/* zone.c (description) Copyright (C) 1996-1997 Id Software, Inc. 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: Free Software Foundation, Inc. 59 Temple Place - Suite 330 Boston, MA 02111-1307, USA $Id$ */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #ifdef HAVE_STRING_H # include #endif #ifdef HAVE_STRINGS_H # include #endif #include #include "cmd.h" #include "console.h" #include "qargs.h" #include "sys.h" #include "zone.h" #define DYNAMIC_SIZE 0x20000 #define ZONEID 0x1d4a11 #define HUNK_SENTINAL 0x1df001ed #define MINFRAGMENT 64 void Cache_FreeLow (int new_low_hunk); void Cache_FreeHigh (int new_high_hunk); /* The zone calls are pretty much only used for small strings and structures, all big things are allocated on the hunk. */ //============================================================================ typedef struct { int sentinal; int size; // including sizeof(hunk_t), -1 = not // allocated char name[8]; } hunk_t; byte *hunk_base; int hunk_size; int hunk_low_used; int hunk_high_used; qboolean hunk_tempactive; int hunk_tempmark; void R_FreeTextures (void); /* Hunk_Check Run consistancy and sentinal trahing checks */ void Hunk_Check (void) { hunk_t *h; for (h = (hunk_t *) hunk_base; (byte *) h != hunk_base + hunk_low_used;) { if (h->sentinal != HUNK_SENTINAL) Sys_Error ("Hunk_Check: trashed sentinal"); if (h->size < 16 || h->size + (byte *) h - hunk_base > hunk_size) Sys_Error ("Hunk_Check: bad size"); h = (hunk_t *) ((byte *) h + h->size); } } /* Hunk_Print If "all" is specified, every single allocation is printed. Otherwise, allocations with the same name will be totaled up before printing. */ void Hunk_Print (qboolean all) { hunk_t *h, *next, *endlow, *starthigh, *endhigh; int count, sum; int totalblocks; char name[9]; name[8] = 0; count = 0; sum = 0; totalblocks = 0; h = (hunk_t *) hunk_base; endlow = (hunk_t *) (hunk_base + hunk_low_used); starthigh = (hunk_t *) (hunk_base + hunk_size - hunk_high_used); endhigh = (hunk_t *) (hunk_base + hunk_size); Con_Printf (" :%8i total hunk size\n", hunk_size); Con_Printf ("-------------------------\n"); while (1) { // // skip to the high hunk if done with low hunk // if (h == endlow) { Con_Printf ("-------------------------\n"); Con_Printf (" :%8i REMAINING\n", hunk_size - hunk_low_used - hunk_high_used); Con_Printf ("-------------------------\n"); h = starthigh; } // // if totally done, break // if (h == endhigh) break; // // run consistancy checks // if (h->sentinal != HUNK_SENTINAL) Sys_Error ("Hunk_Check: trahsed sentinal"); if (h->size < 16 || h->size + (byte *) h - hunk_base > hunk_size) Sys_Error ("Hunk_Check: bad size"); next = (hunk_t *) ((byte *) h + h->size); count++; totalblocks++; sum += h->size; // // print the single block // memcpy (name, h->name, 8); if (all) Con_Printf ("%8p :%8i %8s\n", h, h->size, name); // // print the total // if (next == endlow || next == endhigh || strncmp (h->name, next->name, 8)) { if (!all) Con_Printf (" :%8i %8s (TOTAL)\n", sum, name); count = 0; sum = 0; } h = next; } Con_Printf ("-------------------------\n"); Con_Printf ("%8i total blocks\n", totalblocks); } /* Hunk_AllocName */ void * Hunk_AllocName (int size, char *name) { hunk_t *h; #ifdef PARANOID Hunk_Check (); #endif if (size < 0) Sys_Error ("Hunk_Alloc: bad size: %i", size); size = sizeof (hunk_t) + ((size + 15) & ~15); if (hunk_size - hunk_low_used - hunk_high_used < size) // Sys_Error ("Hunk_Alloc: failed on %i bytes",size); #ifdef _WIN32 Sys_Error ("Not enough RAM allocated. Try starting using \"-heapsize 16000\" on the %s command line.", PROGRAM); #else Sys_Error ("Not enough RAM allocated. Try starting using \"-mem 16\" on the %s command line.", PROGRAM); #endif h = (hunk_t *) (hunk_base + hunk_low_used); hunk_low_used += size; Cache_FreeLow (hunk_low_used); memset (h, 0, size); h->size = size; h->sentinal = HUNK_SENTINAL; strncpy (h->name, name, 