Diff: drivers/FileBase.cpp

Revision:

149:156823d33999

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/drivers/FileBase.cpp	Fri Oct 28 11:17:30 2016 +0100
@@ -0,0 +1,97 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "drivers/FileBase.h"
+
+namespace mbed {
+
+FileBase *FileBase::_head = NULL;
+SingletonPtr<PlatformMutex> FileBase::_mutex;
+
+FileBase::FileBase(const char *name, PathType t) : _next(NULL),
+                                                   _name(name),
+                                                   _path_type(t) {
+    _mutex->lock();
+    if (name != NULL) {
+        // put this object at head of the list
+        _next = _head;
+        _head = this;
+    } else {
+        _next = NULL;
+    }
+    _mutex->unlock();
+}
+
+FileBase::~FileBase() {
+    _mutex->lock();
+    if (_name != NULL) {
+        // remove this object from the list
+        if (_head == this) { // first in the list, so just drop me
+            _head = _next;
+        } else {             // find the object before me, then drop me
+            FileBase *p = _head;
+            while (p->_next != this) {
+                p = p->_next;
+            }
+            p->_next = _next;
+        }
+    }
+    _mutex->unlock();
+}
+
+FileBase *FileBase::lookup(const char *name, unsigned int len) {
+    _mutex->lock();
+    FileBase *p = _head;
+    while (p != NULL) {
+        /* Check that p->_name matches name and is the correct length */
+        if (p->_name != NULL && std::strncmp(p->_name, name, len) == 0 && std::strlen(p->_name) == len) {
+            _mutex->unlock();
+            return p;
+        }
+        p = p->_next;
+    }
+    _mutex->unlock();
+    return NULL;
+}
+
+FileBase *FileBase::get(int n) {
+    _mutex->lock();
+    FileBase *p = _head;
+    int m = 0;
+    while (p != NULL) {
+        if (m == n) {
+            _mutex->unlock();
+            return p;
+        }
+
+        m++;
+        p = p->_next;
+    }
+    _mutex->unlock();
+    return NULL;
+}
+
+const char* FileBase::getName(void) {
+    // Constant read so no lock needed
+    return _name;
+}
+
+PathType FileBase::getPathType(void) {
+    // Constant read so no lock needed
+    return _path_type;
+}
+
+} // namespace mbed
+