thr_setprio(3C) 可用来将当前进程内 tid 所指定线程的优先级更改为 newprio 所指定的优先级。对于 POSIX 线程,请参见pthread_setschedparam 语法。
#include <thread.h> int thr_setprio(thread_t tid, int newprio)
缺省情况下,线程是基于范围从 0(最不重要)到 127(最重要)的固定优先级来调度的。
thread_t tid; int ret; int newprio = 20; /* suspended thread creation */ ret = thr_create(NULL, NULL, func, arg, THR_SUSPENDED, &tid); /* set the new priority of suspended child thread */ ret = thr_setprio(tid, newprio); /* suspended child thread starts executing with new priority */ ret = thr_continue(tid);