922ec7f318
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5174 a95241bf-73f2-0310-859d-f6bbb57e9c96
76 lines
2.3 KiB
C
76 lines
2.3 KiB
C
/*------------------------------------------------------------------------------
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// Copyright (c) 2001-2002, OpenBeOS
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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// File Name: areafunc.c
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// Author: DarkWyrm <bpmagic@columbus.rr.com>
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// Description: C functions for interfacing with the BGET pool allocator
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//
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//------------------------------------------------------------------------------*/
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#include <OS.h>
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#include "bget.h"
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#include <stdio.h>
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void set_area_buffer_management(void);
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void * expand_area_storage(long size);
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void contract_area_storage(void *buffer);
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void set_area_buffer_management(void)
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{
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bectl(NULL, expand_area_storage, contract_area_storage, B_PAGE_SIZE);
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}
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void * expand_area_storage(long size)
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{
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long areasize=0;
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area_id a;
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int *parea;
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if(size<B_PAGE_SIZE)
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areasize=B_PAGE_SIZE;
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else
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{
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if((size % B_PAGE_SIZE)!=0)
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areasize=((long)(size/B_PAGE_SIZE)+1)*B_PAGE_SIZE;
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else
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areasize=size;
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}
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a=create_area("bitmap_area",(void**)&parea,B_ANY_ADDRESS,areasize,
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B_NO_LOCK, B_READ_AREA | B_WRITE_AREA);
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if(a==B_BAD_VALUE ||
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a==B_NO_MEMORY ||
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a==B_ERROR)
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{
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printf("PANIC: BitmapManager couldn't allocate area!!\n");
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return NULL;
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}
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return parea;
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}
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void contract_area_storage(void *buffer)
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{
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area_id trash=area_for(buffer);
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if(trash==B_ERROR)
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return;
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delete_area(trash);
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}
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