joey shelton / LED_Demo2

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Dependencies:   MAX44000 PWM_Tone_Library nexpaq_mdk

Fork of LED_Demo by joey shelton

mbd_os/hal/common/FileBase.cpp@1:55a6170b404f, 2016-09-17 (annotated)

Committer:
nexpaq
Date:
Sat Sep 17 16:32:05 2016 +0000
Revision:
1:55a6170b404f
checking in for sharing

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nexpaq 1:55a6170b404f 1 /* mbed Microcontroller Library
nexpaq 1:55a6170b404f 2 * Copyright (c) 2006-2013 ARM Limited
nexpaq 1:55a6170b404f 3 *
nexpaq 1:55a6170b404f 4 * Licensed under the Apache License, Version 2.0 (the "License");
nexpaq 1:55a6170b404f 5 * you may not use this file except in compliance with the License.
nexpaq 1:55a6170b404f 6 * You may obtain a copy of the License at
nexpaq 1:55a6170b404f 7 *
nexpaq 1:55a6170b404f 8 * http://www.apache.org/licenses/LICENSE-2.0
nexpaq 1:55a6170b404f 9 *
nexpaq 1:55a6170b404f 10 * Unless required by applicable law or agreed to in writing, software
nexpaq 1:55a6170b404f 11 * distributed under the License is distributed on an "AS IS" BASIS,
nexpaq 1:55a6170b404f 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
nexpaq 1:55a6170b404f 13 * See the License for the specific language governing permissions and
nexpaq 1:55a6170b404f 14 * limitations under the License.
nexpaq 1:55a6170b404f 15 */
nexpaq 1:55a6170b404f 16 #include "FileBase.h"
nexpaq 1:55a6170b404f 17
nexpaq 1:55a6170b404f 18 namespace mbed {
nexpaq 1:55a6170b404f 19
nexpaq 1:55a6170b404f 20 FileBase *FileBase::_head = NULL;
nexpaq 1:55a6170b404f 21 SingletonPtr<PlatformMutex> FileBase::_mutex;
nexpaq 1:55a6170b404f 22
nexpaq 1:55a6170b404f 23 FileBase::FileBase(const char *name, PathType t) : _next(NULL),
nexpaq 1:55a6170b404f 24 _name(name),
nexpaq 1:55a6170b404f 25 _path_type(t) {
nexpaq 1:55a6170b404f 26 _mutex->lock();
nexpaq 1:55a6170b404f 27 if (name != NULL) {
nexpaq 1:55a6170b404f 28 // put this object at head of the list
nexpaq 1:55a6170b404f 29 _next = _head;
nexpaq 1:55a6170b404f 30 _head = this;
nexpaq 1:55a6170b404f 31 } else {
nexpaq 1:55a6170b404f 32 _next = NULL;
nexpaq 1:55a6170b404f 33 }
nexpaq 1:55a6170b404f 34 _mutex->unlock();
nexpaq 1:55a6170b404f 35 }
nexpaq 1:55a6170b404f 36
nexpaq 1:55a6170b404f 37 FileBase::~FileBase() {
nexpaq 1:55a6170b404f 38 _mutex->lock();
nexpaq 1:55a6170b404f 39 if (_name != NULL) {
nexpaq 1:55a6170b404f 40 // remove this object from the list
nexpaq 1:55a6170b404f 41 if (_head == this) { // first in the list, so just drop me
nexpaq 1:55a6170b404f 42 _head = _next;
nexpaq 1:55a6170b404f 43 } else { // find the object before me, then drop me
nexpaq 1:55a6170b404f 44 FileBase *p = _head;
nexpaq 1:55a6170b404f 45 while (p->_next != this) {
nexpaq 1:55a6170b404f 46 p = p->_next;
nexpaq 1:55a6170b404f 47 }
nexpaq 1:55a6170b404f 48 p->_next = _next;
nexpaq 1:55a6170b404f 49 }
nexpaq 1:55a6170b404f 50 }
nexpaq 1:55a6170b404f 51 _mutex->unlock();
nexpaq 1:55a6170b404f 52 }
nexpaq 1:55a6170b404f 53
nexpaq 1:55a6170b404f 54 FileBase *FileBase::lookup(const char *name, unsigned int len) {
nexpaq 1:55a6170b404f 55 _mutex->lock();
nexpaq 1:55a6170b404f 56 FileBase *p = _head;
nexpaq 1:55a6170b404f 57 while (p != NULL) {
nexpaq 1:55a6170b404f 58 /* Check that p->_name matches name and is the correct length */
nexpaq 1:55a6170b404f 59 if (p->_name != NULL && std::strncmp(p->_name, name, len) == 0 && std::strlen(p->_name) == len) {
nexpaq 1:55a6170b404f 60 _mutex->unlock();
nexpaq 1:55a6170b404f 61 return p;
nexpaq 1:55a6170b404f 62 }
nexpaq 1:55a6170b404f 63 p = p->_next;
nexpaq 1:55a6170b404f 64 }
nexpaq 1:55a6170b404f 65 _mutex->unlock();
nexpaq 1:55a6170b404f 66 return NULL;
nexpaq 1:55a6170b404f 67 }
nexpaq 1:55a6170b404f 68
nexpaq 1:55a6170b404f 69 FileBase *FileBase::get(int n) {
nexpaq 1:55a6170b404f 70 _mutex->lock();
nexpaq 1:55a6170b404f 71 FileBase *p = _head;
nexpaq 1:55a6170b404f 72 int m = 0;
nexpaq 1:55a6170b404f 73 while (p != NULL) {
nexpaq 1:55a6170b404f 74 if (m == n) {
nexpaq 1:55a6170b404f 75 _mutex->unlock();
nexpaq 1:55a6170b404f 76 return p;
nexpaq 1:55a6170b404f 77 }
nexpaq 1:55a6170b404f 78
nexpaq 1:55a6170b404f 79 m++;
nexpaq 1:55a6170b404f 80 p = p->_next;
nexpaq 1:55a6170b404f 81 }
nexpaq 1:55a6170b404f 82 _mutex->unlock();
nexpaq 1:55a6170b404f 83 return NULL;
nexpaq 1:55a6170b404f 84 }
nexpaq 1:55a6170b404f 85
nexpaq 1:55a6170b404f 86 const char* FileBase::getName(void) {
nexpaq 1:55a6170b404f 87 // Constant read so no lock needed
nexpaq 1:55a6170b404f 88 return _name;
nexpaq 1:55a6170b404f 89 }
nexpaq 1:55a6170b404f 90
nexpaq 1:55a6170b404f 91 PathType FileBase::getPathType(void) {
nexpaq 1:55a6170b404f 92 // Constant read so no lock needed
nexpaq 1:55a6170b404f 93 return _path_type;
nexpaq 1:55a6170b404f 94 }
nexpaq 1:55a6170b404f 95
nexpaq 1:55a6170b404f 96 } // namespace mbed
nexpaq 1:55a6170b404f 97