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- // This may look like C code, but it is really -*- C++ -*-
- /*
- Copyright (C) 1989 Free Software Foundation
- written by Doug Lea (dl@rocky.oswego.edu)
-
- This file is part of the GNU C++ Library. This library is free
- software; you can redistribute it and/or modify it under the terms of
- the GNU Library General Public License as published by the Free
- Software Foundation; either version 2 of the License, or (at your
- option) any later version. This library 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 Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free Software
- Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
- #ifdef __GNUG__
- #pragma implementation
- #endif
- #include <std.h>
- #include <xallocri.h>
- #include <new.h>
-
- #ifdef atarist
- static inline size_t good_size(size_t s)
- {
- size_t req = s + 4;
- size_t good = 8;
- while (good < req) good <<= 1;
- return good - 4;
- }
-
- void* AllocRing::alloc(size_t s)
- {
- size_t size = good_size(s);
-
- void* p;
- if (nodes[current].ptr != 0 &&
- nodes[current].sz >= int(size) &&
- nodes[current].sz < int(4 * size))
- p = nodes[current].ptr;
- else
- {
- if (nodes[current].ptr != 0) delete nodes[current].ptr;
- p = new char[size];
- nodes[current].ptr = p;
- nodes[current].sz = size;
- }
- ++current;
- if (current >= n) current = 0;
- return p;
- }
-
- AllocRing::AllocRing(size_t max)
- :n(max), current(0), nodes(new AllocQNode[max])
- {
- for (size_t i = 0; i < n; ++i)
- {
- nodes[i].ptr = 0;
- nodes[i].sz = 0;
- }
- }
-
-
- long AllocRing::find(void* p)
- {
- if (p == 0) return -1;
-
- for (size_t i = 0; i < n; ++i)
- if (nodes[i].ptr == p)
- return (long)i;
-
- return -1;
- }
-
-
- void AllocRing::clear()
- {
- for (size_t i = 0; i < n; ++i)
- {
- if (nodes[i].ptr != 0)
- {
- delete(nodes[i].ptr);
- nodes[i].ptr = 0;
- }
- nodes[i].sz = 0;
- }
- current = 0;
- }
-
-
- void AllocRing::free(void* p)
- {
- long idx = find(p);
- if (idx >= 0)
- {
- delete nodes[idx].ptr;
- nodes[idx].ptr = 0;
- }
- }
-
- AllocRing::~AllocRing()
- {
- clear();
- }
-
- int AllocRing::contains(void* p)
- {
- return find(p) >= 0;
- }
-
- #else
-
- void* AllocRing::alloc(int s)
- {
- unsigned int size = good_size(s);
-
- void* p;
- if (nodes[current].ptr != 0 &&
- nodes[current].sz >= int(size) &&
- nodes[current].sz < int(4 * size))
- p = nodes[current].ptr;
- else
- {
- if (nodes[current].ptr != 0) delete nodes[current].ptr;
- p = new char[size];
- nodes[current].ptr = p;
- nodes[current].sz = size;
- }
- ++current;
- if (current >= n) current = 0;
- return p;
- }
-
- AllocRing::AllocRing(int max)
- :n(max), current(0), nodes(new AllocQNode[max])
- {
- for (int i = 0; i < n; ++i)
- {
- nodes[i].ptr = 0;
- nodes[i].sz = 0;
- }
- }
-
- int AllocRing::find(void* p)
- {
- if (p == 0) return -1;
-
- for (int i = 0; i < n; ++i)
- if (nodes[i].ptr == p)
- return i;
-
- return -1;
- }
-
-
- void AllocRing::clear()
- {
- for (int i = 0; i < n; ++i)
- {
- if (nodes[i].ptr != 0)
- {
- delete(nodes[i].ptr);
- nodes[i].ptr = 0;
- }
- nodes[i].sz = 0;
- }
- current = 0;
- }
-
-
- void AllocRing::free(void* p)
- {
- int idx = find(p);
- if (idx >= 0)
- {
- delete nodes[idx].ptr;
- nodes[idx].ptr = 0;
- }
- }
-
- AllocRing::~AllocRing()
- {
- clear();
- }
-
- int AllocRing::contains(void* p)
- {
- return find(p) >= 0;
- }
-
- static inline unsigned int good_size(unsigned int s)
- {
- unsigned int req = s + 4;
- unsigned int good = 8;
- while (good < req) good <<= 1;
- return good - 4;
- }
- #endif
-
-
- #ifdef VMS
- #include "libgxx-fmtq.cc" // see Obstack.cc for reason for this
- #endif
-