-/* Catacomb Apocalypse 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 "src/lib/16_mm.h"\r
-
-/*\r
-=============================================================================\r
-\r
- GLOBAL VARIABLES\r
-\r
-=============================================================================\r
-*/\r
-\r
-//mminfo_t mminfo;\r
-//memptr bufferseg;\r
-//boolean mmerror;\r
-\r
-void (* beforesort) (void);\r
+/* Catacomb Apocalypse 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"
+
+/*
+=============================================================================
+
+ GLOBAL VARIABLES
+
+=============================================================================
+*/
+
+//mminfo_t mminfo;
+//memptr bufferseg;
+//boolean mmerror;
+
+void (* beforesort) (void);
void (* aftersort) (void);
-void (* XMSaddr) (void); // far pointer to XMS driver\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],far *mmhead,far *mmfree,far *mmrover,far *mmnew;\r
-\r
-//boolean bombonerror;\r
-\r
+void (* XMSaddr) (void); // far pointer to XMS driver
+
+/*
+=============================================================================
+
+ LOCAL VARIABLES
+
+=============================================================================
+*/
+
+//boolean mmstarted;
+
+//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;
-//unsigned int EMSVer;\r
-\r
-//void (* XMSaddr) (void); // far pointer to XMS driver\r
-\r
+//unsigned int EMSVer;
+
+//void (* XMSaddr) (void); // far pointer to XMS driver
+
//unsigned numUMBs,UMBbase[MAXUMBS];
static char *ParmStringsexmm[] = {"noems","noxms",""};
-\r
-/*\r
-======================\r
-=\r
-= MML_CheckForEMS\r
-=\r
-= Routine from p36 of Extending DOS\r
-=\r
-=======================\r
-*/\r
-\r
-boolean MML_CheckForEMS(void)\r
-{\r
- boolean emmcfems;\r
- char emmname[] = "EMMXXXX0";\r
-// mov dx,OFFSET emmname\r
- __asm {\r
- LEA DX, emmname //fix by andrius4669\r
- mov ax,0x3d00\r
- int 0x21 // try to open EMMXXXX0 device\r
- jc error\r
-\r
- mov bx,ax\r
- mov ax,0x4400\r
-\r
- int 0x21 // get device info\r
- jc error\r
-\r
- and dx,0x80\r
- jz error\r
-\r
- mov ax,0x4407\r
-\r
- int 0x21 // get status\r
- jc error\r
- or al,al\r
- jz error\r
-\r
- mov ah,0x3e\r
- int 0x21 // close handle\r
- jc error\r
- //\r
- // EMS is good\r
- //\r
- mov emmcfems,1\r
- jmp End\r
- error:\r
- //\r
- // EMS is bad\r
- //\r
- mov emmcfems,0\r
- End:\r
- }\r
- return(emmcfems);\r
-}\r
-\r
-\r
-/*\r
-======================\r
-=\r
-= MML_SetupEMS\r
-=\r
-=======================\r
-*/\r
-\r
-unsigned MML_SetupEMS(mminfo_t *mm)\r
-{\r
- char str[80],str2[10];\r
- unsigned err;\r
- boolean errorflag=false;\r
- union REGS CPURegs;\r
-\r
+
+/*
+======================
+=
+= 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
+=
+=======================
+*/
+
+unsigned MML_SetupEMS(mminfo_t *mm)
+{
+ char str[80],str2[10];
+ unsigned err;
+ boolean errorflag=false;
+ union REGS CPURegs;
+
unsigned int EMSVer = 0;
- unsigned totalEMSpages,freeEMSpages,EMSpageframe,EMSpagesmapped,EMShandle;\r
- totalEMSpages = freeEMSpages = EMSpageframe = EMSpagesmapped = 0;\r
-\r
- __asm\r
- {\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
- mov [EMSVer],ax // set EMSVer\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
-getpages:\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
- jmp End\r
-error:\r
- mov errorflag,1\r
- jmp End\r
-noEMS:\r
-End:\r
- }\r
- if(errorflag==true)\r
- {\r
- err = CPURegs.h.ah;\r
- strcpy(str,"MML_SetupEMS: EMS error 0x");\r
- itoa(err,str2,16);\r
