+++ /dev/null
-// NEWMM.C\r
-\r
-/*\r
-=============================================================================\r
-\r
- ID software memory manager\r
- --------------------------\r
-\r
-Primary coder: John Carmack\r
-\r
-RELIES ON\r
----------\r
-Quit (char *error) function\r
-\r
-\r
-WORK TO DO\r
-----------\r
-MM_SizePtr to change the size of a given pointer\r
-\r
-Multiple purge levels utilized\r
-\r
-EMS / XMS unmanaged routines\r
-\r
-=============================================================================\r
-*/\r
-\r
-#include "ID_HEADS.H"\r
-#pragma hdrstop\r
-\r
-#pragma warn -pro\r
-#pragma warn -use\r
-\r
-/*\r
-=============================================================================\r
-\r
- LOCAL INFO\r
-\r
-=============================================================================\r
-*/\r
-\r
-#define LOCKBIT 0x80 // if set in attributes, block cannot be moved\r
-#define PURGEBITS 3 // 0-3 level, 0= unpurgable, 3= purge first\r
-#define PURGEMASK 0xfffc\r
-#define BASEATTRIBUTES 0 // unlocked, non purgable\r
-\r
-#define MAXUMBS 10\r
-\r
-typedef struct mmblockstruct\r
-{\r
- unsigned start,length;\r
- unsigned attributes;\r
- memptr *useptr; // pointer to the segment start\r
- struct mmblockstruct far *next;\r
-} mmblocktype;\r
-\r
-\r
-//#define GETNEWBLOCK {if(!(mmnew=mmfree))Quit("MM_GETNEWBLOCK: No free blocks!")\\r
-// ;mmfree=mmfree->next;}\r
-\r
-#define GETNEWBLOCK {if(!mmfree)MML_ClearBlock();mmnew=mmfree;mmfree=mmfree->next;}\r
-\r
-#define FREEBLOCK(x) {*x->useptr=NULL;x->next=mmfree;mmfree=x;}\r
-\r
-/*\r
-=============================================================================\r
-\r
- GLOBAL VARIABLES\r
-\r
-=============================================================================\r
-*/\r
-\r
-mminfotype mminfo;\r
-memptr bufferseg;\r
-boolean mmerror;\r
-\r
-void (* beforesort) (void);\r
-void (* aftersort) (void);\r
-\r
-/*\r
-=============================================================================\r
-\r
- LOCAL VARIABLES\r
-\r
-=============================================================================\r
-*/\r
-\r
-boolean mmstarted;\r
-\r
-void far *farheap;\r
-void *nearheap;\r
-\r
-mmblocktype far mmblocks[MAXBLOCKS]\r
- ,far *mmhead,far *mmfree,far *mmrover,far *mmnew;\r
-\r
-boolean bombonerror;\r
-\r
-//unsigned totalEMSpages,freeEMSpages,EMSpageframe,EMSpagesmapped,EMShandle;\r
-\r
-void (* XMSaddr) (void); // far pointer to XMS driver\r
-\r
-unsigned numUMBs,UMBbase[MAXUMBS];\r
-\r
-//==========================================================================\r
-\r
-//\r
-// local prototypes\r
-//\r
-\r
-boolean MML_CheckForEMS (void);\r
-void MML_ShutdownEMS (void);\r
-void MM_MapEMS (void);\r
-boolean MML_CheckForXMS (void);\r
-void MML_ShutdownXMS (void);\r
-void MML_UseSpace (unsigned segstart, unsigned seglength);\r
-void MML_ClearBlock (void);\r
-\r
-//==========================================================================\r
-\r
-/*\r
-======================\r
-=\r
-= MML_CheckForXMS\r
-=\r
-= Check for XMM driver\r
-=\r
-=======================\r
-*/\r
-\r
-boolean MML_CheckForXMS (void)\r
-{\r
- numUMBs = 0;\r
-\r
-asm {\r
- mov ax,0x4300\r
- int 0x2f // query status of installed diver\r
- cmp al,0x80\r
- je good\r
- }\r
-\r
