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Diffstat (limited to 'users/flokli/ipu6-softisp/libcamera/0005-libcamera-shared_mem_object-reorganize-the-code-and-.patch')
| -rw-r--r-- | users/flokli/ipu6-softisp/libcamera/0005-libcamera-shared_mem_object-reorganize-the-code-and-.patch | 403 |
1 files changed, 0 insertions, 403 deletions
diff --git a/users/flokli/ipu6-softisp/libcamera/0005-libcamera-shared_mem_object-reorganize-the-code-and-.patch b/users/flokli/ipu6-softisp/libcamera/0005-libcamera-shared_mem_object-reorganize-the-code-and-.patch deleted file mode 100644 index d2143febf740..000000000000 --- a/users/flokli/ipu6-softisp/libcamera/0005-libcamera-shared_mem_object-reorganize-the-code-and-.patch +++ /dev/null @@ -1,403 +0,0 @@ -From f94af21adc1889706127d07c5425f44c9cec9a95 Mon Sep 17 00:00:00 2001 -From: Andrei Konovalov <andrey.konovalov.ynk@gmail.com> -Date: Mon, 11 Mar 2024 15:15:09 +0100 -Subject: [PATCH 05/21] libcamera: shared_mem_object: reorganize the code and - document the SharedMemObject class - -Split the parts which doesn't otherwise depend on the type T or -arguments Args out of the SharedMemObject class into a new -SharedMem class. - -Doxygen documentation by Dennis Bonke and Andrei Konovalov. - -Reviewed-by: Pavel Machek <pavel@ucw.cz> -Co-developed-by: Dennis Bonke <admin@dennisbonke.com> -Signed-off-by: Dennis Bonke <admin@dennisbonke.com> -Signed-off-by: Andrei Konovalov <andrey.konovalov.ynk@gmail.com> -Signed-off-by: Hans de Goede <hdegoede@redhat.com> -Reviewed-by: Milan Zamazal <mzamazal@redhat.com> ---- - .../libcamera/internal/shared_mem_object.h | 101 ++++++---- - src/libcamera/meson.build | 1 + - src/libcamera/shared_mem_object.cpp | 190 ++++++++++++++++++ - 3 files changed, 253 insertions(+), 39 deletions(-) - create mode 100644 src/libcamera/shared_mem_object.cpp - -diff --git a/include/libcamera/internal/shared_mem_object.h b/include/libcamera/internal/shared_mem_object.h -index 98636b44..43b07c9d 100644 ---- a/include/libcamera/internal/shared_mem_object.h -+++ b/include/libcamera/internal/shared_mem_object.h -@@ -6,12 +6,9 @@ - */ - #pragma once - --#include <fcntl.h> - #include <stddef.h> - #include <string> - #include <sys/mman.h> --#include <sys/stat.h> --#include <unistd.h> - #include <utility> - - #include <libcamera/base/class.h> -@@ -19,58 +16,92 @@ - - namespace libcamera { - -+class SharedMem -+{ -+public: -+ SharedMem() -+ : mem_(nullptr) -+ { -+ } -+ -+ SharedMem(const std::string &name, std::size_t size); -+ -+ SharedMem(SharedMem &&rhs) -+ { -+ this->name_ = std::move(rhs.name_); -+ this->fd_ = std::move(rhs.fd_); -+ this->mem_ = rhs.mem_; -+ rhs.mem_ = nullptr; -+ } -+ -+ virtual ~SharedMem() -+ { -+ if (mem_) -+ munmap(mem_, size_); -+ } -+ -+ /* Make SharedMem non-copyable for now. */ -+ LIBCAMERA_DISABLE_COPY(SharedMem) -+ -+ SharedMem &operator=(SharedMem &&rhs) -+ { -+ this->name_ = std::move(rhs.name_); -+ this->fd_ = std::move(rhs.fd_); -+ this->mem_ = rhs.mem_; -+ rhs.mem_ = nullptr; -+ return *this; -+ } -+ -+ const SharedFD &fd() const -+ { -+ return fd_; -+ } -+ -+ void *mem() const -+ { -+ return mem_; -+ } -+ -+private: -+ std::string name_; -+ SharedFD fd_; -+ size_t size_; -+protected: -+ void *mem_; -+}; -+ - template<class T> --class SharedMemObject -+class SharedMemObject : public SharedMem - { - public: - static constexpr std::size_t SIZE = sizeof(T); - - SharedMemObject() -- : obj_(nullptr) -+ : SharedMem(), obj_(nullptr) - { - } - - template<class... Args> - SharedMemObject(const std::string &name, Args &&...args) -- : name_(name), obj_(nullptr) -+ : SharedMem(name, SIZE), 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) -+ if (mem_ == nullptr) - 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)...); -+ obj_ = new (mem_) T(std::forward<Args>(args)...); - } - - SharedMemObject(SharedMemObject<T> &&rhs) -+ : SharedMem(std::move(rhs)) - { -- this->name_ = std::move(rhs.name_); -- this->fd_ = std::move(rhs.fd_); - this->obj_ = rhs.obj_; - rhs.obj_ = nullptr; - } - - ~SharedMemObject() - { -- if (obj_) { -+ if (obj_) - obj_->~T(); -- munmap(obj_, SIZE); -- } - } - - /* Make SharedMemObject non-copyable for now. */ -@@ -78,8 +109,7 @@ public: - - SharedMemObject<T> &operator=(SharedMemObject<T> &&rhs) - { -- this->name_ = std::move(rhs.name_); -- this->fd_ = std::move(rhs.fd_); -+ SharedMem::operator=(std::move(rhs)); - this->obj_ = rhs.obj_; - rhs.obj_ = nullptr; - return *this; -@@ -105,19 +135,12 @@ public: - return *obj_; - } - -- const SharedFD &fd() const -- { -- return fd_; -- } -- - explicit operator bool() const - { - return !!obj_; - } - - private: -- std::string name_; -- SharedFD fd_; - T *obj_; - }; - -diff --git a/src/libcamera/meson.build b/src/libcamera/meson.build -index 3c5e43df..94a95ae3 100644 ---- a/src/libcamera/meson.build -+++ b/src/libcamera/meson.build -@@ -41,6 +41,7 @@ libcamera_sources = files([ - 'process.cpp', - 'pub_key.cpp', - 'request.cpp', -+ 'shared_mem_object.cpp', - 'source_paths.cpp', - 'stream.cpp', - 'sysfs.cpp', -diff --git a/src/libcamera/shared_mem_object.cpp b/src/libcamera/shared_mem_object.cpp -new file mode 100644 -index 00000000..44fe74c2 ---- /dev/null -+++ b/src/libcamera/shared_mem_object.cpp -@@ -0,0 +1,190 @@ -+/* SPDX-License-Identifier: LGPL-2.1-or-later */ -+/* -+ * Copyright (C) 2023, Raspberry Pi Ltd -+ * -+ * shared_mem_object.cpp - Helper class for shared memory allocations -+ */ -+ -+#include "libcamera/internal/shared_mem_object.h" -+ -+#include <sys/types.h> -+#include <unistd.h> -+ -+/** -+ * \file shared_mem_object.cpp -+ * \brief Helper class for shared memory allocations -+ */ -+ -+namespace libcamera { -+ -+/** -+ * \class SharedMem -+ * \brief Helper class for allocating shared memory -+ * -+ * Memory is allocated and exposed as a SharedFD for use across IPC boundaries. -+ * -+ * SharedMem allocates the shared memory of the given size and maps it. -+ * To check that the shared memory was allocated and mapped successfully, one -+ * needs to verify that the pointer to the shared memory returned by SharedMem::mem() -+ * is not nullptr. -+ * -+ * To access the shared memory from another process the SharedFD should be passed -+ * to that process, and then the shared memory should be mapped into that process -+ * address space by calling mmap(). -+ * -+ * A single memfd is created for every SharedMem. If there is a need to allocate -+ * a large number of objects in shared memory, these objects should be grouped -+ * together and use the shared memory allocated by a single SharedMem object if -+ * possible. This will help to minimize the number of created memfd's. -+ */ -+ -+/** -+ * \fn SharedMem::SharedMem(const std::string &name, std::size_t size) -+ * \brief Constructor for the SharedMem -+ * \param[in] name Name of the SharedMem -+ * \param[in] size Size of the shared memory to allocate and map -+ */ -+ -+/** -+ * \fn SharedMem::SharedMem(SharedMem &&rhs) -+ * \brief Move constructor for SharedMem -+ * \param[in] rhs The object to move -+ */ -+ -+/** -+ * \fn SharedMem::~SharedMem() -+ * \brief SharedMem destructor -+ * -+ * Unmaps the allocated shared memory. Decrements the shared memory descriptor use -+ * count. -+ */ -+ -+/** -+ * \fn SharedMem &SharedMem::operator=(SharedMem &&rhs) -+ * \brief Move constructor for SharedMem -+ * \param[in] rhs The object to move -+ */ -+ -+/** -+ * \fn const SharedFD &SharedMem::fd() const -+ * \brief Gets the file descriptor for the underlying shared memory -+ * \return The file descriptor -+ */ -+ -+/** -+ * \fn void *SharedMem::mem() const -+ * \brief Gets the pointer to the underlying shared memory -+ * \return The pointer to the shared memory -+ */ -+ -+SharedMem::SharedMem(const std::string &name, std::size_t size) -+ : name_(name), size_(size), mem_(nullptr) -+{ -+ int fd = memfd_create(name_.c_str(), MFD_CLOEXEC); -+ if (fd < 0) -+ return; -+ -+ fd_ = SharedFD(std::move(fd)); -+ if (!fd_.isValid()) -+ return; -+ -+ if (ftruncate(fd_.get(), size_) < 0) -+ return; -+ -+ mem_ = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_SHARED, -+ fd_.get(), 0); -+ if (mem_ == MAP_FAILED) -+ mem_ = nullptr; -+} -+ -+/** -+ * \var SharedMem::mem_ -+ * \brief Pointer to the shared memory allocated -+ */ -+ -+/** -+ * \class SharedMemObject -+ * \brief Helper class for allocating objects in shared memory -+ * -+ * Memory is allocated and exposed as a SharedFD for use across IPC boundaries. -+ * -+ * Given the type of the object to be created in shared memory and the arguments -+ * to pass to this object's constructor, SharedMemObject allocates the shared memory -+ * of the size of the object and constructs the object in this memory. To ensure -+ * that the SharedMemObject was created successfully, one needs to verify that the -+ * overloaded bool() operator returns true. The object created in the shared memory -+ * can be accessed using the SharedMemObject::operator*() indirection operator. Its -+ * members can be accessed with the SharedMemObject::operator->() member of pointer -+ * operator. -+ * -+ * To access the object from another process the SharedFD should be passed to that -+ * process, and the shared memory should be mapped by calling mmap(). -+ * -+ * A single memfd is created for every SharedMemObject. If there is a need to allocate -+ * a large number of objects in shared memory, these objects should be grouped into a -+ * single large object to keep the number of created memfd's reasonably small. -+ */ -+ -+/** -+ * \var SharedMemObject::SIZE -+ * \brief The size of the object that is going to be stored here -+ */ -+ -+/** -+ * \fn SharedMemObject< T >::SharedMemObject(const std::string &name, Args &&...args) -+ * \brief Constructor for the SharedMemObject -+ * \param[in] name Name of the SharedMemObject -+ * \param[in] args Args to pass to the constructor of the object in shared memory -+ */ -+ -+/** -+ * \fn SharedMemObject::SharedMemObject(SharedMemObject<T> &&rhs) -+ * \brief Move constructor for SharedMemObject -+ * \param[in] rhs The object to move -+ */ -+ -+/** -+ * \fn SharedMemObject::~SharedMemObject() -+ * \brief SharedMemObject destructor -+ * -+ * Destroys the object created in the shared memory and then unmaps the shared memory. -+ * Decrements the shared memory descriptor use count. -+ */ -+ -+/** -+ * \fn SharedMemObject::operator=(SharedMemObject<T> &&rhs) -+ * \brief Operator= for SharedMemObject -+ * \param[in] rhs The SharedMemObject object to take the data from -+ */ -+ -+/** -+ * \fn SharedMemObject::operator->() -+ * \brief Operator-> for SharedMemObject -+ * \return The pointer to the object -+ */ -+ -+/** -+ * \fn const T *SharedMemObject::operator->() const -+ * \brief Operator-> for SharedMemObject -+ * \return The pointer to the const object -+ */ -+ -+/** -+ * \fn SharedMemObject::operator*() -+ * \brief Operator* for SharedMemObject -+ * \return The reference to the object -+ */ -+ -+/** -+ * \fn const T &SharedMemObject::operator*() const -+ * \brief Operator* for SharedMemObject -+ * \return Const reference to the object -+ */ -+ -+/** -+ * \fn SharedMemObject::operator bool() -+ * \brief Operator bool() for SharedMemObject -+ * \return True if the object was created OK in the shared memory, false otherwise -+ */ -+ -+} // namespace libcamera --- -2.43.2 - |