name *head, struct type *elm) \
|
||||
{ \
|
||||
if (SPLAY_EMPTY(head)) { \
|
||||
SPLAY_LEFT(elm, field) = SPLAY_RIGHT(elm, field) = NULL; \
|
||||
} else { \
|
||||
int __comp; \
|
||||
name##_SPLAY(head, elm); \
|
||||
__comp = (cmp)(elm, (head)->sph_root); \
|
||||
if(__comp < 0) { \
|
||||
SPLAY_LEFT(elm, field) = SPLAY_LEFT((head)->sph_root, field); \
|
||||
SPLAY_RIGHT(elm, field) = (head)->sph_root; \
|
||||
SPLAY_LEFT((head)->sph_root, field) = NULL; \
|
||||
} else if (__comp > 0) { \
|
||||
SPLAY_RIGHT(elm, field) = SPLAY_RIGHT((head)->sph_root, field); \
|
||||
SPLAY_LEFT(elm, field) = (head)->sph_root; \
|
||||
SPLAY_RIGHT((head)->sph_root, field) = NULL; \
|
||||
} else \
|
||||
return ((head)->sph_root); \
|
||||
} \
|
||||
(head)->sph_root = (elm); \
|
||||
return (NULL); \
|
||||
} \
|
||||
\
|
||||
struct type * \
|
||||
name##_SPLAY_REMOVE(struct name *head, struct type *elm) \
|
||||
{ \
|
||||
struct type *__tmp; \
|
||||
if (SPLAY_EMPTY(head)) \
|
||||
return (NULL); \
|
||||
name##_SPLAY(head, elm); \
|
||||
if ((cmp)(elm, (head)->sph_root) == 0) { \
|
||||
if (SPLAY_LEFT((head)->sph_root, field) == NULL) { \
|
||||
(head)->sph_root = SPLAY_RIGHT((head)->sph_root, field); \
|
||||
} else { \
|
||||
__tmp = SPLAY_RIGHT((head)->sph_root, field); \
|
||||
(head)->sph_root = SPLAY_LEFT((head)->sph_root, field); \
|
||||
name##_SPLAY(head, elm); \
|
||||
SPLAY_RIGHT((head)->sph_root, field) = __tmp; \
|
||||
} \
|
||||
return (elm); \
|
||||
} \
|
||||
return (NULL); \
|
||||
} \
|
||||
\
|
||||
void \
|
||||
name##_SPLAY(struct name *head, struct type *elm) \
|
||||
{ \
|
||||
struct type __node, *__left, *__right, *__tmp; \
|
||||
int __comp; \
|
||||
\
|
||||
SPLAY_LEFT(&__node, field) = SPLAY_RIGHT(&__node, field) = NULL; \
|
||||
__left = __right = &__node; \
|
||||
\
|
||||
while ((__comp = (cmp)(elm, (head)->sph_root)) != 0) { \
|
||||
if (__comp < 0) { \
|
||||
__tmp = SPLAY_LEFT((head)->sph_root, field); \
|
||||
if (__tmp == NULL) \
|
||||
break; \
|
||||
if ((cmp)(elm, __tmp) < 0){ \
|
||||
SPLAY_ROTATE_RIGHT(head, __tmp, field); \
|
||||
if (SPLAY_LEFT((head)->sph_root, field) == NULL) \
|
||||
break; \
|
||||
} \
|
||||
SPLAY_LINKLEFT(head, __right, field); \
|
||||
} else if (__comp > 0) { \
|
||||
__tmp = SPLAY_RIGHT((head)->sph_root, field); \
|
||||
if (__tmp == NULL) \
|
||||
break; \
|
||||
if ((cmp)(elm, __tmp) > 0){ \
|
||||
SPLAY_ROTATE_LEFT(head, __tmp, field); \
|
||||
if (SPLAY_RIGHT((head)->sph_root, field) == NULL) \
|
||||
break; \
|
||||
} \
|
||||
SPLAY_LINKRIGHT(head, __left, field); \
|
||||
} \
|
||||
} \
|
||||
