Kev Mann / mbed-dev-OS5_10_4

RTC auf true

platform/FileBase.cpp@0:38ceb79fef03, 2018-11-28 (annotated)

Committer:
kevman
Date:
Wed Nov 28 15:10:15 2018 +0000
Revision:
0:38ceb79fef03
RTC modified

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kevman 0:38ceb79fef03 1 /* mbed Microcontroller Library
kevman 0:38ceb79fef03 2 * Copyright (c) 2006-2013 ARM Limited
kevman 0:38ceb79fef03 3 *
kevman 0:38ceb79fef03 4 * Licensed under the Apache License, Version 2.0 (the "License");
kevman 0:38ceb79fef03 5 * you may not use this file except in compliance with the License.
kevman 0:38ceb79fef03 6 * You may obtain a copy of the License at
kevman 0:38ceb79fef03 7 *
kevman 0:38ceb79fef03 8 * http://www.apache.org/licenses/LICENSE-2.0
kevman 0:38ceb79fef03 9 *
kevman 0:38ceb79fef03 10 * Unless required by applicable law or agreed to in writing, software
kevman 0:38ceb79fef03 11 * distributed under the License is distributed on an "AS IS" BASIS,
kevman 0:38ceb79fef03 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
kevman 0:38ceb79fef03 13 * See the License for the specific language governing permissions and
kevman 0:38ceb79fef03 14 * limitations under the License.
kevman 0:38ceb79fef03 15 */
kevman 0:38ceb79fef03 16 #include <cstring>
kevman 0:38ceb79fef03 17
kevman 0:38ceb79fef03 18 #include "platform/FileBase.h"
kevman 0:38ceb79fef03 19 #include "platform/FileLike.h"
kevman 0:38ceb79fef03 20 #include "platform/FileHandle.h"
kevman 0:38ceb79fef03 21
kevman 0:38ceb79fef03 22 namespace mbed {
kevman 0:38ceb79fef03 23
kevman 0:38ceb79fef03 24 FileBase *FileBase::_head = NULL;
kevman 0:38ceb79fef03 25 SingletonPtr<PlatformMutex> FileBase::_mutex;
kevman 0:38ceb79fef03 26 FileBase *FileBase::_default = NULL;
kevman 0:38ceb79fef03 27
kevman 0:38ceb79fef03 28 FileBase::FileBase(const char *name, PathType t) : _next(NULL),
kevman 0:38ceb79fef03 29 _name(name),
kevman 0:38ceb79fef03 30 _path_type(t)
kevman 0:38ceb79fef03 31 {
kevman 0:38ceb79fef03 32 _mutex->lock();
kevman 0:38ceb79fef03 33 if (name != NULL) {
kevman 0:38ceb79fef03 34 // put this object at head of the list
kevman 0:38ceb79fef03 35 _next = _head;
kevman 0:38ceb79fef03 36 _head = this;
kevman 0:38ceb79fef03 37 } else {
kevman 0:38ceb79fef03 38 _next = NULL;
kevman 0:38ceb79fef03 39 }
kevman 0:38ceb79fef03 40 _mutex->unlock();
kevman 0:38ceb79fef03 41 }
kevman 0:38ceb79fef03 42
kevman 0:38ceb79fef03 43 FileBase::~FileBase()
kevman 0:38ceb79fef03 44 {
kevman 0:38ceb79fef03 45 _mutex->lock();
kevman 0:38ceb79fef03 46 if (_name != NULL) {
kevman 0:38ceb79fef03 47 // remove this object from the list
kevman 0:38ceb79fef03 48 if (_head == this) { // first in the list, so just drop me
kevman 0:38ceb79fef03 49 _head = _next;
kevman 0:38ceb79fef03 50 } else { // find the object before me, then drop me
kevman 0:38ceb79fef03 51 FileBase *p = _head;
kevman 0:38ceb79fef03 52 while (p->_next != this) {
kevman 0:38ceb79fef03 53 p = p->_next;
kevman 0:38ceb79fef03 54 }
kevman 0:38ceb79fef03 55 p->_next = _next;
kevman 0:38ceb79fef03 56 }
