MacroRat / MouseCode

Mouse code for the MacroRat

Dependencies:   ITG3200 QEI

mbed-dev/drivers/FileSystemLike.cpp@46:b156ef445742, 2017-06-03 (annotated)

Committer:
sahilmgandhi
Date:
Sat Jun 03 00:22:44 2017 +0000
Revision:
46:b156ef445742
Parent:
18:6a4db94011d3 
Final code for internal battlebot competition.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sahilmgandhi 18:6a4db94011d3 1 /* mbed Microcontroller Library
sahilmgandhi 18:6a4db94011d3 2 * Copyright (c) 2006-2013 ARM Limited
sahilmgandhi 18:6a4db94011d3 3 *
sahilmgandhi 18:6a4db94011d3 4 * Licensed under the Apache License, Version 2.0 (the "License");
sahilmgandhi 18:6a4db94011d3 5 * you may not use this file except in compliance with the License.
sahilmgandhi 18:6a4db94011d3 6 * You may obtain a copy of the License at
sahilmgandhi 18:6a4db94011d3 7 *
sahilmgandhi 18:6a4db94011d3 8 * http://www.apache.org/licenses/LICENSE-2.0
sahilmgandhi 18:6a4db94011d3 9 *
sahilmgandhi 18:6a4db94011d3 10 * Unless required by applicable law or agreed to in writing, software
sahilmgandhi 18:6a4db94011d3 11 * distributed under the License is distributed on an "AS IS" BASIS,
sahilmgandhi 18:6a4db94011d3 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
sahilmgandhi 18:6a4db94011d3 13 * See the License for the specific language governing permissions and
sahilmgandhi 18:6a4db94011d3 14 * limitations under the License.
sahilmgandhi 18:6a4db94011d3 15 */
sahilmgandhi 18:6a4db94011d3 16 #include "drivers/FileSystemLike.h"
sahilmgandhi 18:6a4db94011d3 17
sahilmgandhi 18:6a4db94011d3 18 namespace mbed {
sahilmgandhi 18:6a4db94011d3 19
sahilmgandhi 18:6a4db94011d3 20 class BaseDirHandle : public DirHandle {
sahilmgandhi 18:6a4db94011d3 21 public:
sahilmgandhi 18:6a4db94011d3 22 /*
sahilmgandhi 18:6a4db94011d3 23 We keep track of our current location as the n'th object in the
sahilmgandhi 18:6a4db94011d3 24 FileSystemLike list. Using a Base* instead would cause problems if that
sahilmgandhi 18:6a4db94011d3 25 object were to be destroyed between readdirs.
sahilmgandhi 18:6a4db94011d3 26 Using this method does mean though that destroying/creating objects can
sahilmgandhi 18:6a4db94011d3 27 give unusual results from readdir.
sahilmgandhi 18:6a4db94011d3 28 */
sahilmgandhi 18:6a4db94011d3 29 off_t n;
sahilmgandhi 18:6a4db94011d3 30 struct dirent cur_entry;
sahilmgandhi 18:6a4db94011d3 31
sahilmgandhi 18:6a4db94011d3 32 BaseDirHandle() : DirHandle(0), n(0), cur_entry() {
sahilmgandhi 18:6a4db94011d3 33 }
sahilmgandhi 18:6a4db94011d3 34
sahilmgandhi 18:6a4db94011d3 35 virtual int closedir() {
sahilmgandhi 18:6a4db94011d3 36 // No lock can be used in destructor
sahilmgandhi 18:6a4db94011d3 37 delete this;
sahilmgandhi 18:6a4db94011d3 38 return 0;
sahilmgandhi 18:6a4db94011d3 39 }
sahilmgandhi 18:6a4db94011d3 40
