X-Git-Url: http://4ch.mooo.com/gitweb/?a=blobdiff_plain;f=src%2Flib%2F16_mm.c;h=9dbc0eef1ff3be4e25b975607b86cc36571d4543;hb=5ab89616163e37b41b208796e3455b891bda44dc;hp=570ec346b32cc937508075dfc09b89440394d867;hpb=b1535620486d6df15b0434c64724412e73565a15;p=16.git diff --git a/src/lib/16_mm.c b/src/lib/16_mm.c index 570ec346..9dbc0eef 100644 --- a/src/lib/16_mm.c +++ b/src/lib/16_mm.c @@ -1,1149 +1,1178 @@ -/* Catacomb Armageddon Source Code - * Copyright (C) 1993-2014 Flat Rock Software - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -// NEWMM.C - -/* -============================================================================= - - ID software memory manager - -------------------------- - -Primary coder: John Carmack - -RELIES ON ---------- -Quit (char *error) function - - -WORK TO DO ----------- -MM_SizePtr to change the size of a given pointer - -Multiple purge levels utilized - -EMS / XMS unmanaged routines - -============================================================================= -*/ - -#include "src/lib/16_mm.h" - -/* -============================================================================= - - LOCAL INFO - -============================================================================= -*/ - -#define LOCKBIT 0x80 // if set in attributes, block cannot be moved -#define PURGEBITS 3 // 0-3 level, 0= unpurgable, 3= purge first -#define PURGEMASK 0xfffc -#define BASEATTRIBUTES 0 // unlocked, non purgable - -#define MAXUMBS 10 - -typedef struct mmblockstruct -{ - unsigned start,length; - unsigned attributes; - memptr *useptr; // pointer to the segment start - struct mmblockstruct far *next; -} mmblocktype; - - -//#define GETNEWBLOCK {if(!(mmnew=mmfree))Quit("MM_GETNEWBLOCK: No free blocks!");mmfree=mmfree->next;} -#define GETNEWBLOCK {if(!mmfree)MML_ClearBlock();mmnew=mmfree;mmfree=mmfree->next;} -#define FREEBLOCK(x) {*x->useptr=NULL;x->next=mmfree;mmfree=x;} - -/* -============================================================================= - - GLOBAL VARIABLES - -============================================================================= -*/ - -mminfotype mminfo; -memptr bufferseg; -boolean mmerror; - -void (* beforesort) (void); -void (* aftersort) (void); - -/* -============================================================================= - - LOCAL VARIABLES - -============================================================================= -*/ - -boolean mmstarted; - -void huge *hugeheap; -void far *farheap; -void *nearheap; - -mmblocktype far mmblocks[MAXBLOCKS] - ,far *mmhead,far *mmfree,far *mmrover,far *mmnew; - -boolean bombonerror; - -unsigned totalEMSpages,freeEMSpages,EMSpageframe,EMSpagesmapped,EMShandle; - -void (* XMSaddr) (void); // far pointer to XMS driver - -unsigned numUMBs,UMBbase[MAXUMBS]; - - -/* -====================== -= -= MML_CheckForEMS -= -= Routine from p36 of Extending DOS -= -======================= -*/ - -boolean MML_CheckForEMS (void) -{ - boolean emmcfems; - char emmname[] = "EMMXXXX0"; -// mov dx,OFFSET emmname - __asm { - LEA DX, emmname //fix by andrius4669 - mov ax,0x3d00 - int 0x21 // try to open EMMXXXX0 device - jc error - - mov bx,ax - mov ax,0x4400 - - int 0x21 // get device info - jc error - - and dx,0x80 - jz error - - mov ax,0x4407 - - int 0x21 // get status - jc error - or al,al - jz error - - mov ah,0x3e - int 0x21 // close handle - jc error - // - // EMS is good - // - mov emmcfems,1 - jmp End - error: - // - // EMS is bad - // - mov emmcfems,0 - End: - } - return(emmcfems); -} - - -/* -====================== -= -= MML_SetupEMS -= -======================= -*/ - -void MML_SetupEMS (void) -{ - char str[80],str2[10]; - unsigned err; - boolean errorflag=false; - union REGS CPURegs; - - totalEMSpages = freeEMSpages = EMSpageframe = EMSpagesmapped = 0; - - __asm - { - mov ah,EMS_STATUS - int EMS_INT // make sure EMS hardware is present - or ah,ah - jnz error - - mov ah,EMS_VERSION - int EMS_INT - or ah,ah - jnz error - cmp al,0x32 // only work on ems 3.2 or greater - jb error - - mov ah,EMS_GETFRAME - int EMS_INT // find the page frame address - or ah,ah - jnz error - mov [EMSpageframe],bx - - mov ah,EMS_GETPAGES - int EMS_INT // find out how much EMS is there - or ah,ah - jnz error - mov [totalEMSpages],dx - mov [freeEMSpages],bx - or bx,bx - jz noEMS // no EMS at all to allocate - - cmp bx,4 - jle getpages // there is only 1,2,3,or 4 pages - mov bx,4 // we can't use more than 4 pages - -getpages: - mov [EMSpagesmapped],bx - mov ah,EMS_ALLOCPAGES // allocate up to 64k of EMS - int EMS_INT - or