linux-support 0.0.25

Comprehensive Linux support for namespaces, cgroups, processes, scheduling, parsing /proc, parsing /sys, signals, hyper threads, CPUS, NUMA nodes, unusual file descriptors, PCI devices and much, much more
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

// This file is part of linux-support. It is subject to the license terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/linux-support/master/COPYRIGHT. No part of linux-support, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
// Copyright © 2020 The developers of linux-support. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/linux-support/master/COPYRIGHT.


/// An offset value.
pub trait OffsetValue: Sized + Copy
{
	#[doc(hidden)]
	fn from_i128(value: i128) -> Result<Self, ()>;
	
	#[doc(hidden)]
	fn from_u128(value: u128) -> Result<Self, ()>;
	
	#[doc(hidden)]
	fn serialize<S: Serializer>(self, serializer: S) -> Result<S::Ok, S::Error>;
}

impl OffsetValue for i16
{
	#[inline(always)]
	fn from_i128(value: i128) -> Result<Self, ()>
	{
		if value >= (i16::MIN as i128) && value <= (i16::MAX as i128)
		{
			Ok(value as i16)
		}
		else
		{
			Err(())
		}
	}
	
	#[inline(always)]
	fn from_u128(value: u128) -> Result<Self, ()>
	{
		if value <= (i16::MAX as u128)
		{
			Ok(value as i16)
		}
		else
		{
			Err(())
		}
	}
	
	#[inline(always)]
	fn serialize<S: Serializer>(self, serializer: S) -> Result<S::Ok, S::Error>
	{
		serializer.serialize_i16(self)
	}
}

impl OffsetValue for i32
{
	#[inline(always)]
	fn from_i128(value: i128) -> Result<Self, ()>
	{
		if value >= (i32::MIN as i128) && value <= (i32::MAX as i128)
		{
			Ok(value as i32)
		}
		else
		{
			Err(())
		}
	}
	
	#[inline(always)]
	fn from_u128(value: u128) -> Result<Self, ()>
	{
		if value <= (i32::MAX as u128)
		{
			Ok(value as i32)
		}
		else
		{
			Err(())
		}
	}
	
	#[inline(always)]
	fn serialize<S: Serializer>(self, serializer: S) -> Result<S::Ok, S::Error>
	{
		serializer.serialize_i32(self)
	}
}

impl OffsetValue for u64
{
	#[inline(always)]
	fn from_i128(value: i128) -> Result<Self, ()>
	{
		if value >= (i64::MIN as i128) && value <= (i64::MAX as i128)
		{
			Ok(value as i64 as u64)
		}
		else
		{
			Err(())
		}
	}
	
	#[inline(always)]
	fn from_u128(value: u128) -> Result<Self, ()>
	{
		if value <= (u64::MAX as u128)
		{
			Ok(value as u64)
		}
		else
		{
			Err(())
		}
	}
	
	#[inline(always)]
	fn serialize<S: Serializer>(self, serializer: S) -> Result<S::Ok, S::Error>
	{
		serializer.serialize_u64(self)
	}
}