patch-2.3.18 linux/drivers/char/drm/sigio.c

• Lines: 83
• Date: Tue Sep 7 14:51:28 1999
• Orig file: v2.3.17/linux/drivers/char/drm/sigio.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.17/linux/drivers/char/drm/sigio.c linux/drivers/char/drm/sigio.c
@@ -0,0 +1,82 @@
+/* sigio.c -- Support for SIGIO handler -*- linux-c -*-
+ * Created: Thu Jun  3 15:39:18 1999 by faith@precisioninsight.com
+ * Revised: Thu Jun  3 16:16:35 1999 by faith@precisioninsight.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ * 
+ * $PI: xc/programs/Xserver/hw/xfree86/os-support/shared/sigio.c,v 1.2 1999/06/14 21:11:29 faith Exp $
+ * $XFree86: xc/programs/Xserver/hw/xfree86/os-support/shared/sigio.c,v 1.2 1999/06/14 12:02:11 dawes Exp $
+ * 
+ */
+
+
+#ifdef XFree86Server
+# include "X.h"
+# include "xf86.h"
+# include "xf86drm.h"
+# include "xf86_OSlib.h"
+# include "xf86drm.h"
+#else
+# include <unistd.h>
+# include <signal.h>
+# include <fcntl.h>
+#endif
+
+/*
+ * Linux libc5 defines FASYNC, but not O_ASYNC.  Don't know if it is
+ * functional or not.
+ */
+#if defined(FASYNC) && !defined(O_ASYNC)
+#  define O_ASYNC FASYNC
+#endif
+
+int
+xf86InstallSIGIOHandler(int fd, void (*f)(int))
+{
+    struct sigaction sa;
+    struct sigaction osa;
+
+    sigemptyset(&sa.sa_mask);
+    sigaddset(&sa.sa_mask, SIGIO);
+    sa.sa_flags   = 0;
+    sa.sa_handler = f;
+    sigaction(SIGIO, &sa, &osa);
+    fcntl(fd, F_SETOWN, getpid());
+    fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_ASYNC);
+    return 0;
+}
+
+int
+xf86RemoveSIGIOHandler(int fd)
+{
+    struct sigaction sa;
+    struct sigaction osa;
+
+    sigemptyset(&sa.sa_mask);
+    sigaddset(&sa.sa_mask, SIGIO);
+    sa.sa_flags   = 0;
+    sa.sa_handler = SIG_DFL;
+    fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) & ~O_ASYNC);
+    sigaction(SIGIO, &sa, &osa);
+    return 0;
+}