ref: e4952d63d49e4cd68772e4a0756e6e8e3eeb6fe5
dir: /sys/src/libthread/iowrite.c/
#include <u.h>
#include <libc.h>
#include <thread.h>
#include "threadimpl.h"
static long
_iowrite(va_list *arg)
{
	int fd;
	void *a;
	long n;
	fd = va_arg(*arg, int);
	a = va_arg(*arg, void*);
	n = va_arg(*arg, long);
	return write(fd, a, n);
}
long
iowrite(Ioproc *io, int fd, void *a, long n)
{
	return iocall(io, _iowrite, fd, a, n);
}