serverunref2.c

来自「《UNIX进程间通信》中的代码」· C语言 代码 · 共 42 行

#include	"unpipc.h"

void
servproc(void *cookie, char *dataptr, size_t datasize,
		 door_desc_t *descptr, size_t ndesc)
{
	long	arg, result;
	
	if (dataptr == DOOR_UNREF_DATA) {
		printf("door unreferenced\n");
		Door_return(NULL, 0, NULL, 0);
	}
	
	arg = *((long *) dataptr);
	printf("thread id %ld, arg = %ld\n", pr_thread_id(NULL), arg);
	sleep(6);

	result = arg * arg;
	printf("thread id %ld returning\n", pr_thread_id(NULL));
	Door_return((char *) &result, sizeof(result), NULL, 0);
}

int
main(int argc, char **argv)
{
	int	fd;

	if (argc != 2)
		err_quit("usage: server1 <server-pathname>");

		/* 4create a door descriptor and attach to pathname */
	fd = Door_create(servproc, NULL, DOOR_UNREF);

	unlink(argv[1]);
	Close(Open(argv[1], O_CREAT | O_RDWR, FILE_MODE));
	Fattach(fd, argv[1]);

		/* 4servproc() handles all client requests */
	for ( ; ; )
		pause();
}