继this StackOverflow的问题的如何创建正确的 整数面具？

Following the answer from this StackOverflow question how do I create the proper integer for mask?

我做了一些google搜索的一切，我发现使用 CPU_SET 宏从 sched.h中，但它运行在 cpu_set_t 结构使用NDK时，这是不确定的。当尝试使用 CPU_SET 链接给我未定义的引用错误（尽管我反对的pthread链接）。

I made some googling and the everything I found uses CPU_SET macro from sched.h but it operates on cpu_set_t structures which are undefined when using NDK. When try using CPU_SET linker gives me undefined reference error (even though I link against pthread).

推荐答案

那么，在最后，我发现这是直接从 sched.h中采取了一些版本。林张贴此位置如果任何人有同样的问题，不希望花时间寻找它。这是非常有用的。

Well, in the end I found some version which was taken directly from sched.h. Im posting this here if anyone has the same problem and doesn't want to spend the time searching for it. This is quite useful.

#define CPU_SETSIZE 1024
#define __NCPUBITS  (8 * sizeof (unsigned long))
typedef struct
{
   unsigned long __bits[CPU_SETSIZE / __NCPUBITS];
} cpu_set_t;

#define CPU_SET(cpu, cpusetp) \
  ((cpusetp)->__bits[(cpu)/__NCPUBITS] |= (1UL << ((cpu) % __NCPUBITS)))
#define CPU_ZERO(cpusetp) \
  memset((cpusetp), 0, sizeof(cpu_set_t))

这工作得很好，当在参数类型原 setCurrentThreadAffinityMask （从问题中提到的职位）仅被替换 cpu_set_t 。

This works well when the parameter type in the original setCurrentThreadAffinityMask (from the post mentioned in the question) is simply replaced with cpu_set_t.