Nicolas Borla / Mbed OS BBR_1Ebene

BBR 1 Ebene

mbed-os/platform/FileBase.cpp@0:fbdae7e6d805, 2018-05-14 (annotated)

Committer:
borlanic
Date:
Mon May 14 11:29:06 2018 +0000
Revision:
0:fbdae7e6d805
BBR

Who changed what in which revision?

UserRevisionLine numberNew contents of line
borlanic 0:fbdae7e6d805 1 /* mbed Microcontroller Library
borlanic 0:fbdae7e6d805 2 * Copyright (c) 2006-2013 ARM Limited
borlanic 0:fbdae7e6d805 3 *
borlanic 0:fbdae7e6d805 4 * Licensed under the Apache License, Version 2.0 (the "License");
borlanic 0:fbdae7e6d805 5 * you may not use this file except in compliance with the License.
borlanic 0:fbdae7e6d805 6 * You may obtain a copy of the License at
borlanic 0:fbdae7e6d805 7 *
borlanic 0:fbdae7e6d805 8 * http://www.apache.org/licenses/LICENSE-2.0
borlanic 0:fbdae7e6d805 9 *
borlanic 0:fbdae7e6d805 10 * Unless required by applicable law or agreed to in writing, software
borlanic 0:fbdae7e6d805 11 * distributed under the License is distributed on an "AS IS" BASIS,
borlanic 0:fbdae7e6d805 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
borlanic 0:fbdae7e6d805 13 * See the License for the specific language governing permissions and
borlanic 0:fbdae7e6d805 14 * limitations under the License.
borlanic 0:fbdae7e6d805 15 */
borlanic 0:fbdae7e6d805 16 #include "platform/FileBase.h"
borlanic 0:fbdae7e6d805 17 #include "platform/FileLike.h"
borlanic 0:fbdae7e6d805 18 #include "platform/FileHandle.h"
borlanic 0:fbdae7e6d805 19
borlanic 0:fbdae7e6d805 20 namespace mbed {
borlanic 0:fbdae7e6d805 21
borlanic 0:fbdae7e6d805 22 FileBase *FileBase::_head = NULL;
borlanic 0:fbdae7e6d805 23 SingletonPtr<PlatformMutex> FileBase::_mutex;
borlanic 0:fbdae7e6d805 24
borlanic 0:fbdae7e6d805 25 FileBase::FileBase(const char *name, PathType t) : _next(NULL),
borlanic 0:fbdae7e6d805 26 _name(name),
borlanic 0:fbdae7e6d805 27 _path_type(t) {
borlanic 0:fbdae7e6d805 28 _mutex->lock();
borlanic 0:fbdae7e6d805 29 if (name != NULL) {
borlanic 0:fbdae7e6d805 30 // put this object at head of the list
borlanic 0:fbdae7e6d805 31 _next = _head;
borlanic 0:fbdae7e6d805 32 _head = this;
borlanic 0:fbdae7e6d805 33 } else {
borlanic 0:fbdae7e6d805 34 _next = NULL;
borlanic 0:fbdae7e6d805 35 }
borlanic 0:fbdae7e6d805 36 _mutex->unlock();
borlanic 0:fbdae7e6d805 37 }
borlanic 0:fbdae7e6d805 38
borlanic 0:fbdae7e6d805 39 FileBase::~FileBase() {
borlanic 0:fbdae7e6d805 40 _mutex->lock();
borlanic 0:fbdae7e6d805 41 if (_name != NULL) {
borlanic 0:fbdae7e6d805 42 // remove this object from the list
borlanic 0:fbdae7e6d805 43 if (_head == this) { // first in the list, so just drop me
borlanic 0:fbdae7e6d805 44 _head = _next;