- return false;\r
-good:\r
- return true;\r
-}\r
-\r
-\r
-/*\r
-======================\r
-=\r
-= MML_SetupXMS\r
-=\r
-= Try to allocate all upper memory block\r
-=\r
-=======================\r
-*/\r
-\r
-void MML_SetupXMS (void)\r
-{\r
- unsigned base,size;\r
-\r
-asm {\r
- mov ax,0x4310\r
- int 0x2f\r
- mov [WORD PTR XMSaddr],bx\r
- mov [WORD PTR XMSaddr+2],es // function pointer to XMS driver\r
- }\r
-\r
-getmemory:\r
-asm {\r
- mov ah,XMS_ALLOCUMB\r
- mov dx,0xffff // try for largest block possible\r
- call [DWORD PTR XMSaddr]\r
- or ax,ax\r
- jnz gotone\r
-\r
- cmp bl,0xb0 // error: smaller UMB is available\r
- jne done;\r
-\r
- mov ah,XMS_ALLOCUMB\r
- call [DWORD PTR XMSaddr] // DX holds largest available UMB\r
- or ax,ax\r
- jz done // another error...\r
- }\r
-\r
-gotone:\r
-asm {\r
- mov [base],bx\r
- mov [size],dx\r
- }\r
- MML_UseSpace (base,size);\r
- mminfo.XMSmem += size*16;\r
- UMBbase[numUMBs] = base;\r
- numUMBs++;\r
- if (numUMBs < MAXUMBS)\r
- goto getmemory;\r
-\r
-done:;\r
-}\r
-\r
-\r
-/*\r
-======================\r
-=\r
-= MML_ShutdownXMS\r
-=\r
-======================\r
-*/\r
-\r
-void MML_ShutdownXMS (void)\r
-{\r
- int i;\r
- unsigned base;\r
-\r
- for (i=0;i<numUMBs;i++)\r
- {\r
- base = UMBbase[i];\r
-\r
-asm mov ah,XMS_FREEUMB\r
-asm mov dx,[base]\r
-asm call [DWORD PTR XMSaddr]\r
- }\r
-}\r
-\r
-//==========================================================================\r
-\r
-/*\r
-======================\r
-=\r
-= MML_UseSpace\r
-=\r
-= Marks a range of paragraphs as usable by the memory manager\r
-= This is used to mark space for the near heap, far heap, ems page frame,\r
-= and upper memory blocks\r
-=\r
-======================\r
-*/\r
-\r
-void MML_UseSpace (unsigned segstart, unsigned seglength)\r
-{\r
- mmblocktype far *scan,far *last;\r
- unsigned oldend;\r
- long extra;\r
-\r
- scan = last = mmhead;\r
- mmrover = mmhead; // reset rover to start of memory\r
-\r
-//\r
-// search for the block that contains the range of segments\r
-//\r
- while (scan->start+scan->length < segstart)\r
- {\r
- last = scan;\r
- scan = scan->next;\r
- }\r
-\r
-//\r
-// take the given range out of the block\r
-//\r
- oldend = scan->start + scan->length;\r
- extra = oldend - (segstart+seglength);\r
- if (extra < 0)\r
- Quit ("MML_UseSpace: Segment spans two blocks!");\r
-\r
- if (segstart == scan->start)\r
- {\r
- last->next = scan->next; // unlink block\r
- FREEBLOCK(scan);\r
- scan = last;\r
- }\r
- else\r
- scan->length = segstart-scan->start; // shorten block\r
-\r
- if (extra > 0)\r
- {\r
- GETNEWBLOCK;\r
- mmnew->useptr = NULL;\r
-\r
- mmnew->next = scan->next;\r
- scan->next = mmnew;\r
- mmnew->start = segstart+seglength;\r
- mmnew->length = extra;\r
- mmnew->attributes = LOCKBIT;\r
- }\r
-\r
-}\r
-\r
-//==========================================================================\r
-\r
-/*\r
-====================\r
-=\r
-= MML_ClearBlock\r
-=\r
-= We are out of blocks, so free a purgable block\r
-=\r
-====================\r
-*/\r
-\r
-void MML_ClearBlock (void)\r
-{\r
- mmblocktype far *scan,far *last;\r
-\r
- scan = mmhead->next;\r
-\r
- while (scan)\r
- {\r
- if (!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS) )\r
- {\r
- MM_FreePtr(scan->useptr);\r
- return;\r
- }\r