- strcpy(str,str2);\r
+ unsigned totalEMSpages,freeEMSpages,EMSpageframe,EMSpagesmapped,EMShandle;
+ 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);
- return err;\r
+ return err;
}
mm->totalEMSpages=totalEMSpages;
mm->freeEMSpages=freeEMSpages;
mm->EMSpagesmapped=EMSpagesmapped;
mm->EMShandle=EMShandle;
mm->EMSVer=EMSVer;
- return 0;\r
-}\r
-\r
-\r
-/*\r
-======================\r
-=\r
-= MML_ShutdownEMS\r
-=\r
-=======================\r
-*/\r
-\r
-void MML_ShutdownEMS(mminfo_t *mm)\r
-{\r
+ return 0;
+}
+
+
+/*
+======================
+=
+= MML_ShutdownEMS
+=
+=======================
+*/
+
+void MML_ShutdownEMS(mminfo_t *mm)
+{
boolean errorflag=false;
unsigned EMShandle=mm->EMShandle;
- if(!EMShandle)\r
- return;\r
- __asm\r
- {\r
- mov ah,EMS_FREEPAGES\r
- mov dx,[EMShandle]\r
- int EMS_INT\r
- or ah,ah\r
- jz ok\r
- mov errorflag,1\r
- ok:\r
- }\r
- if(errorflag==true) printf("MML_ShutdownEMS: Error freeing EMS!"); //++++ add something\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
-unsigned MM_MapEMS(mminfo_t *mm)\r
-{\r
- char str[80],str2[10];\r
- unsigned err, EMShandle;\r
- boolean errorflag=false;\r
- int i;\r
+ 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.
+=
+====================
+*/
+
+unsigned MM_MapEMS(mminfo_t *mm)
+{
+ char str[80],str2[10];
+ unsigned err, EMShandle;
+ boolean errorflag=false;
+ int i;
union REGS CPURegs;
- EMShandle=mm->EMShandle;\r
-\r
- for (i=0;i<mm->EMSpagesmapped;i++)\r
- {\r
- __asm\r
- {\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
- jmp End\r
- error:\r
- mov errorflag,1\r
- End:\r
- }\r
- if(errorflag==true)\r
- {\r
- err = CPURegs.h.ah;\r
- strcpy(str,"MM_MapEMS: EMS error 0x");\r
- itoa(err,str2,16);\r
- strcpy(str,str2);\r
+ EMShandle=mm->EMShandle;
+
+ for (i=0;i<mm->EMSpagesmapped;i++)
+ {
+ __asm
+ {
+ mov ah,EMS_MAPPAGE
+ mov bx,[i] // logical page
+ mov al,bl // physical page
+ mov dx,[EMShandle] // handle
+ int EMS_INT
+ or ah,ah
+ jnz error
+ jmp End
+ error:
+ mov errorflag,1
+ End:
+ }
+ if(errorflag==true)
+ {
+ err = CPURegs.h.ah;
+ strcpy(str,"MM_MapEMS: EMS error 0x");
+ itoa(err,str2,16);
+ strcpy(str,str2);
printf("%s\n",str);
- return err;\r
- }\r
- }\r
- return 0;\r
-}\r
-\r
-//==========================================================================\r
-\r
-/*\r
-======================\r
-=\r
-= MML_CheckForXMS\r
-=\r
-= Check for XMM driver\r
-=\r
-=======================\r
-*/\r
-\r
-boolean MML_CheckForXMS(mminfo_t *mm)\r
-{\r
- boolean errorflag=false;\r
- mm->numUMBs = 0;\r
-\r
- __asm\r
- {\r
- mov ax,0x4300\r
- int 0x2f // query status of installed diver\r
- cmp al,0x80\r
- je good\r
- mov errorflag,1\r
- good:\r
- }\r
- if(errorflag==true) return false;\r
- else 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(mminfo_t *mm, mminfotype *mmi)\r
-{\r
- unsigned base,size;\r
-\r
- __asm\r
- {\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
-getmemory:\r
- __asm\r
- {\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
-gotone:\r
- mov [base],bx\r
- mov [size],dx\r
-done:\r
- }\r
- MML_UseSpace(base,size, mm);\r
- mmi->XMSmem += size*16;\r
- mm->UMBbase[mm->numUMBs] = base;\r
- mm->numUMBs++;\r
- if(mm->numUMBs < MAXUMBS)\r
- goto getmemory;\r
-}\r
-\r
-\r
-/*\r
-======================\r
-=\r
-= MML_ShutdownXMS\r
-=\r
-======================\r
-*/\r
-\r
-void MML_ShutdownXMS(mminfo_t *mm)\r
-{\r
- int i;\r
+ return err;
+ }
+ }
+ return 0;
+}
+
+//==========================================================================
+
+/*
+======================
