001
platform/FileBase.cpp@0:13413ea9a877, 2022-06-12 (annotated)
- Committer:
- ganlikun
- Date:
- Sun Jun 12 14:02:44 2022 +0000
- Revision:
- 0:13413ea9a877
00
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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ganlikun | 0:13413ea9a877 | 1 | /* mbed Microcontroller Library |
ganlikun | 0:13413ea9a877 | 2 | * Copyright (c) 2006-2013 ARM Limited |
ganlikun | 0:13413ea9a877 | 3 | * |
ganlikun | 0:13413ea9a877 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
ganlikun | 0:13413ea9a877 | 5 | * you may not use this file except in compliance with the License. |
ganlikun | 0:13413ea9a877 | 6 | * You may obtain a copy of the License at |
ganlikun | 0:13413ea9a877 | 7 | * |
ganlikun | 0:13413ea9a877 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
ganlikun | 0:13413ea9a877 | 9 | * |
ganlikun | 0:13413ea9a877 | 10 | * Unless required by applicable law or agreed to in writing, software |
ganlikun | 0:13413ea9a877 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
ganlikun | 0:13413ea9a877 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
ganlikun | 0:13413ea9a877 | 13 | * See the License for the specific language governing permissions and |
ganlikun | 0:13413ea9a877 | 14 | * limitations under the License. |
ganlikun | 0:13413ea9a877 | 15 | */ |
ganlikun | 0:13413ea9a877 | 16 | #include "platform/FileBase.h" |
ganlikun | 0:13413ea9a877 | 17 | #include "platform/FileLike.h" |
ganlikun | 0:13413ea9a877 | 18 | #include "platform/FileHandle.h" |
ganlikun | 0:13413ea9a877 | 19 | |
ganlikun | 0:13413ea9a877 | 20 | namespace mbed { |
ganlikun | 0:13413ea9a877 | 21 | |
ganlikun | 0:13413ea9a877 | 22 | FileBase *FileBase::_head = NULL; |
ganlikun | 0:13413ea9a877 | 23 | SingletonPtr<PlatformMutex> FileBase::_mutex; |
ganlikun | 0:13413ea9a877 | 24 | |
ganlikun | 0:13413ea9a877 | 25 | FileBase::FileBase(const char *name, PathType t) : _next(NULL), |
ganlikun | 0:13413ea9a877 | 26 | _name(name), |
ganlikun | 0:13413ea9a877 | 27 | _path_type(t) { |
ganlikun | 0:13413ea9a877 | 28 | _mutex->lock(); |
ganlikun | 0:13413ea9a877 | 29 | if (name != NULL) { |
ganlikun | 0:13413ea9a877 | 30 | // put this object at head of the list |
ganlikun | 0:13413ea9a877 | 31 | _next = _head; |
ganlikun | 0:13413ea9a877 | 32 | _head = this; |
ganlikun | 0:13413ea9a877 | 33 | } else { |
ganlikun | 0:13413ea9a877 | 34 | _next = NULL; |
ganlikun | 0:13413ea9a877 | 35 | } |
ganlikun | 0:13413ea9a877 | 36 | _mutex->unlock(); |
ganlikun | 0:13413ea9a877 | 37 | } |
ganlikun | 0:13413ea9a877 | 38 | |
ganlikun | 0:13413ea9a877 | 39 | FileBase::~FileBase() { |
ganlikun | 0:13413ea9a877 | 40 | _mutex->lock(); |
ganlikun | 0:13413ea9a877 | 41 | if (_name != NULL) { |
ganlikun | 0:13413ea9a877 | 42 | // remove this object from the list |
ganlikun | 0:13413ea9a877 | 43 | if (_head == this) { // first in the list, so just drop me |
ganlikun | 0:13413ea9a877 | 44 | _head = _next; |
ganlikun | 0:13413ea9a877 | 45 | } else { // find the object before me, then drop me |
ganlikun | 0:13413ea9a877 | 46 | FileBase *p = _head; |