ah,ah - jnz error - mov [EMShandle],dx - jmp End -error: - mov errorflag,1 - jmp End -noEMS: -End: - } - if(errorflag==true) - { - err = CPURegs.h.ah; - strcpy(str,"MML_SetupEMS: EMS error 0x"); - itoa(err,str2,16); - strcpy(str,str2); - printf("%s\n",str); - } -} - - -/* -====================== -= -= MML_ShutdownEMS -= -======================= -*/ - -void MML_ShutdownEMS (void) -{ - boolean errorflag=false; - if (!EMShandle) - return; - __asm - { - mov ah,EMS_FREEPAGES - mov dx,[EMShandle] - int EMS_INT - or ah,ah - jz ok - mov errorflag,1 - ok: - } - if(errorflag==true) printf("MML_ShutdownEMS: Error freeing EMS!"); //++++ add something -} - -/* -==================== -= -= MM_MapEMS -= -= Maps the 64k of EMS used by memory manager into the page frame -= for general use. This only needs to be called if you are keeping -= other things in EMS. -= -==================== -*/ - -void MM_MapEMS (void) -{ - char str[80],str2[10]; - unsigned err; - boolean errorflag=false; - int i; - union REGS CPURegs; - - for (i=0;istart+scan->length < segstart) - { - last = scan; - scan = scan->next; - } - -// -// take the given range out of the block -// - oldend = scan->start + scan->length; - extra = oldend - (segstart+seglength); - if (extra < 0) - { - printf("MML_UseSpace: Segment spans two blocks!"); - return; - } - - - if (segstart == scan->start) - { - last->next = scan->next; // unlink block - FREEBLOCK(scan); - scan = last; - } - else - scan->length = segstart-scan->start; // shorten block - - if (extra > 0) - { - GETNEWBLOCK; - mmnew->next = scan->next; - scan->next = mmnew; - mmnew->start = segstart+seglength; - mmnew->length = extra; - mmnew->attributes = LOCKBIT; - } - -} - -//========================================================================== - -/* -==================== -= -= MML_ClearBlock -= -= We are out of blocks, so free a purgable block -= -==================== -*/ - -void MML_ClearBlock (void) -{ - mmblocktype far *scan,far *last; - - scan = mmhead->next; - - while (scan) - { - if (!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS) ) - { - MM_FreePtr(scan->useptr); - return; - } - scan = scan->next; - } - - printf("MM_ClearBlock: No purgable blocks!"); -} - - -//========================================================================== - -/* -=================== -= -= MM_Startup -= -= Grabs all space from turbo with malloc/farmalloc -= Allocates bufferseg misc buffer -= -=================== -*/ - -static char *ParmStringsexmm[] = {"noems","noxms",""}; - -void MM_Startup (void) -{ - int i; - dword length; - void far *start; - unsigned segstart,seglength,endfree; - - if (mmstarted) - MM_Shutdown (); - - - mmstarted = true; - bombonerror = true; -// -// set up the linked list (everything in the free list; -// - mmhead = NULL; - mmfree = &mmblocks[0]; - for (i=0;istart = 0; - mmnew->length = 0xffff; - mmnew->attributes = LOCKBIT; - mmnew->next = NULL; - mmrover = mmhead; - - -// -// get all available near conventional memory segments -// -//---- length=coreleft(); - length=_memavl(); - start = (void far *)(nearheap = malloc(length)); - - length -= 16-(FP_OFF(start)&15); - length -= SAVENEARHEAP; - seglength = length / 16; // now in paragraphs - segstart = FP_SEG(start)+(FP_OFF(start)+15)/16; - MML_UseSpace (segstart,seglength); - mminfo.nearheap = length; - -// -// get all available far conventional memory segments -// -//---- length=farcoreleft(); - length=_memmax(); - start = farheap = _fmalloc(length); - length -= 16-(FP_OFF(start)&15); - length -= SAVEFARHEAP; - seglength = length / 16; // now in paragraphs - segstart = FP_SEG(start)+(FP_OFF(start)+15)/16; - MML_UseSpace (segstart,seglength); - mminfo.farheap = length; - mminfo.mainmem = mminfo.nearheap + mminfo.farheap; - - -// -// detect EMS and allocate up to 64K at page frame -// - mminfo.EMSmem = 0; - for (i = 1;i < __argc;i++) - { - if ( US_CheckParm(__argv[i],ParmStringsexmm) == 0) - goto emsskip; // param NOEMS - } - - if (MML_CheckForEMS()) - { - MML_SetupEMS(); // allocate space - MML_UseSpace (EMSpageframe,EMSpagesmapped*0x400); - MM_MapEMS(); // map in used pages - mminfo.EMSmem = EMSpagesmapped*0x4000l; - } - -// -// detect XMS and get upper memory blocks -// -emsskip: - mminfo.XMSmem = 0; - for (i = 1;i < __argc;i++) - { - if ( US_CheckParm(__argv[i],ParmStringsexmm) == 0) - goto xmsskip; // param NOXMS - } - - if (MML_CheckForXMS()) - MML_SetupXMS(); // allocate as many UMBs as possible - -// -// allocate the misc buffer -// -xmsskip: - mmrover = mmhead; // start looking for space