Thomas Lyp / DevLibMemoryController

Initial commit

Dependencies:   FastPWM

mbed-dev-master/platform/FileBase.cpp@0:bb348c97df44, 2020-09-16 (annotated)

Committer:
lypinator
Date:
Wed Sep 16 01:11:49 2020 +0000
Revision:
0:bb348c97df44
Added PWM

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lypinator 0:bb348c97df44 1 /* mbed Microcontroller Library
lypinator 0:bb348c97df44 2 * Copyright (c) 2006-2013 ARM Limited
lypinator 0:bb348c97df44 3 *
lypinator 0:bb348c97df44 4 * Licensed under the Apache License, Version 2.0 (the "License");
lypinator 0:bb348c97df44 5 * you may not use this file except in compliance with the License.
lypinator 0:bb348c97df44 6 * You may obtain a copy of the License at
lypinator 0:bb348c97df44 7 *
lypinator 0:bb348c97df44 8 * http://www.apache.org/licenses/LICENSE-2.0
lypinator 0:bb348c97df44 9 *
lypinator 0:bb348c97df44 10 * Unless required by applicable law or agreed to in writing, software
lypinator 0:bb348c97df44 11 * distributed under the License is distributed on an "AS IS" BASIS,
lypinator 0:bb348c97df44 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
lypinator 0:bb348c97df44 13 * See the License for the specific language governing permissions and
lypinator 0:bb348c97df44 14 * limitations under the License.
lypinator 0:bb348c97df44 15 */
lypinator 0:bb348c97df44 16 #include "platform/FileBase.h"
lypinator 0:bb348c97df44 17 #include "platform/FileLike.h"
lypinator 0:bb348c97df44 18 #include "platform/FileHandle.h"
lypinator 0:bb348c97df44 19
lypinator 0:bb348c97df44 20 namespace mbed {
lypinator 0:bb348c97df44 21
lypinator 0:bb348c97df44 22 FileBase *FileBase::_head = NULL;
lypinator 0:bb348c97df44 23 SingletonPtr<PlatformMutex> FileBase::_mutex;
lypinator 0:bb348c97df44 24
lypinator 0:bb348c97df44 25 FileBase::FileBase(const char *name, PathType t) : _next(NULL),
lypinator 0:bb348c97df44 26 _name(name),
lypinator 0:bb348c97df44 27 _path_type(t)
lypinator 0:bb348c97df44 28 {
lypinator 0:bb348c97df44 29 _mutex->lock();
lypinator 0:bb348c97df44 30 if (name != NULL) {
lypinator 0:bb348c97df44 31 // put this object at head of the list
lypinator 0:bb348c97df44 32 _next = _head;
lypinator 0:bb348c97df44 33 _head = this;
lypinator 0:bb348c97df44 34 } else {
lypinator 0:bb348c97df44 35 _next = NULL;
lypinator 0:bb348c97df44 36 }
lypinator 0:bb348c97df44 37 _mutex->unlock();
lypinator 0:bb348c97df44 38 }
lypinator 0:bb348c97df44 39
lypinator 0:bb348c97df44 40 FileBase::~FileBase()
lypinator 0:bb348c97df44 41 {
lypinator 0:bb348c97df44 42 _mutex->lock();
lypinator 0:bb348c97df44 43 if (_name != NULL) {
lypinator 0:bb348c97df44 44 // remove this object from the list
lypinator 0:bb348c97df44 45 if (_head == this) { // first in the list, so just drop me
lypinator 0:bb348c97df44 46 _head = _next;
lypinator 0:bb348c97df44 47 } else { // find the object before me, then drop me
lypinator 0:bb348c97df44 48 FileBase *p = _head;
lypinator 0:bb348c97df44 49 while (p->_next != this) {
lypinator 0:bb348c97df44 50 p = p->_next;
lypinator 0:bb348c97df44 51 }
lypinator 0:bb348c97df44 52 p->_next = _next;
lypinator 0:bb348c97df44 53 }
lypinator 0:bb348c97df44 54 }
lypinator 0:bb348c97df44 55 _mutex->unlock();
lypinator 0:bb348c97df44 56
lypinator 0:bb348c97df44 57 if (getPathType() == FilePathType) {
lypinator 0:bb348c97df44 58 extern void remove_filehandle(FileHandle * file);
lypinator 0:bb348c97df44 59 remove_filehandle(static_cast<FileHandle *>(static_cast<FileLike *>(this)));
lypinator 0:bb348c97df44 60 }
lypinator 0:bb348c97df44 61 }
lypinator 0:bb348c97df44 62
lypinator 0:bb348c97df44 63 FileBase *FileBase::lookup(const char *name, unsigned int len)
lypinator 0:bb348c97df44 64 {
lypinator 0:bb348c97df44 65 _mutex->lock();
lypinator 0:bb348c97df44 66 FileBase *p = _head;
lypinator 0:bb348c97df44 67 while (p != NULL) {
lypinator 0:bb348c97df44 68 /* Check that p->_name matches name and is the correct length */
lypinator 0:bb348c97df44 69 if (p->_name != NULL && std::strncmp(p->_name, name, len) == 0 && std::strlen(p->_name) == len) {
lypinator 0:bb348c97df44 70 _mutex->unlock();
lypinator 0:bb348c97df44 71 return p;
lypinator 0:bb348c97df44 72 }
lypinator 0:bb348c97df44 73 p = p->_next;
lypinator 0:bb348c97df44 74 }
lypinator 0:bb348c97df44 75 _mutex->unlock();
lypinator 0:bb348c97df44 76 return NULL;
lypinator 0:bb348c97df44 77 }
lypinator 0:bb348c97df44 78
lypinator 0:bb348c97df44 79 FileBase *FileBase::get(int n)
lypinator 0:bb348c97df44 80 {
lypinator 0:bb348c97df44 81 _mutex->lock();
lypinator 0:bb348c97df44 82 FileBase *p = _head;
lypinator 0:bb348c97df44 83 int m = 0;
lypinator 0:bb348c97df44 84 while (p != NULL) {
lypinator 0:bb348c97df44 85 if (m == n) {
lypinator 0:bb348c97df44 86 _mutex->unlock();
lypinator 0:bb348c97df44 87 return p;
lypinator 0:bb348c97df44 88 }
lypinator 0:bb348c97df44 89
lypinator 0:bb348c97df44 90 m++;
lypinator 0:bb348c97df44 91 p = p->_next;
lypinator 0:bb348c97df44 92 }
lypinator 0:bb348c97df44 93 _mutex->unlock();
lypinator 0:bb348c97df44 94 return NULL;
lypinator 0:bb348c97df44 95 }
lypinator 0:bb348c97df44 96
lypinator 0:bb348c97df44 97 const char *FileBase::getName(void)
lypinator 0:bb348c97df44 98 {
lypinator 0:bb348c97df44 99 // Constant read so no lock needed
lypinator 0:bb348c97df44 100 return _name;
lypinator 0:bb348c97df44 101 }
lypinator 0:bb348c97df44 102
lypinator 0:bb348c97df44 103 PathType FileBase::getPathType(void)
lypinator 0:bb348c97df44 104 {
lypinator 0:bb348c97df44 105 // Constant read so no lock needed
lypinator 0:bb348c97df44 106 return _path_type;
lypinator 0:bb348c97df44 107 }
lypinator 0:bb348c97df44 108
lypinator 0:bb348c97df44 109 } // namespace mbed
lypinator 0:bb348c97df44 110