1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
#![deny(missing_docs)]
#![cfg_attr(test, deny(warnings))]
#![cfg_attr(test, deny(bad_style))]
#![cfg_attr(test, deny(future_incompatible))]
#![cfg_attr(test, deny(nonstandard_style))]
#![cfg_attr(test, deny(rust_2018_compatibility))]
#![cfg_attr(test, deny(rust_2018_idioms))]
#![cfg_attr(test, deny(unused))]
#![cfg_attr(feature = "clippy", feature(plugin))]
#![cfg_attr(feature = "clippy", plugin(clippy))]
#![cfg_attr(feature = "clippy", allow(inline_always))]
#![cfg_attr(feature = "nightly", feature(integer_atomics))]
#[cfg(all(not(feature = "nightly"), target_pointer_width = "32"))]
compile_error!(
"32 bit architectures require a nightly compiler for now. \
See https://github.com/spacejam/sled/issues/145"
);
#[cfg(feature = "failpoints")]
use fail::fail_point;
macro_rules! maybe_fail {
($e:expr) => {
#[cfg(feature = "failpoints")]
fail_point!($e, |_| Err(Error::FailPoint));
};
}
macro_rules! rep_no_copy {
($e:expr; $n:expr) => {{
let mut v = Vec::with_capacity($n);
for _ in 0..$n {
v.push($e);
}
v
}};
}
mod blob_io;
mod config;
mod constants;
mod diskptr;
mod ds;
mod flusher;
mod hash;
mod iobuf;
mod iterator;
mod materializer;
mod metrics;
mod pagecache;
mod parallel_io;
mod reader;
mod reservation;
mod result;
mod segment;
mod snapshot;
mod tx;
mod util;
#[cfg(feature = "measure_allocs")]
mod measure_allocs;
#[cfg(feature = "measure_allocs")]
#[global_allocator]
static ALLOCATOR: measure_allocs::TrackingAllocator =
measure_allocs::TrackingAllocator;
#[cfg(feature = "event_log")]
pub mod event_log;
pub mod logger;
use std::{
cell::UnsafeCell,
fmt::{self, Debug},
io,
};
use bincode::{deserialize, serialize};
use lazy_static::lazy_static;
use log::{debug, error, info, trace, warn};
use serde::{de::DeserializeOwned, Deserialize, Serialize};
use sled_sync::atomic::{AtomicUsize, Ordering::SeqCst};
#[doc(hidden)]
use self::logger::{
MessageHeader, MessageKind, SegmentHeader, SegmentTrailer,
};
#[cfg(not(unix))]
use self::metrics::uptime;
use self::{
blob_io::{gc_blobs, read_blob, remove_blob, write_blob},
ds::{node_from_frag_vec, Lru, Node, Stack, StackIter},
hash::{crc16_arr, crc64},
iobuf::IoBufs,
iterator::LogIter,
metrics::{clock, measure},
pagecache::{LoggedUpdate, Update},
parallel_io::Pio,
reader::LogReader,
segment::{raw_segment_iter_from, SegmentAccountant},
snapshot::{advance_snapshot, PageState},
util::{arr_to_u32, arr_to_u64, u32_to_arr, u64_to_arr},
};
pub use self::{
config::{Config, ConfigBuilder},
diskptr::DiskPtr,
logger::{Log, LogRead},
materializer::{Materializer, NullMaterializer},
metrics::M,
pagecache::{CacheEntry, PageCache, PageGet, PagePtr},
reservation::Reservation,
result::{Error, Result},
segment::SegmentMode,
tx::Tx,
};
pub use sled_sync::{debug_delay, pin, unprotected, Guard};
#[doc(hidden)]
pub use self::{
constants::{
BLOB_FLUSH, BLOB_INLINE_LEN, EVIL_BYTE, FAILED_FLUSH,
INLINE_FLUSH, MINIMUM_ITEMS_PER_SEGMENT, MSG_HEADER_LEN,
SEGMENT_PAD, SEG_HEADER_LEN, SEG_TRAILER_LEN,
},
metrics::Measure,
snapshot::{read_snapshot_or_default, Snapshot},
};
pub type SegmentId = usize;
pub type LogId = u64;
pub type BlobPointer = Lsn;
pub type Lsn = i64;
pub type PageId = usize;
pub type MergeOperator = fn(
key: &[u8],
last_value: Option<&[u8]>,
new_merge: &[u8],
) -> Option<Vec<u8>>;