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Kalle Sommer Nielsen
87 lines
3.2 KiB
C
87 lines
3.2 KiB
C
/*
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+----------------------------------------------------------------------+
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| PHP Version 7 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-2016 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Kalle Sommer Nielsen <kalle@php.net> |
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+----------------------------------------------------------------------+
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*/
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#include <php.h>
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#include "nice.h"
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/*
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* Basic Windows implementation for the nice() function.
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*
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* This implementation uses SetPriorityClass() as a backend for defining
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* a process priority.
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*
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* The following values of inc, defines the value sent to SetPriorityClass():
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*
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* +-----------------------+-----------------------------+
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* | Expression | Priority type |
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* +-----------------------+-----------------------------+
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* | priority > 23 | REALTIME_PRIORITY_CLASS |
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* +-----------------------+-----------------------------+
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* | priority > 12 | HIGH_PRIORITY_CLASS |
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* +-----------------------+-----------------------------+
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* | priority > 9 | ABOVE_NORMAL_PRIORITY_CLASS |
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* +-----------------------+-----------------------------+
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* | priority > 7 | NORMAL_PRIORITY_CLASS |
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* +-----------------------+-----------------------------+
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* | priority > 5 | IDLE_PRIORITY_CLASS |
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* +-----------------------+-----------------------------+
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* | priority > 3 | BELOW_NORMAL_PRIORITY_CLASS |
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* +-----------------------+-----------------------------+
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*
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* Note, these values tries to mimic the outpof of wmic.
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*
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* If the value is below 4, then the process priority will default to
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* NORMAL_PRIORITY_CLASS and anything above 23 will always be
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* REALTIME_PRIORITY_CLASS.
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*
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* This is applied to the main process, not per thread, although this could
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* be implemented using SetThreadPriority() at one point.
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*/
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PHPAPI int nice(zend_long p)
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{
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DWORD dwFlag = NORMAL_PRIORITY_CLASS;
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if (p > 23) {
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dwFlag = REALTIME_PRIORITY_CLASS;
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} else if (p > 12) {
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dwFlag = HIGH_PRIORITY_CLASS;
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} else if (p > 9) {
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dwFlag = ABOVE_NORMAL_PRIORITY_CLASS;
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} else if (p > 5 && p < 7) {
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dwFlag = IDLE_PRIORITY_CLASS;
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} else if (p > 3 && p < 7) {
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dwFlag = BELOW_NORMAL_PRIORITY_CLASS;
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}
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if (!SetPriorityClass(GetCurrentProcess(), dwFlag)) {
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return -1;
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}
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return 0;
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}
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim600: sw=4 ts=4 fdm=marker
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* vim<600: sw=4 ts=4
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*/
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