Takaaki Numai / mbed-dev

inport from local

Dependents:   Hobbyking_Cheetah_0511

platform/FileBase.cpp@0:85b3fd62ea1a, 2020-03-16 (annotated)

Committer:
NYX
Date:
Mon Mar 16 06:35:48 2020 +0000
Revision:
0:85b3fd62ea1a
reinport to mbed;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
NYX 0:85b3fd62ea1a 1 /* mbed Microcontroller Library
NYX 0:85b3fd62ea1a 2 * Copyright (c) 2006-2013 ARM Limited
NYX 0:85b3fd62ea1a 3 *
NYX 0:85b3fd62ea1a 4 * Licensed under the Apache License, Version 2.0 (the "License");
NYX 0:85b3fd62ea1a 5 * you may not use this file except in compliance with the License.
NYX 0:85b3fd62ea1a 6 * You may obtain a copy of the License at
NYX 0:85b3fd62ea1a 7 *
NYX 0:85b3fd62ea1a 8 * http://www.apache.org/licenses/LICENSE-2.0
NYX 0:85b3fd62ea1a 9 *
NYX 0:85b3fd62ea1a 10 * Unless required by applicable law or agreed to in writing, software
NYX 0:85b3fd62ea1a 11 * distributed under the License is distributed on an "AS IS" BASIS,
NYX 0:85b3fd62ea1a 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
NYX 0:85b3fd62ea1a 13 * See the License for the specific language governing permissions and
NYX 0:85b3fd62ea1a 14 * limitations under the License.
NYX 0:85b3fd62ea1a 15 */
NYX 0:85b3fd62ea1a 16 #include "platform/FileBase.h"
NYX 0:85b3fd62ea1a 17 #include "platform/FileLike.h"
NYX 0:85b3fd62ea1a 18 #include "platform/FileHandle.h"
NYX 0:85b3fd62ea1a 19
NYX 0:85b3fd62ea1a 20 namespace mbed {
NYX 0:85b3fd62ea1a 21
NYX 0:85b3fd62ea1a 22 FileBase *FileBase::_head = NULL;
NYX 0:85b3fd62ea1a 23 SingletonPtr<PlatformMutex> FileBase::_mutex;
NYX 0:85b3fd62ea1a 24
NYX 0:85b3fd62ea1a 25 FileBase::FileBase(const char *name, PathType t) : _next(NULL),
NYX 0:85b3fd62ea1a 26 _name(name),
NYX 0:85b3fd62ea1a 27 _path_type(t) {
NYX 0:85b3fd62ea1a 28 _mutex->lock();
NYX 0:85b3fd62ea1a 29 if (name != NULL) {
NYX 0:85b3fd62ea1a 30 // put this object at head of the list
NYX 0:85b3fd62ea1a 31 _next = _head;
NYX 0:85b3fd62ea1a 32 _head = this;
NYX 0:85b3fd62ea1a 33 } else {
NYX 0:85b3fd62ea1a 34 _next = NULL;
NYX 0:85b3fd62ea1a 35 }
NYX 0:85b3fd62ea1a 36 _mutex->unlock();
NYX 0:85b3fd62ea1a 37 }
NYX 0:85b3fd62ea1a 38
NYX 0:85b3fd62ea1a 39 FileBase::~FileBase() {
NYX 0:85b3fd62ea1a 40 _mutex->lock();
NYX 0:85b3fd62ea1a 41 if (_name != NULL) {
NYX 0:85b3fd62ea1a 42 // remove this object from the list
NYX 0:85b3fd62ea1a 43 if (_head == this) { // first in the list, so just drop me
NYX 0:85b3fd62ea1a 44 _head = _next;
