Daiki Kato / mbed-os-lychee

mbed-os for GR-LYCHEE

Dependents:   mbed-os-example-blinky-gr-lychee GR-Boads_Camera_sample GR-Boards_Audio_Recoder GR-Boads_Camera_DisplayApp ... more

drivers/FileBase.cpp@0:f782d9c66c49, 2018-02-02 (annotated)

Committer:
dkato
Date:
Fri Feb 02 05:42:23 2018 +0000
Revision:
0:f782d9c66c49
mbed-os for GR-LYCHEE

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dkato 0:f782d9c66c49 1 /* mbed Microcontroller Library
dkato 0:f782d9c66c49 2 * Copyright (c) 2006-2013 ARM Limited
dkato 0:f782d9c66c49 3 *
dkato 0:f782d9c66c49 4 * Licensed under the Apache License, Version 2.0 (the "License");
dkato 0:f782d9c66c49 5 * you may not use this file except in compliance with the License.
dkato 0:f782d9c66c49 6 * You may obtain a copy of the License at
dkato 0:f782d9c66c49 7 *
dkato 0:f782d9c66c49 8 * http://www.apache.org/licenses/LICENSE-2.0
dkato 0:f782d9c66c49 9 *
dkato 0:f782d9c66c49 10 * Unless required by applicable law or agreed to in writing, software
dkato 0:f782d9c66c49 11 * distributed under the License is distributed on an "AS IS" BASIS,
dkato 0:f782d9c66c49 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
dkato 0:f782d9c66c49 13 * See the License for the specific language governing permissions and
dkato 0:f782d9c66c49 14 * limitations under the License.
dkato 0:f782d9c66c49 15 */
dkato 0:f782d9c66c49 16 #include "drivers/FileBase.h"
dkato 0:f782d9c66c49 17 #include "drivers/FileLike.h"
dkato 0:f782d9c66c49 18
dkato 0:f782d9c66c49 19 namespace mbed {
dkato 0:f782d9c66c49 20
dkato 0:f782d9c66c49 21 FileBase *FileBase::_head = NULL;
dkato 0:f782d9c66c49 22 SingletonPtr<PlatformMutex> FileBase::_mutex;
dkato 0:f782d9c66c49 23
dkato 0:f782d9c66c49 24 FileBase::FileBase(const char *name, PathType t) : _next(NULL),
dkato 0:f782d9c66c49 25 _name(name),
dkato 0:f782d9c66c49 26 _path_type(t) {
dkato 0:f782d9c66c49 27 _mutex->lock();
dkato 0:f782d9c66c49 28 if (name != NULL) {
dkato 0:f782d9c66c49 29 // put this object at head of the list
dkato 0:f782d9c66c49 30 _next = _head;
dkato 0:f782d9c66c49 31 _head = this;
dkato 0:f782d9c66c49 32 } else {
dkato 0:f782d9c66c49 33 _next = NULL;
dkato 0:f782d9c66c49 34 }
dkato 0:f782d9c66c49 35 _mutex->unlock();
dkato 0:f782d9c66c49 36 }
dkato 0:f782d9c66c49 37
dkato 0:f782d9c66c49 38 FileBase::~FileBase() {
dkato 0:f782d9c66c49 39 _mutex->lock();
dkato 0:f782d9c66c49 40 if (_name != NULL) {
dkato 0:f782d9c66c49 41 // remove this object from the list
dkato 0:f782d9c66c49 42 if (_head == this) { // first in the list, so just drop me
dkato 0:f782d9c66c49 43 _head = _next;
dkato 0:f782d9c66c49 44 } else { // find the object before me, then drop me
dkato 0:f782d9c66c49 45 FileBase *p = _head;
dkato 0:f782d9c66c49 46 while (p->_next != this) {
dkato 0:f782d9c66c49 47 p = p->_next;
dkato 0:f782d9c66c49 48 }
dkato 0:f782d9c66c49 49 p->_next = _next;
dkato 0:f782d9c66c49 50 }
dkato 0:f782d9c66c49 51 }
dkato 0:f782d9c66c49 52 _mutex->unlock();
dkato 0:f782d9c66c49 53
dkato 0:f782d9c66c49 54 if (getPathType() == FilePathType) {
dkato 0:f782d9c66c49 55 extern void remove_filehandle(FileLike *file);
dkato 0:f782d9c66c49 56 remove_filehandle(static_cast<FileLike*>(this));
dkato 0:f782d9c66c49 57 }
dkato 0:f782d9c66c49 58 }
dkato 0:f782d9c66c49 59
dkato 0:f782d9c66c49 60 FileBase *FileBase::lookup(const char *name, unsigned int len) {
dkato 0:f782d9c66c49 61 _mutex->lock();
dkato 0:f782d9c66c49 62 FileBase *p = _head;
dkato 0:f782d9c66c49 63 while (p != NULL) {
dkato 0:f782d9c66c49 64 /* Check that p->_name matches name and is the correct length */
dkato 0:f782d9c66c49 65 if (p->_name != NULL && std::strncmp(p->_name, name, len) == 0 && std::strlen(p->_name) == len) {
dkato 0:f782d9c66c49 66 _mutex->unlock();
dkato 0:f782d9c66c49 67 return p;
dkato 0:f782d9c66c49 68 }
dkato 0:f782d9c66c49 69 p = p->_next;
dkato 0:f782d9c66c49 70 }
dkato 0:f782d9c66c49 71 _mutex->unlock();
dkato 0:f782d9c66c49 72 return NULL;
dkato 0:f782d9c66c49 73 }
dkato 0:f782d9c66c49 74
dkato 0:f782d9c66c49 75 FileBase *FileBase::get(int n) {
dkato 0:f782d9c66c49 76 _mutex->lock();
dkato 0:f782d9c66c49 77 FileBase *p = _head;
dkato 0:f782d9c66c49 78 int m = 0;
dkato 0:f782d9c66c49 79 while (p != NULL) {
dkato 0:f782d9c66c49 80 if (m == n) {
dkato 0:f782d9c66c49 81 _mutex->unlock();
dkato 0:f782d9c66c49 82 return p;
dkato 0:f782d9c66c49 83 }
dkato 0:f782d9c66c49 84
dkato 0:f782d9c66c49 85 m++;
dkato 0:f782d9c66c49 86 p = p->_next;
dkato 0:f782d9c66c49 87 }
dkato 0:f782d9c66c49 88 _mutex->unlock();
dkato 0:f782d9c66c49 89 return NULL;
dkato 0:f782d9c66c49 90 }
dkato 0:f782d9c66c49 91
dkato 0:f782d9c66c49 92 const char* FileBase::getName(void) {
dkato 0:f782d9c66c49 93 // Constant read so no lock needed
dkato 0:f782d9c66c49 94 return _name;
dkato 0:f782d9c66c49 95 }
dkato 0:f782d9c66c49 96
dkato 0:f782d9c66c49 97 PathType FileBase::getPathType(void) {
dkato 0:f782d9c66c49 98 // Constant read so no lock needed
dkato 0:f782d9c66c49 99 return _path_type;
dkato 0:f782d9c66c49 100 }
dkato 0:f782d9c66c49 101
dkato 0:f782d9c66c49 102 } // namespace mbed
dkato 0:f782d9c66c49 103