зеркало из https://github.com/mozilla/gecko-dev.git
285 строки
8.6 KiB
C
285 строки
8.6 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/*-----------------------------------------------------------------------------
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XPMem.h
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Cross-Platform Memory API
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-----------------------------------------------------------------------------*/
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#ifndef _XP_MEM_
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#define _XP_MEM_
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#include "xp_core.h"
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#ifdef XP_MAC
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#include "FlushAllocator.h"
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#endif
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#ifdef XP_WIN16
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#include <malloc.h>
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#endif
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/* global free routine */
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#define XP_FREEIF(obj) do { if(obj) { XP_FREE(obj); obj = 0; }} while(0)
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/*-----------------------------------------------------------------------------
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Allocating Structures
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-----------------------------------------------------------------------------*/
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#define XP_NEW( x ) (x*)malloc( sizeof( x ) )
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#define XP_DELETE( p ) free( p )
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/*-----------------------------------------------------------------------------
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Mallocs
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NOTE: this uses the same malloc as the structure allocator so it is
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ok and safe to use XP_DELETE or XP_FREE interchangeably!
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-----------------------------------------------------------------------------*/
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#ifdef XP_MAC
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#define XP_ALLOC( s ) malloc( s )
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#define XP_FREE( p ) free( p )
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#define XP_REALLOC( p , s ) realloc( p, s )
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#define XP_CALLOC( n, s ) calloc( (n), (s) )
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#define XP_NEW_ZAP( t ) ((t*)calloc( 1, sizeof(t) ) )
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#else /* !XP_MAC */
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/* normal win and unix */
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#ifdef XP_WIN16
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XP_BEGIN_PROTOS
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extern void * WIN16_realloc(void * ptr, unsigned long size);
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extern void * WIN16_malloc(unsigned long size);
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XP_END_PROTOS
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#define XP_REALLOC(ptr, size) WIN16_realloc(ptr, size)
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#define XP_ALLOC(size) WIN16_malloc(size)
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#else
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#if defined(DEBUG) && defined(MOZILLA_CLIENT)
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/* Check that we never allocate anything greater than 64K. If we ever tried,
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Win16 would choke, and we'd like to find out about it on some other platform
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(like, one where we have a working debugger). */
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/* This code used to call abort. Unfortunately, on Windows, abort() doesn't
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* go to the debugger. Instead, it silently quits the program.
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* So use XP_ASSERT(FALSE) instead.
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*/
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#define XP_CHECK_ALLOC_SIZE(size) ((size) <= 0xFFFF ? size : (XP_ASSERT(FALSE), (size)))
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#else
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#define XP_CHECK_ALLOC_SIZE(size) size
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#endif
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#define XP_REALLOC(ptr, size) realloc(ptr, XP_CHECK_ALLOC_SIZE(size))
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#define XP_ALLOC(size) malloc(XP_CHECK_ALLOC_SIZE(size))
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#endif
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#ifdef DEBUG
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#define XP_CALLOC(num, sz) (((num)*(sz))<64000 ? calloc((num),(sz)) : (XP_ASSERT(FALSE), calloc((num),(sz))))
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#else
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#define XP_CALLOC(num, sz) calloc((num), (sz))
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#endif
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#define XP_FREE(ptr) free(ptr)
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#define XP_NEW_ZAP(TYPE) ( (TYPE*) calloc (1, sizeof (TYPE) ) )
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#endif /* !XP_MAC */
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/* --------------------------------------------------------------------------
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16-bit windows requires space allocated bigger than 32K to be of
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type huge. For example:
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int HUGE * foo = halloc(100000);
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-----------------------------------------------------------------------------*/
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/* There's no huge realloc because win16 doesn't have a hrealloc,
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* and there's no API to discover the original buffer's size.
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*/
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#ifdef XP_WIN16
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#define XP_HUGE __huge
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#define XP_HUGE_ALLOC(SIZE) halloc(SIZE,1)
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#define XP_HUGE_FREE(SIZE) hfree(SIZE)
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#define XP_HUGE_MEMCPY(DEST, SOURCE, LEN) hmemcpy(DEST, SOURCE, LEN)
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#else
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#define XP_HUGE
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#define XP_HUGE_ALLOC(SIZE) malloc(SIZE)
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#define XP_HUGE_FREE(SIZE) free(SIZE)
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#define XP_HUGE_MEMCPY(DEST, SOURCE, LEN) memcpy(DEST, SOURCE, LEN)
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#endif
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#define XP_HUGE_CHAR_PTR char XP_HUGE *
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/*-----------------------------------------------------------------------------
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Allocating Large Buffers
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NOTE: this does not interchange with XP_ALLOC/XP_NEW/XP_FREE/XP_DELETE
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-----------------------------------------------------------------------------*/
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#if defined(XP_UNIX) || defined(XP_WIN32)
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/* don't typedef this to void* unless you want obscure bugs... */
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typedef unsigned long * XP_Block;
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#define XP_ALLOC_BLOCK(SIZE) malloc ((SIZE))
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#define XP_FREE_BLOCK(BLOCK) free ((BLOCK))
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#ifdef XP_UNIXu
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/* On SunOS, realloc(0,n) ==> 0 */
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# define XP_REALLOC_BLOCK(BLOCK,SIZE) ((BLOCK) \
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? realloc ((BLOCK), (SIZE)) \
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: malloc ((SIZE)))
