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|
/*
Copyright (C) 2009-2017 Brazil
Copyright (C) 2021-2022 Sutou Kouhei <kou@clear-code.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#pragma once
#include "grn.h"
#include "grn_ctx.h"
#include "grn_error.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifdef WIN32
# define GRN_IO_FILE_CREATE_MODE (GENERIC_READ | GENERIC_WRITE)
#else /* WIN32 */
# define GRN_IO_FILE_CREATE_MODE 0644
#endif /* WIN32 */
typedef enum {
GRN_IO_RDONLY,
GRN_IO_WRONLY,
GRN_IO_RDWR
} grn_io_rw_mode;
typedef enum {
GRN_IO_AUTO,
GRN_IO_MANUAL
} grn_io_mode;
/**** grn_io ****/
typedef struct _grn_io grn_io;
typedef struct {
grn_io *io;
grn_ctx *ctx;
uint8_t mode;
uint8_t tiny_p;
uint32_t pseg;
uint32_t segment;
uint32_t offset;
uint32_t size;
uint32_t nseg;
void *addr;
uint32_t diff;
int32_t cached;
#ifdef WIN32
HANDLE fmo;
#endif /* WIN32 */
void *uncompressed_value;
} grn_io_win;
typedef struct {
void *map;
uint32_t nref;
uint32_t count;
#ifdef WIN32
HANDLE fmo;
#endif /* WIN32 */
} grn_io_mapinfo;
typedef struct _grn_io_array_info grn_io_array_info;
struct _grn_io_header {
char idstr[16];
uint32_t type;
uint32_t version;
uint32_t flags;
uint32_t header_size;
uint32_t segment_size;
uint32_t max_segment;
uint32_t n_arrays;
uint32_t lock;
uint64_t curr_size;
uint32_t segment_tail;
uint32_t last_modified;
};
struct _grn_io {
char path[PATH_MAX];
struct _grn_io_header *header;
byte *user_header;
grn_io_mapinfo *maps;
uint32_t base;
uint32_t base_seg;
grn_io_mode mode;
struct _grn_io_fileinfo *fis;
grn_io_array_info *ainfo;
uint32_t max_map_seg;
uint32_t nmaps;
uint32_t nref;
uint32_t count;
uint32_t flags;
uint32_t *lock;
};
GRN_API grn_io *
grn_io_create(grn_ctx *ctx,
const char *path,
uint32_t header_size,
uint32_t segment_size,
uint32_t max_segment,
grn_io_mode mode,
unsigned int flags);
grn_io *
grn_io_open(grn_ctx *ctx, const char *path, grn_io_mode mode);
GRN_API grn_rc
grn_io_close(grn_ctx *ctx, grn_io *io);
grn_rc
grn_io_remove(grn_ctx *ctx, const char *path);
grn_rc
grn_io_remove_if_exist(grn_ctx *ctx, const char *path);
grn_rc
grn_io_size(grn_ctx *ctx, grn_io *io, uint64_t *size);
grn_rc
grn_io_rename(grn_ctx *ctx, const char *old_name, const char *new_name);
GRN_API void *
grn_io_header(grn_io *io);
void *
grn_io_win_map(grn_ctx *ctx,
grn_io *io,
grn_io_win *iw,
uint32_t segment,
uint32_t offset,
uint32_t size,
grn_io_rw_mode mode);
grn_rc
grn_io_win_unmap(grn_ctx *ctx, grn_io_win *iw);
typedef struct _grn_io_ja_einfo grn_io_ja_einfo;
