Struct tikv_jemalloc_ctl::thread::deallocatedp

pub struct deallocatedp;

Access to the total number of bytes deallocated by the current thread.

The read method doesn’t return the value directly, but actually a pointer to the value. This allows for very fast repeated lookup, since there is no function call overhead. The pointer type cannot be sent to other threads, but deallocatedp::read can be called on different threads and will return the appropriate pointer for each of them.

Example

use tikv_jemalloc_ctl::thread;
let deallocated = thread::deallocatedp::mib().unwrap();
let deallocated = deallocated.read().unwrap();

let a = deallocated.get();
let buf = vec![0; 1024 * 1024];
let b = deallocated.get();
drop(buf);
let c = deallocated.get();

assert_eq!(a, b);
assert!(b < c);

Implementations

impl deallocatedp

pub fn mib() -> Result<deallocatedp_mib>

Returns Management Information Base (MIB)

This value can be used to access the key without doing string lookup.

pub fn name() -> &'static Name

Key [::keys::Name].

impl deallocatedp

pub fn read() -> Result<ThreadLocal<u64>>

Reads value using string API.