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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 *
- \* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-
- /* This file contains the routines that must be linked in to every pgm */
- /* that wants to use MemLib - MWInit, MWTerm, MWCheck, MWHold, MWPurge */
-
- #include "mempriv.h"
-
- struct MWGlobal mwg;
-
- void _STIMWInit(void)
- {
- MWInit(NULL, __MWFlags, __MWLogName);
- }
-
- static void MWClose(void);
-
- /* Initialization routine - should be called once before any memory */
- /* is allocated */
-
- void MWInit(BPTR dbfh, LONG flags, char *dbnm)
- {
-
- /* Close any existing log that we opened */
- if(mwg.flags & MWF_ACTIVE) MWClose();
-
- if(dbfh) mwg.dbfh = dbfh;
- else if(dbnm) mwg.dbnm = dbnm; /* Deferred logname */
- else if(!(flags & MWF_NOLOG)) mwg.dbfh = Output();
-
- if(!(mwg.flags & MWF_ACTIVE))
- {
- mwg.lim[MWT_CHIP] = mwg.lim[MWT_FAST] = 0x7fffffff;
-
- mwg.task = FindTask(0L);
- }
-
- mwg.flags = flags|MWF_ACTIVE;
- }
-
- /* Termination routine */
-
- void _STDMWTerm(void)
- {
- int msgdone = 0;
-
- MWCheck();
-
- /* no need to trash the mem we may be about to free for good */
- mwg.flags |= MWF_NOFTRASH;
- mwg.flags &= ~MWF_CHECK;
-
- if(!(mwg.flags & MWF_NOFREE))
- {
- while(mwg.first)
- {
- if(!(mwg.first->myflags & MWF_ISMALLOC))
- {
- if(!msgdone)
- {
- MWPrintf("\7MemWatch ERROR: The following "
- "allocations were not freed:\n");
- msgdone = 1;
- }
- MWPrintAlc(mwg.first);
- }
- MWFreeMem(mwg.first->memory, mwg.first->size, 0, "MWTERM", 0);
- }
- }
-
- MWPurge(); /* Really free all mem on the 'free' chain */
-
- MWClose();
-
- memset((char *)&mwg, 0, sizeof(struct MWGlobal));
-
- }
-
- /* For compatibility with previous versions */
- void MWTerm(void)
- {
- _STDMWTerm();
- }
-
- static void MWClose(void)
- {
- char tmp[2];
-
- if(mwg.dbnm && mwg.dbfh)
- {
- MWPrintf("Hit RETURN to continue: ");
- Read(mwg.dbfh, tmp, 1);
- Close(mwg.dbfh);
- }
- mwg.dbfh = NULL;
- }
-
- void MWLimit(LONG chiplim, LONG fastlim)
- {
- mwg.lim[MWT_CHIP] = chiplim;
- mwg.lim[MWT_FAST] = fastlim;
- }
-
- int MWCheckA(struct MWAlc *mwa)
- {
- int header, trailer;
-
- if(header=memcmp((char *)&mwa->header, MWHEADSTR, MW_HEADLEN))
- MWPrintf("\7MemWatch ERROR: Header trashed\n");
-
- if(trailer=memcmp(mwa->memory+mwa->size, MWTRAILSTR, MW_TRAILLEN))
- MWPrintf("\7MemWatch ERROR: Trailer trashed\n");
-
- if(header || trailer)
- {
- mwa->myflags |= MWF_REPORTED;
- MWPrintAlc(mwa);
- return(1);
- }
-
- return(0);
- }
-
- /* Validity check routine - checks all known allocations for overwrites */
- /* Called from every alloc and free routine, plus when specifically */
- /* invoked */
-
- void MWCheck(void)
- {
- struct MWAlc *mwa;
- char *tmpchar;
- int error, tmpint;
-
- error = 0;
- for(mwa=mwg.first; mwa; mwa=mwa->next)
- {
- if( (mwa->myflags & MWF_REPMASK) == MWF_REPORTED) continue;
-
- error = MWCheckA(mwa);
- }
-
- for(mwa=mwg.freed; mwa; mwa=mwa->next)
- {
- if( (mwa->myflags & MWF_REPMASK) == MWF_REPORTED) continue;
-
- for(tmpint=0, tmpchar=mwa->memory;
- tmpint<mwa->size;
- tmpint++, tmpchar++)
- {
- if(*tmpchar != MWFTRASH)
- {
- mwa->myflags |= MWF_REPORTED;
- error = 1;
- MWPrintf("\7MemWatch ERROR: Freed memory modified\n");
- MWPrintAlc(mwa);
- break;
- }
- }
- }
-
- if(error) MWHold();
- }
-
- void MWHold(void)
- {
- struct MWAlc *mwa;
-
- mwg.flags &= ~MWF_ERROR;
-
- /* We're attempting to go on, make all the sentinels correct */
- for(mwa=mwg.first; mwa; mwa=mwa->next)
- {
- mwa->myflags &= ~MWF_REPMASK;
- memcpy(mwa->header, MWHEADSTR, MW_HEADLEN);
- memcpy((mwa->memory + mwa->size), MWTRAILSTR, MW_TRAILLEN);
- }
-
- for(mwa=mwg.freed; mwa; mwa=mwa->next)
- {
- mwa->myflags &= ~MWF_REPMASK;
- memset(mwa->memory, MWFTRASH, mwa->size);
- }
- }
-
- /* MWPurge really frees all memory placed on the 'freed' chain by */
- /* FreeMem() or free() */
-
- void MWPurge(void)
- {
- struct MWAlc *cur, *next;
-
- for(cur=mwg.freed; cur; cur=next)
- {
- next = cur->next;
- FreeMem(cur, cur->size + sizeof(struct MWAlc));
- }
- mwg.freed = NULL;
- }
-
- void MWPrintf(char *ctl, ...)
- {
- static char buffer[256];
- va_list args;
-
- va_start(args, ctl);
-
- /* Note: The weird string constant is actually CODE that will */
- /* be called by RawDoFmt. */
- RawDoFmt(ctl, args, (void (*))"\x16\xc0\x4e\x75", buffer);
-
- va_end(args);
-
- /* If you don't have Commodore's debug.lib, KPutStr will come up undefined. */
- /* Edit mempriv.h and change the #define for USEDEBUGLIB to 0 in this case. */
- #if USEDEBUGLIB
- if(mwg.flags & MWF_SERIAL) KPutStr(buffer);
- else
- #endif
- {
- if(!mwg.dbfh && mwg.dbnm) mwg.dbfh = Open(mwg.dbnm, MODE_NEWFILE);
- if(mwg.dbfh) Write(mwg.dbfh, buffer, strlen(buffer));
- }
- }
-
- 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);
- }
-