SPLAY_ASSEMBLE(head, &__node, __left, __right, field); \
|
||||
} \
|
||||
\
|
||||
/* Splay with either the minimum or the maximum element \
|
||||
* Used to find minimum or maximum element in tree. \
|
||||
*/ \
|
||||
void name##_SPLAY_MINMAX(struct name *head, int __comp) \
|
||||
{ \
|
||||
struct type __node, *__left, *__right, *__tmp; \
|
||||
\
|
||||
SPLAY_LEFT(&__node, field) = SPLAY_RIGHT(&__node, field) = NULL; \
|
||||
__left = __right = &__node; \
|
||||
\
|
||||
while (1) { \
|
||||
if (__comp < 0) { \
|
||||
__tmp = SPLAY_LEFT((head)->sph_root, field); \
|
||||
if (__tmp == NULL) \
|
||||
break; \
|
||||
if (__comp < 0){ \
|
||||
SPLAY_ROTATE_RIGHT(head, __tmp, field); \
|
||||
if (SPLAY_LEFT((head)->sph_root, field) == NULL) \
|
||||
break; \
|
||||
} \
|
||||
SPLAY_LINKLEFT(head, __right, field); \
|
||||
} else if (__comp > 0) { \
|
||||
__tmp = SPLAY_RIGHT((head)->sph_root, field); \
|
||||
if (__tmp == NULL) \
|
||||
break; \
|
||||
if (__comp > 0) { \
|
||||
SPLAY_ROTATE_LEFT(head, __tmp, field); \
|
||||
if (SPLAY_RIGHT((head)->sph_root, field) == NULL) \
|
||||
break; \
|
||||
} \
|
||||
SPLAY_LINKRIGHT(head, __left, field); \
|
||||
} \
|
||||
} \
|
||||
SPLAY_ASSEMBLE(head, &__node, __left, __right, field); \
|
||||
}
|
||||
|
||||
#define SPLAY_NEGINF -1
|
||||
#define SPLAY_INF 1
|
||||
|
||||
#define SPLAY_INSERT(name, x, y) name##_SPLAY_INSERT(x, y)
|
||||
#define SPLAY_REMOVE(name, x, y) name##_SPLAY_REMOVE(x, y)
|
||||
#define SPLAY_FIND(name, x, y) name##_SPLAY_FIND(x, y)
|
||||
#define SPLAY_NEXT(name, x, y) name##_SPLAY_NEXT(x, y)
|
||||
#define SPLAY_MIN(name, x) (SPLAY_EMPTY(x) ? NULL \
|
||||
: name##_SPLAY_MIN_MAX(x, SPLAY_NEGINF))
|
||||
#define SPLAY_MAX(name, x) (SPLAY_EMPTY(x) ? NULL \
|
||||
: name##_SPLAY_MIN_MAX(x, SPLAY_INF))
|
||||
|
||||
#define SPLAY_FOREACH(x, name, head) \
|
||||
for ((x) = SPLAY_MIN(name, head); \
|
||||
(x) != NULL; \
|
||||
(x) = SPLAY_NEXT(name, head, x))
|
||||
|
||||
/* Macros that define a red-black tree */
|
||||
#define RB_HEAD(name, type) \
|
||||
struct name { \
|
||||
struct type *rbh_root; /* root of the tree */ \
|
||||
}
|
||||
|
||||
#define RB_INITIALIZER(root) \
|
||||
{ NULL }
|
||||
|
||||
#define RB_INIT(root) do { \
|
||||
(root)->rbh_root = NULL; \
|
||||
} while (/*CONSTCOND*/ 0)
|
||||
|
||||
#define RB_BLACK 0
|
||||
#define RB_RED 1
|
||||
#define RB_ENTRY(type) \
|
||||
struct { \
|
||||
struct type *rbe_left; /* left element */ \
|
||||
struct type *rbe_right; /* right element */ \
|
||||
struct type *rbe_parent; /* parent element */ \
|
||||
int rbe_color; /* node color */ \
|
||||
}
|
