EL4121 Embedded System / mbed-os

mbed-os

Dependents:   cobaLCDJoyMotor_Thread odometry_omni_3roda_v3 odometry_omni_3roda_v1 odometry_omni_3roda_v2 ... more

platform/FileBase.cpp@0:b74591d5ab33, 2017-12-11 (annotated)

Committer:
be_bryan
Date:
Mon Dec 11 17:54:04 2017 +0000
Revision:
0:b74591d5ab33
motor ++

Who changed what in which revision?

UserRevisionLine numberNew contents of line
be_bryan 0:b74591d5ab33 1 /* mbed Microcontroller Library
be_bryan 0:b74591d5ab33 2 * Copyright (c) 2006-2013 ARM Limited
be_bryan 0:b74591d5ab33 3 *
be_bryan 0:b74591d5ab33 4 * Licensed under the Apache License, Version 2.0 (the "License");
be_bryan 0:b74591d5ab33 5 * you may not use this file except in compliance with the License.
be_bryan 0:b74591d5ab33 6 * You may obtain a copy of the License at
be_bryan 0:b74591d5ab33 7 *
be_bryan 0:b74591d5ab33 8 * http://www.apache.org/licenses/LICENSE-2.0
be_bryan 0:b74591d5ab33 9 *
be_bryan 0:b74591d5ab33 10 * Unless required by applicable law or agreed to in writing, software
be_bryan 0:b74591d5ab33 11 * distributed under the License is distributed on an "AS IS" BASIS,
be_bryan 0:b74591d5ab33 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
be_bryan 0:b74591d5ab33 13 * See the License for the specific language governing permissions and
be_bryan 0:b74591d5ab33 14 * limitations under the License.
be_bryan 0:b74591d5ab33 15 */
be_bryan 0:b74591d5ab33 16 #include "platform/FileBase.h"
be_bryan 0:b74591d5ab33 17 #include "platform/FileLike.h"
be_bryan 0:b74591d5ab33 18 #include "platform/FileHandle.h"
be_bryan 0:b74591d5ab33 19
be_bryan 0:b74591d5ab33 20 namespace mbed {
be_bryan 0:b74591d5ab33 21
be_bryan 0:b74591d5ab33 22 FileBase *FileBase::_head = NULL;
be_bryan 0:b74591d5ab33 23 SingletonPtr<PlatformMutex> FileBase::_mutex;
be_bryan 0:b74591d5ab33 24
be_bryan 0:b74591d5ab33 25 FileBase::FileBase(const char *name, PathType t) : _next(NULL),
be_bryan 0:b74591d5ab33 26 _name(name),
be_bryan 0:b74591d5ab33 27 _path_type(t) {
be_bryan 0:b74591d5ab33 28 _mutex->lock();
be_bryan 0:b74591d5ab33 29 if (name != NULL) {
be_bryan 0:b74591d5ab33 30 // put this object at head of the list
be_bryan 0:b74591d5ab33 31 _next = _head;
be_bryan 0:b74591d5ab33 32 _head = this;
be_bryan 0:b74591d5ab33 33 } else {
be_bryan 0:b74591d5ab33 34 _next = NULL;
be_bryan 0:b74591d5ab33 35 }
be_bryan 0:b74591d5ab33 36 _mutex->unlock();
be_bryan 0:b74591d5ab33 37 }
be_bryan 0:b74591d5ab33 38
be_bryan 0:b74591d5ab33 39 FileBase::~FileBase() {
be_bryan 0:b74591d5ab33 40 _mutex->lock();
be_bryan 0:b74591d5ab33 41 if (_name != NULL) {
be_bryan 0:b74591d5ab33 42 // remove this object from the list
be_bryan 0:b74591d5ab33 43 if (_head == this) { // first in the list, so just drop me