8); return (void *) (h + 1); } /* Hunk_Alloc */ void * Hunk_Alloc (int size) { return Hunk_AllocName (size, "unknown"); } int Hunk_LowMark (void) { return hunk_low_used; } void Hunk_FreeToLowMark (int mark) { if (mark < 0 || mark > hunk_low_used) Sys_Error ("Hunk_FreeToLowMark: bad mark %i", mark); memset (hunk_base + mark, 0, hunk_low_used - mark); hunk_low_used = mark; } int Hunk_HighMark (void) { if (hunk_tempactive) { hunk_tempactive = false; Hunk_FreeToHighMark (hunk_tempmark); } return hunk_high_used; } void Hunk_FreeToHighMark (int mark) { if (hunk_tempactive) { hunk_tempactive = false; Hunk_FreeToHighMark (hunk_tempmark); } if (mark < 0 || mark > hunk_high_used) Sys_Error ("Hunk_FreeToHighMark: bad mark %i", mark); memset (hunk_base + hunk_size - hunk_high_used, 0, hunk_high_used - mark); hunk_high_used = mark; } /* Hunk_HighAllocName */ void * Hunk_HighAllocName (int size, char *name) { hunk_t *h; if (size < 0) Sys_Error ("Hunk_HighAllocName: bad size: %i", size); if (hunk_tempactive) { Hunk_FreeToHighMark (hunk_tempmark); hunk_tempactive = false; } #ifdef PARANOID Hunk_Check (); #endif size = sizeof (hunk_t) + ((size + 15) & ~15); if (hunk_size - hunk_low_used - hunk_high_used < size) { Con_Printf ("Hunk_HighAlloc: failed on %i bytes\n", size); return NULL; } hunk_high_used += size; Cache_FreeHigh (hunk_high_used); h = (hunk_t *) (hunk_base + hunk_size - hunk_high_used); memset (h, 0, size); h->size = size; h->sentinal = HUNK_SENTINAL; strncpy (h->name, name, 8); return (void *) (h + 1); } /* Hunk_TempAlloc Return space from the top of the hunk */ void * Hunk_TempAlloc (int size) { void *buf; size = (size + 15) & ~15; if (hunk_tempactive) { Hunk_FreeToHighMark (hunk_tempmark); hunk_tempactive = false; } hunk_tempmark = Hunk_HighMark (); buf = Hunk_HighAllocName (size, "temp"); hunk_tempactive = true; return buf; } /* CACHE MEMORY */ typedef struct cache_system_s { int size; // including this header cache_user_t *user; char name[16]; struct cache_system_s *prev, *next; struct cache_system_s *lru_prev, *lru_next; // for LRU flushing } cache_system_t; cache_system_t *Cache_TryAlloc (int size, qboolean nobottom); cache_system_t cache_head; /* Cache_Move */ void Cache_Move (cache_system_t * c) { cache_system_t *new; // we are clearing up space at the bottom, so only allocate it late new = Cache_TryAlloc (c->size, true); if (new) { // Con_Printf ("cache_move ok\n"); memcpy (new + 1, c + 1, c->size - sizeof (cache_system_t)); new->user = c->user; memcpy (new->name, c->name, sizeof (new->name)); Cache_Free (c->user); new->user->data = (void *) (new + 1); } else { // Con_Printf ("cache_move failed\n"); Cache_Free (c->user); // tough luck... } } /* Cache_FreeLow Throw things out until the hunk can be expanded to the given point */ void Cache_FreeLow (int new_low_hunk) { cache_system_t *c; while (1) { c = cache_head.next; if (c == &cache_head) return; // nothing in cache at all if ((byte *) c >= hunk_base + new_low_hunk) return; // there is space to grow the hunk Cache_Move (c); // reclaim the space } } /* Cache_FreeHigh Throw things out until the hunk can be expanded to the given point */ void Cache_FreeHigh (int new_high_hunk) { cache_system_t *c, *prev; prev = NULL; while (1) { c = cache_head.prev; if (c == &cache_head) return; // nothing in cache at all if ((byte *) c + c->size <= hunk_base + hunk_size - new_high_hunk) return; // there is space to grow the hunk if (c == prev) Cache_Free (c->user); // didn't move out of the way else { Cache_Move (c); // try to move it prev = c; } } } void Cache_UnlinkLRU (cache_system_t * cs) { if (!cs->lru_next || !cs->lru_prev) Sys_Error ("Cache_UnlinkLRU: NULL link"); cs->lru_next->lru_prev = cs->lru_prev; cs->lru_prev->lru_next = cs->lru_next; cs->lru_prev = cs->lru_next = NULL; } void Cache_MakeLRU (cache_system_t * cs) { if (cs->lru_next || cs->lru_prev) Sys_Error ("Cache_MakeLRU: active