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Diffstat (limited to 'win32/nice.c')
| -rw-r--r-- | win32/nice.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/win32/nice.c b/win32/nice.c new file mode 100644 index 0000000000..db26cc1aa6 --- /dev/null +++ b/win32/nice.c @@ -0,0 +1,83 @@ +/* + +----------------------------------------------------------------------+ + | 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 < -14 | REALTIME_PRIORITY_CLASS | + * +-----------------------+-----------------------------+ + * | 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. + */ + +PHPAPI int nice(zend_long p) +{ + DWORD dwFlag = NORMAL_PRIORITY_CLASS; + + if (p < -14) { + dwFlag = REALTIME_PRIORITY_CLASS; + } else 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; +} + +/* + * Local variables: + * tab-width: 4 + * c-basic-offset: 4 + * End: + * vim600: sw=4 ts=4 fdm=marker + * vim<600: sw=4 ts=4 + */ |