The DOOM sources as originally released on December 23, 1997

linuxdoom-1.10/z_zone.h

@@ -0,0 +1,86 @@
+// Emacs style mode select   -*- C++ -*- 
+//-----------------------------------------------------------------------------
+//
+// $Id:$
+//
+// Copyright (C) 1993-1996 by id Software, Inc.
+//
+// This source is available for distribution and/or modification
+// only under the terms of the DOOM Source Code License as
+// published by id Software. All rights reserved.
+//
+// The source is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
+// for more details.
+//
+// DESCRIPTION:
+//      Zone Memory Allocation, perhaps NeXT ObjectiveC inspired.
+//	Remark: this was the only stuff that, according
+//	 to John Carmack, might have been useful for
+//	 Quake.
+//
+//---------------------------------------------------------------------
+
+
+
+#ifndef __Z_ZONE__
+#define __Z_ZONE__
+
+#include <stdio.h>
+
+//
+// ZONE MEMORY
+// PU - purge tags.
+// Tags < 100 are not overwritten until freed.
+#define PU_STATIC		1	// static entire execution time
+#define PU_SOUND		2	// static while playing
+#define PU_MUSIC		3	// static while playing
+#define PU_DAVE		4	// anything else Dave wants static
+#define PU_LEVEL		50	// static until level exited
+#define PU_LEVSPEC		51      // a special thinker in a level
+// Tags >= 100 are purgable whenever needed.
+#define PU_PURGELEVEL	100
+#define PU_CACHE		101
+
+
+void	Z_Init (void);
+void*	Z_Malloc (int size, int tag, void *ptr);
+void    Z_Free (void *ptr);
+void    Z_FreeTags (int lowtag, int hightag);
+void    Z_DumpHeap (int lowtag, int hightag);
+void    Z_FileDumpHeap (FILE *f);
+void    Z_CheckHeap (void);
+void    Z_ChangeTag2 (void *ptr, int tag);
+int     Z_FreeMemory (void);
+
+
+typedef struct memblock_s
+{
+    int			size;	// including the header and possibly tiny fragments
+    void**		user;	// NULL if a free block
+    int			tag;	// purgelevel
+    int			id;	// should be ZONEID
+    struct memblock_s*	next;
+    struct memblock_s*	prev;
+} memblock_t;
+
+//
+// This is used to get the local FILE:LINE info from CPP
+// prior to really call the function in question.
+//
+#define Z_ChangeTag(p,t) \
+{ \
+      if (( (memblock_t *)( (byte *)(p) - sizeof(memblock_t)))->id!=0x1d4a11) \
+	  I_Error("Z_CT at "__FILE__":%i",__LINE__); \
+	  Z_ChangeTag2(p,t); \
+};
+
+
+
+#endif
+//-----------------------------------------------------------------------------
+//
+// $Log:$
+//
+//-----------------------------------------------------------------------------