From e2abcdca396661cbe0ae2ddb13d5c2b85682c13a Mon Sep 17 00:00:00 2001
From: Cem Keylan <cem@ckyln.com>
Date: Fri, 16 Oct 2020 17:41:25 +0300
Subject: initial commit

---
 sys/sys/sigio.h | 95 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 sys/sys/sigio.h

(limited to 'sys/sys/sigio.h')

diff --git a/sys/sys/sigio.h b/sys/sys/sigio.h
new file mode 100644
index 0000000..a20f983
--- /dev/null
+++ b/sys/sys/sigio.h
@@ -0,0 +1,95 @@
+/*	$OpenBSD: sigio.h,v 1.4 2020/01/08 16:27:42 visa Exp $	*/
+
+/*-
+ * Copyright (c) 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)filedesc.h	8.1 (Berkeley) 6/2/93
+ * $FreeBSD: head/sys/sys/sigio.h 326023 2017-11-20 19:43:44Z pfg $
+ */
+
+#ifndef _SYS_SIGIO_H_
+#define _SYS_SIGIO_H_
+
+struct sigio;
+LIST_HEAD(sigiolst, sigio);
+
+/*
+ * sigio registration
+ *
+ * Locking:
+ *	S	sigio_lock
+ */
+struct sigio_ref {
+	struct sigio	*sir_sigio;	/* [S] associated sigio struct */
+};
+
+#ifdef _KERNEL
+
+/*
+ * This structure holds the information needed to send a SIGIO or
+ * a SIGURG signal to a process or process group when new data arrives
+ * on a device or socket.  The structure is placed on an LIST belonging
+ * to the proc or pgrp so that the entire list may be revoked when the
+ * process exits or the process group disappears.
+ *
+ * Locking:
+ *	I	immutable after creation
+ *	S	sigio_lock
+ */
+struct sigio {
+	union {
+		struct	process *siu_proc;
+					/* [I] process to receive
+					 *     SIGIO/SIGURG */
+		struct	pgrp *siu_pgrp; /* [I] process group to receive ... */
+	} sio_u;
+	LIST_ENTRY(sigio) sio_pgsigio;	/* [S] sigio's for process or group */
+	struct	sigio_ref *sio_myref;	/* [I] location of the pointer that
+					 *     holds the reference to
+					 *     this structure */
+	struct	ucred *sio_ucred;	/* [I] current credentials */
+	pid_t	sio_pgid;		/* [I] pgid for signals */
+};
+#define	sio_proc	sio_u.siu_proc
+#define	sio_pgrp	sio_u.siu_pgrp
+
+static inline void
+sigio_init(struct sigio_ref *sir)
+{
+	sir->sir_sigio = NULL;
+}
+
+void	sigio_copy(struct sigio_ref *, struct sigio_ref *);
+void	sigio_free(struct sigio_ref *);
+void	sigio_freelist(struct sigiolst *);
+void	sigio_getown(struct sigio_ref *, u_long, caddr_t);
+int	sigio_setown(struct sigio_ref *, u_long, caddr_t);
+
+#endif /* _KERNEL */
+
+#endif /* _SYS_SIGIO_H_ */
-- 
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