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Import radix-tree from btrfs-progs for replace std::set
Signed-off-by: Timofey Titovets <nefelim4ag@gmail.com>
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/* | ||
* Copyright (C) 2007 Oracle. All rights reserved. | ||
* | ||
* This program is free software; you can redistribute it and/or | ||
* modify it under the terms of the GNU General Public | ||
* License v2 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. | ||
* | ||
* You should have received a copy of the GNU General Public | ||
* License along with this program; if not, write to the | ||
* Free Software Foundation, Inc., 59 Temple Place - Suite 330, | ||
* Boston, MA 021110-1307, USA. | ||
*/ | ||
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#ifndef __KERNCOMPAT_H__ | ||
#define __KERNCOMPAT_H__ | ||
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#include <stdio.h> | ||
#include <stdlib.h> | ||
#include <errno.h> | ||
#include <string.h> | ||
#include <endian.h> | ||
#include <byteswap.h> | ||
#include <assert.h> | ||
#include <stddef.h> | ||
#include <linux/types.h> | ||
#include <stdint.h> | ||
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#include <features.h> | ||
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#ifndef __GLIBC__ | ||
#ifndef BTRFS_DISABLE_BACKTRACE | ||
#define BTRFS_DISABLE_BACKTRACE | ||
#endif | ||
#define __always_inline __inline __attribute__ ((__always_inline__)) | ||
#endif | ||
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#ifndef BTRFS_DISABLE_BACKTRACE | ||
#include <execinfo.h> | ||
#endif | ||
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#define ptr_to_u64(x) ((u64)(uintptr_t)x) | ||
#define u64_to_ptr(x) ((void *)(uintptr_t)x) | ||
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#ifndef READ | ||
#define READ 0 | ||
#define WRITE 1 | ||
#define READA 2 | ||
#endif | ||
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#define gfp_t int | ||
#define get_cpu_var(p) (p) | ||
#define __get_cpu_var(p) (p) | ||
#define BITS_PER_BYTE 8 | ||
#define BITS_PER_LONG (__SIZEOF_LONG__ * BITS_PER_BYTE) | ||
#define __GFP_BITS_SHIFT 20 | ||
#define __GFP_BITS_MASK ((int)((1 << __GFP_BITS_SHIFT) - 1)) | ||
#define GFP_KERNEL 0 | ||
#define GFP_NOFS 0 | ||
#define __read_mostly | ||
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) | ||
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#ifndef ULONG_MAX | ||
#define ULONG_MAX (~0UL) | ||
#endif | ||
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#define __token_glue(a,b,c) ___token_glue(a,b,c) | ||
#define ___token_glue(a,b,c) a ## b ## c | ||
#ifdef DEBUG_BUILD_CHECKS | ||
#define BUILD_ASSERT(x) extern int __token_glue(compile_time_assert_,__LINE__,__COUNTER__)[1-2*!(x)] __attribute__((unused)) | ||
#else | ||
#define BUILD_ASSERT(x) | ||
#endif | ||
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#ifndef BTRFS_DISABLE_BACKTRACE | ||
#define MAX_BACKTRACE 16 | ||
static inline void print_trace(void) | ||
{ | ||
void *array[MAX_BACKTRACE]; | ||
int size; | ||
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size = backtrace(array, MAX_BACKTRACE); | ||
backtrace_symbols_fd(array, size, 2); | ||
} | ||
#endif | ||
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static inline void warning_trace(const char *assertion, const char *filename, | ||
const char *func, unsigned line, long val) | ||
{ | ||
if (!val) | ||
return; | ||
fprintf(stderr, | ||
"%s:%d: %s: Warning: assertion `%s` failed, value %ld\n", | ||
filename, line, func, assertion, val); | ||
#ifndef BTRFS_DISABLE_BACKTRACE | ||
print_trace(); | ||
#endif | ||
} | ||