||||
|
||||
#define RB_LEFT(elm, field) (elm)->field.rbe_left
|
||||
#define RB_RIGHT(elm, field) (elm)->field.rbe_right
|
||||
#define RB_PARENT(elm, field) (elm)->field.rbe_parent
|
||||
#define RB_COLOR(elm, field) (elm)->field.rbe_color
|
||||
#define RB_ROOT(head) (head)->rbh_root
|
||||
#define RB_EMPTY(head) (RB_ROOT(head) == NULL)
|
||||
|
||||
#define RB_SET(elm, parent, field) do { \
|
||||
RB_PARENT(elm, field) = parent; \
|
||||
RB_LEFT(elm, field) = RB_RIGHT(elm, field) = NULL; \
|
||||
RB_COLOR(elm, field) = RB_RED; \
|
||||
} while (/*CONSTCOND*/ 0)
|
||||
|
||||
#define RB_SET_BLACKRED(black, red, field) do { \
|
||||
RB_COLOR(black, field) = RB_BLACK; \
|
||||
RB_COLOR(red, field) = RB_RED; \
|
||||
} while (/*CONSTCOND*/ 0)
|
||||
|
||||
#ifndef RB_AUGMENT
|
||||
#define RB_AUGMENT(x) do {} while (0)
|
||||
#endif
|
||||
|
||||
#define RB_ROTATE_LEFT(head, elm, tmp, field) do { \
|
||||
(tmp) = RB_RIGHT(elm, field); \
|
||||
if ((RB_RIGHT(elm, field) = RB_LEFT(tmp, field)) != NULL) { \
|
||||
RB_PARENT(RB_LEFT(tmp, field), field) = (elm); \
|
||||
} \
|
||||
RB_AUGMENT(elm); \
|
||||
if ((RB_PARENT(tmp, field) = RB_PARENT(elm, field)) != NULL) { \
|
||||
if ((elm) == RB_LEFT(RB_PARENT(elm, field), field)) \
|
||||
RB_LEFT(RB_PARENT(elm, field), field) = (tmp); \
|
||||
else \
|
||||
RB_RIGHT(RB_PARENT(elm, field), field) = (tmp); \
|
||||
} else \
|
||||
(head)->rbh_root = (tmp); \
|
||||
RB_LEFT(tmp, field) = (elm); \
|
||||
RB_PARENT(elm, field) = (tmp); \
|
||||
RB_AUGMENT(tmp); \
|
||||
if ((RB_PARENT(tmp, field))) \
|
||||
RB_AUGMENT(RB_PARENT(tmp, field)); \
|
||||
} while (/*CONSTCOND*/ 0)
|
||||
|
||||
#define RB_ROTATE_RIGHT(head, elm, tmp, field) do { \
|
||||
(tmp) = RB_LEFT(elm, field); \
|
||||
if ((RB_LEFT(elm, field) = RB_RIGHT(tmp, field)) != NULL) { \
|
||||
RB_PARENT(RB_RIGHT(tmp, field), field) = (elm); \
|
||||
} \
|
||||
RB_AUGMENT(elm); \
|
||||
if ((RB_PARENT(tmp, field) = RB_PARENT(elm, field)) != NULL) { \
|
||||
if ((elm) == RB_LEFT(RB_PARENT(elm, field), field)) \
|
||||
RB_LEFT(RB_PARENT(elm, field), field) = (tmp); \
|
||||
else \
|
||||
RB_RIGHT(RB_PARENT(elm, field), field) = (tmp); \
|
||||
} else \
|
||||
(head)->rbh_root = (tmp); \
|
||||
RB_RIGHT(tmp, field) = (elm); \
|
||||
RB_PARENT(elm, field) = (tmp); \
|
||||
RB_AUGMENT(tmp); \
|
||||
if ((RB_PARENT(tmp, field))) \
|
||||
RB_AUGMENT(RB_PARENT(tmp, field)); \
|
||||
} while (/*CONSTCOND*/ 0)
|
||||
|
||||
/* Generates prototypes and inline functions */
|
||||
#define RB_PROTOTYPE(name, type, field, cmp) \
|
||||
RB_PROTOTYPE_INTERNAL(name, type, field, cmp,)
|
||||
