mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

platform/FileBase.cpp@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
188:bcfe06ba3d64 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 167:e84263d55307 1 /* mbed Microcontroller Library
AnnaBridge 167:e84263d55307 2 * Copyright (c) 2006-2013 ARM Limited
AnnaBridge 189:f392fc9709a3 3 * SPDX-License-Identifier: Apache-2.0
AnnaBridge 167:e84263d55307 4 *
AnnaBridge 167:e84263d55307 5 * Licensed under the Apache License, Version 2.0 (the "License");
AnnaBridge 167:e84263d55307 6 * you may not use this file except in compliance with the License.
AnnaBridge 167:e84263d55307 7 * You may obtain a copy of the License at
AnnaBridge 167:e84263d55307 8 *
AnnaBridge 167:e84263d55307 9 * http://www.apache.org/licenses/LICENSE-2.0
AnnaBridge 167:e84263d55307 10 *
AnnaBridge 167:e84263d55307 11 * Unless required by applicable law or agreed to in writing, software
AnnaBridge 167:e84263d55307 12 * distributed under the License is distributed on an "AS IS" BASIS,
AnnaBridge 167:e84263d55307 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
AnnaBridge 167:e84263d55307 14 * See the License for the specific language governing permissions and
AnnaBridge 167:e84263d55307 15 * limitations under the License.
AnnaBridge 167:e84263d55307 16 */
AnnaBridge 188:bcfe06ba3d64 17 #include <cstring>
AnnaBridge 188:bcfe06ba3d64 18
AnnaBridge 167:e84263d55307 19 #include "platform/FileBase.h"
AnnaBridge 167:e84263d55307 20 #include "platform/FileLike.h"
AnnaBridge 167:e84263d55307 21 #include "platform/FileHandle.h"
AnnaBridge 167:e84263d55307 22
AnnaBridge 167:e84263d55307 23 namespace mbed {
AnnaBridge 167:e84263d55307 24
AnnaBridge 167:e84263d55307 25 FileBase *FileBase::_head = NULL;
AnnaBridge 167:e84263d55307 26 SingletonPtr<PlatformMutex> FileBase::_mutex;
AnnaBridge 188:bcfe06ba3d64 27 FileBase *FileBase::_default = NULL;
AnnaBridge 167:e84263d55307 28
AnnaBridge 167:e84263d55307 29 FileBase::FileBase(const char *name, PathType t) : _next(NULL),
AnnaBridge 187:0387e8f68319 30 _name(name),
AnnaBridge 187:0387e8f68319 31 _path_type(t)
AnnaBridge 187:0387e8f68319 32 {
AnnaBridge 167:e84263d55307 33 _mutex->lock();
AnnaBridge 167:e84263d55307 34 if (name != NULL) {
AnnaBridge 167:e84263d55307 35 // put this object at head of the list
AnnaBridge 167:e84263d55307 36 _next = _head;
AnnaBridge 167:e84263d55307 37 _head = this;
AnnaBridge 167:e84263d55307 38 } else {
AnnaBridge 167:e84263d55307 39 _next = NULL;
AnnaBridge 167:e84263d55307 40 }
AnnaBridge 167:e84263d55307 41 _mutex->unlock();
AnnaBridge 167:e84263d55307 42 }
AnnaBridge 167:e84263d55307 43
AnnaBridge 187:0387e8f68319 44 FileBase::~FileBase()
AnnaBridge 187:0387e8f68319 45 {
AnnaBridge 167:e84263d55307 46 _mutex->lock();
AnnaBridge 167:e84263d55307 47 if (_name != NULL) {
AnnaBridge 167:e84263d55307 48 // remove this object from the list
AnnaBridge 167:e84263d55307 49 if (_head == this) { // first in the list, so just drop me
AnnaBridge 167:e84263d55307 50 _head = _next;
AnnaBridge 167:e84263d55307 51 } else { // find the object before me, then drop me
AnnaBridge 167:e84263d55307 52 FileBase *p = _head;
AnnaBridge 167:e84263d55307 53 while (p->_next != this) {
AnnaBridge 167:e84263d55307 54 p = p->_next;
AnnaBridge 167:e84263d55307 55 }
AnnaBridge 167:e84263d55307 56 p->_next = _next;
AnnaBridge 167:e84263d55307 57 }
AnnaBridge 167:e84263d55307 58 }
