Bhavin Darji / FATFileSystem

old repo - SD card read example

Dependents:   SDFileSystem

Fork of FATFileSystem by mbed official

FATFileHandle.cpp@8:c4baca9a2c3d, 2016-08-25 (annotated)

Committer:
Kojto
Date:
Thu Aug 25 09:34:29 2016 +0100
Revision:
8:c4baca9a2c3d
Parent:
4:3ff2606d5713 
Synchronized with git revision 4047ff95767d307



- fix _name error (getName())

- add thread safety

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 1:46ce1e16c870 1 /* mbed Microcontroller Library
emilmont 1:46ce1e16c870 2 * Copyright (c) 2006-2012 ARM Limited
emilmont 1:46ce1e16c870 3 *
emilmont 1:46ce1e16c870 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
emilmont 1:46ce1e16c870 5 * of this software and associated documentation files (the "Software"), to deal
emilmont 1:46ce1e16c870 6 * in the Software without restriction, including without limitation the rights
emilmont 1:46ce1e16c870 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
emilmont 1:46ce1e16c870 8 * copies of the Software, and to permit persons to whom the Software is
emilmont 1:46ce1e16c870 9 * furnished to do so, subject to the following conditions:
emilmont 1:46ce1e16c870 10 *
emilmont 1:46ce1e16c870 11 * The above copyright notice and this permission notice shall be included in
emilmont 1:46ce1e16c870 12 * all copies or substantial portions of the Software.
emilmont 1:46ce1e16c870 13 *
emilmont 1:46ce1e16c870 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
emilmont 1:46ce1e16c870 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
emilmont 1:46ce1e16c870 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
emilmont 1:46ce1e16c870 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
emilmont 1:46ce1e16c870 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
emilmont 1:46ce1e16c870 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
emilmont 1:46ce1e16c870 20 * SOFTWARE.
emilmont 1:46ce1e16c870 21 */
emilmont 1:46ce1e16c870 22 #include "ff.h"
emilmont 1:46ce1e16c870 23 #include "ffconf.h"
emilmont 2:b6669c987c8e 24 #include "mbed_debug.h"
emilmont 1:46ce1e16c870 25
emilmont 1:46ce1e16c870 26 #include "FATFileHandle.h"
emilmont 1:46ce1e16c870 27
Kojto 8:c4baca9a2c3d 28 FATFileHandle::FATFileHandle(FIL fh, PlatformMutex * mutex): _mutex(mutex) {
emilmont 1:46ce1e16c870 29 _fh = fh;
emilmont 1:46ce1e16c870 30 }
emilmont 1:46ce1e16c870 31
emilmont 1:46ce1e16c870 32 int FATFileHandle::close() {
Kojto 8:c4baca9a2c3d 33 lock();
emilmont 1:46ce1e16c870 34 int retval = f_close(&_fh);
Kojto 8:c4baca9a2c3d 35 unlock();
emilmont 1:46ce1e16c870 36 delete this;
emilmont 1:46ce1e16c870 37 return retval;
emilmont 1:46ce1e16c870 38 }
emilmont 1:46ce1e16c870 39
emilmont 1:46ce1e16c870 40 ssize_t FATFileHandle::write(const void* buffer, size_t length) {
Kojto 8:c4baca9a2c3d 41 lock();
emilmont 1:46ce1e16c870 42 UINT n;
emilmont 1:46ce1e16c870 43 FRESULT res = f_write(&_fh, buffer, length, &n);
mbed_official 4:3ff2606d5713 44 if (res) {
