ON Semiconductor / mbed-os

5.2.1 - Updated I2C files

Dependents:   mbed-TFT-example-NCS36510 mbed-Accelerometer-example-NCS36510 mbed-Accelerometer-example-NCS36510

drivers/FileSystemLike.cpp@0:098463de4c5d, 2017-01-25 (annotated)

Committer:
group-onsemi
Date:
Wed Jan 25 20:34:15 2017 +0000
Revision:
0:098463de4c5d
Initial commit

Who changed what in which revision?

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group-onsemi 0:098463de4c5d 1 /* mbed Microcontroller Library
group-onsemi 0:098463de4c5d 2 * Copyright (c) 2006-2013 ARM Limited
group-onsemi 0:098463de4c5d 3 *
group-onsemi 0:098463de4c5d 4 * Licensed under the Apache License, Version 2.0 (the "License");
group-onsemi 0:098463de4c5d 5 * you may not use this file except in compliance with the License.
group-onsemi 0:098463de4c5d 6 * You may obtain a copy of the License at
group-onsemi 0:098463de4c5d 7 *
group-onsemi 0:098463de4c5d 8 * http://www.apache.org/licenses/LICENSE-2.0
group-onsemi 0:098463de4c5d 9 *
group-onsemi 0:098463de4c5d 10 * Unless required by applicable law or agreed to in writing, software
group-onsemi 0:098463de4c5d 11 * distributed under the License is distributed on an "AS IS" BASIS,
group-onsemi 0:098463de4c5d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
group-onsemi 0:098463de4c5d 13 * See the License for the specific language governing permissions and
group-onsemi 0:098463de4c5d 14 * limitations under the License.
group-onsemi 0:098463de4c5d 15 */
group-onsemi 0:098463de4c5d 16 #include "drivers/FileSystemLike.h"
group-onsemi 0:098463de4c5d 17
group-onsemi 0:098463de4c5d 18 namespace mbed {
group-onsemi 0:098463de4c5d 19
group-onsemi 0:098463de4c5d 20 class BaseDirHandle : public DirHandle {
group-onsemi 0:098463de4c5d 21 public:
group-onsemi 0:098463de4c5d 22 /*
group-onsemi 0:098463de4c5d 23 We keep track of our current location as the n'th object in the
group-onsemi 0:098463de4c5d 24 FileSystemLike list. Using a Base* instead would cause problems if that
group-onsemi 0:098463de4c5d 25 object were to be destroyed between readdirs.
group-onsemi 0:098463de4c5d 26 Using this method does mean though that destroying/creating objects can
group-onsemi 0:098463de4c5d 27 give unusual results from readdir.
group-onsemi 0:098463de4c5d 28 */
group-onsemi 0:098463de4c5d 29 off_t n;
group-onsemi 0:098463de4c5d 30 struct dirent cur_entry;
group-onsemi 0:098463de4c5d 31
group-onsemi 0:098463de4c5d 32 BaseDirHandle() : n(0), cur_entry() {
group-onsemi 0:098463de4c5d 33 }
group-onsemi 0:098463de4c5d 34
group-onsemi 0:098463de4c5d 35 virtual int closedir() {
group-onsemi 0:098463de4c5d 36 // No lock can be used in destructor
group-onsemi 0:098463de4c5d 37 delete this;
group-onsemi 0:098463de4c5d 38 return 0;
group-onsemi 0:098463de4c5d 39 }
group-onsemi 0:098463de4c5d 40
group-onsemi 0:098463de4c5d 41 virtual struct dirent *readdir() {
group-onsemi 0:098463de4c5d 42 lock();
group-onsemi 0:098463de4c5d 43 FileBase *ptr = FileBase::get(n);
group-onsemi 0:098463de4c5d 44 if (ptr == NULL) {
group-onsemi 0:098463de4c5d 45 unlock();
group-onsemi 0:098463de4c5d 46 return NULL;
group-onsemi 0:098463de4c5d 47 }
group-onsemi 0:098463de4c5d 48
group-onsemi 0:098463de4c5d 49 /* Increment n, so next readdir gets the next item */
group-onsemi 0:098463de4c5d 50 n++;
group-onsemi 0:098463de4c5d 51
group-onsemi 0:098463de4c5d 52 /* Setup cur entry and return a pointer to it */
group-onsemi 0:098463de4c5d 53 std::strncpy(cur_entry.d_name, ptr->getName(), NAME_MAX);
group-onsemi 0:098463de4c5d 54 unlock();
group-onsemi 0:098463de4c5d 55 return &cur_entry;
group-onsemi 0:098463de4c5d 56 }
group-onsemi 0:098463de4c5d 57
group-onsemi 0:098463de4c5d 58 virtual off_t telldir() {
group-onsemi 0:098463de4c5d 59 lock();
group-onsemi 0:098463de4c5d 60 off_t offset = n;
group-onsemi 0:098463de4c5d 61 unlock();
group-onsemi 0:098463de4c5d 62 return offset;
group-onsemi 0:098463de4c5d 63 }
group-onsemi 0:098463de4c5d 64
group-onsemi 0:098463de4c5d 65 virtual void seekdir(off_t offset) {
group-onsemi 0:098463de4c5d 66 lock();
group-onsemi 0:098463de4c5d 67 n = offset;
group-onsemi 0:098463de4c5d 68 unlock();
group-onsemi 0:098463de4c5d 69 }
group-onsemi 0:098463de4c5d 70
group-onsemi 0:098463de4c5d 71 virtual void rewinddir() {
group-onsemi 0:098463de4c5d 72 lock();
group-onsemi 0:098463de4c5d 73 n = 0;
group-onsemi 0:098463de4c5d 74 unlock();
group-onsemi 0:098463de4c5d 75 }
group-onsemi 0:098463de4c5d 76
group-onsemi 0:098463de4c5d 77 protected:
group-onsemi 0:098463de4c5d 78 PlatformMutex _mutex;
group-onsemi 0:098463de4c5d 79
group-onsemi 0:098463de4c5d 80 virtual void lock() {
group-onsemi 0:098463de4c5d 81 _mutex.lock();
group-onsemi 0:098463de4c5d 82 }
group-onsemi 0:098463de4c5d 83
group-onsemi 0:098463de4c5d 84 virtual void unlock() {
group-onsemi 0:098463de4c5d 85 _mutex.unlock();
group-onsemi 0:098463de4c5d 86 }
group-onsemi 0:098463de4c5d 87 };
group-onsemi 0:098463de4c5d 88
group-onsemi 0:098463de4c5d 89 FileSystemLike::FileSystemLike(const char *name) : FileBase(name, FileSystemPathType) {
group-onsemi 0:098463de4c5d 90
group-onsemi 0:098463de4c5d 91 }
group-onsemi 0:098463de4c5d 92
group-onsemi 0:098463de4c5d 93 FileSystemLike::~FileSystemLike() {
group-onsemi 0:098463de4c5d 94
group-onsemi 0:098463de4c5d 95 }
group-onsemi 0:098463de4c5d 96
group-onsemi 0:098463de4c5d 97 DirHandle *FileSystemLike::opendir() {
group-onsemi 0:098463de4c5d 98 return new BaseDirHandle();
group-onsemi 0:098463de4c5d 99 }
group-onsemi 0:098463de4c5d 100
group-onsemi 0:098463de4c5d 101 } // namespace mbed