--- /dev/null
+/* Reconstructed Commander Keen 4-6 Source Code\r
+ * Copyright (C) 2021 K1n9_Duk3\r
+ *\r
+ * This file is primarily based on:\r
+ * Catacomb 3-D Source Code\r
+ * Copyright (C) 1993-2014 Flat Rock Software\r
+ *\r
+ * This program is free software; you can redistribute it and/or modify\r
+ * it under the terms of the GNU General Public License as published by\r
+ * the Free Software Foundation; either version 2 of the License, or\r
+ * (at your option) any later version.\r
+ *\r
+ * This program is distributed in the hope that it will be useful,\r
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\r
+ * GNU General Public License for more details.\r
+ *\r
+ * You should have received a copy of the GNU General Public License along\r
+ * with this program; if not, write to the Free Software Foundation, Inc.,\r
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.\r
+ */\r
+\r
+// 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_CheckForEMS\r
+=\r
+= Routine from p36 of Extending DOS\r
+=\r
+=======================\r
+*/\r
+\r
+char emmname[9] = "EMMXXXX0";\r
+\r
+boolean MML_CheckForEMS (void)\r
+{\r
+asm mov dx,OFFSET emmname[0]\r
+asm mov ax,0x3d00\r
+asm int 0x21 // try to open EMMXXXX0 device\r
+asm jc error\r
+\r
+asm mov bx,ax\r
+asm mov ax,0x4400\r
+\r
+asm int 0x21 // get device info\r
+asm jc error\r
+\r
+asm and dx,0x80\r
+asm jz error\r
+\r
+asm mov ax,0x4407\r
+\r
+asm int 0x21 // get status\r
+asm jc error\r
+asm or al,al\r
+asm jz error\r
+\r
+asm mov ah,0x3e\r
+asm int 0x21 // close handle\r
+asm jc error\r
+\r
+//\r
+// EMS is good\r
+//\r
+ return true;\r
+\r
+error:\r
+//\r
+// EMS is bad\r
+//\r
+ return false;\r
+}\r
+\r
+\r
+/*\r
+======================\r
+=\r
+= MML_SetupEMS\r
+=\r
+=======================\r
+*/\r
+\r
+void MML_SetupEMS (void)\r
+{\r
+ char str[80],str2[10];\r
+ unsigned error;\r
+\r
+ totalEMSpages = freeEMSpages = EMSpageframe = EMSpagesmapped = 0;\r
+\r
+asm {\r
+ mov ah,EMS_STATUS\r
+ int EMS_INT // make sure EMS hardware is present\r
+ or ah,ah\r
+ jnz error\r
+\r
+ mov ah,EMS_VERSION\r
+ int EMS_INT\r
+ or ah,ah\r
+ jnz error\r
+ cmp al,0x32 // only work on ems 3.2 or greater\r
+ jb error\r
+\r
+ mov ah,EMS_GETFRAME\r
+ int EMS_INT // find the page frame address\r
+ or ah,ah\r
+ jnz error\r
+ mov [EMSpageframe],bx\r
+\r
+ mov ah,EMS_GETPAGES\r
+ int EMS_INT // find out how much EMS is there\r
+ or ah,ah\r
+ jnz error\r
+ mov [totalEMSpages],dx\r
+ mov [freeEMSpages],bx\r
+ or bx,bx\r
+ jz noEMS // no EMS at all to allocate\r
+\r
+ cmp bx,4\r
+ jle getpages // there is only 1,2,3,or 4 pages\r
+ mov bx,4 // we can't use more than 4 pages\r
+ }\r
+\r
+getpages:\r
+asm {\r
+ mov [EMSpagesmapped],bx\r
+ mov ah,EMS_ALLOCPAGES // allocate up to 64k of EMS\r
+ int EMS_INT\r
+ or ah,ah\r
+ jnz error\r
+ mov [EMShandle],dx\r
+ }\r
+ return;\r
+\r
+error:\r
+ error = _AH;\r
+ strcpy (str,"MML_SetupEMS: EMS error 0x");\r
+ itoa(error,str2,16);\r
+ strcpy (str,str2);\r
+ Quit (str);\r
+\r
+noEMS:\r
+;\r
+}\r
+\r
+\r
+/*\r
+======================\r
+=\r
+= MML_ShutdownEMS\r
+=\r
+=======================\r
+*/\r
+\r
+void MML_ShutdownEMS (void)\r
+{\r
+ if (!EMShandle)\r
+ return;\r
+\r
+asm {\r
+ mov ah,EMS_FREEPAGES\r
+ mov dx,[EMShandle]\r
+ int EMS_INT\r
+ or ah,ah\r
+ jz ok\r
+ }\r
+\r
+ Quit ("MML_ShutdownEMS: Error freeing EMS!");\r
+\r
+ok:\r
+;\r
+}\r
+\r
+/*\r
+====================\r
+=\r
+= MM_MapEMS\r
+=\r
