Includes library modifications to allow access to AIN_4 (AIN_0 / 5)

Committer:
bryantaylor
Date:
Tue Sep 20 21:26:12 2016 +0000
Revision:
0:eafc3fd41f75
hackathon

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bryantaylor 0:eafc3fd41f75 1 /* mbed Microcontroller Library
bryantaylor 0:eafc3fd41f75 2 * Copyright (c) 2006-2013 ARM Limited
bryantaylor 0:eafc3fd41f75 3 *
bryantaylor 0:eafc3fd41f75 4 * Licensed under the Apache License, Version 2.0 (the "License");
bryantaylor 0:eafc3fd41f75 5 * you may not use this file except in compliance with the License.
bryantaylor 0:eafc3fd41f75 6 * You may obtain a copy of the License at
bryantaylor 0:eafc3fd41f75 7 *
bryantaylor 0:eafc3fd41f75 8 * http://www.apache.org/licenses/LICENSE-2.0
bryantaylor 0:eafc3fd41f75 9 *
bryantaylor 0:eafc3fd41f75 10 * Unless required by applicable law or agreed to in writing, software
bryantaylor 0:eafc3fd41f75 11 * distributed under the License is distributed on an "AS IS" BASIS,
bryantaylor 0:eafc3fd41f75 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bryantaylor 0:eafc3fd41f75 13 * See the License for the specific language governing permissions and
bryantaylor 0:eafc3fd41f75 14 * limitations under the License.
bryantaylor 0:eafc3fd41f75 15 */
bryantaylor 0:eafc3fd41f75 16 #include "FileSystemLike.h"
bryantaylor 0:eafc3fd41f75 17
bryantaylor 0:eafc3fd41f75 18 namespace mbed {
bryantaylor 0:eafc3fd41f75 19
bryantaylor 0:eafc3fd41f75 20 class BaseDirHandle : public DirHandle {
bryantaylor 0:eafc3fd41f75 21 public:
bryantaylor 0:eafc3fd41f75 22 /*
bryantaylor 0:eafc3fd41f75 23 We keep track of our current location as the n'th object in the
bryantaylor 0:eafc3fd41f75 24 FileSystemLike list. Using a Base* instead would cause problems if that
bryantaylor 0:eafc3fd41f75 25 object were to be destroyed between readdirs.
bryantaylor 0:eafc3fd41f75 26 Using this method does mean though that destroying/creating objects can
bryantaylor 0:eafc3fd41f75 27 give unusual results from readdir.
bryantaylor 0:eafc3fd41f75 28 */
bryantaylor 0:eafc3fd41f75 29 off_t n;
bryantaylor 0:eafc3fd41f75 30 struct dirent cur_entry;
bryantaylor 0:eafc3fd41f75 31
bryantaylor 0:eafc3fd41f75 32 BaseDirHandle() : n(0), cur_entry() {
bryantaylor 0:eafc3fd41f75 33 }
bryantaylor 0:eafc3fd41f75 34
bryantaylor 0:eafc3fd41f75 35 virtual int closedir() {
bryantaylor 0:eafc3fd41f75 36 // No lock can be used in destructor
bryantaylor 0:eafc3fd41f75 37 delete this;
bryantaylor 0:eafc3fd41f75 38 return 0;
bryantaylor 0:eafc3fd41f75 39 }
bryantaylor 0:eafc3fd41f75 40
bryantaylor 0:eafc3fd41f75 41 virtual struct dirent *readdir() {
bryantaylor 0:eafc3fd41f75 42 lock();
bryantaylor 0:eafc3fd41f75 43 FileBase *ptr = FileBase::get(n);
bryantaylor 0:eafc3fd41f75 44 if (ptr == NULL) {
bryantaylor 0:eafc3fd41f75 45 unlock();
bryantaylor 0:eafc3fd41f75 46 return NULL;
bryantaylor 0:eafc3fd41f75 47 }
bryantaylor 0:eafc3fd41f75 48
bryantaylor 0:eafc3fd41f75 49 /* Increment n, so next readdir gets the next item */
bryantaylor 0:eafc3fd41f75 50 n++;
bryantaylor 0:eafc3fd41f75 51
bryantaylor 0:eafc3fd41f75 52 /* Setup cur entry and return a pointer to it */
bryantaylor 0:eafc3fd41f75 53 std::strncpy(cur_entry.d_name, ptr->getName(), NAME_MAX);
bryantaylor 0:eafc3fd41f75 54 unlock();
bryantaylor 0:eafc3fd41f75 55 return &cur_entry;
bryantaylor 0:eafc3fd41f75 56 }
bryantaylor 0:eafc3fd41f75 57
bryantaylor 0:eafc3fd41f75 58 virtual off_t telldir() {
bryantaylor 0:eafc3fd41f75 59 lock();
bryantaylor 0:eafc3fd41f75 60 off_t offset = n;
bryantaylor 0:eafc3fd41f75 61 unlock();
bryantaylor 0:eafc3fd41f75 62 return offset;
bryantaylor 0:eafc3fd41f75 63 }
bryantaylor 0:eafc3fd41f75 64
bryantaylor 0:eafc3fd41f75 65 virtual void seekdir(off_t offset) {
bryantaylor 0:eafc3fd41f75 66 lock();
bryantaylor 0:eafc3fd41f75 67 n = offset;
bryantaylor 0:eafc3fd41f75 68 unlock();
bryantaylor 0:eafc3fd41f75 69 }
bryantaylor 0:eafc3fd41f75 70
bryantaylor 0:eafc3fd41f75 71 virtual void rewinddir() {
bryantaylor 0:eafc3fd41f75 72 lock();
bryantaylor 0:eafc3fd41f75 73 n = 0;
bryantaylor 0:eafc3fd41f75 74 unlock();
bryantaylor 0:eafc3fd41f75 75 }
bryantaylor 0:eafc3fd41f75 76
bryantaylor 0:eafc3fd41f75 77 protected:
bryantaylor 0:eafc3fd41f75 78 PlatformMutex _mutex;
bryantaylor 0:eafc3fd41f75 79
bryantaylor 0:eafc3fd41f75 80 virtual void lock() {
bryantaylor 0:eafc3fd41f75 81 _mutex.lock();
bryantaylor 0:eafc3fd41f75 82 }
bryantaylor 0:eafc3fd41f75 83
bryantaylor 0:eafc3fd41f75 84 virtual void unlock() {
bryantaylor 0:eafc3fd41f75 85 _mutex.unlock();
bryantaylor 0:eafc3fd41f75 86 }
bryantaylor 0:eafc3fd41f75 87 };
bryantaylor 0:eafc3fd41f75 88
bryantaylor 0:eafc3fd41f75 89 FileSystemLike::FileSystemLike(const char *name) : FileBase(name, FileSystemPathType) {
bryantaylor 0:eafc3fd41f75 90
bryantaylor 0:eafc3fd41f75 91 }
bryantaylor 0:eafc3fd41f75 92
bryantaylor 0:eafc3fd41f75 93 FileSystemLike::~FileSystemLike() {
bryantaylor 0:eafc3fd41f75 94
bryantaylor 0:eafc3fd41f75 95 }
bryantaylor 0:eafc3fd41f75 96
bryantaylor 0:eafc3fd41f75 97 DirHandle *FileSystemLike::opendir() {
bryantaylor 0:eafc3fd41f75 98 return new BaseDirHandle();
bryantaylor 0:eafc3fd41f75 99 }
bryantaylor 0:eafc3fd41f75 100
bryantaylor 0:eafc3fd41f75 101 } // namespace mbed