- scan = scan->next;\r
- }\r
-\r
- Quit ("MM_ClearBlock: No purgable blocks!");\r
-}\r
-\r
-\r
-//==========================================================================\r
-\r
-/*\r
-===================\r
-=\r
-= MM_Startup\r
-=\r
-= Grabs all space from turbo with malloc/farmalloc\r
-= Allocates bufferseg misc buffer\r
-=\r
-===================\r
-*/\r
-\r
-static char *ParmStrings[] = {"noems","noxms",""};\r
-\r
-void MM_Startup (void)\r
-{\r
- int i;\r
- unsigned long length;\r
- void far *start;\r
- unsigned segstart,seglength,endfree;\r
-\r
- if (mmstarted)\r
- MM_Shutdown ();\r
-\r
-\r
- mmstarted = true;\r
- bombonerror = true;\r
-//\r
-// set up the linked list (everything in the free list;\r
-//\r
- mmhead = NULL;\r
- mmfree = &mmblocks[0];\r
- for (i=0;i<MAXBLOCKS-1;i++)\r
- mmblocks[i].next = &mmblocks[i+1];\r
- mmblocks[i].next = NULL;\r
-\r
-//\r
-// locked block of all memory until we punch out free space\r
-//\r
- GETNEWBLOCK;\r
- mmhead = mmnew; // this will allways be the first node\r
- mmnew->start = 0;\r
- mmnew->length = 0xffff;\r
- mmnew->attributes = LOCKBIT;\r
- mmnew->next = NULL;\r
- mmrover = mmhead;\r
-\r
-\r
-//\r
-// get all available near conventional memory segments\r
-//\r
- length=coreleft();\r
- start = (void far *)(nearheap = malloc(length));\r
-\r
- length -= 16-(FP_OFF(start)&15);\r
- length -= SAVENEARHEAP;\r
- seglength = length / 16; // now in paragraphs\r
- segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;\r
- MML_UseSpace (segstart,seglength);\r
- mminfo.nearheap = length;\r
-\r
-//\r
-// get all available far conventional memory segments\r
-//\r
- length=farcoreleft();\r
- start = farheap = farmalloc(length);\r
- length -= 16-(FP_OFF(start)&15);\r
- length -= SAVEFARHEAP;\r
- seglength = length / 16; // now in paragraphs\r
- segstart = FP_SEG(start)+(FP_OFF(start)+15)/16;\r
- MML_UseSpace (segstart,seglength);\r
- mminfo.farheap = length;\r
- mminfo.mainmem = mminfo.nearheap + mminfo.farheap;\r
-\r
-//\r
-// allocate the misc buffer\r
-//\r
- mmrover = mmhead; // start looking for space after low block\r
-\r
- MM_GetPtr (&bufferseg,BUFFERSIZE);\r
-}\r
-\r
-//==========================================================================\r
-\r
-/*\r
-====================\r
-=\r
-= MM_Shutdown\r
-=\r
-= Frees all conventional, EMS, and XMS allocated\r
-=\r
-====================\r
-*/\r
-\r
-void MM_Shutdown (void)\r
-{\r
- if (!mmstarted)\r
- return;\r
-\r
- farfree (farheap);\r
- free (nearheap);\r
-// MML_ShutdownXMS ();\r
-}\r
-\r
-//==========================================================================\r
-\r
-/*\r
-====================\r
-=\r
-= MM_GetPtr\r
-=\r
-= Allocates an unlocked, unpurgable block\r
-=\r
-====================\r
-*/\r
-\r
-void MM_GetPtr (memptr *baseptr,unsigned long size)\r
-{\r
- mmblocktype far *scan,far *lastscan,far *endscan\r
- ,far *purge,far *next;\r
- int search;\r
- unsigned needed,startseg;\r
-\r
- needed = (size+15)/16; // convert size from bytes to paragraphs\r
-\r
- GETNEWBLOCK; // fill in start and next after a spot is found\r
- mmnew->length = needed;\r
- mmnew->useptr = baseptr;\r
- mmnew->attributes = BASEATTRIBUTES;\r
-\r
-tryagain:\r
- for (search = 0; search<3; search++)\r
- {\r
- //\r
