Re: aio_suspend can not block

On 12月14日, 下午3时57分, ben <lizp....@xxxxxxxxx> wrote:
my_aiocb.aio_buf = foo;
my_aiocb.aio_fildes = fileno(file);
my_aiocb.aio_nbytes = 10;
my_aiocb.aio_offset = 0;
my_aiocb.aio_sigevent.sigev_notify = SIGEV_THREAD;
my_aiocb.aio_sigevent.sigev_notify_function = aio_handler;
my_aiocb.aio_sigevent.sigev_value.sival_int = 0;
my_aiocb.aio_sigevent.sigev_notify_attributes = NULL;

//aio_write(&my_aiocb);
const struct aiocb *cblist[2] = {&my_aiocb, NULL};
struct timespec rem = { 10000000, 0 };
int ret = 0;
while ( ret == 0)
//while(1)
{
ret = aio_suspend( cblist, 2, &rem );
printf("get one signal, reg is %d\n", ret);
sleep(1);
}

I think aio_suspend should block, because no signal, but i am wrong,
and the out is :
get one signal, reg is 0
get one signal, reg is 0
get one signal, reg is 0
get one signal, reg is 0
get one signal, reg is 0
get one signal, reg is 0
get one signal, reg is 0
get one signal, reg is 0

why ? thank u

找到原因了，ret = aio_suspend( cblist, 2, &rem );只是阻塞IO操作，由于读的东西太少，很快读完了，所以我
认
为没有阻塞，其实已经阻塞了，用一个大文件读取的时候就看出来了。确实阻塞了。
.