+=
+= MML_CheckForXMS
+=
+= Check for XMM driver
+=
+=======================
+*/
+
+boolean MML_CheckForXMS(mminfo_t *mm)
+{
+ boolean errorflag=false;
+ mm->numUMBs = 0;
+
+ __asm
+ {
+ mov ax,0x4300
+ int 0x2f // query status of installed diver
+ cmp al,0x80
+ je good
+ mov errorflag,1
+ good:
+ }
+ if(errorflag==true) return false;
+ else return true;
+}
+
+
+/*
+======================
+=
+= MML_SetupXMS
+=
+= Try to allocate all upper memory block
+=
+=======================
+*/
+
+void MML_SetupXMS(mminfo_t *mm, mminfotype *mmi)
+{
+ unsigned base,size;
+
+ __asm
+ {
+ mov ax,0x4310
+ int 0x2f
+ mov [WORD PTR XMSaddr],bx
+ mov [WORD PTR XMSaddr+2],es // function pointer to XMS driver
+ }
+getmemory:
+ __asm
+ {
+ mov ah,XMS_ALLOCUMB
+ mov dx,0xffff // try for largest block possible
+ call [DWORD PTR XMSaddr]
+ or ax,ax
+ jnz gotone
+
+ cmp bl,0xb0 // error: smaller UMB is available
+ jne done;
+
+ mov ah,XMS_ALLOCUMB
+ call [DWORD PTR XMSaddr] // DX holds largest available UMB
+ or ax,ax
+ jz done // another error...
+
+gotone:
+ mov [base],bx
+ mov [size],dx
+done:
+ }
+ MML_UseSpace(base,size, mm);
+ mmi->XMSmem += size*16;
+ mm->UMBbase[mm->numUMBs] = base;
+ mm->numUMBs++;
+ if(mm->numUMBs < MAXUMBS)
+ goto getmemory;
+}
+
+
+/*
+======================
+=
+= MML_ShutdownXMS
+=
+======================
+*/
+
+void MML_ShutdownXMS(mminfo_t *mm)
+{
+ int i;
unsigned base;
-\r
- for (i=0;i<mm->numUMBs;i++)\r
- {\r
- base = mm->UMBbase[i];\r
- __asm\r
- {\r
- mov ah,XMS_FREEUMB\r
- mov dx,[base]\r
- call [DWORD PTR XMSaddr]\r
- }\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, mminfo_t *mm)\r
-{\r
- mmblocktype far *scan,far *last;\r
- unsigned oldend;\r
- long extra;\r
-\r
- scan = last = mm->mmhead;\r
- mm->mmrover = mm->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
- {\r
- printf("MML_UseSpace: Segment spans two blocks!");\r
- return;\r
- }\r
-\r
-\r
- if (segstart == scan->start)\r
- {\r
- last->next = scan->next; // unlink block\r
- MM_FreeBlock(scan, mm);\r
- scan = last;\r
- }\r
- else\r
- scan->length = segstart-scan->start; // shorten block\r
-\r
- if (extra > 0)\r
- {\r
- MM_GetNewBlock(mm);\r
- mm->mmnew->next = scan->next;\r
- scan->next = mm->mmnew;\r
- mm->mmnew->start = segstart+seglength;\r
- mm->mmnew->length = extra;\r
- mm->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(mminfo_t *mm)\r
-{\r
- mmblocktype far *scan,far *last;\r
-\r
- scan = mm->mmhead->next;\r
-\r
- while(scan)\r
- {\r
- if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS))\r
- {\r
- MM_FreePtr(scan->useptr, mm);\r
- return;\r
- }\r
- scan = scan->next;\r
- }\r
-\r
- printf("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
-void MM_Startup(mminfo_t *mm, mminfotype *mmi)\r
-{\r
- int i;\r
- dword length;\r
- void far *start;\r
- unsigned segstart,seglength,endfree;\r
-\r
- if(mm->mmstarted)\r
- MM_Shutdown(mm);\r
-\r
- mm->mmstarted = true;\r
- mm->bombonerror = true;\r
-//\r
-// set up the linked list (everything in the free list;\r
-//\r
- mm->mmhead = NULL;\r
- mm->mmfree = &(mm->mmblocks[0]);\r
+
+ for (i=0;i<mm->numUMBs;i++)
+ {
+ base = mm->UMBbase[i];
+ __asm
+ {
+ mov ah,XMS_FREEUMB
+ mov dx,[base]
+ call [DWORD PTR XMSaddr]
+ }
+ }
+}
+
+//==========================================================================
+
+/*
+======================
+=
+= MML_UseSpace
+=
+= Marks a range of paragraphs as usable by the memory manager
+= This is used to mark space for the near heap, far heap, ems page frame,
+= and upper memory blocks
+=
+======================
