package poll

import (
	"syscall"
	"unsafe"
)

func writev(fd int, iovecs []syscall.Iovec) (uintptr, error) {
	var (
		r uintptr
		e syscall.Errno
	)
	for {
		r, _, e = syscall.Syscall(syscall.SYS_WRITEV, uintptr(fd), uintptr(unsafe.Pointer(&iovecs[0])), uintptr(len(iovecs)))
		if e != syscall.EINTR {
			break
		}
	}
	if e != 0 {
		return r, e
	}
	return r, nil

	SYS_QUOTACTL               = 60
	SYS_GETDENTS64             = 61
	SYS_LSEEK                  = 62
	SYS_READ                   = 63
	SYS_WRITE                  = 64
	SYS_READV                  = 65
	SYS_WRITEV                 = 66
	SYS_PREAD64                = 67
	SYS_PWRITE64               = 68
	SYS_PREADV                 = 69
	SYS_PWRITEV                = 70
	SYS_SENDFILE               = 71
	SYS_PSELECT6               = 72

	SYS_QUOTACTL               = 60
	SYS_GETDENTS64             = 61
	SYS_LSEEK                  = 62
	SYS_READ                   = 63
	SYS_WRITE                  = 64
	SYS_READV                  = 65
	SYS_WRITEV                 = 66
	SYS_PREAD64                = 67
	SYS_PWRITE64               = 68
	SYS_PREADV                 = 69
	SYS_PWRITEV                = 70
	SYS_SENDFILE               = 71
	SYS_PSELECT6               = 72

	SYS_RT_SIGACTION           = 5013
	SYS_RT_SIGPROCMASK         = 5014
	SYS_IOCTL                  = 5015
	SYS_PREAD64                = 5016
	SYS_PWRITE64               = 5017
	SYS_READV                  = 5018
	SYS_WRITEV                 = 5019
	SYS_ACCESS                 = 5020
	SYS_PIPE                   = 5021
	SYS__NEWSELECT             = 5022
	SYS_SCHED_YIELD            = 5023
	SYS_MREMAP                 = 5024

	SYS_RT_SIGACTION           = 5013
	SYS_RT_SIGPROCMASK         = 5014
	SYS_IOCTL                  = 5015
	SYS_PREAD64                = 5016
	SYS_PWRITE64               = 5017
	SYS_READV                  = 5018
	SYS_WRITEV                 = 5019
	SYS_ACCESS                 = 5020
	SYS_PIPE                   = 5021
	SYS__NEWSELECT             = 5022
	SYS_SCHED_YIELD            = 5023
	SYS_MREMAP                 = 5024

	SYS_RT_SIGPROCMASK         = 14
	SYS_RT_SIGRETURN           = 15
	SYS_IOCTL                  = 16
	SYS_PREAD64                = 17
	SYS_PWRITE64               = 18
	SYS_READV                  = 19
	SYS_WRITEV                 = 20
	SYS_ACCESS                 = 21
	SYS_PIPE                   = 22
	SYS_SELECT                 = 23
	SYS_SCHED_YIELD            = 24
	SYS_MREMAP                 = 25
	SYS_MSYNC                  = 26

	SYS_PERSONALITY            = 136
	SYS_AFS_SYSCALL            = 137
	SYS_GETDENTS               = 141
	SYS_FLOCK                  = 143
	SYS_MSYNC                  = 144
	SYS_READV                  = 145
	SYS_WRITEV                 = 146
	SYS_GETSID                 = 147
	SYS_FDATASYNC              = 148
	SYS__SYSCTL                = 149
	SYS_MLOCK                  = 150
	SYS_MUNLOCK                = 151

	SYS_QUOTACTL                = 60
	SYS_GETDENTS64              = 61
	SYS_LSEEK                   = 62
	SYS_READ                    = 63
	SYS_WRITE                   = 64
	SYS_READV                   = 65
	SYS_WRITEV                  = 66
	SYS_PREAD64                 = 67
	SYS_PWRITE64                = 68
	SYS_PREADV                  = 69
	SYS_PWRITEV                 = 70
	SYS_SENDFILE                = 71

	SYS_QUOTACTL                = 60
	SYS_GETDENTS64              = 61
	SYS_LSEEK                   = 62
	SYS_READ                    = 63
	SYS_WRITE                   = 64
	SYS_READV                   = 65
	SYS_WRITEV                  = 66
	SYS_PREAD64                 = 67
	SYS_PWRITE64                = 68
	SYS_PREADV                  = 69
	SYS_PWRITEV                 = 70
	SYS_SENDFILE                = 71

	SYS_THRKILL        = 119 // { int sys_thrkill(pid_t tid, int signum, void *tcb); }
	SYS_READV          = 120 // { ssize_t sys_readv(int fd, \
	SYS_WRITEV         = 121 // { ssize_t sys_writev(int fd, \
	SYS_KILL           = 122 // { int sys_kill(int pid, int signum); }
	SYS_FCHOWN         = 123 // { int sys_fchown(int fd, uid_t uid, gid_t gid); }