kevman 0:38ceb79fef03 57 }
kevman 0:38ceb79fef03 58
kevman 0:38ceb79fef03 59 if (_default == this) {
kevman 0:38ceb79fef03 60 _default = NULL;
kevman 0:38ceb79fef03 61 }
kevman 0:38ceb79fef03 62
kevman 0:38ceb79fef03 63 _mutex->unlock();
kevman 0:38ceb79fef03 64
kevman 0:38ceb79fef03 65 if (getPathType() == FilePathType) {
kevman 0:38ceb79fef03 66 extern void remove_filehandle(FileHandle *file);
kevman 0:38ceb79fef03 67 remove_filehandle(static_cast<FileLike *>(this));
kevman 0:38ceb79fef03 68 }
kevman 0:38ceb79fef03 69 }
kevman 0:38ceb79fef03 70
kevman 0:38ceb79fef03 71 void FileBase::set_as_default()
kevman 0:38ceb79fef03 72 {
kevman 0:38ceb79fef03 73 _mutex->lock();
kevman 0:38ceb79fef03 74 _default = this;
kevman 0:38ceb79fef03 75 _mutex->unlock();
kevman 0:38ceb79fef03 76 }
kevman 0:38ceb79fef03 77
kevman 0:38ceb79fef03 78 FileBase *FileBase::lookup(const char *name, unsigned int len)
kevman 0:38ceb79fef03 79 {
kevman 0:38ceb79fef03 80 _mutex->lock();
kevman 0:38ceb79fef03 81 FileBase *p = _head;
kevman 0:38ceb79fef03 82 while (p != NULL) {
kevman 0:38ceb79fef03 83 /* Check that p->_name matches name and is the correct length */
kevman 0:38ceb79fef03 84 if (p->_name != NULL && len == std::strlen(p->_name) && std::memcmp(p->_name, name, len) == 0) {
kevman 0:38ceb79fef03 85 _mutex->unlock();
kevman 0:38ceb79fef03 86 return p;
kevman 0:38ceb79fef03 87 }
kevman 0:38ceb79fef03 88 p = p->_next;
kevman 0:38ceb79fef03 89 }
kevman 0:38ceb79fef03 90 if (len == (sizeof "default") - 1 && std::memcmp("default", name, len) == 0) {
kevman 0:38ceb79fef03 91 _mutex->unlock();
kevman 0:38ceb79fef03 92 return _default;
kevman 0:38ceb79fef03 93 }
kevman 0:38ceb79fef03 94 _mutex->unlock();
kevman 0:38ceb79fef03 95 return NULL;
kevman 0:38ceb79fef03 96 }
kevman 0:38ceb79fef03 97
kevman 0:38ceb79fef03 98 FileBase *FileBase::get(int n)
kevman 0:38ceb79fef03 99 {
kevman 0:38ceb79fef03 100 _mutex->lock();
kevman 0:38ceb79fef03 101 FileBase *p = _head;
kevman 0:38ceb79fef03 102 int m = 0;
kevman 0:38ceb79fef03 103 while (p != NULL) {
kevman 0:38ceb79fef03 104 if (m == n) {
kevman 0:38ceb79fef03 105 _mutex->unlock();
kevman 0:38ceb79fef03 106 return p;
kevman 0:38ceb79fef03 107 }
kevman 0:38ceb79fef03 108
kevman 0:38ceb79fef03 109 m++;
kevman 0:38ceb79fef03 110 p = p->_next;
kevman 0:38ceb79fef03 111 }
kevman 0:38ceb79fef03 112 _mutex->unlock();
kevman 0:38ceb79fef03 113 return NULL;
kevman 0:38ceb79fef03 114 }
kevman 0:38ceb79fef03 115
kevman 0:38ceb79fef03 116 const char *FileBase::getName(void)
kevman 0:38ceb79fef03 117 {
kevman 0:38ceb79fef03 118 // Constant read so no lock needed
kevman 0:38ceb79fef03 119 return _name;
kevman 0:38ceb79fef03 120 }
kevman 0:38ceb79fef03 121
kevman 0:38ceb79fef03 122 PathType FileBase::getPathType(void)
kevman 0:38ceb79fef03 123 {
kevman 0:38ceb79fef03 124 // Constant read so no lock needed
kevman 0:38ceb79fef03 125 return _path_type;
kevman 0:38ceb79fef03 126 }
kevman 0:38ceb79fef03 127
kevman 0:38ceb79fef03 128 } // namespace mbed
kevman 0:38ceb79fef03 129