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

//! mlock / munlock

#![cfg(feature = "use_os")]


/// Unix mlock.
#[cfg(unix)]
pub unsafe fn mlock<T>(addr: *mut T, len: usize) -> bool {
    #[cfg(target_os = "linux")]
    ::libc::madvise(addr as *mut ::libc::c_void, len, ::libc::MADV_DONTDUMP);

    #[cfg(freebsdlike)]
    ::libc::madvise(addr as *mut ::libc::c_void, len, ::libc::MADV_NOCORE);

    ::libc::mlock(addr as *mut ::libc::c_void, len) == 0
}

/// Windows VirtualLock.
#[cfg(windows)]
pub unsafe fn mlock<T>(addr: *mut T, len: usize) -> bool {
    ::kernel32::VirtualLock(addr as ::winapi::LPVOID, len as ::winapi::SIZE_T) != 0
}

/// Unix munlock.
#[cfg(unix)]
pub unsafe fn munlock<T>(addr: *mut T, len: usize) -> bool {
    ::memzero(addr, len);

    #[cfg(target_os = "linux")]
    ::libc::madvise(addr as *mut ::libc::c_void, len, ::libc::MADV_DODUMP);

    #[cfg(freebsdlike)]
    ::libc::madvise(addr as *mut ::libc::c_void, len, ::libc::MADV_CORE);

    ::libc::munlock(addr as *mut ::libc::c_void, len) == 0
}

/// Windows VirtualUnlock.
#[cfg(windows)]
pub unsafe fn munlock<T>(addr: *mut T, len: usize) -> bool {
    ::memzero(addr, len);
    ::kernel32::VirtualUnlock(addr as ::winapi::LPVOID, len as ::winapi::SIZE_T) != 0
}