+= Maps the 64k of EMS used by memory manager into the page frame\r
+= for general use. This only needs to be called if you are keeping\r
+= other things in EMS.\r
+=\r
+====================\r
+*/\r
+\r
+void MM_MapEMS (void)\r
+{\r
+ char str[80],str2[10];\r
+ unsigned error;\r
+ int i;\r
+\r
+ for (i=0;i<EMSpagesmapped;i++)\r
+ {\r
+ asm {\r
+ mov ah,EMS_MAPPAGE\r
+ mov bx,[i] // logical page\r
+ mov al,bl // physical page\r
+ mov dx,[EMShandle] // handle\r
+ int EMS_INT\r
+ or ah,ah\r
+ jnz error\r
+ }\r
+ }\r
+\r
+ return;\r
+\r
+error:\r
+ error = _AH;\r
+ strcpy (str,"MM_MapEMS: EMS error 0x");\r
+ itoa(error,str2,16);\r
+ strcpy (str,str2);\r
+ Quit (str);\r
+}\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
+ 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; // Keen addition\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
+//\r
+// detect EMS and allocate up to 64K at page frame\r
+//\r
+ mminfo.EMSmem = 0;\r
+ for (i = 1;i < _argc;i++)\r
+ {\r
+ if ( US_CheckParm(_argv[i],ParmStrings) == 0)\r
+ goto emsskip; // param NOEMS\r
+ }\r
+\r
+ if (MML_CheckForEMS())\r
+ {\r
+ MML_SetupEMS(); // allocate space\r
+ MML_UseSpace (EMSpageframe,EMSpagesmapped*0x400);\r
+ MM_MapEMS(); // map in used pages\r
+ mminfo.EMSmem = EMSpagesmapped*0x4000l;\r
+ }\r
+\r
+//\r
+// detect XMS and get upper memory blocks\r
+//\r
+emsskip:\r
+ mminfo.XMSmem = 0;\r
+ for (i = 1;i < _argc;i++)\r
+ {\r
+ if ( US_CheckParm(_argv[i],ParmStrings) == 0) // BUG: NOXMS is index 1, not 0\r
+ goto xmsskip; // param NOXMS\r
+ }\r
+\r
+ if (MML_CheckForXMS())\r
+ MML_SetupXMS(); // allocate as many UMBs as possible\r
+\r
+//\r
+// allocate the misc buffer\r
+//\r
+xmsskip:\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_ShutdownEMS ();\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
+ 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
+ Quit ("MM_GetPtr: Out of memory!");\r
+ else\r
+ mmerror = true;\r
+}\r
+\r
+//==========================================================================\r
+\r
+/*\r
+====================\r
+=\r
+= MM_FreePtr\r
+=\r
+= Allocates an unlocked, unpurgable 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,oldborder;\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
+ oldborder = bordercolor;\r
+ VW_ColorBorder (15);\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
+ VW_ColorBorder (oldborder);\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;\r
+ long end,owner;\r
+ char scratch[80],str[10];\r
+\r
+ VW_SetDefaultColors();\r
+ VW_SetLineWidth(40);\r
+ temp = bufferofs;\r
+ bufferofs = 0;\r
+ VW_SetScreen (0,0);\r
+\r
+ scan = mmhead;\r
+\r
+ end = -1;\r
+\r
+//CA_OpenDebug ();\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 corrupted!");\r
+ end = scan->start+scan->length-1;\r
+ VW_Hlin(scan->start,(unsigned)end,0,color);\r
+ VW_Plot(scan->start,0,15);\r
+ if (scan->next->start > end+1)\r
+ VW_Hlin(end+1,scan->next->start,0,0); // black = free\r
+\r
+#if 0\r
+strcpy (scratch,"Size:");\r
+ltoa ((long)scan->length*16,str,10);\r
+strcat (scratch,str);\r
+strcat (scratch,"\tOwner:0x");\r
+owner = (unsigned)scan->useptr;\r
+ultoa (owner,str,16);\r
+strcat (scratch,str);\r
+strcat (scratch,"\n");\r
+write (debughandle,scratch,strlen(scratch));\r
+#endif\r
+\r
+ scan = scan->next;\r
+ }\r
+\r
+//CA_CloseDebug ();\r
+\r
+ IN_Ack();\r
+ VW_SetLineWidth(64);\r
+ bufferofs = temp;\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