sahilmgandhi 18:6a4db94011d3 41 virtual struct dirent *readdir() {
sahilmgandhi 18:6a4db94011d3 42 lock();
sahilmgandhi 18:6a4db94011d3 43 FileBase *ptr = FileBase::get(n);
sahilmgandhi 18:6a4db94011d3 44 if (ptr == NULL) {
sahilmgandhi 18:6a4db94011d3 45 unlock();
sahilmgandhi 18:6a4db94011d3 46 return NULL;
sahilmgandhi 18:6a4db94011d3 47 }
sahilmgandhi 18:6a4db94011d3 48
sahilmgandhi 18:6a4db94011d3 49 /* Increment n, so next readdir gets the next item */
sahilmgandhi 18:6a4db94011d3 50 n++;
sahilmgandhi 18:6a4db94011d3 51
sahilmgandhi 18:6a4db94011d3 52 /* Setup cur entry and return a pointer to it */
sahilmgandhi 18:6a4db94011d3 53 std::strncpy(cur_entry.d_name, ptr->getName(), NAME_MAX);
sahilmgandhi 18:6a4db94011d3 54 unlock();
sahilmgandhi 18:6a4db94011d3 55 return &cur_entry;
sahilmgandhi 18:6a4db94011d3 56 }
sahilmgandhi 18:6a4db94011d3 57
sahilmgandhi 18:6a4db94011d3 58 virtual off_t telldir() {
sahilmgandhi 18:6a4db94011d3 59 lock();
sahilmgandhi 18:6a4db94011d3 60 off_t offset = n;
sahilmgandhi 18:6a4db94011d3 61 unlock();
sahilmgandhi 18:6a4db94011d3 62 return offset;
sahilmgandhi 18:6a4db94011d3 63 }
sahilmgandhi 18:6a4db94011d3 64
sahilmgandhi 18:6a4db94011d3 65 virtual void seekdir(off_t offset) {
sahilmgandhi 18:6a4db94011d3 66 lock();
sahilmgandhi 18:6a4db94011d3 67 n = offset;
sahilmgandhi 18:6a4db94011d3 68 unlock();
sahilmgandhi 18:6a4db94011d3 69 }
sahilmgandhi 18:6a4db94011d3 70
sahilmgandhi 18:6a4db94011d3 71 virtual void rewinddir() {
sahilmgandhi 18:6a4db94011d3 72 lock();
sahilmgandhi 18:6a4db94011d3 73 n = 0;
sahilmgandhi 18:6a4db94011d3 74 unlock();
sahilmgandhi 18:6a4db94011d3 75 }
sahilmgandhi 18:6a4db94011d3 76
sahilmgandhi 18:6a4db94011d3 77 protected:
sahilmgandhi 18:6a4db94011d3 78 PlatformMutex _mutex;
sahilmgandhi 18:6a4db94011d3 79
sahilmgandhi 18:6a4db94011d3 80 virtual void lock() {
sahilmgandhi 18:6a4db94011d3 81 _mutex.lock();
sahilmgandhi 18:6a4db94011d3 82 }
sahilmgandhi 18:6a4db94011d3 83
sahilmgandhi 18:6a4db94011d3 84 virtual void unlock() {
sahilmgandhi 18:6a4db94011d3 85 _mutex.unlock();
sahilmgandhi 18:6a4db94011d3 86 }
sahilmgandhi 18:6a4db94011d3 87 };
sahilmgandhi 18:6a4db94011d3 88
sahilmgandhi 18:6a4db94011d3 89 FileSystemLike::FileSystemLike(const char *name) : FileBase(name, FileSystemPathType) {
sahilmgandhi 18:6a4db94011d3 90
sahilmgandhi 18:6a4db94011d3 91 }
sahilmgandhi 18:6a4db94011d3 92
sahilmgandhi 18:6a4db94011d3 93 FileSystemLike::~FileSystemLike() {
sahilmgandhi 18:6a4db94011d3 94
sahilmgandhi 18:6a4db94011d3 95 }
sahilmgandhi 18:6a4db94011d3 96
sahilmgandhi 18:6a4db94011d3 97 DirHandle *FileSystemLike::opendir() {
sahilmgandhi 18:6a4db94011d3 98 return new BaseDirHandle();
sahilmgandhi 18:6a4db94011d3 99 }
sahilmgandhi 18:6a4db94011d3 100
sahilmgandhi 18:6a4db94011d3 101 } // namespace mbed