+*/
+
+void MML_UseSpace(unsigned segstart, unsigned seglength, mminfo_t *mm)
+{
+ mmblocktype far *scan,far *last;
+ unsigned oldend;
+ long extra;
+
+ scan = last = mm->mmhead;
+ mm->mmrover = mm->mmhead; // reset rover to start of memory
+
+//
+// search for the block that contains the range of segments
+//
+ while(scan->start+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
+ MM_FreeBlock(scan, mm);
+ scan = last;
+ }
+ else
+ scan->length = segstart-scan->start; // shorten block
+
+ if(extra > 0)
+ {
+ MM_GetNewBlock(mm);
+ mm->mmnew->next = scan->next;
+ scan->next = mm->mmnew;
+ mm->mmnew->start = segstart+seglength;
+ mm->mmnew->length = extra;
+ mm->mmnew->attributes = LOCKBIT;
+ }
+
+}
+
+//==========================================================================
+
+/*
+====================
+=
+= MML_ClearBlock
+=
+= We are out of blocks, so free a purgable block
+=
+====================
+*/
+
+void MML_ClearBlock(mminfo_t *mm)
+{
+ mmblocktype far *scan,far *last;
+
+ scan = mm->mmhead->next;
+
+ while(scan)
+ {
+ if(!(scan->attributes&LOCKBIT) && (scan->attributes&PURGEBITS))
+ {
+ MM_FreePtr(scan->useptr, mm);
+ 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(mminfo_t *mm, mminfotype *mmi)
+{
+ int i;
+ dword length;
+ void far *start;
+ unsigned segstart,seglength,endfree;
+
+ if(mm->mmstarted)
+ MM_Shutdown(mm);
+
+ mm->mmstarted = true;
+ mm->bombonerror = true;
+//
+// set up the linked list (everything in the free list;
+//
+ mm->mmhead = NULL;
+ mm->mmfree = &(mm->mmblocks[0]);
for(i=0;i<MAXBLOCKS-1;i++)
{
mm->mmblocks[i].next = &(mm->mmblocks[i+1]);
- }\r
- mm->mmblocks[i].next = NULL;\r
-\r
-//\r
-// locked block of all memory until we punch out free space\r
-//\r
- //GETNEWBLOCK;
- MM_GetNewBlock(mm);\r
- mm->mmhead = mm->mmnew; // this will allways be the first node\r
- mm->mmnew->start = 0;\r
- mm->mmnew->length = 0xffff;\r
- mm->mmnew->attributes = LOCKBIT;\r
- mm->mmnew->next = NULL;\r
- mm->mmrover = mm->mmhead;\r
-\r
-\r
-//\r
-// get all available near conventional memory segments\r
-//\r
+ }
+ mm->mmblocks[i].next = NULL;
+
+//
+// locked block of all memory until we punch out free space
+//
+ MM_GetNewBlock(mm);
+ mm->mmhead = mm->mmnew; // this will allways be the first node
+ mm->mmnew->start = 0;
+ mm->mmnew->length = 0xffff;
+ mm->mmnew->attributes = LOCKBIT;
+ mm->mmnew->next = NULL;
+ mm->mmrover = mm->mmhead;
+
+
+//
+// get all available near conventional memory segments
+//
//---- length=coreleft();
- _nheapgrow();\r
- length=_memavl();\r
- start = (void far *)(mm->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, mm);\r
- mmi->nearheap = length;\r
-\r
-//\r
-// get all available far conventional memory segments\r
-//\r
+ _nheapgrow();
+ length=_memavl();
+ start = (void far *)(mm->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, mm);
+ mmi->nearheap = length;
+
+//
+// get all available far conventional memory segments
+//
//---- length=farcoreleft();
- _fheapgrow();\r
- length=_memavl();\r
- start = mm->farheap = _fmalloc(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, mm);\r
- mmi->farheap = length;\r
- mmi->mainmem = mmi->nearheap + mmi->farheap;\r
-\r
-\r
-//\r
-// detect EMS and allocate up to 64K at page frame\r
-//\r
- mmi->EMSmem = 0;\r
- for(i = 1;i < __argc;i++)\r
- {\r
- if(US_CheckParm(__argv[i],ParmStringsexmm) == 0)\r
- goto emsskip; // param NOEMS\r
- }\r
-\r
- if(MML_CheckForEMS())\r
- {\r
- printf("EMS1\n");\r
- MML_SetupEMS(mm); // allocate space\r
- printf("EMS2\n");
