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authorTim Angus <tim@ngus.net>2005-12-10 03:23:37 +0000
committerTim Angus <tim@ngus.net>2005-12-10 03:23:37 +0000
commitbf23ecf17f432cf8e47302ef7464612c17be9bbe (patch)
tree6e3d28ecaa038199d6ba63830e81f05270b199c3 /mod/src/game/g_mem.c
parent22f322884cf7715c01500ef0b4579b87b1cb1973 (diff)
* Move the game source from mod/src/ to src/
Diffstat (limited to 'mod/src/game/g_mem.c')
-rw-r--r--mod/src/game/g_mem.c201
1 files changed, 0 insertions, 201 deletions
diff --git a/mod/src/game/g_mem.c b/mod/src/game/g_mem.c
deleted file mode 100644
index 2f3ed5c7..00000000
--- a/mod/src/game/g_mem.c
+++ /dev/null
@@ -1,201 +0,0 @@
-// Copyright (C) 1999-2000 Id Software, Inc.
-//
-//
-// g_mem.c
-//
-// Golliwog: All rewritten to allow deallocation
-
-
-#include "g_local.h"
-
-#define POOLSIZE (256 * 1024)
-#define FREEMEMCOOKIE ((int)0xDEADBE3F) // Any unlikely to be used value
-#define ROUNDBITS 31 // Round to 32 bytes
-
-struct freememnode
-{
- // Size of ROUNDBITS
- int cookie, size; // Size includes node (obviously)
- struct freememnode *prev, *next;
-};
-
-static char memoryPool[POOLSIZE];
-static struct freememnode *freehead;
-static int freemem;
-
-void *G_Alloc( int size )
-{
- // Find a free block and allocate.
- // Does two passes, attempts to fill same-sized free slot first.
-
- struct freememnode *fmn, *prev, *next, *smallest;
- int allocsize, smallestsize;
- char *endptr;
- int *ptr;
-
- allocsize = ( size + sizeof(int) + ROUNDBITS ) & ~ROUNDBITS; // Round to 32-byte boundary
- ptr = NULL;
-
- smallest = NULL;
- smallestsize = POOLSIZE + 1; // Guaranteed not to miss any slots :)
- for( fmn = freehead; fmn; fmn = fmn->next )
- {
- if( fmn->cookie != FREEMEMCOOKIE )
- G_Error( "G_Alloc: Memory corruption detected!\n" );
-
- if( fmn->size >= allocsize )
- {
- // We've got a block
- if( fmn->size == allocsize )
- {
- // Same size, just remove
-
- prev = fmn->prev;
- next = fmn->next;
- if( prev )
- prev->next = next; // Point previous node to next
- if( next )
- next->prev = prev; // Point next node to previous
- if( fmn == freehead )
- freehead = next; // Set head pointer to next
- ptr = (int *) fmn;
- break; // Stop the loop, this is fine
- }
- else
- {
- // Keep track of the smallest free slot
- if( fmn->size < smallestsize )
- {
- smallest = fmn;
- smallestsize = fmn->size;
- }
- }
- }
- }
-
- if( !ptr && smallest )
- {
- // We found a slot big enough
- smallest->size -= allocsize;
- endptr = (char *) smallest + smallest->size;
- ptr = (int *) endptr;
- }
-
- if( ptr )
- {
- freemem -= allocsize;
- if( g_debugAlloc.integer )
- G_Printf( "G_Alloc of %i bytes (%i left)\n", allocsize, freemem );
- memset( ptr, 0, allocsize );
- *ptr++ = allocsize; // Store a copy of size for deallocation
- return( (void *) ptr );
- }
-
- G_Error( "G_Alloc: failed on allocation of %i bytes\n", size );
- return( NULL );
-}
-
-void G_Free( void *ptr )
-{
- // Release allocated memory, add it to the free list.
-
- struct freememnode *fmn;
- char *freeend;
- int *freeptr;
-
- freeptr = ptr;
- freeptr--;
-
- freemem += *freeptr;
- if( g_debugAlloc.integer )
- G_Printf( "G_Free of %i bytes (%i left)\n", *freeptr, freemem );
-
- for( fmn = freehead; fmn; fmn = fmn->next )
- {
- freeend = ((char *) fmn) + fmn->size;
- if( freeend == (char *) freeptr )
- {
- // Released block can be merged to an existing node
-
- fmn->size += *freeptr; // Add size of node.
- return;
- }
- }
- // No merging, add to head of list
-
- fmn = (struct freememnode *) freeptr;
- fmn->size = *freeptr; // Set this first to avoid corrupting *freeptr
- fmn->cookie = FREEMEMCOOKIE;
- fmn->prev = NULL;
- fmn->next = freehead;
- freehead->prev = fmn;
- freehead = fmn;
-}
-
-void G_InitMemory( void )
-{
- // Set up the initial node
-
- freehead = (struct freememnode *)memoryPool;
- freehead->cookie = FREEMEMCOOKIE;
- freehead->size = POOLSIZE;
- freehead->next = NULL;
- freehead->prev = NULL;
- freemem = sizeof( memoryPool );
-}
-
-void G_DefragmentMemory( void )
-{
- // If there's a frenzy of deallocation and we want to
- // allocate something big, this is useful. Otherwise...
- // not much use.
-
- struct freememnode *startfmn, *endfmn, *fmn;
-
- for( startfmn = freehead; startfmn; )
- {
- endfmn = (struct freememnode *)(((char *) startfmn) + startfmn->size);
- for( fmn = freehead; fmn; )
- {
- if( fmn->cookie != FREEMEMCOOKIE )
- G_Error( "G_DefragmentMemory: Memory corruption detected!\n" );
-
- if( fmn == endfmn )
- {
- // We can add fmn onto startfmn.
-
- if( fmn->prev )
- fmn->prev->next = fmn->next;
- if( fmn->next )
- {
- if( !(fmn->next->prev = fmn->prev) )
- freehead = fmn->next; // We're removing the head node
- }
- startfmn->size += fmn->size;
- memset( fmn, 0, sizeof(struct freememnode) ); // A redundant call, really.
-
- startfmn = freehead;
- endfmn = fmn = NULL; // Break out of current loop
- }
- else
- fmn = fmn->next;
- }
-
- if( endfmn )
- startfmn = startfmn->next; // endfmn acts as a 'restart' flag here
- }
-}
-
-void Svcmd_GameMem_f( void )
-{
- // Give a breakdown of memory
-
- struct freememnode *fmn;
-
- G_Printf( "Game memory status: %i out of %i bytes allocated\n", POOLSIZE - freemem, POOLSIZE );
-
- for( fmn = freehead; fmn; fmn = fmn->next )
- G_Printf( " %dd: %d bytes free.\n", fmn, fmn->size );
- G_Printf( "Status complete.\n" );
-}
-