MacroRat / MouseCode

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Dependencies:   ITG3200 QEI

mbed-dev/drivers/FileBase.cpp@33:68ce1f74ab5f, 2017-05-26 (annotated)

Committer:
sahilmgandhi
Date:
Fri May 26 06:23:19 2017 +0000
Revision:
33:68ce1f74ab5f
Parent:
18:6a4db94011d3 
PID working with the new IRs now ... need to tune it a bit though.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sahilmgandhi 18:6a4db94011d3 1 /* mbed Microcontroller Library
sahilmgandhi 18:6a4db94011d3 2 * Copyright (c) 2006-2013 ARM Limited
sahilmgandhi 18:6a4db94011d3 3 *
sahilmgandhi 18:6a4db94011d3 4 * Licensed under the Apache License, Version 2.0 (the "License");
sahilmgandhi 18:6a4db94011d3 5 * you may not use this file except in compliance with the License.
sahilmgandhi 18:6a4db94011d3 6 * You may obtain a copy of the License at
sahilmgandhi 18:6a4db94011d3 7 *
sahilmgandhi 18:6a4db94011d3 8 * http://www.apache.org/licenses/LICENSE-2.0
sahilmgandhi 18:6a4db94011d3 9 *
sahilmgandhi 18:6a4db94011d3 10 * Unless required by applicable law or agreed to in writing, software
sahilmgandhi 18:6a4db94011d3 11 * distributed under the License is distributed on an "AS IS" BASIS,
sahilmgandhi 18:6a4db94011d3 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
sahilmgandhi 18:6a4db94011d3 13 * See the License for the specific language governing permissions and
sahilmgandhi 18:6a4db94011d3 14 * limitations under the License.
sahilmgandhi 18:6a4db94011d3 15 */
sahilmgandhi 18:6a4db94011d3 16 #include "drivers/FileBase.h"
sahilmgandhi 18:6a4db94011d3 17 #include "drivers/FileLike.h"
sahilmgandhi 18:6a4db94011d3 18
sahilmgandhi 18:6a4db94011d3 19 namespace mbed {
sahilmgandhi 18:6a4db94011d3 20
sahilmgandhi 18:6a4db94011d3 21 FileBase *FileBase::_head = NULL;
sahilmgandhi 18:6a4db94011d3 22 SingletonPtr<PlatformMutex> FileBase::_mutex;
sahilmgandhi 18:6a4db94011d3 23
sahilmgandhi 18:6a4db94011d3 24 FileBase::FileBase(const char *name, PathType t) : _next(NULL),
sahilmgandhi 18:6a4db94011d3 25 _name(name),
sahilmgandhi 18:6a4db94011d3 26 _path_type(t) {
sahilmgandhi 18:6a4db94011d3 27 _mutex->lock();
sahilmgandhi 18:6a4db94011d3 28 if (name != NULL) {
sahilmgandhi 18:6a4db94011d3 29 // put this object at head of the list
sahilmgandhi 18:6a4db94011d3 30 _next = _head;
sahilmgandhi 18:6a4db94011d3 31 _head = this;
sahilmgandhi 18:6a4db94011d3 32 } else {
sahilmgandhi 18:6a4db94011d3 33 _next = NULL;
sahilmgandhi 18:6a4db94011d3 34 }
sahilmgandhi 18:6a4db94011d3 35 _mutex->unlock();
sahilmgandhi 18:6a4db94011d3 36 }
sahilmgandhi 18:6a4db94011d3 37
sahilmgandhi 18:6a4db94011d3 38 FileBase::~FileBase() {
sahilmgandhi 18:6a4db94011d3 39 _mutex->lock();
sahilmgandhi 18:6a4db94011d3 40 if (_name != NULL) {
sahilmgandhi 18:6a4db94011d3 41 // remove this object from the list
sahilmgandhi 18:6a4db94011d3 42 if (_head == this) { // first in the list, so just drop me
sahilmgandhi 18:6a4db94011d3 43 _head = _next;