AnnaBridge 188:bcfe06ba3d64 59
AnnaBridge 188:bcfe06ba3d64 60 if (_default == this) {
AnnaBridge 188:bcfe06ba3d64 61 _default = NULL;
AnnaBridge 188:bcfe06ba3d64 62 }
AnnaBridge 188:bcfe06ba3d64 63
AnnaBridge 167:e84263d55307 64 _mutex->unlock();
AnnaBridge 167:e84263d55307 65
AnnaBridge 167:e84263d55307 66 if (getPathType() == FilePathType) {
AnnaBridge 189:f392fc9709a3 67 extern void remove_filehandle(FileHandle * file);
AnnaBridge 188:bcfe06ba3d64 68 remove_filehandle(static_cast<FileLike *>(this));
AnnaBridge 167:e84263d55307 69 }
AnnaBridge 167:e84263d55307 70 }
AnnaBridge 167:e84263d55307 71
AnnaBridge 188:bcfe06ba3d64 72 void FileBase::set_as_default()
AnnaBridge 188:bcfe06ba3d64 73 {
AnnaBridge 188:bcfe06ba3d64 74 _mutex->lock();
AnnaBridge 188:bcfe06ba3d64 75 _default = this;
AnnaBridge 188:bcfe06ba3d64 76 _mutex->unlock();
AnnaBridge 188:bcfe06ba3d64 77 }
AnnaBridge 188:bcfe06ba3d64 78
AnnaBridge 187:0387e8f68319 79 FileBase *FileBase::lookup(const char *name, unsigned int len)
AnnaBridge 187:0387e8f68319 80 {
AnnaBridge 167:e84263d55307 81 _mutex->lock();
AnnaBridge 167:e84263d55307 82 FileBase *p = _head;
AnnaBridge 167:e84263d55307 83 while (p != NULL) {
AnnaBridge 167:e84263d55307 84 /* Check that p->_name matches name and is the correct length */
AnnaBridge 188:bcfe06ba3d64 85 if (p->_name != NULL && len == std::strlen(p->_name) && std::memcmp(p->_name, name, len) == 0) {
AnnaBridge 167:e84263d55307 86 _mutex->unlock();
AnnaBridge 167:e84263d55307 87 return p;
AnnaBridge 167:e84263d55307 88 }
AnnaBridge 167:e84263d55307 89 p = p->_next;
AnnaBridge 167:e84263d55307 90 }
AnnaBridge 188:bcfe06ba3d64 91 if (len == (sizeof "default") - 1 && std::memcmp("default", name, len) == 0) {
AnnaBridge 188:bcfe06ba3d64 92 _mutex->unlock();
AnnaBridge 188:bcfe06ba3d64 93 return _default;
AnnaBridge 188:bcfe06ba3d64 94 }
AnnaBridge 167:e84263d55307 95 _mutex->unlock();
AnnaBridge 167:e84263d55307 96 return NULL;
AnnaBridge 167:e84263d55307 97 }
AnnaBridge 167:e84263d55307 98
AnnaBridge 187:0387e8f68319 99 FileBase *FileBase::get(int n)
AnnaBridge 187:0387e8f68319 100 {
AnnaBridge 167:e84263d55307 101 _mutex->lock();
AnnaBridge 167:e84263d55307 102 FileBase *p = _head;
AnnaBridge 167:e84263d55307 103 int m = 0;
AnnaBridge 167:e84263d55307 104 while (p != NULL) {
AnnaBridge 167:e84263d55307 105 if (m == n) {
AnnaBridge 167:e84263d55307 106 _mutex->unlock();
AnnaBridge 167:e84263d55307 107 return p;
AnnaBridge 167:e84263d55307 108 }
AnnaBridge 167:e84263d55307 109
AnnaBridge 167:e84263d55307 110 m++;
AnnaBridge 167:e84263d55307 111 p = p->_next;
AnnaBridge 167:e84263d55307 112 }
AnnaBridge 167:e84263d55307 113 _mutex->unlock();
AnnaBridge 167:e84263d55307 114 return NULL;
AnnaBridge 167:e84263d55307 115 }
AnnaBridge 167:e84263d55307 116
AnnaBridge 187:0387e8f68319 117 const char *FileBase::getName(void)
AnnaBridge 187:0387e8f68319 118 {
AnnaBridge 167:e84263d55307 119 // Constant read so no lock needed
AnnaBridge 167:e84263d55307 120 return _name;
AnnaBridge 167:e84263d55307 121 }
AnnaBridge 167:e84263d55307 122
AnnaBridge 187:0387e8f68319 123 PathType FileBase::getPathType(void)
AnnaBridge 187:0387e8f68319 124 {
AnnaBridge 167:e84263d55307 125 // Constant read so no lock needed
AnnaBridge 167:e84263d55307 126 return _path_type;
AnnaBridge 167:e84263d55307 127 }
AnnaBridge 167:e84263d55307 128
AnnaBridge 167:e84263d55307 129 } // namespace mbed
AnnaBridge 167:e84263d55307 130