after low block - - MM_GetPtr (&bufferseg,BUFFERSIZE); -} - -//========================================================================== - -/* -==================== -= -= MM_Shutdown -= -= Frees all conventional, EMS, and XMS allocated -= -==================== -*/ - -void MM_Shutdown (void) -{ - if (!mmstarted) - return; - - _ffree (farheap); - free (nearheap); - hfree(hugeheap); - MML_ShutdownEMS (); - MML_ShutdownXMS (); -} - -//========================================================================== - -/* -==================== -= -= MM_GetPtr -= -= Allocates an unlocked, unpurgable block -= -==================== -*/ - -void MM_GetPtr (memptr *baseptr,dword size) -{ - mmblocktype far *scan,far *lastscan,far *endscan - ,far *purge,far *next; - int search; - unsigned needed,startseg; - - needed = (size+15)/16; // convert size from bytes to paragraphs - - GETNEWBLOCK; // fill in start and next after a spot is found - mmnew->length = needed; - mmnew->useptr = baseptr; - mmnew->attributes = BASEATTRIBUTES; - - for (search = 0; search<3; search++) - { - // - // first search: try to allocate right after the rover, then on up - // second search: search from the head pointer up to the rover - // third search: compress memory, then scan from start - if (search == 1 && mmrover == mmhead) - search++; - - switch (search) - { - case 0: - lastscan = mmrover; - scan = mmrover->next; - endscan = NULL; - break; - case 1: - lastscan = mmhead; - scan = mmhead->next; - endscan = mmrover; - break; - case 2: - MM_SortMem (); - lastscan = mmhead; - scan = mmhead->next; - endscan = NULL; - break; - } - - startseg = lastscan->start + lastscan->length; - - while (scan != endscan) - { - if (scan->start - startseg >= needed) - { - // - // got enough space between the end of lastscan and - // the start of scan, so throw out anything in the middle - // and allocate the new block - // - purge = lastscan->next; - lastscan->next = mmnew; - mmnew->start = *(unsigned *)baseptr = startseg; - mmnew->next = scan; - while ( purge != scan) - { // free the purgable block - next = purge->next; - FREEBLOCK(purge); - purge = next; // purge another if not at scan - } - mmrover = mmnew; - return; // good allocation! - } - - // - // if this block is purge level zero or locked, skip past it - // - if ( (scan->attributes & LOCKBIT) - || !(scan->attributes & PURGEBITS) ) - { - lastscan = scan; - startseg = lastscan->start + lastscan->length; - } - - - scan=scan->next; // look at next line - } - } - - if (bombonerror) - printf(OUT_OF_MEM_MSG,(size-mminfo.nearheap)); - else - mmerror = true; -} - -//========================================================================== - -/* -==================== -= -= MM_FreePtr -= -= Allocates an unlocked, unpurgable block -= -==================== -*/ - -void MM_FreePtr (memptr *baseptr) -{ - mmblocktype far *scan,far *last; - - last = mmhead; - scan = last->next; - - if (baseptr == mmrover->useptr) // removed the last allocated block - mmrover = mmhead; - - while (scan->useptr != baseptr && scan) - { - last = scan; - scan = scan->next; - } - - if (!scan) - { - printf("MM_FreePtr: Block not found!"); - return; - } - - last->next = scan->next; - - FREEBLOCK(scan); -} -//========================================================================== - -/* -===================== -= -= MM_SetPurge -= -= Sets the purge level for a block (locked blocks cannot be made purgable) -= -===================== -*/ - -void MM_SetPurge (memptr *baseptr, int purge) -{ - mmblocktype far *start; - - start = mmrover; - - do - { - if (mmrover->useptr == baseptr) - break; - - mmrover = mmrover->next; - - if (!mmrover) - mmrover = mmhead; - else if (mmrover == start) - { - printf("MM_SetPurge: Block not found!"); - return; - } - - } while (1); - - mmrover->attributes &= ~PURGEBITS; - mmrover->attributes |= purge; -} - -//========================================================================== - -/* -===================== -= -= MM_SetLock -= -= Locks / unlocks the block -= -===================== -*/ - -void MM_SetLock (memptr *baseptr, boolean locked) -{ - mmblocktype far *start; - - start = mmrover; - - do - { - if (mmrover->useptr == baseptr) - break; - - mmrover = mmrover->next; - - if (!mmrover) - mmrover = mmhead; - else if (mmrover == start) - { - printf("MM_SetLock: Block not found!"); - return; - } - - } while (1); - - mmrover->attributes &= ~LOCKBIT; - mmrover->attributes |= locked*LOCKBIT; -} - -//========================================================================== - -/* -===================== -= -= MM_SortMem -= -= Throws out all purgable stuff and compresses movable blocks -= -===================== -*/ - -void MM_SortMem (void) -{ - mmblocktype far *scan,far *last,far *next; - unsigned start,length,source,dest,oldborder; - int playing; - - // - // lock down a currently playing sound - // -/*++++ playing = SD_SoundPlaying (); - if (playing) - { - switch (SoundMode) - { - case sdm_PC: - playing += STARTPCSOUNDS; - break; - case sdm_AdLib: - playing += STARTADLIBSOUNDS; - break; - } - MM_SetLock(&(memptr)audiosegs[playing],true); - } - - - SD_StopSound();*/ -// oldborder = bordercolor; -// VW_ColorBorder (15); - - if (beforesort) - beforesort(); - - scan = mmhead; - - last = NULL; // shut up compiler warning - - while (scan) - { - if (scan->attributes & LOCKBIT) - { - // - // block is locked, so try to pile later blocks right after it - // - start = scan->start + scan->length; - } - else - { - if (scan->attributes & PURGEBITS) - { - // - // throw out the purgable block - // - next = scan->next; - FREEBLOCK(scan); - last->next = next; - scan = next; - continue; - } - else - { - // - // push the non purgable block on top of the last moved block - // - if (scan->start != start) - { - length = scan->length; - source = scan->start; - dest = start; - while (length > 0xf00) - { - movedata(source,0,dest,0,0xf00*16); - length -= 0xf00; - source += 0xf00; - dest += 0xf00; - } - movedata(source,0,dest,0,length*16); - - scan->start = start; - *(unsigned *)scan->useptr = start; - } - start = scan->start + scan->length; - } - } - - last = scan; - scan = scan->next; // go to next block - } - - mmrover = mmhead; - - if (aftersort) - aftersort(); - -// VW_ColorBorder (oldborder); - -/*++++ if (playing) - MM_SetLock(&(memptr)audiosegs[playing],false);*/ -} - - -//========================================================================== - -//**** -#if 0 -/* -===================== -= -= MM_ShowMemory -= -===================== -*/ - -void MM_ShowMemory (void) -{ - mmblocktype far *scan; - unsigned color,temp; - long end,owner; - char scratch[80],str[10]; - -//**** VW_SetDefaultColors(); -//**** VW_SetLineWidth(40); - temp = bufferofs; - bufferofs = 0; -//**** VW_SetScreen (0,0); - - scan = mmhead; - - end = -1; - -//CA_OpenDebug (); - - while (scan) - { - if (scan->attributes & PURGEBITS) - color = 5; // dark purple = purgable - else - color = 9; // medium blue = non purgable - if (scan->attributes & LOCKBIT) - color = 12; // red = locked - if (scan->start<=end) - { - printf("MM_ShowMemory: Memory block order currupted!"); - return; - } - end = scan->start+scan->length-1; -//**** VW_Hlin(scan->start,(unsigned)end,0,color); -//**** VW_Plot(scan->start,0,15); -//**** if (scan->next->start > end+1) -//**** VW_Hlin(end+1,scan->next->start,0,0); // black = free - -//****#if 0 -strcpy (scratch,"Size:"); -ltoa ((long)scan->length*16,str,10); -strcat (scratch,str); -strcat (scratch,"\tOwner:0x"); -owner = (unsigned)scan->useptr; -ultoa (owner,str,16); -strcat (scratch,str); -strcat (scratch,"\n"); -//++++write (debughandle,scratch,strlen(scratch)); -//****#endif - - scan = scan->next; - } - -//CA_CloseDebug (); - - IN_Ack(); -//**** VW_SetLineWidth(64); - bufferofs = temp; -} -//**** -#endif - -//========================================================================== - - -/* -====================== -= -= MM_UnusedMemory -= -= Returns the total free space without purging -= -====================== -*/ - -long MM_UnusedMemory (void) -{ - unsigned free; - mmblocktype far *scan; - - free = 0; - scan = mmhead; - - while (scan->next) - { - free += scan->next->start - (scan->start + scan->length); - scan = scan->next; - } - - return free*16l; -} - -//========================================================================== - - -/* -====================== -= -= MM_TotalFree -= -= Returns the total free space with purging -= -====================== -*/ - -long MM_TotalFree (void) -{ - unsigned free; - mmblocktype far *scan; - - free = 0; - scan = mmhead; - - while (scan->next) - { - if ((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT)) - free += scan->length; - free += scan->next->start - (scan->start + scan->length); - scan = scan->next; - } - - return free*16l; -} - -//========================================================================== - -/* -===================== -= -= MM_BombOnError -= -===================== -*/ - -void MM_BombOnError (boolean bomb) -{ - bombonerror = bomb; -} - - +/* Catacomb Armageddon Source Code + * Copyright (C) 1993-2014 