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unwind-prot.h
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1996-03-03
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/*
Copyright (C) 1996 John W. Eaton
This file is part of Octave.
Octave is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 2, or (at your option) any
later version.
Octave is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#if !defined (octave_unwind_prot_h)
#define octave_unwind_prot_h 1
#if defined (__GNUG__)
#pragma interface
#endif
#include <cstddef>
#include <string>
typedef void (*cleanup_func)(void *ptr);
void add_unwind_protect (cleanup_func fptr, void *ptr);
void run_unwind_protect (void);
void discard_unwind_protect (void);
void begin_unwind_frame (const string& tag);
void run_unwind_frame (const string& tag);
void discard_unwind_frame (const string& tag);
void run_all_unwind_protects (void);
void discard_all_unwind_protects (void);
void unwind_protect_int_internal (int *ptr, int value);
void unwind_protect_str_internal (string *ptr, const string& value);
void unwind_protect_ptr_internal (void **ptr, void *value);
void unwind_protect_var_internal (void *ptr, void *value, size_t size);
#define unwind_protect_int(i) \
unwind_protect_int_internal (&(i), (i))
#define unwind_protect_str(s) \
unwind_protect_str_internal (&(s), (s))
#define unwind_protect_ptr(p) \
unwind_protect_ptr_internal ((void **) &(p), (void *) (p))
class
unwind_elem
{
public:
unwind_elem (void)
: ue_tag (), ue_fptr (0), ue_ptr (0) { }
unwind_elem (const string &t)
: ue_tag (t), ue_fptr (0), ue_ptr (0) { }
unwind_elem (cleanup_func f, void *p)
: ue_tag (), ue_fptr (f), ue_ptr (p) { }
unwind_elem (const unwind_elem& el)
: ue_tag (el.ue_tag), ue_fptr (el.ue_fptr), ue_ptr (el.ue_ptr) { }
~unwind_elem (void) { }
unwind_elem& operator = (const unwind_elem& el)
{
ue_tag = el.ue_tag;
ue_fptr = el.ue_fptr;
ue_ptr = el.ue_ptr;
return *this;
}
string tag (void) { return ue_tag; }
cleanup_func fptr (void) { return ue_fptr; }
void *ptr (void) { return ue_ptr; }
private:
string ue_tag;
cleanup_func ue_fptr;
void *ue_ptr;
};
#endif
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/