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static inline void bugon_trace(const char *assertion, const char *filename, | ||
const char *func, unsigned line, long val) | ||
{ | ||
if (!val) | ||
return; | ||
fprintf(stderr, | ||
"%s:%d: %s: BUG_ON `%s` triggered, value %ld\n", | ||
filename, line, func, assertion, val); | ||
#ifndef BTRFS_DISABLE_BACKTRACE | ||
print_trace(); | ||
#endif | ||
abort(); | ||
exit(1); | ||
} | ||
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#ifdef __CHECKER__ | ||
#define __force __attribute__((force)) | ||
#define __bitwise__ __attribute__((bitwise)) | ||
#else | ||
#define __force | ||
#define __bitwise__ | ||
#endif | ||
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#ifndef __CHECKER__ | ||
/* | ||
* Since we're using primitive definitions from kernel-space, we need to | ||
* define __KERNEL__ so that system header files know which definitions | ||
* to use. | ||
*/ | ||
#define __KERNEL__ | ||
#include <asm/types.h> | ||
typedef __u32 u32; | ||
typedef __u64 u64; | ||
typedef __u16 u16; | ||
typedef __u8 u8; | ||
typedef __s64 s64; | ||
typedef __s32 s32; | ||
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/* | ||
* Continuing to define __KERNEL__ breaks others parts of the code, so | ||
* we can just undefine it now that we have the correct headers... | ||
*/ | ||
#undef __KERNEL__ | ||
#else | ||
typedef unsigned int u32; | ||
typedef unsigned int __u32; | ||
typedef unsigned long long u64; | ||
typedef unsigned char u8; | ||
typedef unsigned short u16; | ||
typedef long long s64; | ||
typedef int s32; | ||
#endif | ||
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struct vma_shared { int prio_tree_node; }; | ||
struct vm_area_struct { | ||
unsigned long vm_pgoff; | ||
unsigned long vm_start; | ||
unsigned long vm_end; | ||
struct vma_shared shared; | ||
}; | ||
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struct page { | ||
unsigned long index; | ||
}; | ||
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struct mutex { | ||
unsigned long lock; | ||
}; | ||
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#define mutex_init(m) \ | ||
do { \ | ||
(m)->lock = 1; \ | ||
} while (0) | ||
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static inline void mutex_lock(struct mutex *m) | ||
{ | ||
m->lock--; | ||
} | ||
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static inline void mutex_unlock(struct mutex *m) | ||
{ | ||
m->lock++; | ||
} | ||
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static inline int mutex_is_locked(struct mutex *m) | ||
{ | ||
return (m->lock != 1); | ||
} | ||
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#define cond_resched() do { } while (0) | ||
#define preempt_enable() do { } while (0) | ||
#define preempt_disable() do { } while (0) | ||
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#define BITOP_MASK(nr) (1UL << ((nr) % BITS_PER_LONG)) | ||
#define BITOP_WORD(nr) ((nr) / BITS_PER_LONG) | ||
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#ifndef __attribute_const__ | ||
#define __attribute_const__ __attribute__((__const__)) | ||
#endif | ||
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/** | ||
* __set_bit - Set a bit in memory | ||
* @nr: the bit to set | ||
* @addr: the address to start counting from | ||
* | ||
* Unlike set_bit(), this function is non-atomic and may be reordered. | ||
* If it's called on the same region of memory simultaneously, the effect | ||
* may be that only one operation succeeds. | ||
*/ | ||
static inline void __set_bit(int nr, volatile unsigned long *addr) | ||
{ | ||
unsigned long mask = BITOP_MASK(nr); | ||
