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/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2016 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Kalle Sommer Nielsen <kalle@php.net> |
+----------------------------------------------------------------------+
*/
#include <php.h>
#include "nice.h"
/*
* Basic Windows implementation for the nice() function.
*
* This implementation uses SetPriorityClass() as a backend for defining
* a process priority.
*
* The following values of inc, defines the value sent to SetPriorityClass():
*
* +-----------------------+-----------------------------+
* | Expression | Priority type |
* +-----------------------+-----------------------------+
* | priority > 5 | REALTIME_PRIORITY_CLASS |
* +-----------------------+-----------------------------+
* | priority == 5 | HIGH_PRIORITY_CLASS |
* +-----------------------+-----------------------------+
* | priority > 0 | ABOVE_NORMAL_PRIORITY_CLASS |
* +-----------------------+-----------------------------+
* | priority == 0 | NORMAL_PRIORITY_CLASS |
* +-----------------------+-----------------------------+
* | priority < -5 | BELOW_NORMAL_PRIORITY_CLASS |
* +-----------------------+-----------------------------+
* | priority < -10 | IDLE_PRIORITY_CLASS |
* +-----------------------+-----------------------------+
*
* This is applied to the main process, not per thread, although this could
* be implemented using SetThreadPriority() at one point.
*/
PHPAPI int nice(zend_long p)
{
DWORD dwFlag = NORMAL_PRIORITY_CLASS;
if (p > 5) {
dwFlag = REALTIME_PRIORITY_CLASS;
} else if (p == 5) {
dwFlag = HIGH_PRIORITY_CLASS;
} else if (p > 0) {
dwFlag = ABOVE_NORMAL_PRIORITY_CLASS;
} else if (p < 0 && p < -5) {
dwFlag = BELOW_NORMAL_PRIORITY_CLASS;
} else if (p < -10) {
dwFlag = IDLE_PRIORITY_CLASS;
}
if (!SetPriorityClass(GetCurrentProcess(), dwFlag)) {
return -1;
}
return 0;
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
|