- // first search: try to allocate right after the rover, then on up\r
- // second search: search from the head pointer up to the rover\r
- // third search: compress memory, then scan from start\r
- if (search == 1 && mmrover == mmhead)\r
- search++;\r
-\r
- switch (search)\r
- {\r
- case 0:\r
- lastscan = mmrover;\r
- scan = mmrover->next;\r
- endscan = NULL;\r
- break;\r
- case 1:\r
- lastscan = mmhead;\r
- scan = mmhead->next;\r
- endscan = mmrover;\r
- break;\r
- case 2:\r
- MM_SortMem ();\r
- lastscan = mmhead;\r
- scan = mmhead->next;\r
- endscan = NULL;\r
- break;\r
- }\r
-\r
- startseg = lastscan->start + lastscan->length;\r
-\r
- while (scan != endscan)\r
- {\r
- if (scan->start - startseg >= needed)\r
- {\r
- //\r
- // got enough space between the end of lastscan and\r
- // the start of scan, so throw out anything in the middle\r
- // and allocate the new block\r
- //\r
- purge = lastscan->next;\r
- lastscan->next = mmnew;\r
- mmnew->start = *(unsigned *)baseptr = startseg;\r
- mmnew->next = scan;\r
- while ( purge != scan)\r
- { // free the purgable block\r
- next = purge->next;\r
- FREEBLOCK(purge);\r
- purge = next; // purge another if not at scan\r
- }\r
- mmrover = mmnew;\r
- return; // good allocation!\r
- }\r
-\r
- //\r
- // if this block is purge level zero or locked, skip past it\r
- //\r
- if ( (scan->attributes & LOCKBIT)\r
- || !(scan->attributes & PURGEBITS) )\r
- {\r
- lastscan = scan;\r
- startseg = lastscan->start + lastscan->length;\r
- }\r
-\r
-\r
- scan=scan->next; // look at next line\r
- }\r
- }\r
-\r
- if (bombonerror)\r
- {\r
-\r
-extern char configname[];\r
-extern boolean insetupscaling;\r
-extern int viewsize;\r
-boolean SetViewSize (unsigned width, unsigned height);\r
-#define HEIGHTRATIO 0.50\r
-//\r
-// wolf hack -- size the view down\r
-//\r
- if (!insetupscaling && viewsize>10)\r
- {\r
-mmblocktype far *savedmmnew;\r
- savedmmnew = mmnew;\r
- viewsize -= 2;\r
- SetViewSize (viewsize*16,viewsize*16*HEIGHTRATIO);\r
- mmnew = savedmmnew;\r
- goto tryagain;\r
- }\r
-\r
-// unlink(configname);\r
- Quit ("MM_GetPtr: Out of memory!");\r
- }\r
- else\r
- mmerror = true;\r
-}\r
-\r
-//==========================================================================\r
-\r
-/*\r
-====================\r
-=\r
-= MM_FreePtr\r
-=\r
-= Deallocates an unlocked, purgable block\r
-=\r
-====================\r
-*/\r
-\r
-void MM_FreePtr (memptr *baseptr)\r
-{\r
- mmblocktype far *scan,far *last;\r
-\r
- last = mmhead;\r
- scan = last->next;\r
-\r
- if (baseptr == mmrover->useptr) // removed the last allocated block\r
- mmrover = mmhead;\r
-\r
- while (scan->useptr != baseptr && scan)\r
- {\r
- last = scan;\r
- scan = scan->next;\r
- }\r
-\r
- if (!scan)\r
- Quit ("MM_FreePtr: Block not found!");\r
-\r
- last->next = scan->next;\r
-\r
- FREEBLOCK(scan);\r
-}\r
-//==========================================================================\r
-\r
-/*\r
-=====================\r
-=\r
-= MM_SetPurge\r
-=\r
-= Sets the purge level for a block (locked blocks cannot be made purgable)\r
-=\r
-=====================\r
-*/\r
-\r
-void MM_SetPurge (memptr *baseptr, int purge)\r
-{\r
- mmblocktype far *start;\r
-\r
- start = mmrover;\r
-\r
- do\r
- {\r
- if (mmrover->useptr == baseptr)\r
- break;\r
-\r
- mmrover = mmrover->next;\r
-\r