typedef struct _grn_io_ja_ehead grn_io_ja_ehead;
struct _grn_io_ja_einfo {
uint32_t pos;
uint32_t size;
};
struct _grn_io_ja_ehead {
uint32_t size;
uint32_t key;
};
grn_rc
grn_io_read_ja(grn_io *io,
grn_ctx *ctx,
grn_io_ja_einfo *einfo,
uint32_t epos,
uint32_t key,
uint32_t segment,
uint32_t offset,
void **value,
uint32_t *value_len);
grn_rc
grn_io_write_ja(grn_io *io,
grn_ctx *ctx,
uint32_t key,
uint32_t segment,
uint32_t offset,
void *value,
uint32_t value_len);
grn_rc
grn_io_write_ja_ehead(grn_io *io,
grn_ctx *ctx,
uint32_t key,
uint32_t segment,
uint32_t offset,
uint32_t value_len);
#define GRN_TABLE_ADD (0x01 << 6)
#define GRN_TABLE_ADDED (0x01 << 7)
#define GRN_IO_MAX_RETRY (0x10000)
#define GRN_IO_MAX_REF (0x80000000)
#define GRN_IO_EXPIRE_GTICK (0x01)
#define GRN_IO_EXPIRE_SEGMENT (0x02)
#define GRN_IO_TEMPORARY (0x04)
void
grn_io_seg_map_(grn_ctx *ctx, grn_io *io, uint32_t segno, grn_io_mapinfo *info);
/*
* io mustn't be NULL;
*/
static inline void *
grn_io_seg_ref(grn_ctx *ctx, grn_io *io, uint32_t segno)
{
const char *tag = "[io][seg][ref]";
grn_io_mapinfo *info = NULL;
if (segno >= io->header->max_segment) {
ERR(GRN_INVALID_ARGUMENT,
"%s too large segment ID: "
"id:%u, "
"max:%u, "
"path:<%s>",
tag,
segno,
io->header->max_segment,
io->path);
return NULL;
}
info = &(io->maps[segno]);
uint32_t nref, retry, *pnref = &info->nref;
if (io->flags & GRN_IO_EXPIRE_SEGMENT) {
if (io->flags & GRN_IO_EXPIRE_GTICK) {
for (retry = 0; !info->map || info->count != grn_gtick; retry++) {
GRN_ATOMIC_ADD_EX(pnref, 1, nref);
if (nref) {
GRN_ATOMIC_ADD_EX(pnref, -1, nref);
if (retry >= GRN_IO_MAX_RETRY) {
GRN_LOG(ctx,
GRN_LOG_CRIT,
"deadlock detected! in grn_io_seg_ref(%p, %u)",
io,
segno);
break;
}
GRN_FUTEX_WAIT(pnref);
} else {
info->count = grn_gtick;
if (!info->map) {
grn_io_seg_map_(ctx, io, segno, info);
if (!info->map) {
CRIT(GRN_NO_MEMORY_AVAILABLE,
"%s failed to mmap with expire-segment & expire-gtick: "
"id:%u, "
"max:%u, "
"path:<%s>, "
"message:%s",
tag,
segno,
io->header->max_segment,
io->path,
grn_error_get_current_system_message());
}
}
GRN_ATOMIC_ADD_EX(pnref, -1, nref);
GRN_FUTEX_WAKE(pnref);
break;
}
}
} else {
for (retry = 0;; retry++) {
GRN_ATOMIC_ADD_EX(pnref, 1, nref);
if (nref >= GRN_IO_MAX_REF) {
GRN_ATOMIC_ADD_EX(pnref, -1, nref);
if (retry >= GRN_IO_MAX_RETRY) {
GRN_LOG(ctx,
GRN_LOG_CRIT,
"deadlock detected!! in grn_io_seg_ref(%p, %u, %u)",
io,
segno,
nref);
*pnref = 0; /* force reset */
break;
}
GRN_FUTEX_WAIT(pnref);
continue;
}