emilmont 1:46ce1e16c870 45 debug_if(FFS_DBG, "f_write() failed: %d", res);
Kojto 8:c4baca9a2c3d 46 unlock();
emilmont 1:46ce1e16c870 47 return -1;
emilmont 1:46ce1e16c870 48 }
Kojto 8:c4baca9a2c3d 49 unlock();
emilmont 1:46ce1e16c870 50 return n;
emilmont 1:46ce1e16c870 51 }
mbed_official 4:3ff2606d5713 52
emilmont 1:46ce1e16c870 53 ssize_t FATFileHandle::read(void* buffer, size_t length) {
Kojto 8:c4baca9a2c3d 54 lock();
emilmont 1:46ce1e16c870 55 debug_if(FFS_DBG, "read(%d)\n", length);
emilmont 1:46ce1e16c870 56 UINT n;
emilmont 1:46ce1e16c870 57 FRESULT res = f_read(&_fh, buffer, length, &n);
emilmont 1:46ce1e16c870 58 if (res) {
emilmont 1:46ce1e16c870 59 debug_if(FFS_DBG, "f_read() failed: %d\n", res);
Kojto 8:c4baca9a2c3d 60 unlock();
emilmont 1:46ce1e16c870 61 return -1;
emilmont 1:46ce1e16c870 62 }
Kojto 8:c4baca9a2c3d 63 unlock();
emilmont 1:46ce1e16c870 64 return n;
emilmont 1:46ce1e16c870 65 }
emilmont 1:46ce1e16c870 66
emilmont 1:46ce1e16c870 67 int FATFileHandle::isatty() {
emilmont 1:46ce1e16c870 68 return 0;
emilmont 1:46ce1e16c870 69 }
emilmont 1:46ce1e16c870 70
emilmont 1:46ce1e16c870 71 off_t FATFileHandle::lseek(off_t position, int whence) {
Kojto 8:c4baca9a2c3d 72 lock();
emilmont 1:46ce1e16c870 73 if (whence == SEEK_END) {
emilmont 1:46ce1e16c870 74 position += _fh.fsize;
emilmont 1:46ce1e16c870 75 } else if(whence==SEEK_CUR) {
emilmont 1:46ce1e16c870 76 position += _fh.fptr;
emilmont 1:46ce1e16c870 77 }
emilmont 1:46ce1e16c870 78 FRESULT res = f_lseek(&_fh, position);
emilmont 1:46ce1e16c870 79 if (res) {
emilmont 1:46ce1e16c870 80 debug_if(FFS_DBG, "lseek failed: %d\n", res);
Kojto 8:c4baca9a2c3d 81 unlock();
emilmont 1:46ce1e16c870 82 return -1;
emilmont 1:46ce1e16c870 83 } else {
emilmont 1:46ce1e16c870 84 debug_if(FFS_DBG, "lseek OK, returning %i\n", _fh.fptr);
Kojto 8:c4baca9a2c3d 85 unlock();
emilmont 1:46ce1e16c870 86 return _fh.fptr;
emilmont 1:46ce1e16c870 87 }
emilmont 1:46ce1e16c870 88 }
emilmont 1:46ce1e16c870 89
emilmont 1:46ce1e16c870 90 int FATFileHandle::fsync() {
Kojto 8:c4baca9a2c3d 91 lock();
emilmont 1:46ce1e16c870 92 FRESULT res = f_sync(&_fh);
emilmont 1:46ce1e16c870 93 if (res) {
emilmont 1:46ce1e16c870 94 debug_if(FFS_DBG, "f_sync() failed: %d\n", res);
Kojto 8:c4baca9a2c3d 95 unlock();
emilmont 1:46ce1e16c870 96 return -1;
emilmont 1:46ce1e16c870 97 }
Kojto 8:c4baca9a2c3d 98 unlock();
emilmont 1:46ce1e16c870 99 return 0;
emilmont 1:46ce1e16c870 100 }
emilmont 1:46ce1e16c870 101
emilmont 1:46ce1e16c870 102 off_t FATFileHandle::flen() {
Kojto 8:c4baca9a2c3d 103 lock();
Kojto 8:c4baca9a2c3d 104 off_t size = _fh.fsize;
Kojto 8:c4baca9a2c3d 105 unlock();
Kojto 8:c4baca9a2c3d 106 return size;
emilmont 1:46ce1e16c870 107 }
Kojto 8:c4baca9a2c3d 108
Kojto 8:c4baca9a2c3d 109 void FATFileHandle::lock() {
Kojto 8:c4baca9a2c3d 110 _mutex->lock();
Kojto 8:c4baca9a2c3d 111 }
Kojto 8:c4baca9a2c3d 112
Kojto 8:c4baca9a2c3d 113 void FATFileHandle::unlock() {
Kojto 8:c4baca9a2c3d 114 _mutex->unlock();
Kojto 8:c4baca9a2c3d 115 }