unsigned long *p = ((unsigned long *)addr) + BITOP_WORD(nr); | ||
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*p |= mask; | ||
} | ||
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static inline void __clear_bit(int nr, volatile unsigned long *addr) | ||
{ | ||
unsigned long mask = BITOP_MASK(nr); | ||
unsigned long *p = ((unsigned long *)addr) + BITOP_WORD(nr); | ||
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*p &= ~mask; | ||
} | ||
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/** | ||
* test_bit - Determine whether a bit is set | ||
* @nr: bit number to test | ||
* @addr: Address to start counting from | ||
*/ | ||
static inline int test_bit(int nr, const volatile unsigned long *addr) | ||
{ | ||
return 1UL & (addr[BITOP_WORD(nr)] >> (nr & (BITS_PER_LONG-1))); | ||
} | ||
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/* | ||
* error pointer | ||
*/ | ||
#define MAX_ERRNO 4095 | ||
#define IS_ERR_VALUE(x) ((x) >= (unsigned long)-MAX_ERRNO) | ||
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static inline void *ERR_PTR(long error) | ||
{ | ||
return (void *) error; | ||
} | ||
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static inline long PTR_ERR(const void *ptr) | ||
{ | ||
return (long) ptr; | ||
} | ||
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static inline int IS_ERR(const void *ptr) | ||
{ | ||
return IS_ERR_VALUE((unsigned long)ptr); | ||
} | ||
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static inline int IS_ERR_OR_NULL(const void *ptr) | ||
{ | ||
return !ptr || IS_ERR(ptr); | ||
} | ||
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/* | ||
* This looks more complex than it should be. But we need to | ||
* get the type for the ~ right in round_down (it needs to be | ||
* as wide as the result!), and we want to evaluate the macro | ||
* arguments just once each. | ||
*/ | ||
#define __round_mask(x, y) ((__typeof__(x))((y)-1)) | ||
#define round_up(x, y) ((((x)-1) | __round_mask(x, y))+1) | ||
#define round_down(x, y) ((x) & ~__round_mask(x, y)) | ||
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/* | ||
* printk | ||
*/ | ||
#define printk(fmt, args...) fprintf(stderr, fmt, ##args) | ||
#define KERN_CRIT "" | ||
#define KERN_ERR "" | ||
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/* | ||
* kmalloc/kfree | ||
*/ | ||
#define kmalloc(x, y) malloc(x) | ||
#define kzalloc(x, y) calloc(1, x) | ||
#define kstrdup(x, y) strdup(x) | ||
#define kfree(x) free(x) | ||
#define vmalloc(x) malloc(x) | ||
#define vfree(x) free(x) | ||
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#ifndef BTRFS_DISABLE_BACKTRACE | ||
static inline void assert_trace(const char *assertion, const char *filename, | ||
const char *func, unsigned line, long val) | ||
{ | ||
if (val) | ||
return; | ||
fprintf(stderr, | ||
"%s:%d: %s: Assertion `%s` failed, value %ld\n", | ||
filename, line, func, assertion, val); | ||
#ifndef BTRFS_DISABLE_BACKTRACE | ||
print_trace(); | ||
#endif | ||
abort(); | ||
exit(1); | ||
} | ||
#define ASSERT(c) assert_trace(#c, __FILE__, __func__, __LINE__, (long)(c)) | ||
#else | ||
#define ASSERT(c) assert(c) | ||
#endif | ||
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#define BUG_ON(c) bugon_trace(#c, __FILE__, __func__, __LINE__, (long)(c)) | ||
#define BUG() BUG_ON(1) | ||
#define WARN_ON(c) warning_trace(#c, __FILE__, __func__, __LINE__, (long)(c)) | ||
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#define container_of(ptr, type, member) ({ \ | ||
const typeof( ((type *)0)->member ) *__mptr = (ptr); \ | ||
(type *)( (char *)__mptr - offsetof(type,member) );}) | ||
#ifndef __bitwise | ||
#ifdef __CHECKER__ | ||