ganlikun | 0:13413ea9a877 | 47 | while (p->_next != this) { |
ganlikun | 0:13413ea9a877 | 48 | p = p->_next; |
ganlikun | 0:13413ea9a877 | 49 | } |
ganlikun | 0:13413ea9a877 | 50 | p->_next = _next; |
ganlikun | 0:13413ea9a877 | 51 | } |
ganlikun | 0:13413ea9a877 | 52 | } |
ganlikun | 0:13413ea9a877 | 53 | _mutex->unlock(); |
ganlikun | 0:13413ea9a877 | 54 | |
ganlikun | 0:13413ea9a877 | 55 | if (getPathType() == FilePathType) { |
ganlikun | 0:13413ea9a877 | 56 | extern void remove_filehandle(FileHandle *file); |
ganlikun | 0:13413ea9a877 | 57 | remove_filehandle(static_cast<FileHandle*>(static_cast<FileLike*>(this))); |
ganlikun | 0:13413ea9a877 | 58 | } |
ganlikun | 0:13413ea9a877 | 59 | } |
ganlikun | 0:13413ea9a877 | 60 | |
ganlikun | 0:13413ea9a877 | 61 | FileBase *FileBase::lookup(const char *name, unsigned int len) { |
ganlikun | 0:13413ea9a877 | 62 | _mutex->lock(); |
ganlikun | 0:13413ea9a877 | 63 | FileBase *p = _head; |
ganlikun | 0:13413ea9a877 | 64 | while (p != NULL) { |
ganlikun | 0:13413ea9a877 | 65 | /* Check that p->_name matches name and is the correct length */ |
ganlikun | 0:13413ea9a877 | 66 | if (p->_name != NULL && std::strncmp(p->_name, name, len) == 0 && std::strlen(p->_name) == len) { |
ganlikun | 0:13413ea9a877 | 67 | _mutex->unlock(); |
ganlikun | 0:13413ea9a877 | 68 | return p; |
ganlikun | 0:13413ea9a877 | 69 | } |
ganlikun | 0:13413ea9a877 | 70 | p = p->_next; |
ganlikun | 0:13413ea9a877 | 71 | } |
ganlikun | 0:13413ea9a877 | 72 | _mutex->unlock(); |
ganlikun | 0:13413ea9a877 | 73 | return NULL; |
ganlikun | 0:13413ea9a877 | 74 | } |
ganlikun | 0:13413ea9a877 | 75 | |
ganlikun | 0:13413ea9a877 | 76 | FileBase *FileBase::get(int n) { |
ganlikun | 0:13413ea9a877 | 77 | _mutex->lock(); |
ganlikun | 0:13413ea9a877 | 78 | FileBase *p = _head; |
ganlikun | 0:13413ea9a877 | 79 | int m = 0; |
ganlikun | 0:13413ea9a877 | 80 | while (p != NULL) { |
ganlikun | 0:13413ea9a877 | 81 | if (m == n) { |
ganlikun | 0:13413ea9a877 | 82 | _mutex->unlock(); |
ganlikun | 0:13413ea9a877 | 83 | return p; |
ganlikun | 0:13413ea9a877 | 84 | } |
ganlikun | 0:13413ea9a877 | 85 | |
ganlikun | 0:13413ea9a877 | 86 | m++; |
ganlikun | 0:13413ea9a877 | 87 | p = p->_next; |
ganlikun | 0:13413ea9a877 | 88 | } |
ganlikun | 0:13413ea9a877 | 89 | _mutex->unlock(); |
ganlikun | 0:13413ea9a877 | 90 | return NULL; |
ganlikun | 0:13413ea9a877 | 91 | } |
ganlikun | 0:13413ea9a877 | 92 | |
ganlikun | 0:13413ea9a877 | 93 | const char* FileBase::getName(void) { |
ganlikun | 0:13413ea9a877 | 94 | // Constant read so no lock needed |
ganlikun | 0:13413ea9a877 | 95 | return _name; |
ganlikun | 0:13413ea9a877 | 96 | } |
ganlikun | 0:13413ea9a877 | 97 | |
ganlikun | 0:13413ea9a877 | 98 | PathType FileBase::getPathType(void) { |
ganlikun | 0:13413ea9a877 | 99 | // Constant read so no lock needed |
ganlikun | 0:13413ea9a877 | 100 | return _path_type; |
ganlikun | 0:13413ea9a877 | 101 | } |
ganlikun | 0:13413ea9a877 | 102 | |
ganlikun | 0:13413ea9a877 | 103 | } // namespace mbed |
ganlikun | 0:13413ea9a877 | 104 | |
ganlikun | 0:13413ea9a877 | 105 |