Flat Rock Software + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +// NEWMM.C + +/* +============================================================================= + + ID software memory manager + -------------------------- + +Primary coder: John Carmack + +RELIES ON +--------- +Quit (char *error) function + + +WORK TO DO +---------- +MM_SizePtr to change the size of a given pointer + +Multiple purge levels utilized + +EMS / XMS unmanaged routines + +============================================================================= +*/ + +#include "src/lib/16_mm.h" + +/* +====================== += += MML_CheckForEMS += += Routine from p36 of Extending DOS += +======================= +*/ + +boolean MML_CheckForEMS (void) +{ + boolean emmcfems; + char emmname[] = "EMMXXXX0"; +// mov dx,OFFSET emmname + __asm { + LEA DX, emmname //fix by andrius4669 + mov ax,0x3d00 + int 0x21 // try to open EMMXXXX0 device + jc error + + mov bx,ax + mov ax,0x4400 + + int 0x21 // get device info + jc error + + and dx,0x80 + jz error + + mov ax,0x4407 + + int 0x21 // get status + jc error + or al,al + jz error + + mov ah,0x3e + int 0x21 // close handle + jc error + // + // EMS is good + // + mov emmcfems,1 + jmp End + error: + // + // EMS is bad + // + mov emmcfems,0 + End: + } + return(emmcfems); +} + + +/* +====================== += += MML_SetupEMS += +======================= +*/ + +void MML_SetupEMS (void) +{ + char str[80],str2[10]; + unsigned err; + boolean errorflag=false; + union REGS CPURegs; + + EMSVer = 0; + totalEMSpages = freeEMSpages = EMSpageframe = EMSpagesmapped = 0; + + __asm + { + mov ah,EMS_STATUS + int EMS_INT // make sure EMS hardware is present + or ah,ah + jnz error + + mov ah,EMS_VERSION + int EMS_INT + or ah,ah + jnz error + mov [EMSVer],ax // set EMSVer + cmp al,0x32 // only work on ems 3.2 or greater + jb error + + mov ah,EMS_GETFRAME + int EMS_INT // find the page frame address + or ah,ah + jnz error + mov [EMSpageframe],bx + + mov ah,EMS_GETPAGES + int EMS_INT // find out how much EMS is there + or ah,ah + jnz error + mov [totalEMSpages],dx + mov [freeEMSpages],bx + or bx,bx + jz noEMS // no EMS at all to allocate + + cmp bx,4 + jle getpages // there is only 1,2,3,or 4 pages + mov bx,4 // we can't use more than 4 pages + +getpages: + mov [EMSpagesmapped],bx + mov ah,EMS_ALLOCPAGES // allocate up to 64k of EMS + int EMS_INT + or ah,ah + jnz error + mov [EMShandle],dx + jmp End +error: + mov errorflag,1 + jmp End +noEMS: +End: + } + if(errorflag==true) + { + err = CPURegs.h.ah; + strcpy(str,"MML_SetupEMS: EMS error 0x"); + itoa(err,str2,16); + strcpy(str,str2); + printf("%s\n",str); + } +} + + +/* +====================== += += MML_ShutdownEMS += +======================= +*/ + +void MML_ShutdownEMS (void) +{ + boolean errorflag=false; + if (!EMShandle) + return; + __asm + { + mov ah,EMS_FREEPAGES + mov dx,[EMShandle] + int EMS_INT + or ah,ah + jz ok + mov errorflag,1 + ok: + } + if(errorflag==true) printf("MML_ShutdownEMS: Error freeing EMS!"); //++++ add something +} + +/* +==================== += += MM_MapEMS += += Maps the 64k of EMS used by memory manager into the page frame += for general use. This only needs to be called if you are keeping += other things in EMS. += +==================== +*/ + +void MM_MapEMS (void) +{ + char str[80],str2[10]; + unsigned err; + boolean errorflag=false; + int i; + union REGS CPURegs; + + for (i=0;istart+scan->length < segstart) + { + last = scan; + scan = scan->next; + } + +// +// take the given range out of the block +// + oldend = scan->start + scan->length; + extra = oldend - (segstart+seglength); + if (extra < 0) + { + printf("MML_UseSpace: Segment spans two blocks!"); + return; + } + + + if (segstart == scan->start) + { + last->next = scan->next; // unlink block + FREEBLOCK(scan); + scan = last; + } + else + scan->length = segstart-scan->start; // shorten block + + if (extra > 0) + { + GETNEWBLOCK; + mmnew->next = scan->next; + scan->next = mmnew; + mmnew->start = segstart+seglength; + mmnew->length = extra; + mmnew->attributes = LOCKBIT; + } + +} + +//========================================================================== + +/* +==================== += += MML_ClearBlock += += We are out of blocks, so free a purgable block += +==================== +*/ + +void MML_ClearBlock (void) +{ + mmblocktype far *scan,far *last; + + scan = mmhead->next; + + while (scan) + { + if (!