libcamera: internal: Move SharedMemObject class to a common directory

Move SharedMemObject class out of RPi namespace and put it into
include/libcamera/internal so that everyone could use it.

Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> # sc8280xp Lenovo x13s
Tested-by: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Milan Zamazal <mzamazal@redhat.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Andrey Konovalov <andrey.konovalov@linaro.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

1 files changed, 0 insertions, 128 deletions

diff --git a/src/libcamera/pipeline/rpi/common/shared_mem_object.h b/src/libcamera/pipeline/rpi/common/shared_mem_object.h
deleted file mode 100644
index aa56c220..00000000
--- a/src/libcamera/pipeline/rpi/common/shared_mem_object.h
+++ /dev/null
@@ -1,128 +0,0 @@
-/* SPDX-License-Identifier: LGPL-2.1-or-later */
-/*
- * Copyright (C) 2023, Raspberry Pi Ltd
- *
- * shared_mem_object.h - Helper class for shared memory allocations
- */
-#pragma once
-
-#include <cstddef>
-#include <fcntl.h>
-#include <string>
-#include <sys/mman.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <utility>
-
-#include <libcamera/base/class.h>
-#include <libcamera/base/shared_fd.h>
-
-namespace libcamera {
-
-namespace RPi {
-
-template<class T>
-class SharedMemObject
-{
-public:
-	static constexpr std::size_t SIZE = sizeof(T);
-
-	SharedMemObject()
-		: obj_(nullptr)
-	{
-	}
-
-	template<class... Args>
-	SharedMemObject(const std::string &name, Args &&...args)
-		: name_(name), obj_(nullptr)
-	{
-		void *mem;
-		int ret;
-
-		ret = memfd_create(name_.c_str(), MFD_CLOEXEC);
-		if (ret < 0)
-			return;
-
-		fd_ = SharedFD(std::move(ret));
-		if (!fd_.isValid())
-			return;
-
-		ret = ftruncate(fd_.get(), SIZE);
-		if (ret < 0)
-			return;
-
-		mem = mmap(nullptr, SIZE, PROT_READ | PROT_WRITE, MAP_SHARED,
-			   fd_.get(), 0);
-		if (mem == MAP_FAILED)
-			return;
-
-		obj_ = new (mem) T(std::forward<Args>(args)...);
-	}
-
-	SharedMemObject(SharedMemObject<T> &&rhs)
-	{
-		this->name_ = std::move(rhs.name_);
-		this->fd_ = std::move(rhs.fd_);
-		this->obj_ = rhs.obj_;
-		rhs.obj_ = nullptr;
-	}
-
-	~SharedMemObject()
-	{
-		if (obj_) {
-			obj_->~T();
-			munmap(obj_, SIZE);
-		}
-	}
-
-	/* Make SharedMemObject non-copyable for now. */
-	LIBCAMERA_DISABLE_COPY(SharedMemObject)
-
-	SharedMemObject<T> &operator=(SharedMemObject<T> &&rhs)
-	{
-		this->name_ = std::move(rhs.name_);
-		this->fd_ = std::move(rhs.fd_);
-		this->obj_ = rhs.obj_;
-		rhs.obj_ = nullptr;
-		return *this;
-	}
-
-	T *operator->()
-	{
-		return obj_;
-	}
-
-	const T *operator->() const
-	{
-		return obj_;
-	}
-
-	T &operator*()
-	{
-		return *obj_;
-	}
-
-	const T &operator*() const
-	{
-		return *obj_;
-	}
-
-	const SharedFD &fd() const
-	{
-		return fd_;
-	}
-
-	explicit operator bool() const
-	{
-		return !!obj_;
-	}
-
-private:
-	std::string name_;
-	SharedFD fd_;
-	T *obj_;
-};
-
-} /* namespace RPi */
-
-} /* namespace libcamera */