/**
 ** allocate.h ---- common ground for malloc & friends in 16 & 32 bit envs
 **                 stack based temporary memory allocation
 **
 ** Copyright (c) 1995 Csaba Biegl, 820 Stirrup Dr, Nashville, TN 37221
 ** [e-mail: csaba@vuse.vanderbilt.edu]
 **
 ** This file is part of the GRX graphics library.
 **
 ** The GRX graphics library is free software; you can redistribute it
 ** and/or modify it under some conditions; see the "copying.grx" file
 ** for details.
 **
 ** 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.
 **
 **/

#if defined(__alpha__) || (GRX_VERSION==GRX_VERSION_GENERIC_X11) && !defined(_AIX)
#  include <alloca.h>
#elif defined(__TURBOC__)
#  include <alloc.h>
#  include "bcc/allocate.h"
#elif defined(__WATCOMC__)
#  include <malloc.h>
#elif defined(_MSC_VER) && defined(_WIN32)
#  include <malloc.h>
#else
#  include <stdlib.h>
#endif

#if defined(_MSC_VER) && !defined(_WIN32)
#define farmalloc  _fmalloc
#define farrealloc _frealloc
#define farcalloc  _fcalloc
#define farfree    _ffree
#elif !defined(__TURBOC__)
#define farmalloc  malloc
#define farrealloc realloc
#define farcalloc  calloc
#define farfree    free
#endif

#if 0 && defined(_MSC_VER)
#define setup_alloca() do { unsigned char _stack_dummy_var_ = '\001'
#define reset_alloca() } while (0)
#endif


#ifndef setup_alloca
#define setup_alloca()
#define reset_alloca()
#endif

/* ALLOC / FREE : use alloca if possible */
#ifdef SMALL_STACK
#define ALLOC(sze) malloc(sze)
#define FREE(p)    free(p)
#define setup_ALLOC()
#define reset_ALLOC()
#elif defined(_MSC_VER) && !defined(_WIN32)
#define ALLOC(sze) _alloca(sze)
#define FREE(p)
#define setup_ALLOC  setup_alloca
#define reset_ALLOC  reset_alloca
#else
#define ALLOC(sze) alloca(sze)
#define FREE(p)
#define setup_ALLOC  setup_alloca
#define reset_ALLOC  reset_alloca
#endif

/* temp buffer for blits etc. */
extern void far *_GrTempBuffer;
extern unsigned  _GrTempBufferBytes;
#define _GrTempBufferAlloc(b) (                                     \
    ((unsigned)(b) <= _GrTempBufferBytes) ? _GrTempBuffer           \
					  : _GrTempBufferAlloc_(b) )
extern void far *_GrTempBufferAlloc_(size_t bytes);
extern void _GrTempBufferFree(void);