- if (!mmrover)\r
- mmrover = mmhead;\r
- else if (mmrover == start)\r
- Quit ("MM_SetPurge: Block not found!");\r
-\r
- } while (1);\r
-\r
- mmrover->attributes &= ~PURGEBITS;\r
- mmrover->attributes |= purge;\r
-}\r
-\r
-//==========================================================================\r
-\r
-/*\r
-=====================\r
-=\r
-= MM_SetLock\r
-=\r
-= Locks / unlocks the block\r
-=\r
-=====================\r
-*/\r
-\r
-void MM_SetLock (memptr *baseptr, boolean locked)\r
-{\r
- mmblocktype far *start;\r
-\r
- start = mmrover;\r
-\r
- do\r
- {\r
- if (mmrover->useptr == baseptr)\r
- break;\r
-\r
- mmrover = mmrover->next;\r
-\r
- if (!mmrover)\r
- mmrover = mmhead;\r
- else if (mmrover == start)\r
- Quit ("MM_SetLock: Block not found!");\r
-\r
- } while (1);\r
-\r
- mmrover->attributes &= ~LOCKBIT;\r
- mmrover->attributes |= locked*LOCKBIT;\r
-}\r
-\r
-//==========================================================================\r
-\r
-/*\r
-=====================\r
-=\r
-= MM_SortMem\r
-=\r
-= Throws out all purgable stuff and compresses movable blocks\r
-=\r
-=====================\r
-*/\r
-\r
-void MM_SortMem (void)\r
-{\r
- mmblocktype far *scan,far *last,far *next;\r
- unsigned start,length,source,dest;\r
- int playing;\r
-\r
- //\r
- // lock down a currently playing sound\r
- //\r
- playing = SD_SoundPlaying ();\r
- if (playing)\r
- {\r
- switch (SoundMode)\r
- {\r
- case sdm_PC:\r
- playing += STARTPCSOUNDS;\r
- break;\r
- case sdm_AdLib:\r
- playing += STARTADLIBSOUNDS;\r
- break;\r
- }\r
- MM_SetLock(&(memptr)audiosegs[playing],true);\r
- }\r
-\r
-\r
- SD_StopSound();\r
-\r
- if (beforesort)\r
- beforesort();\r
-\r
- scan = mmhead;\r
-\r
- last = NULL; // shut up compiler warning\r
-\r
- while (scan)\r
- {\r
- if (scan->attributes & LOCKBIT)\r
- {\r
- //\r
- // block is locked, so try to pile later blocks right after it\r
- //\r
- start = scan->start + scan->length;\r
- }\r
- else\r
- {\r
- if (scan->attributes & PURGEBITS)\r
- {\r
- //\r
- // throw out the purgable block\r
- //\r
- next = scan->next;\r
- FREEBLOCK(scan);\r
- last->next = next;\r
- scan = next;\r
- continue;\r
- }\r
- else\r
- {\r
- //\r
- // push the non purgable block on top of the last moved block\r
- //\r
- if (scan->start != start)\r
- {\r
- length = scan->length;\r
- source = scan->start;\r
- dest = start;\r
- while (length > 0xf00)\r
- {\r
- movedata(source,0,dest,0,0xf00*16);\r
- length -= 0xf00;\r
- source += 0xf00;\r
- dest += 0xf00;\r
- }\r
- movedata(source,0,dest,0,length*16);\r
-\r
- scan->start = start;\r
- *(unsigned *)scan->useptr = start;\r
- }\r
- start = scan->start + scan->length;\r
- }\r
- }\r
-\r
- last = scan;\r
- scan = scan->next; // go to next block\r
- }\r
-\r
- mmrover = mmhead;\r
-\r
- if (aftersort)\r
- aftersort();\r
-\r
- if (playing)\r
- MM_SetLock(&(memptr)audiosegs[playing],false);\r
-}\r
-\r
-\r
-//==========================================================================\r
-\r
-/*\r
-=====================\r
-=\r
-= MM_ShowMemory\r
-=\r
-=====================\r
-*/\r
-\r
-void MM_ShowMemory (void)\r
-{\r
- mmblocktype far *scan;\r
- unsigned color,temp,x,y;\r
- long end,owner;\r
- char scratch[80],str[10];\r
-\r
- temp = bufferofs;\r
- bufferofs = displayofs;\r
- scan = mmhead;\r
-\r