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS) ) + { + MM_FreePtr(scan->useptr); + return; + } + scan = scan->next; + } + + printf("MM_ClearBlock: No purgable blocks!"); +} + + +//========================================================================== + +/* +=================== += += MM_Startup += += Grabs all space from turbo with malloc/farmalloc += Allocates bufferseg misc buffer += +=================== +*/ + +void MM_Startup (void) +{ + int i; + dword length; + void far *start; + unsigned segstart,seglength,endfree; + + if (mminfo.mmstarted) + MM_Shutdown (); + + + mminfo.mmstarted = true; + mminfo.bombonerror = true; +// +// set up the linked list (everything in the free list; +// + mmhead = NULL; + mmfree = &mmblocks[0]; + for (i=0;istart = 0; + mmnew->length = 0xffff; + mmnew->attributes = LOCKBIT; + mmnew->next = NULL; + mmrover = mmhead; + + +// +// get all available near conventional memory segments +// +//---- length=coreleft(); + _nheapgrow(); + length=_memavl(); + start = (void far *)(nearheap = malloc(length)); + + length -= 16-(FP_OFF(start)&15); + length -= SAVENEARHEAP; + seglength = length / 16; // now in paragraphs + segstart = FP_SEG(start)+(FP_OFF(start)+15)/16; + MML_UseSpace (segstart,seglength); + mminfo.nearheap = length; + +// +// get all available far conventional memory segments +// +//---- length=farcoreleft(); + _fheapgrow(); + length=_memavl(); + start = farheap = _fmalloc(length); + length -= 16-(FP_OFF(start)&15); + length -= SAVEFARHEAP; + seglength = length / 16; // now in paragraphs + segstart = FP_SEG(start)+(FP_OFF(start)+15)/16; + MML_UseSpace (segstart,seglength); + mminfo.farheap = length; + mminfo.mainmem = mminfo.nearheap + mminfo.farheap; + + +// +// detect EMS and allocate up to 64K at page frame +// + mminfo.EMSmem = 0; + for (i = 1;i < __argc;i++) + { + if ( US_CheckParm(__argv[i],ParmStringsexmm) == 0) + goto emsskip; // param NOEMS + } + + if (MML_CheckForEMS()) + { + //printf("EMS1\n"); + MML_SetupEMS(); // allocate space + //printf("EMS2\n"); + MML_UseSpace (EMSpageframe,EMSpagesmapped*0x400); + //printf("EMS3\n"); + MM_MapEMS(); // map in used pages + //printf("EMS4\n"); + mminfo.EMSmem = EMSpagesmapped*0x4000l; + } + +// +// detect XMS and get upper memory blocks +// +emsskip: + mminfo.XMSmem = 0; + for (i = 1;i < __argc;i++) + { + if ( US_CheckParm(__argv[i],ParmStringsexmm) == 0) + goto xmsskip; // param NOXMS + } + + if (MML_CheckForXMS()) + { +// printf("XMS!\n"); + MML_SetupXMS(); // allocate as many UMBs as possible + } + +// +// allocate the misc buffer +// +xmsskip: + mmrover = mmhead; // start looking for space after low block + + MM_GetPtr (&bufferseg,BUFFERSIZE); +} + +//========================================================================== + +/* +==================== += += MM_Shutdown += += Frees all conventional, EMS, and XMS allocated += +==================== +*/ + +void MM_Shutdown (void) +{ + if (!mminfo.mmstarted) + return; + + _ffree (farheap); + free (nearheap); + hfree(hugeheap); + MML_ShutdownEMS (); + MML_ShutdownXMS (); +} + +//========================================================================== + +/* +==================== += += MM_GetPtr += += Allocates an unlocked, unpurgable block += +==================== +*/ + +void MM_GetPtr (memptr *baseptr,dword size) +{ + mmblocktype far *scan,far *lastscan,far *endscan + ,far *purge,far *next; + int search; + unsigned needed,startseg; + + needed = (size+15)/16; // convert size from bytes to paragraphs + + GETNEWBLOCK; // fill in start and next after a spot is found + mmnew->length = needed; + mmnew->useptr = baseptr; + mmnew->attributes = BASEATTRIBUTES; + + for (search = 0; search<3; search++) + { + // + // first search: try to allocate right after the rover, then on up + // second search: search from the head pointer up to the rover + // third search: compress memory, then scan from start + if (search == 1 && mmrover == mmhead) + search++; + + switch (search) + { + case 0: + lastscan = mmrover; + scan = mmrover->next; + endscan = NULL; + break; + case 1: + lastscan = mmhead; + scan = mmhead->next; + endscan = mmrover; + break; + case 2: + MM_SortMem (); + lastscan = mmhead; + scan = mmhead->next; + endscan = NULL; + break; + } + + startseg = lastscan->start + lastscan->length; + + while (scan != endscan) + { + if (scan->start - startseg >= needed) + { + // + // got enough space between the end of lastscan and + // the start of scan, so throw out anything in the middle + // and allocate the new block + // + purge = lastscan->next; + lastscan->next = mmnew; + mmnew->start = *(unsigned *)baseptr = startseg; + mmnew->next = scan; + while ( purge != scan) + { // free the purgable block + next = purge->next; + FREEBLOCK(purge); + purge = next; // purge another if not at scan + } + mmrover = mmnew; + return; // good allocation! + } + + // + // if this block is purge level zero or locked, skip past it + // + if ( (scan->attributes & LOCKBIT) + || !