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d0a546b049
Technical changes: * Factored out file specific information from the file descriptor structure into a new file structure. - Useful file metadata can be stored after the file is closed. - File descriptors become much smaller. - Significantly reduces the need to scan for the file end. * Use correct types in all function signatures. * Removed the directory cache. Results: * Enormous speed increase when opening cached files (10x-20x.) * Multiple fd:s pointing to the same file have the correct semantics. * About 100 bytes smaller ROM size. * Slightly smaller static RAM size.
81 lines
3.0 KiB
C
81 lines
3.0 KiB
C
/*
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* Copyright (c) 2008, Swedish Institute of Computer Science
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*/
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/**
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* \file
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* Coffee architecture-dependent header for the native platform.
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* \author
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* Nicolas Tsiftes <nvt@sics.se>
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*/
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#ifndef CFS_COFFEE_ARCH_H
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#define CFS_COFFEE_ARCH_H
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#include "contiki-conf.h"
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#include "dev/xmem.h"
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#define COFFEE_SECTOR_SIZE 65536UL
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#define COFFEE_PAGE_SIZE 256UL
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#define COFFEE_START COFFEE_SECTOR_SIZE
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#define COFFEE_SIZE ((1024UL * 1024UL) - COFFEE_START)
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#define COFFEE_PAGE_COUNT (COFFEE_SIZE / COFFEE_PAGE_SIZE)
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#define COFFEE_PAGES_PER_SECTOR (COFFEE_SECTOR_SIZE / COFFEE_PAGE_SIZE)
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#define COFFEE_NAME_LENGTH 16
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#define COFFEE_DYN_SIZE 16384
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#define COFFEE_MAX_OPEN_FILES 6
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#define COFFEE_FD_SET_SIZE 8
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#define COFFEE_LOG_DIVISOR 4
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#define COFFEE_LOG_SIZE 8192
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#define COFFEE_LOG_TABLE_LIMIT 256
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#define COFFEE_DIR_CACHE_ENTRIES 16
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#define COFFEE_WRITE(buf, size, offset) \
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xmem_pwrite((char *)(buf), (size), COFFEE_START + (offset))
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#define COFFEE_READ(buf, size, offset) \
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xmem_pread((char *)(buf), (size), COFFEE_START + (offset))
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#define COFFEE_ERASE(sector) \
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xmem_erase(COFFEE_SECTOR_SIZE, COFFEE_START + (sector) * COFFEE_SECTOR_SIZE)
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#define READ_HEADER(hdr, page) \
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COFFEE_READ((hdr), sizeof (*hdr), (page) * COFFEE_PAGE_SIZE)
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#define WRITE_HEADER(hdr, page) \
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COFFEE_WRITE((hdr), sizeof (*hdr), (page) * COFFEE_PAGE_SIZE)
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/* Coffee types. */
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typedef int16_t coffee_page_t;
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typedef int32_t coffee_offset_t;
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#endif /* !COFFEE_ARCH_H */
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