以下程序无法在pthread中分配属性。当我尝试使用SCHED_FIFO以外的其他方法创建pthread_attr_setschedpolicy时，我无法成功设置线程属性。与PTHREAD_SCOPE_SYSTEM范围类似的情况。
当前创建线程有什么问题？
如何在特定时间/事件中安排线程？
#include <stdio.h>
#include <pthread.h>
#include <time.h>
#include <errno.h>
void *process_ND(void *arg);
void *process_PFD(void *arg);
void *process_EICAS(void *arg);
void *process_IO(void *arg);
int main()
{
pthread_t thread_PFD, thread_EICAS, thread_ND, thread_IO;
pthread_attr_t attr_PFD, attr_EICAS, attr_ND, attr_IO;
pthread_attr_init(&attr_PFD);
pthread_attr_init(&attr_EICAS);
pthread_attr_init(&attr_ND);
pthread_attr_init(&attr_IO);
if( (0 != pthread_attr_setschedpolicy(&attr_PFD, SCHED_FIFO)) ||
(0 != pthread_attr_setinheritsched(&attr_PFD, PTHREAD_EXPLICIT_SCHED)) ||
(0 != pthread_attr_setscope(&attr_PFD, PTHREAD_SCOPE_PROCESS)) )
{
printf("ERROR.... in setting the pthread Schedule, Policy, Scolpe attributes for PFD\n");//, error_num, strerror(error_num));
}
/* Set the EICAS thread attributes as desired */
if( (0 != pthread_attr_setschedpolicy(&attr_EICAS, SCHED_FIFO)) ||
(0 != pthread_attr_setinheritsched(&attr_EICAS, PTHREAD_EXPLICIT_SCHED)) ||
(0 != pthread_attr_setscope(&attr_EICAS, PTHREAD_SCOPE_PROCESS)) )
{
printf("ERROR.... in setting the pthread Schedule, Policy, Scolpe attributes for EICAS\n");
}
/* Set the ND thread attributes as desired */
if( (0 != pthread_attr_setinheritsched(&attr_ND, PTHREAD_EXPLICIT_SCHED)) ||
(0 != pthread_attr_setschedpolicy(&attr_ND, SCHED_FIFO)) ||
(0 != pthread_attr_setscope(&attr_ND, PTHREAD_SCOPE_PROCESS)) )
{
printf("ERROR.... in setting the pthread Schedule, Policy, Scolpe attributes for ND\n");
}
/* Set the IO thread attributes as desired */
if( (0 != pthread_attr_setinheritsched(&attr_IO, PTHREAD_EXPLICIT_SCHED)) ||
(0 != pthread_attr_setschedpolicy(&attr_IO, SCHED_FIFO)) ||
(0 != pthread_attr_setscope(&attr_IO, PTHREAD_SCOPE_PROCESS)) )
{
printf("ERROR.... in setting the pthread Schedule, Policy, Scolpe attributes for IO\n");
}
//threadStatus_PFD = pthread_create(&thread_PFD, &attr_PFD, process_PFD, (void*)(pthread_array_param+0));
threadStatus_IO = pthread_create(&thread_IO, &attr_IO, process_IO, (void*)NULL);
threadStatus_PFD = pthread_create(&thread_PFD, &attr_PFD, process_PFD, (void*)NULL);
threadStatus_ND = pthread_create(&thread_ND, &attr_ND, process_ND, (void*)NULL);
threadStatus_EICAS = pthread_create(&thread_EICAS, &attr_EICAS, process_EICAS, (void*)NULL);
printf("Created all the threads\n");
return 0;
}
void *process_ND(void *arg)
{
}
void *process_PFD(void *arg)
{
}
void *process_EICAS(void *arg)
{
}
void *process_IO(void *arg)
{
}