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/* sigproc.h
Copyright 1997, 1998, 2000, 2001, 2002 Red Hat, Inc.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#ifndef _SIGPROC_H
#define _SIGPROC_H
#include <signal.h>
#define EXIT_SIGNAL 0x010000
#define EXIT_REPARENTING 0x020000
#define EXIT_NOCLOSEALL 0x040000
enum procstuff
{
PROC_ADDCHILD = 1, // add a new subprocess to list
PROC_CHILDTERMINATED = 2, // a child died
PROC_CLEARWAIT = 3, // clear all waits - signal arrived
PROC_WAIT = 4, // setup for wait() for subproc
PROC_NOTHING = 5 // nothing, really
};
typedef struct struct_waitq
{
int pid;
int options;
int status;
HANDLE ev;
void *rusage; /* pointer to potential rusage */
struct struct_waitq *next;
HANDLE thread_ev;
} waitq;
struct sigthread
{
DWORD id;
DWORD frame;
CRITICAL_SECTION lock;
LONG winapi_lock;
BOOL exception;
bool get_winapi_lock (int test = 0);
void release_winapi_lock ();
void init (const char *s);
};
class sigframe
{
private:
sigthread *st;
inline bool unregister ()
{
if (!st)
return 0;
EnterCriticalSection (&st->lock);
st->frame = 0;
st->exception = 0;
st->release_winapi_lock ();
LeaveCriticalSection (&st->lock);
st = NULL;
return 1;
}
public:
inline void set (sigthread &t, DWORD ebp, bool is_exception = 0)
{
DWORD oframe = t.frame;
st = &t;
t.frame = ebp;
t.exception = is_exception;
if (!oframe)
t.get_winapi_lock ();
}
inline void init (sigthread &t, DWORD ebp = (DWORD) __builtin_frame_address (0))
{
if (!t.frame && t.id == GetCurrentThreadId ())
set (t, ebp);
else
st = NULL;
}
sigframe (): st (NULL) {}
sigframe (sigthread &t, DWORD ebp = (DWORD) __builtin_frame_address (0)) {init (t, ebp);}
~sigframe ()
{
unregister ();
}
int call_signal_handler ();
};
extern sigthread mainthread;
extern HANDLE signal_arrived;
extern HANDLE sigCONT;
BOOL __stdcall my_parent_is_alive ();
extern "C" int __stdcall sig_dispatch_pending (int force = FALSE);
extern "C" void __stdcall set_process_mask (sigset_t newmask);
extern "C" void __stdcall reset_signal_arrived ();
int __stdcall sig_handle (int, bool);
void __stdcall sig_clear (int);
void __stdcall sig_set_pending (int);
int __stdcall handle_sigsuspend (sigset_t);
int __stdcall proc_subproc (DWORD, DWORD);
class _pinfo;
void __stdcall proc_terminate ();
void __stdcall sigproc_init ();
void __stdcall subproc_init ();
void __stdcall sigproc_terminate ();
BOOL __stdcall proc_exists (_pinfo *) __attribute__ ((regparm(1)));
BOOL __stdcall pid_exists (pid_t) __attribute__ ((regparm(1)));
int __stdcall sig_send (_pinfo *, int, DWORD ebp = (DWORD) __builtin_frame_address (0),
bool exception = 0) __attribute__ ((regparm(3)));
void __stdcall signal_fixup_after_fork ();
void __stdcall signal_fixup_after_exec (bool);
void __stdcall wait_for_sigthread ();
extern char myself_nowait_dummy[];
extern char myself_nowait_nonmain_dummy[];
#define WAIT_SIG_EXITING (WAIT_OBJECT_0 + 1)
#define myself_nowait ((_pinfo *)myself_nowait_dummy)
#define myself_nowait_nonmain ((_pinfo *)myself_nowait_nonmain_dummy)
#endif /*_SIGPROC_H*/
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