From 9caa53e8d90af4a30e44b1fc77da71fc670296bf Mon Sep 17 00:00:00 2001
From: Gianluca Guida <gianluca@minix3.org>
Date: Wed, 23 Mar 2011 15:28:22 +0000
Subject: [PATCH] Add libasyn, asynchio support for netbsd libc.

---
 lib/nbsd_libasyn/Makefile   | 11 ++++++++++
 lib/nbsd_libasyn/asynchio.h | 43 +++++++++++++++++++++++++++++++++++++
 2 files changed, 54 insertions(+)
 create mode 100644 lib/nbsd_libasyn/Makefile
 create mode 100644 lib/nbsd_libasyn/asynchio.h

diff --git a/lib/nbsd_libasyn/Makefile b/lib/nbsd_libasyn/Makefile
new file mode 100644
index 000000000..6d3593d82
--- /dev/null
+++ b/lib/nbsd_libasyn/Makefile
@@ -0,0 +1,11 @@
+.include <bsd.own.mk>
+.PATH: 	${MINIXSRCDIR}/lib/libc/asyn 
+LIB=	asyn
+INCS=	asynchio.h
+INCSDIR= /usr/netbsd/include/sys
+
+
+SRCS+=	asyn_cancel.c asyn_close.c asyn_init.c asyn_pending.c asyn_read.c \
+	asyn_special.c asyn_synch.c asyn_wait.c asyn_write.c
+
+.include <bsd.lib.mk>
diff --git a/lib/nbsd_libasyn/asynchio.h b/lib/nbsd_libasyn/asynchio.h
new file mode 100644
index 000000000..726dd1ec4
--- /dev/null
+++ b/lib/nbsd_libasyn/asynchio.h
@@ -0,0 +1,43 @@
+/*	asynchio.h - Asynchronous I/O			Author: Kees J. Bot
+ *								7 Jul 1997
+ * Minix-vmd compatible asynchio(3) using BSD select(2).
+ */
+#ifndef _SYS__ASYNCHIO_H
+#define _SYS__ASYNCHIO_H
+
+#include <sys/select.h>			/* for FD_SETSIZE */
+
+#define SEL_READ	0		/* Code for a read. */
+#define SEL_WRITE	1		/* Code for a write. */
+#define SEL_EXCEPT	2		/* Code for some exception. */
+#define SEL_NR		3		/* Number of codes. */
+
+struct _asynfd {
+	int		afd_seen;	/* Set if we manage this descriptor. */
+	int		afd_flags;	/* File flags by fcntl(fd, F_GETFL). */
+	int		afd_state[SEL_NR];  /* Operation state. */
+};
+
+typedef struct {
+	int		asyn_more;	/* Set if more to do before blocking. */
+	struct _asynfd	asyn_afd[FD_SETSIZE];
+	fd_set		asyn_fdset[SEL_NR];	/* Select() fd sets. */
+} asynchio_t;
+
+#define ASYN_INPROGRESS	EAGAIN		/* Errno code telling "nothing yet." */
+#define ASYN_NONBLOCK	0x01		/* If asyn_wait() mustn't block. */
+
+struct timeval;
+
+void asyn_init(asynchio_t *_asyn);
+ssize_t asyn_read(asynchio_t *_asyn, int _fd, void *_buf, size_t _len);
+ssize_t asyn_write(asynchio_t *_asyn, int _fd, const void *_buf, size_t _len);
+int asyn_special(asynchio_t *_asyn, int _fd, int _op);
+int asyn_result(asynchio_t *_asyn, int _fd, int _op, int _result);
+int asyn_wait(asynchio_t *_asyn, int _flags, struct timeval *to);
+int asyn_cancel(asynchio_t *_asyn, int _fd, int _op);
+int asyn_pending(asynchio_t *_asyn, int _fd, int _op);
+int asyn_synch(asynchio_t *_asyn, int _fd);
+int asyn_close(asynchio_t *_asyn, int _fd);
+
+#endif /* _SYS__ASYNCHIO_H */