Diff: platform/source/FileBase.cpp

Revision:

1:9db0e321a9f4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/platform/source/FileBase.cpp	Tue Dec 31 06:02:27 2019 +0000
@@ -0,0 +1,129 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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 <cstring>
+
+#include "platform/FileBase.h"
+#include "platform/FileLike.h"
+#include "platform/FileHandle.h"
+
+namespace mbed {
+
+FileBase *FileBase::_head = NULL;
+SingletonPtr<PlatformMutex> FileBase::_mutex;
+FileBase *FileBase::_default = NULL;
+
+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;
+        }
+    }
+
+    if (_default == this) {
+        _default = NULL;
+    }
+
+    _mutex->unlock();
+
+    if (getPathType() == FilePathType) {
+        extern void remove_filehandle(FileHandle * file);
+        remove_filehandle(static_cast<FileLike *>(this));
+    }
+}
+
+void FileBase::set_as_default()
+{
+    _mutex->lock();
+    _default = this;
+    _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 && len == std::strlen(p->_name) && std::memcmp(p->_name, name, len) == 0) {
+            _mutex->unlock();
+            return p;
+        }
+        p = p->_next;
+    }
+    if (len == (sizeof "default") - 1 && std::memcmp("default", name, len) == 0) {
+        _mutex->unlock();
+        return _default;
+    }
+    _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