Damian Gabino / picoGW_mcu

MCU driver/HAL for the Picocell Gateway concentrator board. The firmware implements either a USB CDC protocol or a UART protocol to bridge commands coming from host to the SX1308 SPI interface.

src/mbed-dev/common/FileSystemLike.cpp@0:c76361bd82e8, 2018-04-11 (annotated)

Committer:
dgabino
Date:
Wed Apr 11 14:42:47 2018 +0000
Revision:
0:c76361bd82e8
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dgabino 0:c76361bd82e8 1 /* mbed Microcontroller Library
dgabino 0:c76361bd82e8 2 * Copyright (c) 2006-2013 ARM Limited
dgabino 0:c76361bd82e8 3 *
dgabino 0:c76361bd82e8 4 * Licensed under the Apache License, Version 2.0 (the "License");
dgabino 0:c76361bd82e8 5 * you may not use this file except in compliance with the License.
dgabino 0:c76361bd82e8 6 * You may obtain a copy of the License at
dgabino 0:c76361bd82e8 7 *
dgabino 0:c76361bd82e8 8 * http://www.apache.org/licenses/LICENSE-2.0
dgabino 0:c76361bd82e8 9 *
dgabino 0:c76361bd82e8 10 * Unless required by applicable law or agreed to in writing, software
dgabino 0:c76361bd82e8 11 * distributed under the License is distributed on an "AS IS" BASIS,
dgabino 0:c76361bd82e8 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
dgabino 0:c76361bd82e8 13 * See the License for the specific language governing permissions and
dgabino 0:c76361bd82e8 14 * limitations under the License.
dgabino 0:c76361bd82e8 15 */
dgabino 0:c76361bd82e8 16 #include "FileSystemLike.h"
dgabino 0:c76361bd82e8 17
dgabino 0:c76361bd82e8 18 namespace mbed {
dgabino 0:c76361bd82e8 19
dgabino 0:c76361bd82e8 20 class BaseDirHandle : public DirHandle {
dgabino 0:c76361bd82e8 21 public:
dgabino 0:c76361bd82e8 22 /*
dgabino 0:c76361bd82e8 23 We keep track of our current location as the n'th object in the
dgabino 0:c76361bd82e8 24 FileSystemLike list. Using a Base* instead would cause problems if that
dgabino 0:c76361bd82e8 25 object were to be destroyed between readdirs.
dgabino 0:c76361bd82e8 26 Using this method does mean though that destroying/creating objects can
dgabino 0:c76361bd82e8 27 give unusual results from readdir.
dgabino 0:c76361bd82e8 28 */
dgabino 0:c76361bd82e8 29 off_t n;
dgabino 0:c76361bd82e8 30 struct dirent cur_entry;
dgabino 0:c76361bd82e8 31
dgabino 0:c76361bd82e8 32 BaseDirHandle() : n(0), cur_entry() {
dgabino 0:c76361bd82e8 33 }
dgabino 0:c76361bd82e8 34
dgabino 0:c76361bd82e8 35 virtual int closedir() {
dgabino 0:c76361bd82e8 36 // No lock can be used in destructor
dgabino 0:c76361bd82e8 37 delete this;
dgabino 0:c76361bd82e8 38 return 0;
dgabino 0:c76361bd82e8 39 }
dgabino 0:c76361bd82e8 40
dgabino 0:c76361bd82e8 41 virtual struct dirent *readdir() {
dgabino 0:c76361bd82e8 42 lock();
dgabino 0:c76361bd82e8 43 FileBase *ptr = FileBase::get(n);
dgabino 0:c76361bd82e8 44 if (ptr == NULL) {
dgabino 0:c76361bd82e8 45 unlock();
dgabino 0:c76361bd82e8 46 return NULL;
dgabino 0:c76361bd82e8 47 }
dgabino 0:c76361bd82e8 48
dgabino 0:c76361bd82e8 49 /* Increment n, so next readdir gets the next item */
dgabino 0:c76361bd82e8 50 n++;
dgabino 0:c76361bd82e8 51
dgabino 0:c76361bd82e8 52 /* Setup cur entry and return a pointer to it */
dgabino 0:c76361bd82e8 53 std::strncpy(cur_entry.d_name, ptr->getName(), NAME_MAX);
dgabino 0:c76361bd82e8 54 unlock();
dgabino 0:c76361bd82e8 55 return &cur_entry;
dgabino 0:c76361bd82e8 56 }
dgabino 0:c76361bd82e8 57
dgabino 0:c76361bd82e8 58 virtual off_t telldir() {
dgabino 0:c76361bd82e8 59 lock();
dgabino 0:c76361bd82e8 60 off_t offset = n;
dgabino 0:c76361bd82e8 61 unlock();
dgabino 0:c76361bd82e8 62 return offset;
dgabino 0:c76361bd82e8 63 }
dgabino 0:c76361bd82e8 64
dgabino 0:c76361bd82e8 65 virtual void seekdir(off_t offset) {
dgabino 0:c76361bd82e8 66 lock();
dgabino 0:c76361bd82e8 67 n = offset;
dgabino 0:c76361bd82e8 68 unlock();
dgabino 0:c76361bd82e8 69 }
dgabino 0:c76361bd82e8 70
dgabino 0:c76361bd82e8 71 virtual void rewinddir() {
dgabino 0:c76361bd82e8 72 lock();
dgabino 0:c76361bd82e8 73 n = 0;
dgabino 0:c76361bd82e8 74 unlock();
dgabino 0:c76361bd82e8 75 }
dgabino 0:c76361bd82e8 76
dgabino 0:c76361bd82e8 77 protected:
dgabino 0:c76361bd82e8 78 PlatformMutex _mutex;
dgabino 0:c76361bd82e8 79
dgabino 0:c76361bd82e8 80 virtual void lock() {
dgabino 0:c76361bd82e8 81 _mutex.lock();
dgabino 0:c76361bd82e8 82 }
dgabino 0:c76361bd82e8 83
dgabino 0:c76361bd82e8 84 virtual void unlock() {
dgabino 0:c76361bd82e8 85 _mutex.unlock();
dgabino 0:c76361bd82e8 86 }
dgabino 0:c76361bd82e8 87 };
dgabino 0:c76361bd82e8 88
dgabino 0:c76361bd82e8 89 FileSystemLike::FileSystemLike(const char *name) : FileBase(name, FileSystemPathType) {
dgabino 0:c76361bd82e8 90
dgabino 0:c76361bd82e8 91 }
dgabino 0:c76361bd82e8 92
dgabino 0:c76361bd82e8 93 FileSystemLike::~FileSystemLike() {
dgabino 0:c76361bd82e8 94
dgabino 0:c76361bd82e8 95 }
dgabino 0:c76361bd82e8 96
dgabino 0:c76361bd82e8 97 DirHandle *FileSystemLike::opendir() {
dgabino 0:c76361bd82e8 98 return new BaseDirHandle();
dgabino 0:c76361bd82e8 99 }
dgabino 0:c76361bd82e8 100
dgabino 0:c76361bd82e8 101 } // namespace mbed