link"); cache_head.lru_next->lru_prev = cs; cs->lru_next = cache_head.lru_next; cs->lru_prev = &cache_head; cache_head.lru_next = cs; } /* Cache_TryAlloc Looks for a free block of memory between the high and low hunk marks Size should already include the header and padding */ cache_system_t * Cache_TryAlloc (int size, qboolean nobottom) { cache_system_t *cs, *new; // is the cache completely empty? if (!nobottom && cache_head.prev == &cache_head) { if (hunk_size - hunk_high_used - hunk_low_used < size) Sys_Error ("Cache_TryAlloc: %i is greater then free hunk", size); new = (cache_system_t *) (hunk_base + hunk_low_used); memset (new, 0, sizeof (*new)); new->size = size; cache_head.prev = cache_head.next = new; new->prev = new->next = &cache_head; Cache_MakeLRU (new); return new; } // search from the bottom up for space new = (cache_system_t *) (hunk_base + hunk_low_used); cs = cache_head.next; do { if (!nobottom || cs != cache_head.next) { if ((byte *) cs - (byte *) new >= size) { // found space memset (new, 0, sizeof (*new)); new->size = size; new->next = cs; new->prev = cs->prev; cs->prev->next = new; cs->prev = new; Cache_MakeLRU (new); return new; } } // continue looking new = (cache_system_t *) ((byte *) cs + cs->size); cs = cs->next; } while (cs != &cache_head); // try to allocate one at the very end if (hunk_base + hunk_size - hunk_high_used - (byte *) new >= size) { memset (new, 0, sizeof (*new)); new->size = size; new->next = &cache_head; new->prev = cache_head.prev; cache_head.prev->next = new; cache_head.prev = new; Cache_MakeLRU (new); return new; } return NULL; // couldn't allocate } /* Cache_Flush Throw everything out, so new data will be demand cached */ void Cache_Flush (void) { while (cache_head.next != &cache_head) Cache_Free (cache_head.next->user); // reclaim the space } /* Cache_Print */ void Cache_Print (void) { cache_system_t *cd; for (cd = cache_head.next; cd != &cache_head; cd = cd->next) { Con_Printf ("%8i : %s\n", cd->size, cd->name); } } /* Cache_Report */ void Cache_Report (void) { Con_DPrintf ("%4.1f megabyte data cache\n", (hunk_size - hunk_high_used - hunk_low_used) / (float) (1024 * 1024)); } /* Cache_Compact */ void Cache_Compact (void) { } /* Cache_Init */ void Cache_Init (void) { cache_head.next = cache_head.prev = &cache_head; cache_head.lru_next = cache_head.lru_prev = &cache_head; Cmd_AddCommand ("flush", Cache_Flush, "Clears the current game cache"); } /* Cache_Free Frees the memory and removes it from the LRU list */ void Cache_Free (cache_user_t *c) { cache_system_t *cs; if (!c->data) Sys_Error ("Cache_Free: not allocated"); cs = ((cache_system_t *) c->data) - 1; cs->prev->next = cs->next; cs->next->prev = cs->prev; cs->next = cs->prev = NULL; c->data = NULL; Cache_UnlinkLRU (cs); } /* Cache_Check */ void * Cache_Check (cache_user_t *c) { cache_system_t *cs; if (!c->data) return NULL; cs = ((cache_system_t *) c->data) - 1; // move to head of LRU Cache_UnlinkLRU (cs); Cache_MakeLRU (cs); return c->data; } /* Cache_Alloc */ void * Cache_Alloc (cache_user_t *c, int size, char *name) { cache_system_t *cs; if (c->data) Sys_Error ("Cache_Alloc: allready allocated"); if (size <= 0) Sys_Error ("Cache_Alloc: size %i", size); size = (size + sizeof (cache_system_t) + 15) & ~15; // find memory for it while (1) { cs = Cache_TryAlloc (size, false); if (cs) { strncpy (cs->name, name, sizeof (cs->name) - 1); c->data = (void *) (cs + 1); cs->user = c; break; } // free the least recently used cahedat if (cache_head.lru_prev == &cache_head) Sys_Error ("Cache_Alloc: out of memory"); // not enough memory at all Cache_Free (cache_head.lru_prev->user); } return Cache_Check (c); } //============================================================================ /* Memory_Init */ void Memory_Init (void *buf, int size) { hunk_base = buf; hunk_size = size; hunk_low_used = 0; hunk_high_used = 0; Cache_Init (); }