Files
adler32
aho_corasick
alga
approx
ascii
atty
backtrace
backtrace_sys
base64
bitflags
blas_src
block_buffer
block_padding
brotli2
brotli_sys
buf_redux
byte_tools
byteorder
cauchy
cblas_sys
cfg_if
chrono
chunked_transfer
colored
crc32fast
crossbeam
crossbeam_channel
crossbeam_deque
crossbeam_epoch
crossbeam_queue
crossbeam_utils
ctrlc
deflate
digest
dirs
error_chain
filetime
futures
generic_array
getrandom
gzip_header
hex
httparse
hyper
idna
itoa
language_tags
lapack_src
lapacke
lapacke_sys
lazy_static
libc
libm
linked_hash_map
log
matches
matrixmultiply
maybe_uninit
md5
memchr
memoffset
mime
mime_guess
multipart
nalgebra
base
geometry
linalg
ndarray
ndarray_linalg
net2
netlib_src
nix
num_complex
num_cpus
num_integer
num_rational
num_traits
opaque_debug
percent_encoding
phf
phf_shared
ppv_lite86
proc_macro2
quick_error
quote
rand
rand_chacha
rand_core
rand_distr
rawpointer
regex
regex_syntax
remove_dir_all
rosrust
rosrust_codegen
rosrust_msg
rouille
rustc_demangle
rustros_tf
ryu
safemem
scopeguard
serde
serde_bytes
serde_derive
serde_json
serde_xml_rs
sha1
siphasher
smallvec
syn
tempdir
term
thread_local
threadpool
time
tiny_http
traitobject
twoway
typeable
typenum
ucd_util
unicase
unicode_bidi
unicode_normalization
unicode_xid
url
utf8_ranges
void
xml
xml_rpc
yaml_rust
 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
#[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
use core::sync::atomic::compiler_fence;
use core::sync::atomic::Ordering;

/// Trait which allows reading from primitive atomic types with "consume" ordering.
pub trait AtomicConsume {
    /// Type returned by `load_consume`.
    type Val;

    /// Loads a value from the atomic using a "consume" memory ordering.
    ///
    /// This is similar to the "acquire" ordering, except that an ordering is
    /// only guaranteed with operations that "depend on" the result of the load.
    /// However consume loads are usually much faster than acquire loads on
    /// architectures with a weak memory model since they don't require memory
    /// fence instructions.
    ///
    /// The exact definition of "depend on" is a bit vague, but it works as you
    /// would expect in practice since a lot of software, especially the Linux
    /// kernel, rely on this behavior.
    ///
    /// This is currently only implemented on ARM and AArch64, where a fence
    /// can be avoided. On other architectures this will fall back to a simple
    /// `load(Ordering::Acquire)`.
    fn load_consume(&self) -> Self::Val;
}

#[cfg(any(target_arch = "arm", target_arch = "aarch64"))]
macro_rules! impl_consume {
    () => {
        #[inline]
        fn load_consume(&self) -> Self::Val {
            let result = self.load(Ordering::Relaxed);
            compiler_fence(Ordering::Acquire);
            result
        }
    };
}

#[cfg(not(any(target_arch = "arm", target_arch = "aarch64")))]
macro_rules! impl_consume {
    () => {
        #[inline]
        fn load_consume(&self) -> Self::Val {
            self.load(Ordering::Acquire)
        }
    };
}

macro_rules! impl_atomic {
    ($atomic:ident, $val:ty) => {
        impl AtomicConsume for ::core::sync::atomic::$atomic {
            type Val = $val;
            impl_consume!();
        }
    };
}

impl_atomic!(AtomicBool, bool);
impl_atomic!(AtomicUsize, usize);
impl_atomic!(AtomicIsize, isize);
#[cfg(all(feature = "nightly", target_has_atomic = "8"))]
impl_atomic!(AtomicU8, u8);
#[cfg(all(feature = "nightly", target_has_atomic = "8"))]
impl_atomic!(AtomicI8, i8);
#[cfg(all(feature = "nightly", target_has_atomic = "16"))]
impl_atomic!(AtomicU16, u16);
#[cfg(all(feature = "nightly", target_has_atomic = "16"))]
impl_atomic!(AtomicI16, i16);
#[cfg(all(feature = "nightly", target_has_atomic = "32"))]
impl_atomic!(AtomicU32, u32);
#[cfg(all(feature = "nightly", target_has_atomic = "32"))]
impl_atomic!(AtomicI32, i32);
#[cfg(all(feature = "nightly", target_has_atomic = "64"))]
impl_atomic!(AtomicU64, u64);
#[cfg(all(feature = "nightly", target_has_atomic = "64"))]
impl_atomic!(AtomicI64, i64);

impl<T> AtomicConsume for ::core::sync::atomic::AtomicPtr<T> {
    type Val = *mut T;
    impl_consume!();
}