NYX 0:85b3fd62ea1a 45 } else { // find the object before me, then drop me
NYX 0:85b3fd62ea1a 46 FileBase *p = _head;
NYX 0:85b3fd62ea1a 47 while (p->_next != this) {
NYX 0:85b3fd62ea1a 48 p = p->_next;
NYX 0:85b3fd62ea1a 49 }
NYX 0:85b3fd62ea1a 50 p->_next = _next;
NYX 0:85b3fd62ea1a 51 }
NYX 0:85b3fd62ea1a 52 }
NYX 0:85b3fd62ea1a 53 _mutex->unlock();
NYX 0:85b3fd62ea1a 54
NYX 0:85b3fd62ea1a 55 if (getPathType() == FilePathType) {
NYX 0:85b3fd62ea1a 56 extern void remove_filehandle(FileHandle *file);
NYX 0:85b3fd62ea1a 57 remove_filehandle(static_cast<FileHandle*>(static_cast<FileLike*>(this)));
NYX 0:85b3fd62ea1a 58 }
NYX 0:85b3fd62ea1a 59 }
NYX 0:85b3fd62ea1a 60
NYX 0:85b3fd62ea1a 61 FileBase *FileBase::lookup(const char *name, unsigned int len) {
NYX 0:85b3fd62ea1a 62 _mutex->lock();
NYX 0:85b3fd62ea1a 63 FileBase *p = _head;
NYX 0:85b3fd62ea1a 64 while (p != NULL) {
NYX 0:85b3fd62ea1a 65 /* Check that p->_name matches name and is the correct length */
NYX 0:85b3fd62ea1a 66 if (p->_name != NULL && std::strncmp(p->_name, name, len) == 0 && std::strlen(p->_name) == len) {
NYX 0:85b3fd62ea1a 67 _mutex->unlock();
NYX 0:85b3fd62ea1a 68 return p;
NYX 0:85b3fd62ea1a 69 }
NYX 0:85b3fd62ea1a 70 p = p->_next;
NYX 0:85b3fd62ea1a 71 }
NYX 0:85b3fd62ea1a 72 _mutex->unlock();
NYX 0:85b3fd62ea1a 73 return NULL;
NYX 0:85b3fd62ea1a 74 }
NYX 0:85b3fd62ea1a 75
NYX 0:85b3fd62ea1a 76 FileBase *FileBase::get(int n) {
NYX 0:85b3fd62ea1a 77 _mutex->lock();
NYX 0:85b3fd62ea1a 78 FileBase *p = _head;
NYX 0:85b3fd62ea1a 79 int m = 0;
NYX 0:85b3fd62ea1a 80 while (p != NULL) {
NYX 0:85b3fd62ea1a 81 if (m == n) {
NYX 0:85b3fd62ea1a 82 _mutex->unlock();
NYX 0:85b3fd62ea1a 83 return p;
NYX 0:85b3fd62ea1a 84 }
NYX 0:85b3fd62ea1a 85
NYX 0:85b3fd62ea1a 86 m++;
NYX 0:85b3fd62ea1a 87 p = p->_next;
NYX 0:85b3fd62ea1a 88 }
NYX 0:85b3fd62ea1a 89 _mutex->unlock();
NYX 0:85b3fd62ea1a 90 return NULL;
NYX 0:85b3fd62ea1a 91 }
NYX 0:85b3fd62ea1a 92
NYX 0:85b3fd62ea1a 93 const char* FileBase::getName(void) {
NYX 0:85b3fd62ea1a 94 // Constant read so no lock needed
NYX 0:85b3fd62ea1a 95 return _name;
NYX 0:85b3fd62ea1a 96 }
NYX 0:85b3fd62ea1a 97
NYX 0:85b3fd62ea1a 98 PathType FileBase::getPathType(void) {
NYX 0:85b3fd62ea1a 99 // Constant read so no lock needed
NYX 0:85b3fd62ea1a 100 return _path_type;
NYX 0:85b3fd62ea1a 101 }
NYX 0:85b3fd62ea1a 102
NYX 0:85b3fd62ea1a 103 } // namespace mbed
NYX 0:85b3fd62ea1a 104