Aditya Mehrotra / mbed-dev

Biomimetics MBED Library w/ Added Support for CAN3

Dependents:   CAN_TEST SPIne_Plus_DYNO_SENSORS SPIne_Plus_v2 SPIne_Plus_Dyno_v2

platform/FileBase.cpp@0:083111ae2a11, 2020-11-26 (annotated)

Committer:
saloutos
Date:
Thu Nov 26 04:08:56 2020 +0000
Revision:
0:083111ae2a11
first commit of leaned mbed dev lib

Who changed what in which revision?

UserRevisionLine numberNew contents of line
saloutos 0:083111ae2a11 1 /* mbed Microcontroller Library
saloutos 0:083111ae2a11 2 * Copyright (c) 2006-2013 ARM Limited
saloutos 0:083111ae2a11 3 *
saloutos 0:083111ae2a11 4 * Licensed under the Apache License, Version 2.0 (the "License");
saloutos 0:083111ae2a11 5 * you may not use this file except in compliance with the License.
saloutos 0:083111ae2a11 6 * You may obtain a copy of the License at
saloutos 0:083111ae2a11 7 *
saloutos 0:083111ae2a11 8 * http://www.apache.org/licenses/LICENSE-2.0
saloutos 0:083111ae2a11 9 *
saloutos 0:083111ae2a11 10 * Unless required by applicable law or agreed to in writing, software
saloutos 0:083111ae2a11 11 * distributed under the License is distributed on an "AS IS" BASIS,
saloutos 0:083111ae2a11 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
saloutos 0:083111ae2a11 13 * See the License for the specific language governing permissions and
saloutos 0:083111ae2a11 14 * limitations under the License.
saloutos 0:083111ae2a11 15 */
saloutos 0:083111ae2a11 16 #include "platform/FileBase.h"
saloutos 0:083111ae2a11 17 #include "platform/FileLike.h"
saloutos 0:083111ae2a11 18 #include "platform/FileHandle.h"
saloutos 0:083111ae2a11 19
saloutos 0:083111ae2a11 20 namespace mbed {
saloutos 0:083111ae2a11 21
saloutos 0:083111ae2a11 22 FileBase *FileBase::_head = NULL;
saloutos 0:083111ae2a11 23 SingletonPtr<PlatformMutex> FileBase::_mutex;
saloutos 0:083111ae2a11 24
saloutos 0:083111ae2a11 25 FileBase::FileBase(const char *name, PathType t) : _next(NULL),
saloutos 0:083111ae2a11 26 _name(name),
saloutos 0:083111ae2a11 27 _path_type(t) {
saloutos 0:083111ae2a11 28 _mutex->lock();
saloutos 0:083111ae2a11 29 if (name != NULL) {
saloutos 0:083111ae2a11 30 // put this object at head of the list
saloutos 0:083111ae2a11 31 _next = _head;
saloutos 0:083111ae2a11 32 _head = this;
saloutos 0:083111ae2a11 33 } else {
saloutos 0:083111ae2a11 34 _next = NULL;
saloutos 0:083111ae2a11 35 }
saloutos 0:083111ae2a11 36 _mutex->unlock();
saloutos 0:083111ae2a11 37 }
saloutos 0:083111ae2a11 38
saloutos 0:083111ae2a11 39 FileBase::~FileBase() {
saloutos 0:083111ae2a11 40 _mutex->lock();
saloutos 0:083111ae2a11 41 if (_name != NULL) {
saloutos 0:083111ae2a11 42 // remove this object from the list
saloutos 0:083111ae2a11 43 if (_head == this) { // first in the list, so just drop me
saloutos 0:083111ae2a11 44 _head = _next;
saloutos 0:083111ae2a11 45 } else { // find the object before me, then drop me
saloutos 0:083111ae2a11 46 FileBase *p = _head;
saloutos 0:083111ae2a11 47 while (p->_next != this) {
saloutos 0:083111ae2a11 48 p = p->_next;
saloutos 0:083111ae2a11 49 }
saloutos 0:083111ae2a11 50 p->_next = _next;
saloutos 0:083111ae2a11 51 }
saloutos 0:083111ae2a11 52 }
saloutos 0:083111ae2a11 53 _mutex->unlock();
saloutos 0:083111ae2a11 54
saloutos 0:083111ae2a11 55 if (getPathType() == FilePathType) {
saloutos 0:083111ae2a11 56 extern void remove_filehandle(FileHandle *file);
saloutos 0:083111ae2a11 57 remove_filehandle(static_cast<FileHandle*>(static_cast<FileLike*>(this)));
saloutos 0:083111ae2a11 58 }
saloutos 0:083111ae2a11 59 }
saloutos 0:083111ae2a11 60
saloutos 0:083111ae2a11 61 FileBase *FileBase::lookup(const char *name, unsigned int len) {
saloutos 0:083111ae2a11 62 _mutex->lock();
saloutos 0:083111ae2a11 63 FileBase *p = _head;
saloutos 0:083111ae2a11 64 while (p != NULL) {
saloutos 0:083111ae2a11 65 /* Check that p->_name matches name and is the correct length */
saloutos 0:083111ae2a11 66 if (p->_name != NULL && std::strncmp(p->_name, name, len) == 0 && std::strlen(p->_name) == len) {
saloutos 0:083111ae2a11 67 _mutex->unlock();
saloutos 0:083111ae2a11 68 return p;
saloutos 0:083111ae2a11 69 }
saloutos 0:083111ae2a11 70 p = p->_next;
saloutos 0:083111ae2a11 71 }
saloutos 0:083111ae2a11 72 _mutex->unlock();
saloutos 0:083111ae2a11 73 return NULL;
saloutos 0:083111ae2a11 74 }
saloutos 0:083111ae2a11 75
saloutos 0:083111ae2a11 76 FileBase *FileBase::get(int n) {
saloutos 0:083111ae2a11 77 _mutex->lock();
saloutos 0:083111ae2a11 78 FileBase *p = _head;
saloutos 0:083111ae2a11 79 int m = 0;
saloutos 0:083111ae2a11 80 while (p != NULL) {
saloutos 0:083111ae2a11 81 if (m == n) {
saloutos 0:083111ae2a11 82 _mutex->unlock();
saloutos 0:083111ae2a11 83 return p;
saloutos 0:083111ae2a11 84 }
saloutos 0:083111ae2a11 85
saloutos 0:083111ae2a11 86 m++;
saloutos 0:083111ae2a11 87 p = p->_next;
saloutos 0:083111ae2a11 88 }
saloutos 0:083111ae2a11 89 _mutex->unlock();
saloutos 0:083111ae2a11 90 return NULL;
saloutos 0:083111ae2a11 91 }
saloutos 0:083111ae2a11 92
saloutos 0:083111ae2a11 93 const char* FileBase::getName(void) {
saloutos 0:083111ae2a11 94 // Constant read so no lock needed
saloutos 0:083111ae2a11 95 return _name;
saloutos 0:083111ae2a11 96 }
saloutos 0:083111ae2a11 97
saloutos 0:083111ae2a11 98 PathType FileBase::getPathType(void) {
saloutos 0:083111ae2a11 99 // Constant read so no lock needed
saloutos 0:083111ae2a11 100 return _path_type;
saloutos 0:083111ae2a11 101 }
saloutos 0:083111ae2a11 102
saloutos 0:083111ae2a11 103 } // namespace mbed
saloutos 0:083111ae2a11 104