be_bryan 0:b74591d5ab33 44 _head = _next;
be_bryan 0:b74591d5ab33 45 } else { // find the object before me, then drop me
be_bryan 0:b74591d5ab33 46 FileBase *p = _head;
be_bryan 0:b74591d5ab33 47 while (p->_next != this) {
be_bryan 0:b74591d5ab33 48 p = p->_next;
be_bryan 0:b74591d5ab33 49 }
be_bryan 0:b74591d5ab33 50 p->_next = _next;
be_bryan 0:b74591d5ab33 51 }
be_bryan 0:b74591d5ab33 52 }
be_bryan 0:b74591d5ab33 53 _mutex->unlock();
be_bryan 0:b74591d5ab33 54
be_bryan 0:b74591d5ab33 55 if (getPathType() == FilePathType) {
be_bryan 0:b74591d5ab33 56 extern void remove_filehandle(FileHandle *file);
be_bryan 0:b74591d5ab33 57 remove_filehandle(static_cast<FileHandle*>(static_cast<FileLike*>(this)));
be_bryan 0:b74591d5ab33 58 }
be_bryan 0:b74591d5ab33 59 }
be_bryan 0:b74591d5ab33 60
be_bryan 0:b74591d5ab33 61 FileBase *FileBase::lookup(const char *name, unsigned int len) {
be_bryan 0:b74591d5ab33 62 _mutex->lock();
be_bryan 0:b74591d5ab33 63 FileBase *p = _head;
be_bryan 0:b74591d5ab33 64 while (p != NULL) {
be_bryan 0:b74591d5ab33 65 /* Check that p->_name matches name and is the correct length */
be_bryan 0:b74591d5ab33 66 if (p->_name != NULL && std::strncmp(p->_name, name, len) == 0 && std::strlen(p->_name) == len) {
be_bryan 0:b74591d5ab33 67 _mutex->unlock();
be_bryan 0:b74591d5ab33 68 return p;
be_bryan 0:b74591d5ab33 69 }
be_bryan 0:b74591d5ab33 70 p = p->_next;
be_bryan 0:b74591d5ab33 71 }
be_bryan 0:b74591d5ab33 72 _mutex->unlock();
be_bryan 0:b74591d5ab33 73 return NULL;
be_bryan 0:b74591d5ab33 74 }
be_bryan 0:b74591d5ab33 75
be_bryan 0:b74591d5ab33 76 FileBase *FileBase::get(int n) {
be_bryan 0:b74591d5ab33 77 _mutex->lock();
be_bryan 0:b74591d5ab33 78 FileBase *p = _head;
be_bryan 0:b74591d5ab33 79 int m = 0;
be_bryan 0:b74591d5ab33 80 while (p != NULL) {
be_bryan 0:b74591d5ab33 81 if (m == n) {
be_bryan 0:b74591d5ab33 82 _mutex->unlock();
be_bryan 0:b74591d5ab33 83 return p;
be_bryan 0:b74591d5ab33 84 }
be_bryan 0:b74591d5ab33 85
be_bryan 0:b74591d5ab33 86 m++;
be_bryan 0:b74591d5ab33 87 p = p->_next;
be_bryan 0:b74591d5ab33 88 }
be_bryan 0:b74591d5ab33 89 _mutex->unlock();
be_bryan 0:b74591d5ab33 90 return NULL;
be_bryan 0:b74591d5ab33 91 }
be_bryan 0:b74591d5ab33 92
be_bryan 0:b74591d5ab33 93 const char* FileBase::getName(void) {
be_bryan 0:b74591d5ab33 94 // Constant read so no lock needed
be_bryan 0:b74591d5ab33 95 return _name;
be_bryan 0:b74591d5ab33 96 }
be_bryan 0:b74591d5ab33 97
be_bryan 0:b74591d5ab33 98 PathType FileBase::getPathType(void) {
be_bryan 0:b74591d5ab33 99 // Constant read so no lock needed
be_bryan 0:b74591d5ab33 100 return _path_type;
be_bryan 0:b74591d5ab33 101 }
be_bryan 0:b74591d5ab33 102
be_bryan 0:b74591d5ab33 103 } // namespace mbed
be_bryan 0:b74591d5ab33 104