-printf("segstart=%x\n", segstart);
-printf("mm->EMSpageframe=%x\n", mm->EMSpageframe);
- MML_UseSpace(mm->EMSpageframe,mm->EMSpagesmapped*0x400, mm);\r
- printf("EMS3\n");\r
- MM_MapEMS(mm); // map in used pages\r
- printf("EMS4\n");\r
- mmi->EMSmem = mm->EMSpagesmapped*0x4000l;\r
- }\r
-\r
-//\r
-// detect XMS and get upper memory blocks\r
-//\r
-emsskip:\r
- mmi->XMSmem = 0;\r
- for(i = 1;i < __argc;i++)\r
- {\r
- if ( US_CheckParm(__argv[i],ParmStringsexmm) == 0)\r
- goto xmsskip; // param NOXMS\r
- }\r
-\r
- if(MML_CheckForXMS(mm))\r
- {\r
- printf("XMS!\n");\r
- MML_SetupXMS(mm, mmi); // allocate as many UMBs as possible\r
- }\r
-\r
-//\r
-// allocate the misc buffer\r
-//\r
-xmsskip:\r
- mm->mmrover = mm->mmhead; // start looking for space after low block\r
-\r
- MM_GetPtr(&(mm->bufferseg),BUFFERSIZE, mm, mmi);\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(mminfo_t *mm)\r
-{\r
- if(!(mm->mmstarted))\r
- return;\r
-\r
+ _fheapgrow();
+ length=_memavl();
+ start = mm->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, mm);
+ mmi->farheap = length;
+ mmi->mainmem = mmi->nearheap + mmi->farheap;
+
+
+//
+// detect EMS and allocate up to 64K at page frame
+//
+ mmi->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(mm); // allocate space
+printf("EMS2\t"); printf("segstart=%x\t", segstart); printf("mm->EMSpageframe=%x\n", mm->EMSpageframe); //bug
+ MML_UseSpace(mm->EMSpageframe,mm->EMSpagesmapped*0x400, mm);
+//printf("EMS3\n");
+ MM_MapEMS(mm); // map in used pages
+//printf("EMS4\n");
+ mmi->EMSmem = mm->EMSpagesmapped*0x4000l;
+ }
+
+//
+// detect XMS and get upper memory blocks
+//
+emsskip:
+ mmi->XMSmem = 0;
+ for(i = 1;i < __argc;i++)
+ {
+ if( US_CheckParm(__argv[i],ParmStringsexmm) == 0)
+ goto xmsskip; // param NOXMS
+ }
+
+ if(MML_CheckForXMS(mm))
+ {
+//printf("XMS!\n");
+ MML_SetupXMS(mm, mmi); // allocate as many UMBs as possible
+ }
+
+//
+// allocate the misc buffer
+//
+xmsskip:
+ mm->mmrover = mm->mmhead; // start looking for space after low block
+
+ MM_GetPtr(&(mm->bufferseg),BUFFERSIZE, mm, mmi);
+}
+
+//==========================================================================
+
+/*
+====================
+=
+= MM_Shutdown
+=
+= Frees all conventional, EMS, and XMS allocated
+=
+====================
+*/
+
+void MM_Shutdown(mminfo_t *mm)
+{
+ if(!(mm->mmstarted))
+ return;
+
_ffree(mm->farheap);
- printf("far freed\n");\r
+ printf("far freed\n");
free(mm->nearheap);
- printf("near freed\n");\r
+ printf("near freed\n");
//hfree(mm->hugeheap);
- //printf("huge freed\n");\r
+ //printf("huge freed\n");
MML_ShutdownEMS(mm);
- printf("EMS freed\n");\r
+ printf("EMS freed\n");
MML_ShutdownXMS(mm);
- printf("XMS freed\n");\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,dword size, mminfo_t *mm, mminfotype *mmi)\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
- MM_GetNewBlock(mm); // fill in start and next after a spot is found\r
- mm->mmnew->length = needed;\r
- mm->mmnew->useptr = baseptr;\r
- mm->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 && mm->mmrover == mm->mmhead)\r
- search++;\r
-\r
- switch(search)\r
- {\r
- case 0:\r
- lastscan = mm->mmrover;\r
- scan = mm->mmrover->next;\r
- endscan = NULL;\r
- break;\r
- case 1:\r
- lastscan = mm->mmhead;\r
- scan = mm->mmhead->next;\r
- endscan = mm->mmrover;\r
- break;\r
- case 2:\r
- MM_SortMem(mm);\r
- lastscan = mm->mmhead;\r
- scan = mm->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 = mm->mmnew;\r
- mm->mmnew->start = *(unsigned *)baseptr = startseg;\r
