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-rw-r--r--src/libcamera/include/file.h71
1 files changed, 71 insertions, 0 deletions
diff --git a/src/libcamera/include/file.h b/src/libcamera/include/file.h
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+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2020, Google Inc.
+ *
+ * file.h - File I/O operations
+ */
+#ifndef __LIBCAMERA_FILE_H__
+#define __LIBCAMERA_FILE_H__
+
+#include <map>
+#include <string>
+#include <sys/types.h>
+
+#include <libcamera/span.h>
+
+namespace libcamera {
+
+class File
+{
+public:
+ enum MapFlag {
+ MapNoOption = 0,
+ MapPrivate = (1 << 0),
+ };
+
+ enum OpenMode {
+ NotOpen = 0,
+ ReadOnly = (1 << 0),
+ WriteOnly = (1 << 1),
+ ReadWrite = ReadOnly | WriteOnly,
+ };
+
+ File(const std::string &name);
+ File();
+ ~File();
+
+ File(const File &) = delete;
+ File &operator=(const File &) = delete;
+
+ const std::string &fileName() const { return name_; }
+ void setFileName(const std::string &name);
+ bool exists() const;
+
+ bool open(OpenMode mode);
+ bool isOpen() const { return fd_ != -1; }
+ OpenMode openMode() const { return mode_; }
+ void close();
+
+ int error() const { return error_; }
+ ssize_t size() const;
+
+ Span<uint8_t> map(off_t offset = 0, ssize_t size = -1,
+ MapFlag flags = MapNoOption);
+ bool unmap(uint8_t *addr);
+
+ static bool exists(const std::string &name);
+
+private:
+ void unmapAll();
+
+ std::string name_;
+ int fd_;
+ OpenMode mode_;
+
+ int error_;
+ std::map<void *, size_t> maps_;
+};
+
+} /* namespace libcamera */
+
+#endif /* __LIBCAMERA_FILE_H__ */