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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 1997-2011. 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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "sys.h"
#include "erl_alloc.h"
#include "erl_thr_progress.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_atomic32_t erts_break_requested;
#define ERTS_SET_BREAK_REQUESTED \
erts_smp_atomic32_set_nob(&erts_break_requested, (erts_aint32_t) 1)
#define ERTS_UNSET_BREAK_REQUESTED \
erts_smp_atomic32_set_nob(&erts_break_requested, (erts_aint32_t) 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_thr_progress_block();
/* call the break handling function, reset the flag */
do_break();
ResetEvent(erts_sys_break_event);
ERTS_UNSET_BREAK_REQUESTED;
erts_smp_thr_progress_unblock();
}
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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