pcntl_setpriority
(PHP 5)
pcntl_setpriority — Change the priority of any process
说明
bool pcntl_setpriority
( int $priority
[, int $pid
[, int $process_identifier
]] )
pcntl_setpriority() sets the priority of
pid
.
参数
-
priority
-
priority
is generally a value in the range
-20 to 20. The default priority
is 0 while a lower numerical value causes more
favorable scheduling. Because priority levels can differ between
system types and kernel versions, please see your system's setpriority(2)
man page for specific details.
-
pid
-
If not specified, the pid of the current process is used.
-
process_identifier
-
One of PRIO_PGRP, PRIO_USER
or PRIO_PROCESS.
返回值
如果成功则返回 TRUE，失败则返回 FALSE。