#define __bitwise __bitwise__ | ||
#else | ||
#define __bitwise | ||
#endif /* __CHECKER__ */ | ||
#endif /* __bitwise */ | ||
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/* Alignment check */ | ||
#define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0) | ||
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static inline int is_power_of_2(unsigned long n) | ||
{ | ||
return (n != 0 && ((n & (n - 1)) == 0)); | ||
} | ||
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typedef u16 __bitwise __le16; | ||
typedef u16 __bitwise __be16; | ||
typedef u32 __bitwise __le32; | ||
typedef u32 __bitwise __be32; | ||
typedef u64 __bitwise __le64; | ||
typedef u64 __bitwise __be64; | ||
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/* Macros to generate set/get funcs for the struct fields | ||
* assume there is a lefoo_to_cpu for every type, so lets make a simple | ||
* one for u8: | ||
*/ | ||
#define le8_to_cpu(v) (v) | ||
#define cpu_to_le8(v) (v) | ||
#define __le8 u8 | ||
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#if __BYTE_ORDER == __BIG_ENDIAN | ||
#define cpu_to_le64(x) ((__force __le64)(u64)(bswap_64(x))) | ||
#define le64_to_cpu(x) ((__force u64)(__le64)(bswap_64(x))) | ||
#define cpu_to_le32(x) ((__force __le32)(u32)(bswap_32(x))) | ||
#define le32_to_cpu(x) ((__force u32)(__le32)(bswap_32(x))) | ||
#define cpu_to_le16(x) ((__force __le16)(u16)(bswap_16(x))) | ||
#define le16_to_cpu(x) ((__force u16)(__le16)(bswap_16(x))) | ||
#else | ||
#define cpu_to_le64(x) ((__force __le64)(u64)(x)) | ||
#define le64_to_cpu(x) ((__force u64)(__le64)(x)) | ||
#define cpu_to_le32(x) ((__force __le32)(u32)(x)) | ||
#define le32_to_cpu(x) ((__force u32)(__le32)(x)) | ||
#define cpu_to_le16(x) ((__force __le16)(u16)(x)) | ||
#define le16_to_cpu(x) ((__force u16)(__le16)(x)) | ||
#endif | ||
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struct __una_u16 { __le16 x; } __attribute__((__packed__)); | ||
struct __una_u32 { __le32 x; } __attribute__((__packed__)); | ||
struct __una_u64 { __le64 x; } __attribute__((__packed__)); | ||
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#define get_unaligned_le8(p) (*((u8 *)(p))) | ||
#define get_unaligned_8(p) (*((u8 *)(p))) | ||
#define put_unaligned_le8(val,p) ((*((u8 *)(p))) = (val)) | ||
#define put_unaligned_8(val,p) ((*((u8 *)(p))) = (val)) | ||
#define get_unaligned_le16(p) le16_to_cpu(((const struct __una_u16 *)(p))->x) | ||
#define get_unaligned_16(p) (((const struct __una_u16 *)(p))->x) | ||
#define put_unaligned_le16(val,p) (((struct __una_u16 *)(p))->x = cpu_to_le16(val)) | ||
#define put_unaligned_16(val,p) (((struct __una_u16 *)(p))->x = (val)) | ||
#define get_unaligned_le32(p) le32_to_cpu(((const struct __una_u32 *)(p))->x) | ||
#define get_unaligned_32(p) (((const struct __una_u32 *)(p))->x) | ||
#define put_unaligned_le32(val,p) (((struct __una_u32 *)(p))->x = cpu_to_le32(val)) | ||
#define put_unaligned_32(val,p) (((struct __una_u32 *)(p))->x = (val)) | ||
#define get_unaligned_le64(p) le64_to_cpu(((const struct __una_u64 *)(p))->x) | ||
#define get_unaligned_64(p) (((const struct __una_u64 *)(p))->x) | ||
#define put_unaligned_le64(val,p) (((struct __una_u64 *)(p))->x = cpu_to_le64(val)) | ||
#define put_unaligned_64(val,p) (((struct __una_u64 *)(p))->x = (val)) | ||
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#ifndef true | ||
#define true 1 | ||
#define false 0 | ||
#endif | ||
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#ifndef noinline | ||
#define noinline | ||
#endif | ||
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#endif |
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