- end = -1;\r
-\r
- while (scan)\r
- {\r
- if (scan->attributes & PURGEBITS)\r
- color = 5; // dark purple = purgable\r
- else\r
- color = 9; // medium blue = non purgable\r
- if (scan->attributes & LOCKBIT)\r
- color = 12; // red = locked\r
- if (scan->start<=end)\r
- Quit ("MM_ShowMemory: Memory block order currupted!");\r
- end = scan->length-1;\r
- y = scan->start/320;\r
- x = scan->start%320;\r
- VW_Hlin(x,x+end,y,color);\r
- VW_Plot(x,y,15);\r
- if (scan->next && scan->next->start > end+1)\r
- VW_Hlin(x+end+1,x+(scan->next->start-scan->start),y,0); // black = free\r
-\r
- scan = scan->next;\r
- }\r
-\r
- VW_FadeIn ();\r
- IN_Ack();\r
-\r
- bufferofs = temp;\r
-}\r
-\r
-//==========================================================================\r
-\r
-/*\r
-=====================\r
-=\r
-= MM_DumpData\r
-=\r
-=====================\r
-*/\r
-\r
-void MM_DumpData (void)\r
-{\r
- mmblocktype far *scan,far *best;\r
- long lowest,oldlowest;\r
- unsigned owner;\r
- char lock,purge;\r
- FILE *dumpfile;\r
-\r
-\r
- free (nearheap);\r
- dumpfile = fopen ("MMDUMP.TXT","w");\r
- if (!dumpfile)\r
- Quit ("MM_DumpData: Couldn't open MMDUMP.TXT!");\r
-\r
- lowest = -1;\r
- do\r
- {\r
- oldlowest = lowest;\r
- lowest = 0xffff;\r
-\r
- scan = mmhead;\r
- while (scan)\r
- {\r
- owner = (unsigned)scan->useptr;\r
-\r
- if (owner && owner<lowest && owner > oldlowest)\r
- {\r
- best = scan;\r
- lowest = owner;\r
- }\r
-\r
- scan = scan->next;\r
- }\r
-\r
- if (lowest != 0xffff)\r
- {\r
- if (best->attributes & PURGEBITS)\r
- purge = 'P';\r
- else\r
- purge = '-';\r
- if (best->attributes & LOCKBIT)\r
- lock = 'L';\r
- else\r
- lock = '-';\r
- fprintf (dumpfile,"0x%p (%c%c) = %u\n"\r
- ,(unsigned)lowest,lock,purge,best->length);\r
- }\r
-\r
- } while (lowest != 0xffff);\r
-\r
- fclose (dumpfile);\r
- Quit ("MMDUMP.TXT created.");\r
-}\r
-\r
-//==========================================================================\r
-\r
-\r
-/*\r
-======================\r
-=\r
-= MM_UnusedMemory\r
-=\r
-= Returns the total free space without purging\r
-=\r
-======================\r
-*/\r
-\r
-long MM_UnusedMemory (void)\r
-{\r
- unsigned free;\r
- mmblocktype far *scan;\r
-\r
- free = 0;\r
- scan = mmhead;\r
-\r
- while (scan->next)\r
- {\r
- free += scan->next->start - (scan->start + scan->length);\r
- scan = scan->next;\r
- }\r
-\r
- return free*16l;\r
-}\r
-\r
-//==========================================================================\r
-\r
-\r
-/*\r
-======================\r
-=\r
-= MM_TotalFree\r
-=\r
-= Returns the total free space with purging\r
-=\r
-======================\r
-*/\r
-\r
-long MM_TotalFree (void)\r
-{\r
- unsigned free;\r
- mmblocktype far *scan;\r
-\r
- free = 0;\r
- scan = mmhead;\r
-\r
- while (scan->next)\r
- {\r
- if ((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT))\r
- free += scan->length;\r
- free += scan->next->start - (scan->start + scan->length);\r
- scan = scan->next;\r
- }\r
-\r
- return free*16l;\r
-}\r
-\r
-//==========================================================================\r
-\r
-/*\r
-=====================\r
-=\r
-= MM_BombOnError\r
-=\r
-=====================\r
-*/\r
-\r
-void MM_BombOnError (boolean bomb)\r
-{\r
- bombonerror = bomb;\r
-}\r
-\r
-\r
projects / 16.git / blobdiff