if (nref >= 0x40000000) {
ALERT("strange nref value!! in grn_io_seg_ref(%p, %u, %u)",
io,
segno,
nref);
}
if (!info->map) {
if (nref) {
GRN_ATOMIC_ADD_EX(pnref, -1, nref);
if (retry >= GRN_IO_MAX_RETRY) {
GRN_LOG(ctx,
GRN_LOG_CRIT,
"deadlock detected!!! in grn_io_seg_ref(%p, %u, %u)",
io,
segno,
nref);
break;
}
GRN_FUTEX_WAIT(pnref);
continue;
} else {
grn_io_seg_map_(ctx, io, segno, info);
if (!info->map) {
GRN_ATOMIC_ADD_EX(pnref, -1, nref);
CRIT(GRN_NO_MEMORY_AVAILABLE,
"%s failed to mmap with expire-segment: "
"id:%u, "
"nref:%u, "
"max:%u, "
"path:<%s>, "
"message:%s",
tag,
segno,
nref,
io->header->max_segment,
io->path,
grn_error_get_current_system_message());
}
GRN_FUTEX_WAKE(pnref);
}
}
break;
}
info->count = grn_gtick;
}
} else {
for (retry = 0; !info->map; retry++) {
GRN_ATOMIC_ADD_EX(pnref, 1, nref);
if (nref) {
GRN_ATOMIC_ADD_EX(pnref, -1, nref);
if (retry >= GRN_IO_MAX_RETRY) {
GRN_LOG(ctx,
GRN_LOG_CRIT,
"deadlock detected!!!! in grn_io_seg_ref(%p, %u)",
io,
segno);
break;
}
GRN_FUTEX_WAIT(pnref);
} else {
if (!info->map) {
grn_io_seg_map_(ctx, io, segno, info);
if (!info->map) {
CRIT(GRN_NO_MEMORY_AVAILABLE,
"%s failed to mmap: "
"id:%u, "
"max:%u, "
"path:<%s>, "
"message:%s",
tag,
segno,
io->header->max_segment,
io->path,
grn_error_get_current_system_message());
}
}
GRN_ATOMIC_ADD_EX(pnref, -1, nref);
GRN_FUTEX_WAKE(pnref);
break;
}
}
info->count = grn_gtick;
}
return info->map;
}
static inline void
grn_io_seg_unref(grn_ctx *ctx, grn_io *io, uint32_t segno)
{
if (GRN_IO_EXPIRE_SEGMENT ==
(io->flags & (GRN_IO_EXPIRE_GTICK | GRN_IO_EXPIRE_SEGMENT))) {
uint32_t nref, *pnref = &(io)->maps[segno].nref;
GRN_ATOMIC_ADD_EX(pnref, -1, nref);
}
}
uint32_t
grn_io_base_seg(grn_io *io);
const char *
grn_io_path(grn_io *io);
typedef struct _grn_io_array_spec grn_io_array_spec;
struct _grn_io_array_spec {
uint32_t w_of_element;
uint32_t max_n_segments;
};
struct _grn_io_array_info {
uint32_t w_of_elm_in_a_segment;
uint32_t elm_mask_in_a_segment;
uint32_t max_n_segments;
uint32_t element_size;
uint32_t *segments;
void **addrs;
};
grn_io *
grn_io_create_with_array(grn_ctx *ctx,
const char *path,
uint32_t header_size,
uint32_t segment_size,
grn_io_mode mode,
uint32_t n_arrays,
grn_io_array_spec *array_specs);
void
grn_io_segment_alloc(grn_ctx *ctx,
grn_io *io,
grn_io_array_info *ai,
uint32_t lseg,
int *flags,
void **p);
GRN_API grn_rc
grn_io_lock(grn_ctx *ctx, grn_io *io, int timeout);
GRN_API void
grn_io_unlock(grn_ctx *ctx, grn_io *io);
void
grn_io_clear_lock(grn_io *io);
