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- /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
- * |_o_o|\\ Copyright (c) 1989 The Software Distillery. *
- * |. o.| || All Rights Reserved *
- * | . | || Written by Doug Walker *
- * | o | || The Software Distillery *
- * | . |// 235 Trillingham Lane *
- * ====== Cary, NC 27513 *
- * BBS:(919)-471-6436 *
- \* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
- #include "mempriv.h"
-
- extern struct MWGlobal mwg;
-
- void *MWAllocMem(long size, long flags, long ismalloc, char *file, long line)
- {
- struct MWAlc *hd;
- char *tmpchar;
- int memtype;
-
- /* Force warning for malloc'd memory not freed if requested */
- if(mwg.flags & MWF_MALLOCWRN) ismalloc = 0;
-
- if(!(mwg.flags & MWF_ACTIVE)) return(NULL);
- if(mwg.flags & MWF_CHECK) MWCheck();
-
- if(size <= 0)
- {
- MWPrintf("\7Bad AllocMem length %ld from line %ld file \"%s\"\n",
- size, line, file);
- return(NULL);
- }
-
- memtype = (flags & MEMF_CHIP ? MWT_CHIP : MWT_FAST);
- if(mwg.sum[memtype] + size > mwg.lim[memtype])
- {
- /* Over the limit, fail it */
- MWPrintf("MemWatch: ");
- if(memtype == MWT_CHIP)
- MWPrintf("CHIP ");
- else
- MWPrintf("FAST ");
- MWPrintf("memory allocation exceeds MWLimit amount\n");
- return(NULL);
- }
-
- while(!(tmpchar = (char *)AllocMem(sizeof(struct MWAlc)+size, flags)))
- {
- if(mwg.freed) MWPurge();
- else return(NULL);
- }
-
- hd = (struct MWAlc *)tmpchar;
- hd->size = size;
- hd->flags = flags;
- hd->myflags = (ismalloc ? MWF_ISMALLOC : 0L);
- hd->file = file;
- hd->line = line;
- memcpy(hd->header, MWHEADSTR, MW_HEADLEN);
- memcpy(hd->memory+size, MWTRAILSTR, MW_TRAILLEN);
-
- if(!(flags & MEMF_CLEAR) && !(mwg.flags & MWF_NOATRASH))
- memset(hd->memory, MWATRASH, size); /* Trash the memory */
-
- hd->next = mwg.first;
- mwg.first = hd;
-
- if((mwg.sum[memtype] += size) > mwg.max[memtype])
- mwg.max[memtype] = mwg.sum[memtype];
- ++(mwg.num[memtype]);
-
- return((char *)hd->memory);
- }
-
- void MWFreeMem(void *mem, long size, long internal,
- char *file, long line)
- {
- struct MWAlc *mwa, *prev;
- int memtype;
- int error = 0;
-
- if(!(mwg.flags & MWF_ACTIVE)) return;
- if(mwg.flags & MWF_CHECK) MWCheck();
-
- for(prev = NULL, mwa = mwg.first;
- mwa && mwa->memory != mem;
- prev = mwa, mwa = mwa->next);
-
- if(!mwa)
- {
- for(mwa=mwg.freed; mwa && mwa->memory != mem; mwa=mwa->next);
- if(mwa)
- {
- MWPrintf("\7Memory freed twice\n");
- MWPrintAlc(mwa);
- }
- MWPrintf("\7Invalid FreeMem call, addr 0x%08lx length %ld\n"\
- " line %ld file \"%s\"\n",
- mem, size, line, file);
- error = 1;
- }
- else if(!internal && mwa->size != size)
- {
- MWPrintf("\7Incorrect FreeMem length %ld line %ld file \"%s\"\n",
- size, line, file);
- MWPrintAlc(mwa);
- error = 2;
- }
- else if(MWCheckA(mwa))
- error = 2;
-
- if(error)
- {
- MWHold();
- if(error == 1) return;
- }
-
- memtype = (mwa->flags & MEMF_CHIP ? MWT_CHIP : MWT_FAST);
- mwg.sum[memtype] -= mwa->size;
- --mwg.num[memtype];
-
- if(prev) prev->next = mwa->next;
- else mwg.first = mwa->next;
-
- if(!(mwg.flags & MWF_NOFTRASH))
- memset(mwa->memory, MWFTRASH, mwa->size); /* Trash it */
-
- if(mwg.flags & MWF_NOFKEEP)
- FreeMem((char *)mwa, mwa->size + sizeof(struct MWAlc));
- else
- {
- mwa->next = mwg.freed;
- mwg.freed = mwa;
- }
- }
-
- void *MWrealloc(void *mem, long size, char *file, long line)
- {
- void *new;
- struct MWAlc *mwa;
-
- if(!(new = MWAllocMem(size, 0, 1, file, line)))
- return(NULL);
-
- for(mwa = mwg.first;
- mwa && mwa->memory != mem;
- mwa = mwa->next);
-
- if(mwa && mwa->size < size) size = mwa->size;
-
- memcpy(new, mem, size);
-
- MWFreeMem(mem, 0, 1, file, line);
-
- return(new);
- }
-