#define RB_PROTOTYPE_STATIC(name, type, field, cmp) \
|
||||
RB_PROTOTYPE_INTERNAL(name, type, field, cmp, __unused static)
|
||||
#define RB_PROTOTYPE_INTERNAL(name, type, field, cmp, attr) \
|
||||
attr void name##_RB_INSERT_COLOR(struct name *, struct type *); \
|
||||
attr void name##_RB_REMOVE_COLOR(struct name *, struct type *, struct type *);\
|
||||
attr struct type *name##_RB_REMOVE(struct name *, struct type *); \
|
||||
attr struct type *name##_RB_INSERT(struct name *, struct type *); \
|
||||
attr struct type *name##_RB_FIND(struct name *, struct type *); \
|
||||
attr struct type *name##_RB_NFIND(struct name *, struct type *); \
|
||||
attr struct type *name##_RB_NEXT(struct type *); \
|
||||
attr struct type *name##_RB_PREV(struct type *); \
|
||||
attr struct type *name##_RB_MINMAX(struct name *, int); \
|
||||
\
|
||||
|
||||
/* Main rb operation.
|
||||
* Moves node close to the key of elm to top
|
||||
*/
|
||||
#define RB_GENERATE(name, type, field, cmp) \
|
||||
RB_GENERATE_INTERNAL(name, type, field, cmp,)
|
||||
#define RB_GENERATE_STATIC(name, type, field, cmp) \
|
||||
RB_GENERATE_INTERNAL(name, type, field, cmp, __unused static)
|
||||
#define RB_GENERATE_INTERNAL(name, type, field, cmp, attr) \
|
||||
attr void \
|
||||
name##_RB_INSERT_COLOR(struct name *head, struct type *elm) \
|
||||
{ \
|
||||
struct type *parent, *gparent, *tmp; \
|
||||
while ((parent = RB_PARENT(elm, field)) != NULL && \
|
||||
RB_COLOR(parent, field) == RB_RED) { \
|
||||
gparent = RB_PARENT(parent, field); \
|
||||
if (parent == RB_LEFT(gparent, field)) { \
|
||||
tmp = RB_RIGHT(gparent, field); \
|
||||
if (tmp && RB_COLOR(tmp, field) == RB_RED) { \
|
||||
RB_COLOR(tmp, field) = RB_BLACK; \
|
||||
RB_SET_BLACKRED(parent, gparent, field); \
|
||||
elm = gparent; \
|
||||
continue; \
|
||||
} \
|
||||
if (RB_RIGHT(parent, field) == elm) { \
|
||||
RB_ROTATE_LEFT(head, parent, tmp, field); \
|
||||
tmp = parent; \
|
||||
parent = elm; \
|
||||
elm = tmp; \
|
||||
} \
|
||||
RB_SET_BLACKRED(parent, gparent, field); \
|
||||
RB_ROTATE_RIGHT(head, gparent, tmp, field); \
|
||||
} else { \
|
||||
tmp = RB_LEFT(gparent, field); \
|
||||
if (tmp && RB_COLOR(tmp, field) == RB_RED) { \
|
||||
RB_COLOR(tmp, field) = RB_BLACK; \
|
||||
RB_SET_BLACKRED(parent, gparent, field); \
|
||||
elm = gparent; \
|
||||
continue; \
|
||||
} \
|
||||
if (RB_LEFT(parent, field) == elm) { \
|
||||
RB_ROTATE_RIGHT(head, parent, tmp, field); \
|
||||
tmp = parent; \
|
||||
parent = elm; \
|
||||
elm = tmp; \
|
||||
} \
|
||||
RB_SET_BLACKRED(parent, gparent, field); \
|
||||
RB_ROTATE_LEFT(head, gparent, tmp, field); \