uint32_t
grn_io_is_locked(grn_io *io);
bool
grn_io_is_corrupt(grn_ctx *ctx, grn_io *io);
size_t
grn_io_get_disk_usage(grn_ctx *ctx, grn_io *io);
static inline void *
grn_io_array_at(
grn_ctx *ctx, grn_io *io, uint32_t array, uint64_t offset, int *flags)
{
grn_io_array_info *ainfo = &(io->ainfo[array]);
uint32_t lseg = (uint32_t)(offset >> ainfo->w_of_elm_in_a_segment);
if (lseg >= ainfo->max_n_segments) {
ERR(GRN_NO_MEMORY_AVAILABLE,
"[io][array][at] too large offset: %" GRN_FMT_INT64U
": max=%" GRN_FMT_INT64D ": nth=%u"
": path=<%s>",
offset,
(int64_t)((ainfo->max_n_segments << ainfo->w_of_elm_in_a_segment) - 1),
array,
io->path);
return NULL;
}
void **p_ = &ainfo->addrs[lseg];
if (!*p_) {
grn_io_segment_alloc(ctx, io, ainfo, lseg, flags, p_);
if (!*p_) {
return NULL;
}
}
return (((byte *)*p_) +
((offset & ainfo->elm_mask_in_a_segment) * ainfo->element_size));
}
#define GRN_IO_ARRAY_BIT_AT(io, array, offset, res) \
do { \
int flags_ = 0; \
uint8_t *ptr_ = \
grn_io_array_at(ctx, (io), (array), ((offset) >> 3) + 1, &flags_, ); \
res = ptr_ ? ((*ptr_ >> ((offset) & 7)) & 1) : 0; \
} while (0)
#define GRN_IO_ARRAY_BIT_ON(io, array, offset) \
do { \
int flags_ = GRN_TABLE_ADD; \
uint8_t *ptr_ = \
grn_io_array_at(ctx, (io), (array), ((offset) >> 3) + 1, &flags_); \
if (ptr_) { \
*ptr_ |= (1 << ((offset) & 7)); \
} \
} while (0)
#define GRN_IO_ARRAY_BIT_OFF(io, array, offset) \
do { \
int flags_ = GRN_TABLE_ADD; \
uint8_t *ptr = \
grn_io_array_at(ctx, (io), (array), ((offset) >> 3) + 1, &flags_); \
if (ptr_) { \
*ptr_ &= ~(1 << ((offset) & 7)); \
} \
} while (0)
#define GRN_IO_ARRAY_BIT_FLIP(io, array, offset) \
do { \
int flags_ = GRN_TABLE_ADD; \
uint8_t *ptr_ = \
grn_io_array_at((io), (array), ((offset) >> 3) + 1, &flags_); \
if (ptr_) { \
*ptr_ ^= (1 << ((offset) & 7)); \
} \
} while (0)
void *
grn_io_anon_map(grn_ctx *ctx, grn_io_mapinfo *mi, size_t length);
void
grn_io_anon_unmap(grn_ctx *ctx, grn_io_mapinfo *mi, size_t length);
uint32_t
grn_io_detect_type(grn_ctx *ctx, const char *path);
grn_rc
grn_io_set_type(grn_io *io, uint32_t type);
uint32_t
grn_io_get_type(grn_io *io);
void
grn_io_init_from_env(void);
uint32_t
grn_io_expire(grn_ctx *ctx, grn_io *io, uint32_t count_thresh, uint32_t limit);
grn_rc
grn_io_flush(grn_ctx *ctx, grn_io *io);
bool
grn_io_warm_path(grn_ctx *ctx, grn_io *io, const char *path);
grn_rc
grn_io_warm(grn_ctx *ctx, grn_io *io);
/* encode/decode */
#define GRN_B_ENC_MAX_SIZE 5
/* B is for ???
*
* v: The uint32_t value to be encoded.