borlanic 0:fbdae7e6d805 45 } else { // find the object before me, then drop me
borlanic 0:fbdae7e6d805 46 FileBase *p = _head;
borlanic 0:fbdae7e6d805 47 while (p->_next != this) {
borlanic 0:fbdae7e6d805 48 p = p->_next;
borlanic 0:fbdae7e6d805 49 }
borlanic 0:fbdae7e6d805 50 p->_next = _next;
borlanic 0:fbdae7e6d805 51 }
borlanic 0:fbdae7e6d805 52 }
borlanic 0:fbdae7e6d805 53 _mutex->unlock();
borlanic 0:fbdae7e6d805 54
borlanic 0:fbdae7e6d805 55 if (getPathType() == FilePathType) {
borlanic 0:fbdae7e6d805 56 extern void remove_filehandle(FileHandle *file);
borlanic 0:fbdae7e6d805 57 remove_filehandle(static_cast<FileHandle*>(static_cast<FileLike*>(this)));
borlanic 0:fbdae7e6d805 58 }
borlanic 0:fbdae7e6d805 59 }
borlanic 0:fbdae7e6d805 60
borlanic 0:fbdae7e6d805 61 FileBase *FileBase::lookup(const char *name, unsigned int len) {
borlanic 0:fbdae7e6d805 62 _mutex->lock();
borlanic 0:fbdae7e6d805 63 FileBase *p = _head;
borlanic 0:fbdae7e6d805 64 while (p != NULL) {
borlanic 0:fbdae7e6d805 65 /* Check that p->_name matches name and is the correct length */
borlanic 0:fbdae7e6d805 66 if (p->_name != NULL && std::strncmp(p->_name, name, len) == 0 && std::strlen(p->_name) == len) {
borlanic 0:fbdae7e6d805 67 _mutex->unlock();
borlanic 0:fbdae7e6d805 68 return p;
borlanic 0:fbdae7e6d805 69 }
borlanic 0:fbdae7e6d805 70 p = p->_next;
borlanic 0:fbdae7e6d805 71 }
borlanic 0:fbdae7e6d805 72 _mutex->unlock();
borlanic 0:fbdae7e6d805 73 return NULL;
borlanic 0:fbdae7e6d805 74 }
borlanic 0:fbdae7e6d805 75
borlanic 0:fbdae7e6d805 76 FileBase *FileBase::get(int n) {
borlanic 0:fbdae7e6d805 77 _mutex->lock();
borlanic 0:fbdae7e6d805 78 FileBase *p = _head;
borlanic 0:fbdae7e6d805 79 int m = 0;
borlanic 0:fbdae7e6d805 80 while (p != NULL) {
borlanic 0:fbdae7e6d805 81 if (m == n) {
borlanic 0:fbdae7e6d805 82 _mutex->unlock();
borlanic 0:fbdae7e6d805 83 return p;
borlanic 0:fbdae7e6d805 84 }
borlanic 0:fbdae7e6d805 85
borlanic 0:fbdae7e6d805 86 m++;
borlanic 0:fbdae7e6d805 87 p = p->_next;
borlanic 0:fbdae7e6d805 88 }
borlanic 0:fbdae7e6d805 89 _mutex->unlock();
borlanic 0:fbdae7e6d805 90 return NULL;
borlanic 0:fbdae7e6d805 91 }
borlanic 0:fbdae7e6d805 92
borlanic 0:fbdae7e6d805 93 const char* FileBase::getName(void) {
borlanic 0:fbdae7e6d805 94 // Constant read so no lock needed
borlanic 0:fbdae7e6d805 95 return _name;
borlanic 0:fbdae7e6d805 96 }
borlanic 0:fbdae7e6d805 97
borlanic 0:fbdae7e6d805 98 PathType FileBase::getPathType(void) {
borlanic 0:fbdae7e6d805 99 // Constant read so no lock needed
borlanic 0:fbdae7e6d805 100 return _path_type;
borlanic 0:fbdae7e6d805 101 }
borlanic 0:fbdae7e6d805 102
borlanic 0:fbdae7e6d805 103 } // namespace mbed
borlanic 0:fbdae7e6d805 104