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author | cvs2svn <> | 2002-09-25 03:01:31 +0400 |
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committer | cvs2svn <> | 2002-09-25 03:01:31 +0400 |
commit | 80502cc9c875e9ec0c4b370b8f0de11a2579d3c7 (patch) | |
tree | 3117b58c277584b607c2529afe33caaf03c2f0b1 /include/objalloc.h | |
parent | 481f35c8b3d9136e2430845fad71fb21fa3bc1d4 (diff) |
This commit was manufactured by cvs2svn to create branchtcltk840-20020924-branchpointtcltk840-20020924-branch
'tcltk840-20020924-branch'.
Sprout from carlton_dictionary-branch 2002-09-20 00:21:59 UTC cvs2svn 'This commit was manufactured by cvs2svn to create branch'
Cherrypick from master 2002-09-24 23:01:30 UTC Nathanael Nerode <neroden@gcc.gnu.org> '2002-09-22 Nathanael Nerode <neroden@gcc.gnu.org>':
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Diffstat (limited to 'include/objalloc.h')
-rw-r--r-- | include/objalloc.h | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/include/objalloc.h b/include/objalloc.h deleted file mode 100644 index c7106478d..000000000 --- a/include/objalloc.h +++ /dev/null @@ -1,115 +0,0 @@ -/* objalloc.h -- routines to allocate memory for objects - Copyright 1997, 2001 Free Software Foundation, Inc. - Written by Ian Lance Taylor, Cygnus Solutions. - -This program 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. - -This program 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 this program; if not, write to the Free Software -Foundation, 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ - -#ifndef OBJALLOC_H -#define OBJALLOC_H - -#include "ansidecl.h" - -/* These routines allocate space for an object. The assumption is - that the object will want to allocate space as it goes along, but - will never want to free any particular block. There is a function - to free a block, which also frees all more recently allocated - blocks. There is also a function to free all the allocated space. - - This is essentially a specialization of obstacks. The main - difference is that a block may not be allocated a bit at a time. - Another difference is that these routines are always built on top - of malloc, and always pass an malloc failure back to the caller, - unlike more recent versions of obstacks. */ - -/* This is what an objalloc structure looks like. Callers should not - refer to these fields, nor should they allocate these structure - themselves. Instead, they should only create them via - objalloc_init, and only access them via the functions and macros - listed below. The structure is only defined here so that we can - access it via macros. */ - -struct objalloc -{ - char *current_ptr; - unsigned int current_space; - PTR chunks; -}; - -/* Work out the required alignment. */ - -struct objalloc_align { char x; double d; }; - -#if defined (__STDC__) && __STDC__ -#ifndef offsetof -#include <stddef.h> -#endif -#endif -#ifndef offsetof -#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER) -#endif -#define OBJALLOC_ALIGN offsetof (struct objalloc_align, d) - -/* Create an objalloc structure. Returns NULL if malloc fails. */ - -extern struct objalloc *objalloc_create PARAMS ((void)); - -/* Allocate space from an objalloc structure. Returns NULL if malloc - fails. */ - -extern PTR _objalloc_alloc PARAMS ((struct objalloc *, unsigned long)); - -/* The macro version of objalloc_alloc. We only define this if using - gcc, because otherwise we would have to evaluate the arguments - multiple times, or use a temporary field as obstack.h does. */ - -#if defined (__GNUC__) && defined (__STDC__) && __STDC__ - -/* NextStep 2.0 cc is really gcc 1.93 but it defines __GNUC__ = 2 and - does not implement __extension__. But that compiler doesn't define - __GNUC_MINOR__. */ -#if __GNUC__ < 2 || (__NeXT__ && !__GNUC_MINOR__) -#define __extension__ -#endif - -#define objalloc_alloc(o, l) \ - __extension__ \ - ({ struct objalloc *__o = (o); \ - unsigned long __len = (l); \ - if (__len == 0) \ - __len = 1; \ - __len = (__len + OBJALLOC_ALIGN - 1) &~ (OBJALLOC_ALIGN - 1); \ - (__len <= __o->current_space \ - ? (__o->current_ptr += __len, \ - __o->current_space -= __len, \ - (PTR) (__o->current_ptr - __len)) \ - : _objalloc_alloc (__o, __len)); }) - -#else /* ! __GNUC__ */ - -#define objalloc_alloc(o, l) _objalloc_alloc ((o), (l)) - -#endif /* ! __GNUC__ */ - -/* Free an entire objalloc structure. */ - -extern void objalloc_free PARAMS ((struct objalloc *)); - -/* Free a block allocated by objalloc_alloc. This also frees all more - recently allocated blocks. */ - -extern void objalloc_free_block PARAMS ((struct objalloc *, PTR)); - -#endif /* OBJALLOC_H */ |