sahilmgandhi 18:6a4db94011d3 44 } else { // find the object before me, then drop me
sahilmgandhi 18:6a4db94011d3 45 FileBase *p = _head;
sahilmgandhi 18:6a4db94011d3 46 while (p->_next != this) {
sahilmgandhi 18:6a4db94011d3 47 p = p->_next;
sahilmgandhi 18:6a4db94011d3 48 }
sahilmgandhi 18:6a4db94011d3 49 p->_next = _next;
sahilmgandhi 18:6a4db94011d3 50 }
sahilmgandhi 18:6a4db94011d3 51 }
sahilmgandhi 18:6a4db94011d3 52 _mutex->unlock();
sahilmgandhi 18:6a4db94011d3 53
sahilmgandhi 18:6a4db94011d3 54 if (getPathType() == FilePathType) {
sahilmgandhi 18:6a4db94011d3 55 extern void remove_filehandle(FileLike *file);
sahilmgandhi 18:6a4db94011d3 56 remove_filehandle(static_cast<FileLike*>(this));
sahilmgandhi 18:6a4db94011d3 57 }
sahilmgandhi 18:6a4db94011d3 58 }
sahilmgandhi 18:6a4db94011d3 59
sahilmgandhi 18:6a4db94011d3 60 FileBase *FileBase::lookup(const char *name, unsigned int len) {
sahilmgandhi 18:6a4db94011d3 61 _mutex->lock();
sahilmgandhi 18:6a4db94011d3 62 FileBase *p = _head;
sahilmgandhi 18:6a4db94011d3 63 while (p != NULL) {
sahilmgandhi 18:6a4db94011d3 64 /* Check that p->_name matches name and is the correct length */
sahilmgandhi 18:6a4db94011d3 65 if (p->_name != NULL && std::strncmp(p->_name, name, len) == 0 && std::strlen(p->_name) == len) {
sahilmgandhi 18:6a4db94011d3 66 _mutex->unlock();
sahilmgandhi 18:6a4db94011d3 67 return p;
sahilmgandhi 18:6a4db94011d3 68 }
sahilmgandhi 18:6a4db94011d3 69 p = p->_next;
sahilmgandhi 18:6a4db94011d3 70 }
sahilmgandhi 18:6a4db94011d3 71 _mutex->unlock();
sahilmgandhi 18:6a4db94011d3 72 return NULL;
sahilmgandhi 18:6a4db94011d3 73 }
sahilmgandhi 18:6a4db94011d3 74
sahilmgandhi 18:6a4db94011d3 75 FileBase *FileBase::get(int n) {
sahilmgandhi 18:6a4db94011d3 76 _mutex->lock();
sahilmgandhi 18:6a4db94011d3 77 FileBase *p = _head;
sahilmgandhi 18:6a4db94011d3 78 int m = 0;
sahilmgandhi 18:6a4db94011d3 79 while (p != NULL) {
sahilmgandhi 18:6a4db94011d3 80 if (m == n) {
sahilmgandhi 18:6a4db94011d3 81 _mutex->unlock();
sahilmgandhi 18:6a4db94011d3 82 return p;
sahilmgandhi 18:6a4db94011d3 83 }
sahilmgandhi 18:6a4db94011d3 84
sahilmgandhi 18:6a4db94011d3 85 m++;
sahilmgandhi 18:6a4db94011d3 86 p = p->_next;
sahilmgandhi 18:6a4db94011d3 87 }
sahilmgandhi 18:6a4db94011d3 88 _mutex->unlock();
sahilmgandhi 18:6a4db94011d3 89 return NULL;
sahilmgandhi 18:6a4db94011d3 90 }
sahilmgandhi 18:6a4db94011d3 91
sahilmgandhi 18:6a4db94011d3 92 const char* FileBase::getName(void) {
sahilmgandhi 18:6a4db94011d3 93 // Constant read so no lock needed
sahilmgandhi 18:6a4db94011d3 94 return _name;
sahilmgandhi 18:6a4db94011d3 95 }
sahilmgandhi 18:6a4db94011d3 96
sahilmgandhi 18:6a4db94011d3 97 PathType FileBase::getPathType(void) {
sahilmgandhi 18:6a4db94011d3 98 // Constant read so no lock needed
sahilmgandhi 18:6a4db94011d3 99 return _path_type;
sahilmgandhi 18:6a4db94011d3 100 }
sahilmgandhi 18:6a4db94011d3 101
sahilmgandhi 18:6a4db94011d3 102 } // namespace mbed
sahilmgandhi 18:6a4db94011d3 103