Current File : //usr/src/kernels/3.10.0-957.21.3.el7.centos.plus.x86_64/include/linux/idr_ext.h
/*
* include/linux/idr_ext.h IDR extended
*
* Copyright 2017 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef __IDR_EXT_H__
#define __IDR_EXT_H__
#include <linux/idr.h>
struct idr_ext {
struct idr idr_lo; /* Used for range <0, INT_MAX> */
struct idr idr_hi; /* Used for range <INT_MAX+1, UINT_MAX> */
};
int idr_alloc_ext(struct idr_ext *idrext, void *ptr, unsigned long *index,
unsigned long start, unsigned long end, gfp_t gfp);
void *idr_get_next_ext(struct idr_ext *idrext, unsigned long *nextidp);
#define idr_for_each_entry_ext(idr, entry, id) \
for (id = 0; ((entry) = idr_get_next_ext(idr, &(id))) != NULL; ++id)
static inline
void idr_init_ext(struct idr_ext *idrext)
{
idr_init(&idrext->idr_lo);
idr_init(&idrext->idr_hi);
}
static inline
void idr_destroy_ext(struct idr_ext *idrext)
{
idr_destroy(&idrext->idr_lo);
idr_destroy(&idrext->idr_hi);
}
static inline
void idr_remove_ext(struct idr_ext *idrext, unsigned long id)
{
if (id > UINT_MAX)
return;
if (id <= (unsigned long)INT_MAX)
idr_remove(&idrext->idr_lo, (int)id);
else
idr_remove(&idrext->idr_hi, (int)(id - INT_MAX - 1));
}
static inline
void *idr_find_ext(struct idr_ext *idrext, unsigned long id)
{
if (id > UINT_MAX)
return NULL;
if (id <= (unsigned long)INT_MAX)
return idr_find(&idrext->idr_lo, (int)id);
return idr_find(&idrext->idr_hi, (int)(id - INT_MAX - 1));
}
static inline
void *idr_replace_ext(struct idr_ext *idrext, void *ptr, unsigned long id)
{
if (id > UINT_MAX)
return NULL;
if (id <= (unsigned long)INT_MAX)
return idr_replace(&idrext->idr_lo, ptr, (int)id);
return idr_replace(&idrext->idr_hi, ptr, (int)(id - INT_MAX - 1));
}
#endif /* __IDR_EXT_H__ */
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