- mm->mmnew->next = scan;\r
- while(purge != scan)\r
- { // free the purgable block\r
- next = purge->next;\r
- MM_FreeBlock(purge, mm);\r
- purge = next; // purge another if not at scan\r
- }\r
- mm->mmrover = mm->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 (mm->bombonerror)\r
- printf(OUT_OF_MEM_MSG,(size-mmi->nearheap));\r
- else\r
- mm->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, mminfo_t *mm)\r
-{\r
- mmblocktype far *scan,far *last;\r
-\r
- last = mm->mmhead;\r
- scan = last->next;\r
-\r
- if(baseptr == mm->mmrover->useptr) // removed the last allocated block\r
- mm->mmrover = mm->mmhead;\r
-\r
- while(scan->useptr != baseptr && scan)\r
- {\r
- last = scan;\r
- scan = scan->next;\r
- }\r
-\r
- if(!scan)\r
- {\r
- printf("MM_FreePtr: Block not found!");\r
- return;\r
- }\r
-\r
- last->next = scan->next;\r
-\r
- MM_FreeBlock(scan, mm);\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, mminfo_t *mm)\r
-{\r
- mmblocktype far *start;\r
-\r
- start = mm->mmrover;\r
-\r
- do\r
- {\r
- if(mm->mmrover->useptr == baseptr)\r
- break;\r
-\r
- mm->mmrover = mm->mmrover->next;\r
-\r
- if(!mm->mmrover)\r
- mm->mmrover = mm->mmhead;\r
- else if(mm->mmrover == start)\r
- {\r
- printf("MM_SetPurge: Block not found!");\r
- return;\r
- }\r
-\r
- } while(1);\r
-\r
- mm->mmrover->attributes &= ~PURGEBITS;\r
- mm->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, mminfo_t *mm)\r
-{\r
- mmblocktype far *start;\r
-\r
- start = mm->mmrover;\r
-\r
- do\r
- {\r
- if(mm->mmrover->useptr == baseptr)\r
- break;\r
-\r
- mm->mmrover = mm->mmrover->next;\r
-\r
- if(!mm->mmrover)\r
- mm->mmrover = mm->mmhead;\r
- else if(mm->mmrover == start)\r
- {\r
- printf("MM_SetLock: Block not found!");\r
- return;\r
- }\r
-\r
- } while(1);\r
-\r
- mm->mmrover->attributes &= ~LOCKBIT;\r
- mm->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(mminfo_t *mm)\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 = mm->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
- MM_FreeBlock(scan, mm);\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
- mm->mmrover = mm->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
-//****#if 0\r
-/*\r
-=====================\r
-=\r
-= MM_ShowMemory\r
-=\r
-=====================\r
-*/\r
-\r
-void MM_ShowMemory(mminfo_t *mm)\r
-{\r
- mmblocktype far *scan;\r
- unsigned color,temp;//, i;\r
- long end,owner;\r
- char scratch[80],str[10];\r
-\r
-//**** VW_SetDefaultColors();\r
-//**** VW_SetLineWidth(40);\r
-//++++mh temp = bufferofs;\r
-//++++mh bufferofs = 0;\r
-//**** VW_SetScreen (0,0);\r
-\r
- scan = mm->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
- {\r
- printf("MM_ShowMemory: Memory block order currupted!");\r
- return;\r
- }\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
-printf("Location:");\r
-printf("%Fp\t", scan->start);\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
-fprintf(stdout, "%s", scratch);\r
-//****#endif\r
-\r
- scan = scan->next;\r
- }\r
-\r
-//CA_CloseDebug ();\r
-\r
-//++++mh IN_Ack();\r
-//**** VW_SetLineWidth(64);\r
-//++++mh bufferofs = temp;\r
-}\r
-//****#endif\r
-\r
-//==========================================================================\r
-\r
-\r
-/*\r
-======================\r
-=\r
-= MM_UnusedMemory\r
-=\r
-= Returns the total free space without purging\r
-=\r
-======================\r
-*/\r
-\r
-dword MM_UnusedMemory(mminfo_t *mm)\r
-{\r
- unsigned free;\r
- mmblocktype far *scan;\r
-\r
- free = 0;\r
- scan = mm->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
