libcamera v0.5.1
Supporting cameras in Linux since 2019
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memfd.h
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1/* SPDX-License-Identifier: LGPL-2.1-or-later */
2/*
3 * Copyright (C) 2024, Ideas on Board Oy
4 *
5 * Anonymous file creation
6 */
7
8#pragma once
9
12
13namespace libcamera {
14
15class MemFd
16{
17public:
18 enum class Seal {
19 None = 0,
20 Shrink = (1 << 0),
21 Grow = (1 << 1),
22 };
23
25
26 static UniqueFD create(const char *name, std::size_t size,
27 Seals seals = Seal::None);
28};
29
31
32} /* namespace libcamera */
Type-safe container for enum-based bitfields.
Definition flags.h:16
Helper class to create anonymous files.
Definition memfd.h:16
Seal
Seals for the MemFd::create() function.
Definition memfd.h:18
@ Shrink
Prevent the memfd from shrinking.
Definition memfd.h:20
@ None
No seals (used as default value)
Definition memfd.h:19
@ Grow
Prevent the memfd from growing.
Definition memfd.h:21
static UniqueFD create(const char *name, std::size_t size, Seals seals=Seal::None)
Create an anonymous file.
Definition memfd.cpp:84
Flags< Seal > Seals
A bitwise combination of MemFd::Seal values.
Definition memfd.h:24
unique_ptr-like wrapper for a file descriptor
Definition unique_fd.h:17
Enum-based bit fields.
#define LIBCAMERA_FLAGS_ENABLE_OPERATORS(_enum)
Enable bitwise operations on the enum enumeration.
Definition flags.h:189
Top-level libcamera namespace.
Definition backtrace.h:17
File descriptor wrapper that owns a file descriptor.