From 84adefa331c4159d432d22840663c38f155cd4c1 Mon Sep 17 00:00:00 2001
From: Erlang/OTP <otp@erlang.org>
Date: Fri, 20 Nov 2009 14:54:40 +0000
Subject: The R13B03 release.

---
 erts/emulator/sys/win32/sys_interrupt.c | 142 ++++++++++++++++++++++++++++++++
 1 file changed, 142 insertions(+)
 create mode 100644 erts/emulator/sys/win32/sys_interrupt.c

(limited to 'erts/emulator/sys/win32/sys_interrupt.c')

diff --git a/erts/emulator/sys/win32/sys_interrupt.c b/erts/emulator/sys/win32/sys_interrupt.c
new file mode 100644
index 0000000000..d2449a1bdb
--- /dev/null
+++ b/erts/emulator/sys/win32/sys_interrupt.c
@@ -0,0 +1,142 @@
+/*
+ * %CopyrightBegin%
+ * 
+ * Copyright Ericsson AB 1997-2009. 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: Interrupt handling in windows.
+ */
+#include "sys.h"
+#include "erl_alloc.h"
+#include "erl_driver.h"
+#include "../../drivers/win32/win_con.h"
+
+#if defined(__GNUC__)
+#  define WIN_SYS_INLINE __inline__
+#elif defined(__WIN32__)
+#  define WIN_SYS_INLINE __forceinline
+#endif
+
+#ifdef ERTS_SMP
+erts_smp_atomic_t erts_break_requested;
+#define ERTS_SET_BREAK_REQUESTED \
+  erts_smp_atomic_set(&erts_break_requested, (long) 1)
+#define ERTS_UNSET_BREAK_REQUESTED \
+  erts_smp_atomic_set(&erts_break_requested, (long) 0)
+#else
+volatile int erts_break_requested = 0;
+#define ERTS_SET_BREAK_REQUESTED (erts_break_requested = 1)
+#define ERTS_UNSET_BREAK_REQUESTED (erts_break_requested = 0)
+#endif
+
+extern int nohup;
+HANDLE erts_sys_break_event = NULL;
+
+void erts_do_break_handling(void)
+{
+    /*
+     * Most functions that do_break() calls are intentionally not thread safe;
+     * therefore, make sure that all threads but this one are blocked before
+     * proceeding!
+     */
+    erts_smp_block_system(0);
+    /* call the break handling function, reset the flag */
+    do_break();
+
+    ResetEvent(erts_sys_break_event);
+    ERTS_UNSET_BREAK_REQUESTED;
+
+    erts_smp_release_system();
+}
+
+
+BOOL WINAPI ctrl_handler_ignore_break(DWORD dwCtrlType)
+{
+    switch (dwCtrlType) {
+    case CTRL_C_EVENT:
+    case CTRL_BREAK_EVENT:
+	return TRUE;
+	break;
+    case CTRL_LOGOFF_EVENT:
+	if (nohup)
+	    return TRUE;
+	/* else pour through... */
+    case CTRL_CLOSE_EVENT:
+    case CTRL_SHUTDOWN_EVENT:
+	erl_exit(0, "");
+	break;
+    }
+    return TRUE;
+}
+
+void erts_set_ignore_break(void) {
+    ConSetCtrlHandler(ctrl_handler_ignore_break);
+    SetConsoleCtrlHandler(ctrl_handler_ignore_break, TRUE);
+}
+
+BOOL WINAPI ctrl_handler_replace_intr(DWORD dwCtrlType)
+{
+    switch (dwCtrlType) {
+    case CTRL_C_EVENT:
+	return FALSE;
+    case CTRL_BREAK_EVENT:
+	SetEvent(erts_sys_break_event);
+	break;
+    case CTRL_LOGOFF_EVENT:
+	if (nohup)
+	    return TRUE;
+	/* else pour through... */
+    case CTRL_CLOSE_EVENT:
+    case CTRL_SHUTDOWN_EVENT:
+	erl_exit(0, "");
+	break;
+    }
+    return TRUE;
+}
+
+
+/* Don't use ctrl-c for break handler but let it be 
+   used by the shell instead (see user_drv.erl) */
+void erts_replace_intr(void) {
+    ConSetCtrlHandler(ctrl_handler_replace_intr);
+    SetConsoleCtrlHandler(ctrl_handler_replace_intr, TRUE);
+}
+
+BOOL WINAPI ctrl_handler(DWORD dwCtrlType)
+{
+    switch (dwCtrlType) {
+    case CTRL_C_EVENT:
+    case CTRL_BREAK_EVENT:
+	SetEvent(erts_sys_break_event);
+	break;
+    case CTRL_LOGOFF_EVENT:
+	if (nohup)
+	    return TRUE;
+	/* else pour through... */
+    case CTRL_CLOSE_EVENT:
+    case CTRL_SHUTDOWN_EVENT:
+	erl_exit(0, "");
+	break;
+    }
+    return TRUE;
+}
+
+void init_break_handler()
+{
+    ConSetCtrlHandler(ctrl_handler);
+    SetConsoleCtrlHandler(ctrl_handler, TRUE);
+}
+
-- 
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