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#else /* !XP_UNIX */
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# define XP_REALLOC_BLOCK(BLOCK,SIZE) realloc ((BLOCK), (SIZE))
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#endif /* !XP_UNIX */
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#define XP_LOCK_BLOCK(PTR,TYPE,BLOCK) PTR = ((TYPE) (BLOCK))
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#ifdef DEBUG
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#define XP_UNLOCK_BLOCK(BLOCK) (void)BLOCK
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#else
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#define XP_UNLOCK_BLOCK(BLOCK)
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#endif
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#endif /* XP_UNIX || XP_WIN32 */
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#if defined(XP_OS2)
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/* don't typedef this to void* unless you want obscure bugs... */
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typedef unsigned long * XP_Block;
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#define XP_ALLOC_BLOCK(SIZE) malloc ((SIZE))
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#define XP_FREE_BLOCK(BLOCK) free ((BLOCK))
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# define XP_REALLOC_BLOCK(BLOCK,SIZE) realloc ((BLOCK), (SIZE))
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#define XP_LOCK_BLOCK(PTR,TYPE,BLOCK) PTR = ((TYPE) (BLOCK))
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#ifdef DEBUG
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#define XP_UNLOCK_BLOCK(BLOCK) (void)BLOCK
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#else
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#define XP_UNLOCK_BLOCK(BLOCK)
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#endif
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#ifdef MCW_DEBUG
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#include <stdlib.h>
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#include <shmalloc.h>
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#endif
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#endif /* XP_OS2 */
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#ifdef XP_WIN16
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typedef unsigned char * XP_Block;
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#define XP_ALLOC_BLOCK(SIZE) WIN16_malloc((SIZE))
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#define XP_FREE_BLOCK(BLOCK) free ((BLOCK))
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#define XP_REALLOC_BLOCK(BLOCK,SIZE) ((BLOCK) \
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? WIN16_realloc ((BLOCK), (SIZE)) \
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: WIN16_malloc ((SIZE)))
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#define XP_LOCK_BLOCK(PTR,TYPE,BLOCK) PTR = ((TYPE) (BLOCK))
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#ifdef DEBUG
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#define XP_UNLOCK_BLOCK(BLOCK) (void)BLOCK
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#else
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#define XP_UNLOCK_BLOCK(BLOCK)
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#endif
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#endif /* XP_WIN16 */
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#ifdef XP_MAC
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typedef float* XP_Block;
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#define XP_ALLOC_BLOCK( s ) ((XP_Block)malloc( s ) )
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#define XP_FREE_BLOCK( b ) free( b )
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#define XP_REALLOC_BLOCK( b, s ) ((XP_Block)realloc( b, s ) )
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#define XP_LOCK_BLOCK( p, t, b ) (p = ( t )( b ))
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#define XP_UNLOCK_BLOCK( b )
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#endif /* XP_MAC */
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#define PA_Block XP_Block
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#define PA_ALLOC(S) XP_ALLOC_BLOCK(S)
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#define PA_FREE(B) XP_FREE_BLOCK(B)
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#define PA_REALLOC(B,S) XP_REALLOC_BLOCK(B,S)
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#define PA_LOCK(P,T,B) XP_LOCK_BLOCK(P,T,B)
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#define PA_UNLOCK(B) XP_UNLOCK_BLOCK(B)
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/*-----------------------------------------------------------------------------
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Allocating many small structures.
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If allocating many small structures, it is often more efficient to allocate
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an array of a bunch of them, and maintain a free list of them. These
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utilities do that for you.
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You must provide a XP_AllocStructInfo structure which describes what
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it is you are trying to allocate it. If statically defined, use the
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XP_INITIALIZE_ALLOCSTRUCTINFO macro to initialize it; if you prefer to
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initialize it at runtime, use the XP_InitAllocStructInfo() routine.
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If you free everything you've ever allocated for a given
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XP_AllocStructInfo, all the memory used will be freed. Or, if you're
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*really sure* you're done with everything you've allocated for a given
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XP_AllocStructInfo, you can just call the scary XP_FreeAllStructs() routine.
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Don't mix calls to XP_AllocStruct/XP_FreeStruct and XP_ALLOC/XP_FREE !!!
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XP_AllocStructZero is the same as XP_AllocStruct, but it also zeros out
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the allocated memory.
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An example:
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struct foo {
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int a;
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int b;
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};
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static XP_AllocStructInfo FooAlloc =
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{ XP_INITIALIZE_ALLOCSTRUCTINFO(sizeof(struct foo)) };
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.
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.
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.
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struct foo* ptr = (struct foo*) XP_AllocStruct(&FooAlloc);
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.
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.
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.
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XP_FreeStruct(FooAlloc, ptr);
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-----------------------------------------------------------------------------*/
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typedef struct XP_AllocStructInfo {
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int size;
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void* curchunk;
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int leftinchunk;
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void* firstfree;
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void* firstchunk;
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int numalloced;
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} XP_AllocStructInfo;
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#define XP_INITIALIZE_ALLOCSTRUCTINFO(size) ((size + sizeof(void*) - 1) / sizeof(void*)) * sizeof(void*)
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XP_BEGIN_PROTOS
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void XP_InitAllocStructInfo(XP_AllocStructInfo* info, int size);
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void* XP_AllocStruct(XP_AllocStructInfo* info);
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void* XP_AllocStructZero(XP_AllocStructInfo* info);
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void XP_FreeStruct(XP_AllocStructInfo* info, void* ptr);
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void XP_FreeAllStructs(XP_AllocStructInfo* info); /* Danger! Use with care! */
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XP_END_PROTOS
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#endif /* _XP_MEM_ */
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