(scan->attributes & PURGEBITS) ) + { + lastscan = scan; + startseg = lastscan->start + lastscan->length; + } + + + scan=scan->next; // look at next line + } + } + + if (mminfo.bombonerror) + printf(OUT_OF_MEM_MSG,(size-mminfo.nearheap)); + else + mminfo.mmerror = true; +} + +//========================================================================== + +/* +==================== += += MM_FreePtr += += Allocates an unlocked, unpurgable block += +==================== +*/ + +void MM_FreePtr (memptr *baseptr) +{ + mmblocktype far *scan,far *last; + + last = mmhead; + scan = last->next; + + if (baseptr == mmrover->useptr) // removed the last allocated block + mmrover = mmhead; + + while (scan->useptr != baseptr && scan) + { + last = scan; + scan = scan->next; + } + + if (!scan) + { + printf("MM_FreePtr: Block not found!"); + return; + } + + last->next = scan->next; + + FREEBLOCK(scan); +} +//========================================================================== + +/* +===================== += += MM_SetPurge += += Sets the purge level for a block (locked blocks cannot be made purgable) += +===================== +*/ + +void MM_SetPurge (memptr *baseptr, int purge) +{ + mmblocktype far *start; + + start = mmrover; + + do + { + if (mmrover->useptr == baseptr) + break; + + mmrover = mmrover->next; + + if (!mmrover) + mmrover = mmhead; + else if (mmrover == start) + { + printf("MM_SetPurge: Block not found!"); + return; + } + + } while (1); + + mmrover->attributes &= ~PURGEBITS; + mmrover->attributes |= purge; +} + +//========================================================================== + +/* +===================== += += MM_SetLock += += Locks / unlocks the block += +===================== +*/ + +void MM_SetLock (memptr *baseptr, boolean locked) +{ + mmblocktype far *start; + + start = mmrover; + + do + { + if (mmrover->useptr == baseptr) + break; + + mmrover = mmrover->next; + + if (!mmrover) + mmrover = mmhead; + else if (mmrover == start) + { + printf("MM_SetLock: Block not found!"); + return; + } + + } while (1); + + mmrover->attributes &= ~LOCKBIT; + mmrover->attributes |= locked*LOCKBIT; +} + +//========================================================================== + +/* +===================== += += MM_SortMem += += Throws out all purgable stuff and compresses movable blocks += +===================== +*/ + +void MM_SortMem (void) +{ + mmblocktype far *scan,far *last,far *next; + unsigned start,length,source,dest,oldborder; + int playing; + + // + // lock down a currently playing sound + // +/*++++ playing = SD_SoundPlaying (); + if (playing) + { + switch (SoundMode) + { + case sdm_PC: + playing += STARTPCSOUNDS; + break; + case sdm_AdLib: + playing += STARTADLIBSOUNDS; + break; + } + MM_SetLock(&(memptr)audiosegs[playing],true); + } + + + SD_StopSound();*/ +// oldborder = bordercolor; +// VW_ColorBorder (15); + + if (beforesort) + beforesort(); + + scan = mmhead; + + last = NULL; // shut up compiler warning + + while (scan) + { + if (scan->attributes & LOCKBIT) + { + // + // block is locked, so try to pile later blocks right after it + // + start = scan->start + scan->length; + } + else + { + if (scan->attributes & PURGEBITS) + { + // + // throw out the purgable block + // + next = scan->next; + FREEBLOCK(scan); + last->next = next; + scan = next; + continue; + } + else + { + // + // push the non purgable block on top of the last moved block + // + if (scan->start != start) + { + length = scan->length; + source = scan->start; + dest = start; + while (length > 0xf00) + { + movedata(source,0,dest,0,0xf00*16); + length -= 0xf00; + source += 0xf00; + dest += 0xf00; + } + movedata(source,0,dest,0,length*16); + + scan->start = start; + *(unsigned *)scan->useptr = start; + } + start = scan->start + scan->length; + } + } + + last = scan; + scan = scan->next; // go to next block + } + + mmrover = mmhead; + + if (aftersort) + aftersort(); + +// VW_ColorBorder (oldborder); + +/*++++ if (playing) + MM_SetLock(&(memptr)audiosegs[playing],false);*/ +} + + +//========================================================================== + +//****#if 0 +/* +===================== += += MM_ShowMemory += +===================== +*/ + +void MM_ShowMemory (void) +{ + mmblocktype far *scan; + unsigned color,temp;//, i; + long end,owner; + char scratch[80],str[10]; + +//**** VW_SetDefaultColors(); +//**** VW_SetLineWidth(40); +//++++mh temp = bufferofs; +//++++mh bufferofs = 0; +//**** VW_SetScreen (0,0); + + scan = mmhead; + + end = -1; + +//CA_OpenDebug (); + + while (scan) + { + if (scan->attributes & PURGEBITS) + color = 5; // dark purple = purgable + else + color = 9; // medium blue = non purgable + if (scan->attributes & LOCKBIT) + color = 12; // red = locked + if (scan->start<=end) + { + printf("MM_ShowMemory: Memory block order currupted!"); + return; + } + end = scan->start+scan->length-1; +//++++ VW_Hlin(scan->start,(unsigned)end,0,color); +//++++ VW_Plot(scan->start,0,15); + if (scan->next->start > end+1) +//++++ VW_Hlin(end+1,scan->next->start,0,0); // black = free + +//****#if 0 +printf("Location:"); +printf("%Fp\t", scan->start); +strcpy (scratch,"Size:"); +ltoa ((long)scan->length*16,str,10); +strcat (scratch,str); +strcat (scratch,"\tOwner:0x"); +owner = (unsigned)scan->useptr; +ultoa (owner,str,16); +strcat (scratch,str); +strcat (scratch,"\n"); +//++++write (debughandle,scratch,strlen(scratch)); +fprintf(stdout, "%s", scratch); +//****#endif + + scan = scan->next; + } + +//CA_CloseDebug (); + +//++++mh IN_Ack(); +//**** VW_SetLineWidth(64); +//++++mh bufferofs = temp; +} +//****#endif + +//========================================================================== + + +/* +====================== += += MM_UnusedMemory += += Returns the total free space without purging += +====================== +*/ + +dword MM_UnusedMemory (void) +{ + unsigned free; + mmblocktype far *scan; + + free = 0; + scan = mmhead; + + while (scan->next) + { + free += scan->next->start - (scan->start + scan->length); + scan = scan->next; + } + +// return free*16l; + return free; +} + +//========================================================================== + + +/* +====================== += += MM_TotalFree += += Returns the total free space with purging += +====================== +*/ + +dword MM_TotalFree (void) +{ + unsigned free; + mmblocktype far *scan; + + free = 0; + scan = mmhead; + + while (scan->next) + { + if ((scan->attributes&PURGEBITS) && !(scan->attributes&LOCKBIT)) + free += scan->length; + free += scan->next->start - (scan->start + scan->length); + scan = scan->next; + } + +// return free*16l; + return free; +} + +//========================================================================== + +/* +===================== += += MM_Report += +===================== +*/ + +void MM_Report(void) +{ + printf("EMM %x available\n", EMSVer); + printf("totalEMSpages=%u\n", totalEMSpages); + printf("freeEMSpages=%u\n", freeEMSpages); + printf("EMSpageframe=%Fp\n", EMSpageframe); + printf("near=%lu\n", mminfo.nearheap); + printf("far=%lu\n", mminfo.farheap); + printf("EMSmem=%lu\n", mminfo.EMSmem); + printf("XMSmem=%lu\n", mminfo.XMSmem); + printf("mainmem=%lu\n", mminfo.mainmem); + printf("UnusedMemory=%lu\n", MM_UnusedMemory()); + printf("TotalFree=%lu\n", MM_TotalFree()); +// printf("\n"); +// printf("UnusedMemory=%lu kb\n", MM_UnusedMemory()/10248); +// printf("TotalFree=%lu kb\n", MM_TotalFree()/10248); +} + +//========================================================================== + +/* +===================== += += MM_EMSVer += +===================== + + +int MM_EMSVer(void) +{ + int EMSver; + __asm + { + mov ah,EMS_VERSION + int EMS_INT + mov EMSver,ax + } + return(EMSver); +}*/ + +//========================================================================== + +/* +===================== += += MM_BombOnError += +===================== +*/ + +void MM_BombOnError (boolean bomb) +{ + mminfo.bombonerror = bomb; +} + +//========================================================================== + +/////////////////////////////////////////////////////////////////////////// +// +// US_CheckParm() - checks to see if a string matches one of a set of +// strings. The check is case insensitive. The routine returns the +// index of the string that matched, or -1 if no matches were found +// +/////////////////////////////////////////////////////////////////////////// +int +US_CheckParm(char *parm,char **strings) +{ + char cp,cs, + *p,*s; + int i; + + while (!isalpha(*parm)) // Skip non-alphas + parm++; + + for (i = 0;*strings && **strings;i++) + { + for (s = *strings++,p = parm,cs = cp = 0;cs == cp;) + { + cs = *s++; + if (!cs) + return(i); + cp = *p++; + + if (isupper(cs)) + cs = tolower(cs); + if (isupper(cp)) + cp = tolower(cp); + } + } + return(-1); +} +