*
* v < 0x8f:
* +--------+
* |1000AAAA|
* +--------+
* A = v
*
* 0x8f <= v < 0x408f:
* +--------+--------+
* |11AAAAAA|BBBBBBBB|
* +--------+--------+
* A = ((v - 0x8f) >> 8)
* B = ((v - 0x8f) & 0xff)
*
* 0x408f <= v < 0x20408f:
* +--------+--------+--------+
* |101AAAAA|BBBBBBBB|CCCCCCCC|
* +--------+--------+--------+
* A = ((v - 0x408f) >> 16)
* B = ((v - 0x408f) >> 8) & 0xff
* C = ((v - 0x408f) & 0xff)
*
* 0x20408f <= v < 0x1020408f:
* +--------+--------+--------+--------+
* |1001AAAA|BBBBBBBB|CCCCCCCC|DDDDDDDD|
* +--------+--------+--------+--------+
* A = ((v - 0x20408f) >> 24)
* B = ((v - 0x20408f) >> 16) & 0xff
* C = ((v - 0x20408f) >> 8) & 0xff
* D = ((v - 0x20408f) & 0xff)
*
* 0x1020408f <= v:
* +--------+--------+--------+--------+--------+
* |10001111|AAAAAAAA|BBBBBBBB|CCCCCCCC|DDDDDDDD|
* +--------+--------+--------+--------+--------+
* A = (v >> 24) & 0xff
* B = (v >> 16) & 0xff
* C = (v >> 8) & 0xff
* D = (v & 0xff)
* */
#define GRN_B_ENC(v, p) \
do { \
uint8_t *_p = (uint8_t *)p; \
uint32_t _v = v; \
if (_v < 0x8f) { \
*_p++ = (uint8_t)_v; \
} else if (_v < 0x408f) { \
_v -= 0x8f; \
*_p++ = (uint8_t)(0xc0 + (_v >> 8)); \
*_p++ = _v & 0xff; \
} else if (_v < 0x20408f) { \
_v -= 0x408f; \
*_p++ = (uint8_t)(0xa0 + (_v >> 16)); \
*_p++ = (_v >> 8) & 0xff; \
*_p++ = _v & 0xff; \
} else if (_v < 0x1020408f) { \
_v -= 0x20408f; \
*_p++ = (uint8_t)(0x90 + (_v >> 24)); \
*_p++ = (_v >> 16) & 0xff; \
*_p++ = (_v >> 8) & 0xff; \
*_p++ = _v & 0xff; \
} else { \
*_p++ = 0x8f; \
grn_memcpy(_p, &_v, sizeof(uint32_t)); \
_p += sizeof(uint32_t); \
} \
p = _p; \
} while (0)
#define GRN_B_ENC_SIZE(v) \
((v) < 0x8f \
? 1 \
: ((v) < 0x408f ? 2 : ((v) < 0x20408f ? 3 : ((v) < 0x1020408f ? 4 : 5))))
#define GRN_B_DEC(v, p) \
do { \
uint8_t *_p = (uint8_t *)p; \
uint32_t _v = *_p++; \
switch (_v >> 4) { \
case 0x08: \
if (_v == 0x8f) { \
grn_memcpy(&_v, _p, sizeof(uint32_t)); \
_p += sizeof(uint32_t); \
} \
break; \
case 0x09: \
_v = (_v - 0x90) * 0x100 + *_p++; \
_v = _v * 0x100 + *_p++; \
_v = _v * 0x100 + *_p++ + 0x20408f; \
break; \
case 0x0a: \
case 0x0b: \
_v = (_v - 0xa0) * 0x100 + *_p++; \
_v = _v * 0x100 + *_p++ + 0x408f; \
break; \
case 0x0c: \
case 0x0d: \
case 0x0e: \
case 0x0f: \
_v = (_v - 0xc0) * 0x100 + *_p++ + 0x8f; \
break; \
} \
v = _v; \
p = _p; \
} while (0)
#define GRN_B_SKIP(p) \
do { \
uint8_t *_p = (uint8_t *)p; \
uint32_t _v = *_p++; \
switch (_v >> 4) { \
case 0x08: \
if (_v == 0x8f) { \
_p += sizeof(uint32_t); \
} \
break; \
case 0x09: \
_p += 3; \
break; \
case 0x0a: \
case 0x0b: \
_p += 2; \
break; \
case 0x0c: \
case 0x0d: \
case 0x0e: \
case 0x0f: \
_p += 1; \
break; \
} \
p = _p; \
} while (0)
#define GRN_B_COPY(p2, p1) \
do { \
uint32_t size = 0, _v = *p1++; \
*p2++ = _v; \
switch (_v >> 4) { \
case 0x08: \
size = (_v == 0x8f) ? 4 : 0; \
break; \
case 0x09: \
size = 3; \
break; \
case 0x0a: \
case 0x0b: \
size = 2; \
break; \
case 0x0c: \
case 0x0d: \
case 0x0e: \
case 0x0f: \
size = 1; \
break; \
} \
while (size--) { \
*p2++ = *p1++; \
} \
} while (0)
#ifdef __cplusplus
}
#endif
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