gecko-dev/modules/coreincl/coremem.h

/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1998 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s): 
 */

/*-----------------------------------------------------------------------------
    coremem.h - used to be xp_mem.h
    
    Cross-Platform Memory API
-----------------------------------------------------------------------------*/


#ifndef _coremem_h_
#define _coremem_h_

#include "platform.h"

#ifdef XP_WIN16
#include <malloc.h>
#endif

/* global free routine */
#define XP_FREEIF(obj) do { if(obj) XP_FREE(obj); } while(0)

/*-----------------------------------------------------------------------------
Allocating Structures
-----------------------------------------------------------------------------*/

#define XP_NEW( x )       	(x*)malloc( sizeof( x ) )
#define XP_DELETE( p )  	free( p )



#ifdef XP_WIN16

XP_BEGIN_PROTOS
extern void * WIN16_realloc(void * ptr, unsigned long size);
extern void * WIN16_malloc(unsigned long size);
XP_END_PROTOS

#define XP_REALLOC(ptr, size)   WIN16_realloc(ptr, size)
#define XP_ALLOC(size)          WIN16_malloc(size)
#else

#if defined(DEBUG) && defined(MOZILLA_CLIENT)
/* Check that we never allocate anything greater than 64K.  If we ever tried,
   Win16 would choke, and we'd like to find out about it on some other platform
   (like, one where we have a working debugger). */
/* This code used to call abort. Unfortunately, on Windows, abort() doesn't
 * go to the debugger. Instead, it silently quits the program.
 * So use XP_ASSERT(FALSE) instead.
 */

#define XP_CHECK_ALLOC_SIZE(size)	((size) <= 0xFFFF ? size : (XP_ASSERT(FALSE), (size)))
#else
#define XP_CHECK_ALLOC_SIZE(size)	size
#endif

#define XP_REALLOC(ptr, size)   	realloc(ptr, XP_CHECK_ALLOC_SIZE(size))
#define XP_ALLOC(size)          	malloc(XP_CHECK_ALLOC_SIZE(size))
#endif


#ifdef DEBUG
#define XP_CALLOC(num, sz)	(((num)*(sz))<64000 ? calloc((num),(sz)) : (XP_ASSERT(FALSE), calloc((num),(sz))))
#else
#define XP_CALLOC(num, sz)      calloc((num), (sz))
#endif

#define XP_FREE(ptr)            free(ptr)
#define XP_NEW_ZAP(TYPE)        ( (TYPE*) calloc (1, sizeof (TYPE) ) )


/* --------------------------------------------------------------------------
  16-bit windows requires space allocated bigger than 32K to be of
  type huge.  For example:

  int HUGE * foo = halloc(100000);
-----------------------------------------------------------------------------*/

/* There's no huge realloc because win16 doesn't have a hrealloc,
 * and there's no API to discover the original buffer's size.
 */
#ifdef XP_WIN16
#define XP_HUGE __huge
#define XP_HUGE_ALLOC(SIZE) halloc(SIZE,1)
#define XP_HUGE_FREE(SIZE) hfree(SIZE)
#define XP_HUGE_MEMCPY(DEST, SOURCE, LEN) hmemcpy(DEST, SOURCE, LEN)
#else
#define XP_HUGE
#define XP_HUGE_ALLOC(SIZE) malloc(SIZE)
#define XP_HUGE_FREE(SIZE) free(SIZE)
#define XP_HUGE_MEMCPY(DEST, SOURCE, LEN) memcpy(DEST, SOURCE, LEN)
#endif

#define XP_HUGE_CHAR_PTR char XP_HUGE *

/*-----------------------------------------------------------------------------
Allocating Large Buffers
NOTE: this does not interchange with XP_ALLOC/XP_NEW/XP_FREE/XP_DELETE
-----------------------------------------------------------------------------*/

#if defined(XP_UNIX) || defined(XP_WIN32) || defined(XP_MAC)

/* don't typedef this to void* unless you want obscure bugs... */
typedef unsigned long *	XP_Block;

#define XP_ALLOC_BLOCK(SIZE)            malloc ((SIZE))
#define XP_FREE_BLOCK(BLOCK)            free ((BLOCK))
#ifdef XP_UNIXu
  /* On SunOS, realloc(0,n) ==> 0 */
# define XP_REALLOC_BLOCK(BLOCK,SIZE)    ((BLOCK) \
					  ? realloc ((BLOCK), (SIZE)) \
					  : malloc ((SIZE)))
#else /* !XP_UNIX */
# define XP_REALLOC_BLOCK(BLOCK,SIZE)    realloc ((BLOCK), (SIZE))
#endif /* !XP_UNIX */
#define XP_LOCK_BLOCK(PTR,TYPE,BLOCK)   PTR = ((TYPE) (BLOCK))
#ifdef DEBUG
#define XP_UNLOCK_BLOCK(BLOCK)          (void)BLOCK
#else
#define XP_UNLOCK_BLOCK(BLOCK)
#endif
#endif /* XP_UNIX || XP_WIN32 */

#ifdef XP_WIN16

typedef unsigned char * XP_Block;
#define XP_ALLOC_BLOCK(SIZE)            WIN16_malloc((SIZE))
#define XP_FREE_BLOCK(BLOCK)            free ((BLOCK))
#define XP_REALLOC_BLOCK(BLOCK,SIZE)    ((BLOCK) \
					  ? WIN16_realloc ((BLOCK), (SIZE)) \
					  : WIN16_malloc ((SIZE)))
#define XP_LOCK_BLOCK(PTR,TYPE,BLOCK)   PTR = ((TYPE) (BLOCK))
#ifdef DEBUG
#define XP_UNLOCK_BLOCK(BLOCK)          (void)BLOCK
#else
#define XP_UNLOCK_BLOCK(BLOCK)
#endif


#endif /* XP_WIN16 */



#define	PA_Block					XP_Block
#define	PA_ALLOC(S)				XP_ALLOC_BLOCK(S)
#define 	PA_FREE(B)				XP_FREE_BLOCK(B)
#define 	PA_REALLOC(B,S)			XP_REALLOC_BLOCK(B,S)
#define 	PA_LOCK(P,T,B)				XP_LOCK_BLOCK(P,T,B)
#define 	PA_UNLOCK(B)				XP_UNLOCK_BLOCK(B)

#endif /* _coremem_h_ */