|
||||
} \
|
||||
} \
|
||||
RB_COLOR(head->rbh_root, field) = RB_BLACK; \
|
||||
} \
|
||||
\
|
||||
attr void \
|
||||
name##_RB_REMOVE_COLOR(struct name *head, struct type *parent, \
|
||||
struct type *elm) \
|
||||
{ \
|
||||
struct type *tmp; \
|
||||
while ((elm == NULL || RB_COLOR(elm, field) == RB_BLACK) && \
|
||||
elm != RB_ROOT(head)) { \
|
||||
if (RB_LEFT(parent, field) == elm) { \
|
||||
tmp = RB_RIGHT(parent, field); \
|
||||
if (RB_COLOR(tmp, field) == RB_RED) { \
|
||||
RB_SET_BLACKRED(tmp, parent, field); \
|
||||
RB_ROTATE_LEFT(head, parent, tmp, field); \
|
||||
tmp = RB_RIGHT(parent, field); \
|
||||
} \
|
||||
if ((RB_LEFT(tmp, field) == NULL || \
|
||||
RB_COLOR(RB_LEFT(tmp, field), field) == RB_BLACK) && \
|
||||
(RB_RIGHT(tmp, field) == NULL || \
|
||||
RB_COLOR(RB_RIGHT(tmp, field), field) == RB_BLACK)) { \
|
||||
RB_COLOR(tmp, field) = RB_RED; \
|
||||
elm = parent; \
|
||||
parent = RB_PARENT(elm, field); \
|
||||
} else { \
|
||||
if (RB_RIGHT(tmp, field) == NULL || \
|
||||
RB_COLOR(RB_RIGHT(tmp, field), field) == RB_BLACK) { \
|
||||
struct type *oleft; \
|
||||
if ((oleft = RB_LEFT(tmp, field)) \
|
||||
!= NULL) \
|
||||
RB_COLOR(oleft, field) = RB_BLACK; \
|
||||
RB_COLOR(tmp, field) = RB_RED; \
|
||||
RB_ROTATE_RIGHT(head, tmp, oleft, field); \
|
||||
tmp = RB_RIGHT(parent, field); \
|
||||
} \
|
||||
RB_COLOR(tmp, field) = RB_COLOR(parent, field); \
|
||||
RB_COLOR(parent, field) = RB_BLACK; \
|
||||
if (RB_RIGHT(tmp, field)) \
|
||||
RB_COLOR(RB_RIGHT(tmp, field), field) = RB_BLACK; \
|
||||
RB_ROTATE_LEFT(head, parent, tmp, field); \
|
||||
elm = RB_ROOT(head); \
|
||||
break; \
|
||||
} \
|
||||
} else { \
|
||||
tmp = RB_LEFT(parent, field); \
|
||||
if (RB_COLOR(tmp, field) == RB_RED) { \
|
||||
RB_SET_BLACKRED(tmp, parent, field); \
|
||||
RB_ROTATE_RIGHT(head, parent, tmp, field); \
|
||||
tmp = RB_LEFT(parent, field); \
|
||||
} \
|
||||
if ((RB_LEFT(tmp, field) == NULL || \
|
||||
RB_COLOR(RB_LEFT(tmp, field), field) == RB_BLACK) && \
|
||||
(RB_RIGHT(tmp, field) == NULL || \
|
||||
RB_COLOR(RB_RIGHT(tmp, field), field) == RB_BLACK)) { \
|
||||
RB_COLOR(tmp, field) = RB_RED; \
|
||||
elm = parent; \
|
||||
parent = RB_PARENT(elm, field); \
|
||||
} else { \
|
||||
if (RB_LEFT(tmp, field) == NULL || \
|
||||
RB_COLOR(RB_LEFT(tmp, field), field) == RB_BLACK) { \
|
||||
struct type *oright; \
|
||||
if ((oright = RB_RIGHT(tmp, field)) \
|
||||
!= NULL) \
|
||||
RB_COLOR(oright, field) = RB_BLACK; \
|
||||
RB_COLOR(tmp, field) = RB_RED; \
|
||||
RB_ROTATE_LEFT(head, tmp, oright, field); \
|
||||
tmp = RB_LEFT(parent, field); \
