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@188:bcfe06ba3d64, 2018-11-08 (annotated)

Committer:
AnnaBridge
Date:
Thu Nov 08 11:46:34 2018 +0000
Revision:
188:bcfe06ba3d64
Parent:
187:0387e8f68319
Child:
189:f392fc9709a3
mbed-dev library. Release version 164

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