| /* | |
| +----------------------------------------------------------------------+ | |
| | Copyright (c) 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: | | |
| | https://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> | | |
| +----------------------------------------------------------------------+ | |
| */ | |
| /* | |
| * 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 < -9 | HIGH_PRIORITY_CLASS | | |
| * +-----------------------+-----------------------------+ | |
| * | priority < -4 | ABOVE_NORMAL_PRIORITY_CLASS | | |
| * +-----------------------+-----------------------------+ | |
| * | priority > 4 | BELOW_NORMAL_PRIORITY_CLASS | | |
| * +-----------------------+-----------------------------+ | |
| * | priority > 9 | IDLE_PRIORITY_CLASS | | |
| * +-----------------------+-----------------------------+ | |
| * | |
| * If a value is between -4 and 4 (inclusive), then the priority will be set | |
| * to NORMAL_PRIORITY_CLASS. | |
| * | |
| * These values tries to mimic that of the UNIX version of nice(). | |
| * | |
| * This is applied to the main process, not per thread, although this could | |
| * be implemented using SetThreadPriority() at one point. | |
| * | |
| * Note, the following priority classes are left out with intention: | |
| * | |
| * . REALTIME_PRIORITY_CLASS | |
| * Realtime priority class requires special system permissions to set, and | |
| * can be dangerous in certain cases. | |
| * | |
| * . PROCESS_MODE_BACKGROUND_BEGIN | |
| * . PROCESS_MODE_BACKGROUND_END | |
| * Process mode is not covered because it can easily forgotten to be changed | |
| * back and can cause unforeseen side effects that is hard to debug. Besides | |
| * that, these do generally not really fit into making a Windows somewhat | |
| * compatible nice() function. | |
| */ | |
| PHPAPI int nice(zend_long p) | |
| { | |
| DWORD dwFlag = NORMAL_PRIORITY_CLASS; | |
| if (p < -9) { | |
| dwFlag = HIGH_PRIORITY_CLASS; | |
| } else if (p < -4) { | |
| dwFlag = ABOVE_NORMAL_PRIORITY_CLASS; | |
| } else if (p > 9) { | |
| dwFlag = IDLE_PRIORITY_CLASS; | |
| } else if (p > 4) { | |
| dwFlag = BELOW_NORMAL_PRIORITY_CLASS; | |
| } | |
| if (!SetPriorityClass(GetCurrentProcess(), dwFlag)) { | |
| return -1; | |
| } | |
| return 0; | |
| } | |