-// return free;\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
-dword MM_TotalFree(mminfo_t *mm)\r
-{\r
- unsigned free;\r
- mmblocktype far *scan;\r
-\r
- free = 0;\r
- scan = mm->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
-// return free;\r
-}\r
-\r
-//==========================================================================\r
-\r
-/*\r
-=====================\r
-=\r
-= MM_Report\r
-=\r
-=====================\r
-*/\r
-\r
-void MM_Report(mminfo_t *mm, mminfotype *mmi)\r
-{\r
- printf("EMM %x available\n", mm->EMSVer);\r
- printf("totalEMSpages=%u\n", mm->totalEMSpages);\r
- printf("freeEMSpages=%u\n", mm->freeEMSpages);\r
- printf("EMSpageframe=%Fp\n", mm->EMSpageframe);\r
- printf("near=%lu\n", mmi->nearheap);\r
- printf("far=%lu\n", mmi->farheap);\r
- printf("EMSmem=%lu\n", mmi->EMSmem);\r
- printf("XMSmem=%lu\n", mmi->XMSmem);\r
- printf("mainmem=%lu\n", mmi->mainmem);\r
- printf("UnusedMemory=%lu\n", MM_UnusedMemory(mm));\r
- printf("TotalFree=%lu\n", MM_TotalFree(mm));\r
-// printf("\n");\r
-// printf("UnusedMemory=%lu kb\n", MM_UnusedMemory()/10248);\r
-// printf("TotalFree=%lu kb\n", MM_TotalFree()/10248);\r
-}\r
-\r
-//==========================================================================\r
-\r
-/*\r
-=====================\r
-=\r
-= MM_EMSVer\r
-=\r
-=====================\r
-\r
-\r
-int MM_EMSVer(void)\r
-{\r
- int EMSver;\r
- __asm\r
- {\r
- mov ah,EMS_VERSION\r
- int EMS_INT\r
- mov EMSver,ax\r
- }\r
- return(EMSver);\r
-}*/\r
-\r
-//==========================================================================\r
-\r
-/*\r
-=====================\r
-=\r
-= MM_BombOnError\r
-=\r
-=====================\r
-*/\r
-\r
-void MM_BombOnError(boolean bomb, mminfo_t *mm)\r
-{\r
- mm->bombonerror = bomb;\r
-}\r
+ printf("XMS freed\n");
+}
+
+//==========================================================================
+
+/*
+====================
+=
+= MM_GetPtr
+=
+= Allocates an unlocked, unpurgable block
+=
+====================
+*/
+
+void MM_GetPtr(memptr *baseptr,dword size, mminfo_t *mm, mminfotype *mmi)
+{
+ 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
+
+ MM_GetNewBlock(mm); // fill in start and next after a spot is found
+ mm->mmnew->length = needed;
+ mm->mmnew->useptr = baseptr;
+ mm->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 && mm->mmrover == mm->mmhead)
+ search++;
+
+ switch(search)
+ {
+ case 0:
+ lastscan = mm->mmrover;
+ scan = mm->mmrover->next;
+ endscan = NULL;
+ break;
+ case 1:
+ lastscan = mm->mmhead;
+ scan = mm->mmhead->next;
+ endscan = mm->mmrover;
+ break;
+ case 2:
+ MM_SortMem(mm);
+ lastscan = mm->mmhead;
+ scan = mm->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 = mm->mmnew;
+ mm->mmnew->start = *(unsigned *)baseptr = startseg;
+ mm->mmnew->next = scan;
+ while(purge != scan)
+ { // free the purgable block
+ next = purge->next;
+ MM_FreeBlock(purge, mm);
+ purge = next; // purge another if not at scan
+ }
+ mm->mmrover = mm->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 (mm->bombonerror)
+ printf(OUT_OF_MEM_MSG,(size-mmi->nearheap));
+ else
+ mm->mmerror = true;
+}
+
+//==========================================================================
+
+/*
+====================
+=
+= MM_FreePtr
+=
+= Allocates an unlocked, unpurgable block
+=
+====================
+*/
+
+void MM_FreePtr(memptr *baseptr, mminfo_t *mm)
+{
+ mmblocktype far *scan,far *last;
+
+ last = mm->mmhead;
+ scan = last->next;
+
+ if(baseptr == mm->mmrover->useptr) // removed the last allocated block
+ mm->mmrover = mm->mmhead;
+