|
||||
} \
|
||||
RB_COLOR(tmp, field) = RB_COLOR(parent, field); \
|
||||
RB_COLOR(parent, field) = RB_BLACK; \
|
||||
if (RB_LEFT(tmp, field)) \
|
||||
RB_COLOR(RB_LEFT(tmp, field), field) = RB_BLACK; \
|
||||
RB_ROTATE_RIGHT(head, parent, tmp, field); \
|
||||
elm = RB_ROOT(head); \
|
||||
break; \
|
||||
} \
|
||||
} \
|
||||
} \
|
||||
if (elm) \
|
||||
RB_COLOR(elm, field) = RB_BLACK; \
|
||||
} \
|
||||
\
|
||||
attr struct type * \
|
||||
name##_RB_REMOVE(struct name *head, struct type *elm) \
|
||||
{ \
|
||||
struct type *child, *parent, *old = elm; \
|
||||
int color; \
|
||||
if (RB_LEFT(elm, field) == NULL) \
|
||||
child = RB_RIGHT(elm, field); \
|
||||
else if (RB_RIGHT(elm, field) == NULL) \
|
||||
child = RB_LEFT(elm, field); \
|
||||
else { \
|
||||
struct type *left; \
|
||||
elm = RB_RIGHT(elm, field); \
|
||||
while ((left = RB_LEFT(elm, field)) != NULL) \
|
||||
elm = left; \
|
||||
child = RB_RIGHT(elm, field); \
|
||||
parent = RB_PARENT(elm, field); \
|
||||
color = RB_COLOR(elm, field); \
|
||||
if (child) \
|
||||
RB_PARENT(child, field) = parent; \
|
||||
if (parent) { \
|
||||
if (RB_LEFT(parent, field) == elm) \
|
||||
RB_LEFT(parent, field) = child; \
|
||||
else \
|
||||
RB_RIGHT(parent, field) = child; \
|
||||
RB_AUGMENT(parent); \
|
||||
} else \
|
||||
RB_ROOT(head) = child; \
|
||||
if (RB_PARENT(elm, field) == old) \
|
||||
parent = elm; \
|
||||
(elm)->field = (old)->field; \
|
||||
if (RB_PARENT(old, field)) { \
|
||||
if (RB_LEFT(RB_PARENT(old, field), field) == old) \
|
||||
RB_LEFT(RB_PARENT(old, field), field) = elm; \
|
||||
else \
|
||||
RB_RIGHT(RB_PARENT(old, field), field) = elm; \
|
||||
RB_AUGMENT(RB_PARENT(old, field)); \
|
||||
} else \
|
||||
RB_ROOT(head) = elm; \
|
||||
RB_PARENT(RB_LEFT(old, field), field) = elm; \
|
||||
if (RB_RIGHT(old, field)) \
|
||||
RB_PARENT(RB_RIGHT(old, field), field) = elm; \
|
||||
if (parent) { \
|
||||
left = parent; \
|
||||
do { \
|
||||
RB_AUGMENT(left); \
|
||||
} while ((left = RB_PARENT(left, field)) != NULL); \
|
||||
} \
|
||||
goto color; \
|
||||
} \
|
||||
parent = RB_PARENT(elm, field); \
|
||||
color = RB_COLOR(elm, field); \
|
||||
if (child) \
|
||||
RB_PARENT(child, field) = parent; \
|
||||
if (parent) { \
|
||||
if (RB_LEFT(parent, field) == elm) \
|
||||
RB_LEFT(parent, field) = child; \
|
||||
else \
|
||||
RB_RIGHT(parent, field) = child; \
|
||||
RB_AUGMENT(parent); \
|
||||
} else \
|
||||
RB_ROOT(head) = child; \
|
||||
color: \
|
||||
if (color == RB_BLACK) \
|
||||
name##_RB_REMOVE_COLOR(head, parent, child); \
|
||||
return (old); \
|
||||
} \
|
||||
