|
sl@0
|
1 |
// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
|
|
sl@0
|
2 |
// All rights reserved.
|
|
sl@0
|
3 |
// This component and the accompanying materials are made available
|
|
sl@0
|
4 |
// under the terms of "Eclipse Public License v1.0"
|
|
sl@0
|
5 |
// which accompanies this distribution, and is available
|
|
sl@0
|
6 |
// at the URL "http://www.eclipse.org/legal/epl-v10.html".
|
|
sl@0
|
7 |
//
|
|
sl@0
|
8 |
// Initial Contributors:
|
|
sl@0
|
9 |
// Nokia Corporation - initial contribution.
|
|
sl@0
|
10 |
//
|
|
sl@0
|
11 |
// Contributors:
|
|
sl@0
|
12 |
//
|
|
sl@0
|
13 |
// Description:
|
|
sl@0
|
14 |
// Name : nice.cpp
|
|
sl@0
|
15 |
// Part of : LIBC
|
|
sl@0
|
16 |
// Contains the source for fchdir
|
|
sl@0
|
17 |
// Version : 1.0
|
|
sl@0
|
18 |
//
|
|
sl@0
|
19 |
|
|
sl@0
|
20 |
|
|
sl@0
|
21 |
|
|
sl@0
|
22 |
#include <sys/time.h>
|
|
sl@0
|
23 |
#include <sys/resource.h>
|
|
sl@0
|
24 |
#include <errno.h>
|
|
sl@0
|
25 |
#include <e32std.h>
|
|
sl@0
|
26 |
#include <e32const.h>
|
|
sl@0
|
27 |
#include <unistd.h>
|
|
sl@0
|
28 |
|
|
sl@0
|
29 |
extern "C" {
|
|
sl@0
|
30 |
|
|
sl@0
|
31 |
/*
|
|
sl@0
|
32 |
The function nice() increases or decreases the priority value by
|
|
sl@0
|
33 |
adding the value 'incr' to the current priority.
|
|
sl@0
|
34 |
It internally uses getpriority and setpriority to set the priority
|
|
sl@0
|
35 |
to new value.
|
|
sl@0
|
36 |
It returns the new value of the priority, which shall be in the range
|
|
sl@0
|
37 |
of -15 to 19. -1 is a legitimate return value, so the user has to check
|
|
sl@0
|
38 |
the errno to be sure of failure.
|
|
sl@0
|
39 |
*/
|
|
sl@0
|
40 |
EXPORT_C int nice(int incr)
|
|
sl@0
|
41 |
{
|
|
sl@0
|
42 |
|
|
sl@0
|
43 |
int retGetPri = -1;
|
|
sl@0
|
44 |
int retSetPri = -1;
|
|
sl@0
|
45 |
int retVal = -1;
|
|
sl@0
|
46 |
|
|
sl@0
|
47 |
if(((retGetPri = getpriority(PRIO_PROCESS, 0)) == -1) && (errno))
|
|
sl@0
|
48 |
{
|
|
sl@0
|
49 |
errno = ENOSYS;
|
|
sl@0
|
50 |
}
|
|
sl@0
|
51 |
else
|
|
sl@0
|
52 |
{
|
|
sl@0
|
53 |
retSetPri = setpriority(PRIO_PROCESS, 0, retGetPri + incr);
|
|
sl@0
|
54 |
if(!retSetPri)
|
|
sl@0
|
55 |
{
|
|
sl@0
|
56 |
retVal = 0;
|
|
sl@0
|
57 |
}
|
|
sl@0
|
58 |
}
|
|
sl@0
|
59 |
return retVal;
|
|
sl@0
|
60 |
}
|
|
sl@0
|
61 |
|
|
sl@0
|
62 |
} //extern "C"
|