+ while(scan->useptr != baseptr && scan)
+ {
+ last = scan;
+ scan = scan->next;
+ }
+
+ if(!scan)
+ {
+ printf("MM_FreePtr: Block not found!");
+ return;
+ }
+
+ last->next = scan->next;
+
+ MM_FreeBlock(scan, mm);
+}
+//==========================================================================
+
+/*
+=====================
+=
+= MM_SetPurge
+=
+= Sets the purge level for a block (locked blocks cannot be made purgable)
+=
+=====================
+*/
+
+void MM_SetPurge(memptr *baseptr, int purge, mminfo_t *mm)
+{
+ mmblocktype far *start;
+
+ start = mm->mmrover;
+
+ do
+ {
+ if(mm->mmrover->useptr == baseptr)
+ break;
+
+ mm->mmrover = mm->mmrover->next;
+
+ if(!mm->mmrover)
+ mm->mmrover = mm->mmhead;
+ else if(mm->mmrover == start)
+ {
+ printf("MM_SetPurge: Block not found!");
+ return;
+ }
+
+ } while(1);
+
+ mm->mmrover->attributes &= ~PURGEBITS;
+ mm->mmrover->attributes |= purge;
+}
+
+//==========================================================================
+
+/*
+=====================
+=
+= MM_SetLock
+=
+= Locks / unlocks the block
+=
+=====================
+*/
+
+void MM_SetLock(memptr *baseptr, boolean locked, mminfo_t *mm)
+{
+ mmblocktype far *start;
+
+ start = mm->mmrover;
+
+ do
+ {
+ if(mm->mmrover->useptr == baseptr)
+ break;
+
+ mm->mmrover = mm->mmrover->next;
+
+ if(!mm->mmrover)
+ mm->mmrover = mm->mmhead;
+ else if(mm->mmrover == start)
+ {
+ printf("MM_SetLock: Block not found!");
+ return;
+ }
+
+ } while(1);
+
+ mm->mmrover->attributes &= ~LOCKBIT;
+ mm->mmrover->attributes |= locked*LOCKBIT;
+}
+
+//==========================================================================
+
+/*
+=====================
+=
+= MM_SortMem
+=
+= Throws out all purgable stuff and compresses movable blocks
+=
+=====================
+*/
+
+void MM_SortMem(mminfo_t *mm)
+{
+ 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 = mm->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;
+ MM_FreeBlock(scan, mm);
+ 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
+ }
+
+ mm->mmrover = mm->mmhead;
+
+ if(aftersort)
+ aftersort();
+
+// VW_ColorBorder (oldborder);
+
+/*++++ if(playing)
+ MM_SetLock(&(memptr)audiosegs[playing],false);*/
+}
+
+
+//==========================================================================
+
+//****#if 0
+/*
+=====================
+=
+= MM_ShowMemory
+=
+=====================
+*/
+
+void MM_ShowMemory(mminfo_t *mm)
+{
+ 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 = mm->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("%x\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(mminfo_t *mm)
+{
+ unsigned free;
+ mmblocktype far *scan;
+
+ free = 0;
+ scan = mm->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(mminfo_t *mm)
+{
+ unsigned free;
+ mmblocktype far *scan;
+
+ free = 0;
+ scan = mm->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(mminfo_t *mm, mminfotype *mmi)
+{
+ printf("EMM %x available\n", mm->EMSVer);
+ printf("totalEMSpages=%u\n", mm->totalEMSpages);
+ printf("freeEMSpages=%u\n", mm->freeEMSpages);
+ printf("EMSpageframe=%Fp\n", mm->EMSpageframe);
+ printf("near=%lu\n", mmi->nearheap);
+ printf("far=%lu\n", mmi->farheap);
+ printf("EMSmem=%lu\n", mmi->EMSmem);
+ printf("XMSmem=%lu\n", mmi->XMSmem);
+ printf("mainmem=%lu\n", mmi->mainmem);
+ printf("UnusedMemory=%lu\n", MM_UnusedMemory(mm));
+ printf("TotalFree=%lu\n", MM_TotalFree(mm));
+// 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_t *mm)
+{
+ mm->bombonerror = bomb;
+}
void MM_GetNewBlock(mminfo_t *mm)
{
projects / 16.git / commitdiff