185 lines
6.4 KiB
C
185 lines
6.4 KiB
C
/*
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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memory allocation
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H_??? The hunk manages the entire memory block given to quake. It must be
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contiguous. Memory can be allocated from either the low or high end in a
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stack fashion. The only way memory is released is by resetting one of the
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pointers.
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Hunk allocations should be given a name, so the Hunk_Print () function
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can display usage.
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Hunk allocations are guaranteed to be 16 byte aligned.
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The video buffers are allocated high to avoid leaving a hole underneath
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server allocations when changing to a higher video mode.
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Z_??? Zone memory functions used for small, dynamic allocations like text
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strings from command input. There is only about 48K for it, allocated at
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the very bottom of the hunk.
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Cache_??? Cache memory is for objects that can be dynamically loaded and
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can usefully stay persistant between levels. The size of the cache
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fluctuates from level to level.
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To allocate a cachable object
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Temp_??? Temp memory is used for file loading and surface caching. The size
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of the cache memory is adjusted so that there is a minimum of 512k remaining
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for temp memory.
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------ Top of Memory -------
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high hunk allocations
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<--- high hunk reset point held by vid
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video buffer
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z buffer
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surface cache
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<--- high hunk used
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cachable memory
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<--- low hunk used
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client and server low hunk allocations
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<-- low hunk reset point held by host
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startup hunk allocations
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Zone block
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----- Bottom of Memory -----
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*/
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#if 0//defined(_DEBUG) && defined(__linux__) && !defined(ANDROID)
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#include <valgrind/memcheck.h>
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#else
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#define VALGRIND_MAKE_MEM_UNDEFINED(ptr,sz) //as an alternative to memzero..
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#define VALGRIND_MAKE_MEM_NOACCESS(ptr,sz)
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#define VALGRIND_MAKE_MEM_DEFINED_IF_ADDRESSABLE(ptr,sz) //undo VALGRIND_MAKE_MEM_UNDEFINED, to make sure we don't read past the end of buffers.
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#endif
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void Memory_Init (void);
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void Memory_DeInit(void);
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//Prefixes:
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//Z - just general 'zone' memory.
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//B - allocated memory is not zero-filled.
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//F - allocation can return NULL (otherwise sys_errors)
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//G - special set of functions with its own rules. Frees must not be mixed.
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//Tag - additional special set of functions with their own rules. Frees must not be mixed.
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void VARGS Z_Free (void *ptr);
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void *Z_Malloc (size_t size); // returns 0 filled memory
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void *ZF_Malloc (size_t size); // allowed to fail
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void *Z_MallocNamed (size_t size, char *file, int line); // returns 0 filled memory
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void *ZF_MallocNamed (size_t size, char *file, int line); // allowed to fail
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//#define Z_Malloc(x) Z_MallocNamed2(x, __FILE__, __LINE__ )
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void *Z_TagMalloc (size_t size, int tag);
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void VARGS Z_TagFree(void *ptr);
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void VARGS Z_FreeTags(int tag);
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qboolean ZF_ReallocElements(void **ptr, size_t *elements, size_t newelements, size_t elementsize); //returns false on error
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qboolean ZF_ReallocElementsNamed(void **ptr, size_t *elements, size_t newelements, size_t elementsize, const char *file, int line); //returns false on error
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#define Z_ReallocElements(ptr,elements,newelements,elementsize) do{if (!ZF_ReallocElements(ptr,elements,newelements,elementsize))Sys_Error("Z_ReallocElements failed (%s %i)\n", __FILE__, __LINE__);}while(0) //returns false on error
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//Big Zone: allowed to fail, doesn't clear. The expectation is a large file, rather than sensitive data structures.
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//(this is a nicer name for malloc)
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void *BZ_Malloc(size_t size);
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void *BZF_Malloc(size_t size);
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void *BZ_MallocNamed (size_t size, const char *file, int line); // returns 0 filled memory
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void *BZF_MallocNamed (size_t size, const char *file, int line); // allowed to fail
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void *BZ_Realloc(void *ptr, size_t size);
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void *BZ_ReallocNamed(void *data, size_t newsize, const char *file, int line);
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void *BZF_Realloc(void *data, size_t newsize);
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void *BZF_ReallocNamed(void *data, size_t newsize, const char *file, int line);
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void BZ_Free(void *ptr);
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//ctx should start off as void*ctx=NULL
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typedef struct zonegroup_s
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{
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void *first;
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int totalbytes; //combined size of all mallocs in this group
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} zonegroup_t;
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void *QDECL ZG_Malloc(zonegroup_t *ctx, size_t size);
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void *ZG_MallocNamed(zonegroup_t *ctx, size_t size, char *file, int line);
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void QDECL ZG_Free(zonegroup_t *ctx, void *ptr);
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void QDECL ZG_FreeGroup(zonegroup_t *ctx);
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#ifdef USE_MSVCRT_DEBUG
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#define BZ_Malloc(size) BZ_MallocNamed(size, __FILE__, __LINE__)
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#define Z_Malloc(size) Z_MallocNamed(size, __FILE__, __LINE__)
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#define BZ_Realloc(ptr, size) BZ_ReallocNamed(ptr, size, __FILE__, __LINE__)
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#define BZF_Malloc(size) BZF_MallocNamed(size, __FILE__, __LINE__)
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#define ZF_Malloc(size) ZF_MallocNamed(size, __FILE__, __LINE__)
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#define BZF_Realloc(ptr, size) BZF_ReallocNamed(ptr, size, __FILE__, __LINE__)
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#define ZG_Malloc(ctx, size) ZG_MallocNamed(ctx, size, __FILE__, __LINE__)
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#define ZF_ReallocElements(p,e,n,s) ZF_ReallocElementsNamed(p,e,n,s,__FILE__,__LINE__)
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#endif
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#define Z_StrDup(s) strcpy(Z_Malloc(strlen(s)+1), s)
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#define Z_StrDupPtr(v,s) do{Z_Free(*v),*(v) = strcpy(Z_Malloc(strlen(s)+1), s);}while(0)
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char *Z_StrDupf(const char *format, ...);
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void Z_StrCat(char **ptr, const char *append);
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void Z_StrCatLen(char **ptr, const char *append, size_t newlen); //still doesn't allow nulls, but src doesn't need null termination.
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/*
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void *Hunk_Alloc (int size); // returns 0 filled memory
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void *Hunk_AllocName (int size, char *name);
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*/
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void *Hunk_TempAlloc (size_t size);
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void *Hunk_TempAllocMore (size_t size); //Don't clear old temp
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/*
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typedef struct cache_user_s
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{
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void *data;
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qboolean fake;
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} cache_user_t;
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*/
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void Cache_Flush (void);
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/*
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void *Cache_Check (cache_user_t *c);
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// returns the cached data, and moves to the head of the LRU list
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// if present, otherwise returns NULL
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void Cache_Free (cache_user_t *c);
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void *Cache_Alloc (cache_user_t *c, int size, char *name);
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// Returns NULL if all purgable data was tossed and there still
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// wasn't enough room.
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void Cache_Report (void);
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*/
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