mq_timedsend.c raw

   1  #include <mqueue.h>
   2  #include <errno.h>
   3  #include "syscall.h"
   4  
   5  #define IS32BIT(x) !((x)+0x80000000ULL>>32)
   6  #define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63))
   7  
   8  int mq_timedsend(mqd_t mqd, const char *msg, size_t len, unsigned prio, const struct timespec *at)
   9  {
  10  #ifdef SYS_mq_timedsend_time64
  11  	time_t s = at ? at->tv_sec : 0;
  12  	long ns = at ? at->tv_nsec : 0;
  13  	long r = -ENOSYS;
  14  	if (SYS_mq_timedsend == SYS_mq_timedsend_time64 || !IS32BIT(s))
  15  		r = __syscall_cp(SYS_mq_timedsend_time64, mqd, msg, len, prio,
  16  			at ? ((long long []){at->tv_sec, at->tv_nsec}) : 0);
  17  	if (SYS_mq_timedsend == SYS_mq_timedsend_time64 || r != -ENOSYS)
  18  		return __syscall_ret(r);
  19  	return syscall_cp(SYS_mq_timedsend, mqd, msg, len, prio,
  20  		at ? ((long[]){CLAMP(s), ns}) : 0);
  21  #else
  22  	return syscall_cp(SYS_mq_timedsend, mqd, msg, len, prio, at);
  23  #endif
  24  }
  25