Nitin Shukla / LED_Demo

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Dependencies:   MAX44000 nexpaq_mdk

Fork of LED_Demo by Maxim nexpaq

mbd_os/libraries/fs/fat/FATFileHandle.cpp@1:55a6170b404f, 2016-09-17 (annotated)

Committer:
nexpaq
Date:
Sat Sep 17 16:32:05 2016 +0000
Revision:
1:55a6170b404f
checking in for sharing

Who changed what in which revision?

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nexpaq 1:55a6170b404f 1 /* mbed Microcontroller Library
nexpaq 1:55a6170b404f 2 * Copyright (c) 2006-2012 ARM Limited
nexpaq 1:55a6170b404f 3 *
nexpaq 1:55a6170b404f 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
nexpaq 1:55a6170b404f 5 * of this software and associated documentation files (the "Software"), to deal
nexpaq 1:55a6170b404f 6 * in the Software without restriction, including without limitation the rights
nexpaq 1:55a6170b404f 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
nexpaq 1:55a6170b404f 8 * copies of the Software, and to permit persons to whom the Software is
nexpaq 1:55a6170b404f 9 * furnished to do so, subject to the following conditions:
nexpaq 1:55a6170b404f 10 *
nexpaq 1:55a6170b404f 11 * The above copyright notice and this permission notice shall be included in
nexpaq 1:55a6170b404f 12 * all copies or substantial portions of the Software.
nexpaq 1:55a6170b404f 13 *
nexpaq 1:55a6170b404f 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
nexpaq 1:55a6170b404f 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
nexpaq 1:55a6170b404f 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
nexpaq 1:55a6170b404f 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
nexpaq 1:55a6170b404f 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
nexpaq 1:55a6170b404f 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
nexpaq 1:55a6170b404f 20 * SOFTWARE.
nexpaq 1:55a6170b404f 21 */
nexpaq 1:55a6170b404f 22 #include "ff.h"
nexpaq 1:55a6170b404f 23 #include "ffconf.h"
nexpaq 1:55a6170b404f 24 #include "mbed_debug.h"
nexpaq 1:55a6170b404f 25
nexpaq 1:55a6170b404f 26 #include "FATFileHandle.h"
nexpaq 1:55a6170b404f 27
nexpaq 1:55a6170b404f 28 FATFileHandle::FATFileHandle(FIL fh, PlatformMutex * mutex): _mutex(mutex) {
nexpaq 1:55a6170b404f 29 _fh = fh;
nexpaq 1:55a6170b404f 30 }
nexpaq 1:55a6170b404f 31
nexpaq 1:55a6170b404f 32 int FATFileHandle::close() {
nexpaq 1:55a6170b404f 33 lock();
nexpaq 1:55a6170b404f 34 int retval = f_close(&_fh);
nexpaq 1:55a6170b404f 35 unlock();
nexpaq 1:55a6170b404f 36 delete this;
nexpaq 1:55a6170b404f 37 return retval;
nexpaq 1:55a6170b404f 38 }
nexpaq 1:55a6170b404f 39
nexpaq 1:55a6170b404f 40 ssize_t FATFileHandle::write(const void* buffer, size_t length) {
nexpaq 1:55a6170b404f 41 lock();
nexpaq 1:55a6170b404f 42 UINT n;
nexpaq 1:55a6170b404f 43 FRESULT res = f_write(&_fh, buffer, length, &n);
nexpaq 1:55a6170b404f 44 if (res) {
