The R13B03 release.OTP_R13B03

1 files changed, 81 insertions, 0 deletions

diff --git a/erts/emulator/drivers/unix/sig_drv.c b/erts/emulator/drivers/unix/sig_drv.c
new file mode 100644
index 0000000000..aab5d63a40
--- /dev/null
+++ b/erts/emulator/drivers/unix/sig_drv.c
@@ -0,0 +1,81 @@
+/*
+ * %CopyrightBegin%
+ * 
+ * Copyright Ericsson AB 1996-2009. All Rights Reserved.
+ * 
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ * 
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ * 
+ * %CopyrightEnd%
+ */
+
+/* Purpose: demonstrate how to include interupt handlers in erlang */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include "sys.h"
+#include "erl_driver.h"
+#include <signal.h>
+#include <stdio.h>
+
+static ErlDrvData sig_start(ErlDrvPort, char*);
+static int sig_init(void);
+static void sig_stop(ErlDrvData), doio(ErlDrvData, ErlDrvEvent);
+
+ErlDrvEntry sig_driver_entry = {
+    sig_init,
+    sig_start,
+    sig_stop,
+    NULL,
+    doio,
+    NULL,
+    "sig_test"
+};
+
+static ErlDrvPort this_port;
+
+static int sig_init(void)
+{
+    this_port = (ErlDrvPort)-1;
+    return 0;
+}
+
+static sigc(int ino)
+{
+    driver_interrupt(this_port, ino);
+}
+
+static ErlDrvData sig_start(ErlDrvPort port, char* buf)
+{
+    if (this_port != (ErlDrvPort)-1)
+	return ERL_DRV_ERROR_GENERAL;
+    this_port = port;
+    signal(SIGUSR1, sigc);
+    return (ErlDrvData)port;
+}
+
+static void sig_stop(ErlDrvData port)
+{
+    this_port = (ErlDrvPort)-1;
+    signal(SIGUSR1, SIG_DFL);
+}
+
+doio(ErlDrvData port, ErlDrvEvent ino)
+{
+    /* First go get the io, unless we already did that */
+    /* In the sighandler */
+
+    /* Then send it to erlang */
+
+    driver_output(this_port, "y", 1);
+}