\
|
||||
/* Inserts a node into the RB tree */ \
|
||||
attr struct type * \
|
||||
name##_RB_INSERT(struct name *head, struct type *elm) \
|
||||
{ \
|
||||
struct type *tmp; \
|
||||
struct type *parent = NULL; \
|
||||
int comp = 0; \
|
||||
tmp = RB_ROOT(head); \
|
||||
while (tmp) { \
|
||||
parent = tmp; \
|
||||
comp = (cmp)(elm, parent); \
|
||||
if (comp < 0) \
|
||||
tmp = RB_LEFT(tmp, field); \
|
||||
else if (comp > 0) \
|
||||
tmp = RB_RIGHT(tmp, field); \
|
||||
else \
|
||||
return (tmp); \
|
||||
} \
|
||||
RB_SET(elm, parent, field); \
|
||||
if (parent != NULL) { \
|
||||
if (comp < 0) \
|
||||
RB_LEFT(parent, field) = elm; \
|
||||
else \
|
||||
RB_RIGHT(parent, field) = elm; \
|
||||
RB_AUGMENT(parent); \
|
||||
} else \
|
||||
RB_ROOT(head) = elm; \
|
||||
name##_RB_INSERT_COLOR(head, elm); \
|
||||
return (NULL); \
|
||||
} \
|
||||
\
|
||||
/* Finds the node with the same key as elm */ \
|
||||
attr struct type * \
|
||||
name##_RB_FIND(struct name *head, struct type *elm) \
|
||||
{ \
|
||||
struct type *tmp = RB_ROOT(head); \
|
||||
int comp; \
|
||||
while (tmp) { \
|
||||
comp = cmp(elm, tmp); \
|
||||
if (comp < 0) \
|
||||
tmp = RB_LEFT(tmp, field); \
|
||||
else if (comp > 0) \
|
||||
tmp = RB_RIGHT(tmp, field); \
|
||||
else \
|
||||
return (tmp); \
|
||||
} \
|
||||
return (NULL); \
|
||||
} \
|
||||
\
|
||||
/* Finds the first node greater than or equal to the search key */ \
|
||||
attr struct type * \
|
||||
name##_RB_NFIND(struct name *head, struct type *elm) \
|
||||
{ \
|
||||
struct type *tmp = RB_ROOT(head); \
|
||||
struct type *res = NULL; \
|
||||
int comp; \
|
||||
while (tmp) { \
|
||||
comp = cmp(elm, tmp); \
|
||||
if (comp < 0) { \
|
||||
res = tmp; \
|
||||
tmp = RB_LEFT(tmp, field); \
|
||||
} \
|
||||
else if (comp > 0) \
|
||||
tmp = RB_RIGHT(tmp, field); \
|
||||
else \
|
||||
return (tmp); \
|
||||
} \
|
||||
return (res); \
|
||||
} \
|
||||
\
|
||||
/* ARGSUSED */ \
|
||||
attr struct type * \
|
||||
name##_RB_NEXT(struct type *elm) \
|
||||
{ \
|
||||
if (RB_RIGHT(elm, field)) { \
|
||||
elm = RB_RIGHT(elm, field); \
|
||||
while (RB_LEFT(elm, field)) \
|
||||
elm = RB_LEFT(elm, field); \
|
||||
} else { \
|
||||
if (RB_PARENT(elm, field) && \
|
||||
(elm == RB_LEFT(RB_PARENT(elm, field), field))) \
|
||||
elm = RB_PARENT(elm, field); \
|
||||
else { \
|
||||
while (RB_PARENT(elm, field) && \
|
||||
(elm == RB_RIGHT(RB_PARENT(elm, field), field))) \
|
||||
elm = RB_PARENT(elm, field); \
|
||||
elm = RB_PARENT(elm, field); \
|
||||
} \
|
||||
} \
|
||||
return (elm); \
|
||||
} \
|
||||
\
|
||||
/* ARGSUSED */ \
|
||||
