1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
|
#include <mqueue.h>
#include <errno.h>
#include "syscall.h"
#define IS32BIT(x) !((x)+0x80000000ULL>>32)
#define CLAMP(x) (int)(IS32BIT(x) ? (x) : 0x7fffffffU+((0ULL+(x))>>63))
ssize_t mq_timedreceive(mqd_t mqd, char *restrict msg, size_t len, unsigned *restrict prio, const struct timespec *restrict at)
{
#ifdef SYS_mq_timedreceive_time64
time_t s = at ? at->tv_sec : 0;
long ns = at ? at->tv_nsec : 0;
long r = -ENOSYS;
if (SYS_mq_timedreceive == SYS_mq_timedreceive_time64 || !IS32BIT(s))
r = __syscall_cp(SYS_mq_timedreceive_time64, mqd, msg, len, prio,
at ? ((long long []){at->tv_sec, at->tv_nsec}) : 0);
if (SYS_mq_timedreceive == SYS_mq_timedreceive_time64 || r != -ENOSYS)
return __syscall_ret(r);
return syscall_cp(SYS_mq_timedreceive, mqd, msg, len, prio,
at ? ((long[]){CLAMP(s), ns}) : 0);
#else
return syscall_cp(SYS_mq_timedreceive, mqd, msg, len, prio, at);
#endif
}
|