nexpaq 1:55a6170b404f 45 debug_if(FFS_DBG, "f_write() failed: %d", res);
nexpaq 1:55a6170b404f 46 unlock();
nexpaq 1:55a6170b404f 47 return -1;
nexpaq 1:55a6170b404f 48 }
nexpaq 1:55a6170b404f 49 unlock();
nexpaq 1:55a6170b404f 50 return n;
nexpaq 1:55a6170b404f 51 }
nexpaq 1:55a6170b404f 52
nexpaq 1:55a6170b404f 53 ssize_t FATFileHandle::read(void* buffer, size_t length) {
nexpaq 1:55a6170b404f 54 lock();
nexpaq 1:55a6170b404f 55 debug_if(FFS_DBG, "read(%d)\n", length);
nexpaq 1:55a6170b404f 56 UINT n;
nexpaq 1:55a6170b404f 57 FRESULT res = f_read(&_fh, buffer, length, &n);
nexpaq 1:55a6170b404f 58 if (res) {
nexpaq 1:55a6170b404f 59 debug_if(FFS_DBG, "f_read() failed: %d\n", res);
nexpaq 1:55a6170b404f 60 unlock();
nexpaq 1:55a6170b404f 61 return -1;
nexpaq 1:55a6170b404f 62 }
nexpaq 1:55a6170b404f 63 unlock();
nexpaq 1:55a6170b404f 64 return n;
nexpaq 1:55a6170b404f 65 }
nexpaq 1:55a6170b404f 66
nexpaq 1:55a6170b404f 67 int FATFileHandle::isatty() {
nexpaq 1:55a6170b404f 68 return 0;
nexpaq 1:55a6170b404f 69 }
nexpaq 1:55a6170b404f 70
nexpaq 1:55a6170b404f 71 off_t FATFileHandle::lseek(off_t position, int whence) {
nexpaq 1:55a6170b404f 72 lock();
nexpaq 1:55a6170b404f 73 if (whence == SEEK_END) {
nexpaq 1:55a6170b404f 74 position += _fh.fsize;
nexpaq 1:55a6170b404f 75 } else if(whence==SEEK_CUR) {
nexpaq 1:55a6170b404f 76 position += _fh.fptr;
nexpaq 1:55a6170b404f 77 }
nexpaq 1:55a6170b404f 78 FRESULT res = f_lseek(&_fh, position);
nexpaq 1:55a6170b404f 79 if (res) {
nexpaq 1:55a6170b404f 80 debug_if(FFS_DBG, "lseek failed: %d\n", res);
nexpaq 1:55a6170b404f 81 unlock();
nexpaq 1:55a6170b404f 82 return -1;
nexpaq 1:55a6170b404f 83 } else {
nexpaq 1:55a6170b404f 84 debug_if(FFS_DBG, "lseek OK, returning %i\n", _fh.fptr);
nexpaq 1:55a6170b404f 85 unlock();
nexpaq 1:55a6170b404f 86 return _fh.fptr;
nexpaq 1:55a6170b404f 87 }
nexpaq 1:55a6170b404f 88 }
nexpaq 1:55a6170b404f 89
nexpaq 1:55a6170b404f 90 int FATFileHandle::fsync() {
nexpaq 1:55a6170b404f 91 lock();
nexpaq 1:55a6170b404f 92 FRESULT res = f_sync(&_fh);
nexpaq 1:55a6170b404f 93 if (res) {
nexpaq 1:55a6170b404f 94 debug_if(FFS_DBG, "f_sync() failed: %d\n", res);
nexpaq 1:55a6170b404f 95 unlock();
nexpaq 1:55a6170b404f 96 return -1;
nexpaq 1:55a6170b404f 97 }
nexpaq 1:55a6170b404f 98 unlock();
nexpaq 1:55a6170b404f 99 return 0;
nexpaq 1:55a6170b404f 100 }
nexpaq 1:55a6170b404f 101
nexpaq 1:55a6170b404f 102 off_t FATFileHandle::flen() {
nexpaq 1:55a6170b404f 103 lock();
nexpaq 1:55a6170b404f 104 off_t size = _fh.fsize;
nexpaq 1:55a6170b404f 105 unlock();
nexpaq 1:55a6170b404f 106 return size;
nexpaq 1:55a6170b404f 107 }
nexpaq 1:55a6170b404f 108
nexpaq 1:55a6170b404f 109 void FATFileHandle::lock() {
nexpaq 1:55a6170b404f 110 _mutex->lock();
nexpaq 1:55a6170b404f 111 }
nexpaq 1:55a6170b404f 112
nexpaq 1:55a6170b404f 113 void FATFileHandle::unlock() {
nexpaq 1:55a6170b404f 114 _mutex->unlock();
nexpaq 1:55a6170b404f 115 }