attr struct type * \
|
||||
name##_RB_PREV(struct type *elm) \
|
||||
{ \
|
||||
if (RB_LEFT(elm, field)) { \
|
||||
elm = RB_LEFT(elm, field); \
|
||||
while (RB_RIGHT(elm, field)) \
|
||||
elm = RB_RIGHT(elm, field); \
|
||||
} else { \
|
||||
if (RB_PARENT(elm, field) && \
|
||||
(elm == RB_RIGHT(RB_PARENT(elm, field), field))) \
|
||||
elm = RB_PARENT(elm, field); \
|
||||
else { \
|
||||
while (RB_PARENT(elm, field) && \
|
||||
(elm == RB_LEFT(RB_PARENT(elm, field), field))) \
|
||||
elm = RB_PARENT(elm, field); \
|
||||
elm = RB_PARENT(elm, field); \
|
||||
} \
|
||||
} \
|
||||
return (elm); \
|
||||
} \
|
||||
\
|
||||
attr struct type * \
|
||||
name##_RB_MINMAX(struct name *head, int val) \
|
||||
{ \
|
||||
struct type *tmp = RB_ROOT(head); \
|
||||
struct type *parent = NULL; \
|
||||
while (tmp) { \
|
||||
parent = tmp; \
|
||||
if (val < 0) \
|
||||
tmp = RB_LEFT(tmp, field); \
|
||||
else \
|
||||
tmp = RB_RIGHT(tmp, field); \
|
||||
} \
|
||||
return (parent); \
|
||||
}
|
||||
|
||||
#define RB_NEGINF -1
|
||||
#define RB_INF 1
|
||||
|
||||
#define RB_INSERT(name, x, y) name##_RB_INSERT(x, y)
|
||||
#define RB_REMOVE(name, x, y) name##_RB_REMOVE(x, y)
|
||||
#define RB_FIND(name, x, y) name##_RB_FIND(x, y)
|
||||
#define RB_NFIND(name, x, y) name##_RB_NFIND(x, y)
|
||||
#define RB_NEXT(name, x, y) name##_RB_NEXT(y)
|
||||
#define RB_PREV(name, x, y) name##_RB_PREV(y)
|
||||
#define RB_MIN(name, x) name##_RB_MINMAX(x, RB_NEGINF)
|
||||
#define RB_MAX(name, x) name##_RB_MINMAX(x, RB_INF)
|
||||
|
||||
#define RB_FOREACH(x, name, head) \
|
||||
for ((x) = RB_MIN(name, head); \
|
||||
(x) != NULL; \
|
||||
(x) = name##_RB_NEXT(x))
|
||||
|
||||
#define RB_FOREACH_FROM(x, name, y) \
|
||||
for ((x) = (y); \
|
||||
((x) != NULL) && ((y) = name##_RB_NEXT(x), (x) != NULL); \
|
||||
(x) = (y))
|
||||
|
||||
#define RB_FOREACH_SAFE(x, name, head, y) \
|
||||
for ((x) = RB_MIN(name, head); \
|
||||
((x) != NULL) && ((y) = name##_RB_NEXT(x), (x) != NULL); \
|
||||
(x) = (y))
|
||||
|
||||
#define RB_FOREACH_REVERSE(x, name, head) \
|
||||
for ((x) = RB_MAX(name, head); \
|
||||
(x) != NULL; \
|
||||
(x) = name##_RB_PREV(x))
|
||||
|
||||
#define RB_FOREACH_REVERSE_FROM(x, name, y) \
|
||||
for ((x) = (y); \
|
||||
((x) != NULL) && ((y) = name##_RB_PREV(x), (x) != NULL); \
|
||||
(x) = (y))
|
||||
|
||||
#define RB_FOREACH_REVERSE_SAFE(x, name, head, y) \
|
||||
for ((x) = RB_MAX(name, head); \
|
||||
((x) != NULL) && ((y) = name##_RB_PREV(x), (x) != NULL); \
|
||||
(x) = (y))
|
||||
|
||||
#endif /* _OIO_TREE_H_ */
|
||||
Loading…
Reference in New Issue
Block a user