Shared memory image buffer header. More...
#include <>>
Public Member Functions | |
SharedMemoryImageBufferHeader () | |
Constructor. | |
SharedMemoryImageBufferHeader (const char *image_id, colorspace_t colorspace, unsigned int width, unsigned int height) | |
Constructor. | |
SharedMemoryImageBufferHeader (const SharedMemoryImageBufferHeader *h) | |
Copy constructor. | |
virtual | ~SharedMemoryImageBufferHeader () |
Destructor. | |
virtual fawkes::SharedMemoryHeader * | clone () const |
Clone this shared memory header. | |
virtual bool | matches (void *memptr) |
Method to check if the given memptr matches this header. | |
virtual size_t | size () |
Size of the header. | |
virtual void | print_info () |
Print some info. | |
virtual bool | create () |
Create if colorspace, width and height have been supplied. | |
virtual void | initialize (void *memptr) |
Initialize the header. | |
virtual void | set (void *memptr) |
Set information from memptr. | |
virtual void | reset () |
Reset information previously set with set(). | |
virtual size_t | data_size () |
Return the size of the data. | |
virtual bool | operator== (const fawkes::SharedMemoryHeader &s) const |
Check for equality of headers. | |
void | set_image_id (const char *image_id) |
Set image id. | |
colorspace_t | colorspace () const |
Get colorspace. | |
unsigned int | width () const |
Get width. | |
unsigned int | height () const |
Get height. | |
const char * | image_id () const |
Get image number. | |
SharedMemoryImageBuffer_header_t * | raw_header () |
Get raw header. |
Shared memory image buffer header.
Definition at line 67 of file shm_image.h.
firevision::SharedMemoryImageBufferHeader::SharedMemoryImageBufferHeader | ( | ) |
firevision::SharedMemoryImageBufferHeader::SharedMemoryImageBufferHeader | ( | const char * | image_id, | |
colorspace_t | colorspace, | |||
unsigned int | width, | |||
unsigned int | height | |||
) |
Constructor.
image_id | image id | |
colorspace | colorspace | |
width | width | |
height | height |
Definition at line 553 of file shm_image.cpp.
firevision::SharedMemoryImageBufferHeader::SharedMemoryImageBufferHeader | ( | const SharedMemoryImageBufferHeader * | h | ) |
Copy constructor.
h | shared memory image header to copy |
Definition at line 574 of file shm_image.cpp.
firevision::SharedMemoryImageBufferHeader::~SharedMemoryImageBufferHeader | ( | ) | [virtual] |
Destructor.
Definition at line 594 of file shm_image.cpp.
SharedMemoryHeader * firevision::SharedMemoryImageBufferHeader::clone | ( | ) | const [virtual] |
Clone this shared memory header.
This method shall return a copied instance of this SharedMemoryHeader derivate. It should act the same way as the current instance.
Implements fawkes::SharedMemoryHeader.
Definition at line 609 of file shm_image.cpp.
References SharedMemoryImageBufferHeader().
colorspace_t firevision::SharedMemoryImageBufferHeader::colorspace | ( | ) | const |
Get colorspace.
Definition at line 769 of file shm_image.cpp.
References firevision::SharedMemoryImageBuffer_header_t::colorspace.
Referenced by firevision::SharedMemoryImageBufferLister::print_info(), and firevision::FuseServerClientThread::process_getimagelist_message().
bool firevision::SharedMemoryImageBufferHeader::create | ( | ) | [virtual] |
Create if colorspace, width and height have been supplied.
Definition at line 702 of file shm_image.cpp.
size_t firevision::SharedMemoryImageBufferHeader::data_size | ( | ) | [virtual] |
Return the size of the data.
The size of the data that will be stored in the shared memory segment. This method has to return the same value everytime and may only depend on the other data set in the header and written to the shared memory segment.
Implements fawkes::SharedMemoryHeader.
Definition at line 616 of file shm_image.cpp.
References firevision::SharedMemoryImageBuffer_header_t::colorspace, firevision::SharedMemoryImageBuffer_header_t::height, and firevision::SharedMemoryImageBuffer_header_t::width.
unsigned int firevision::SharedMemoryImageBufferHeader::height | ( | ) | const |
Get height.
Definition at line 791 of file shm_image.cpp.
References firevision::SharedMemoryImageBuffer_header_t::height.
Referenced by firevision::SharedMemoryImageBufferLister::print_info(), and firevision::FuseServerClientThread::process_getimagelist_message().
const char * firevision::SharedMemoryImageBufferHeader::image_id | ( | ) | const |
Get image number.
Definition at line 802 of file shm_image.cpp.
Referenced by firevision::SharedMemoryImageBufferLister::print_info(), and firevision::FuseServerClientThread::process_getimagelist_message().
void firevision::SharedMemoryImageBufferHeader::initialize | ( | void * | memptr | ) | [virtual] |
Initialize the header.
This should initialize the header data in the given memptr from the data of this SharedMemoryHeader derivate instance. It has to write out all state information that is needed to identify the shared memory segment later on.
memptr | the memptr where the header data shall be written to. |
Implements fawkes::SharedMemoryHeader.
Definition at line 711 of file shm_image.cpp.
References firevision::SharedMemoryImageBuffer_header_t::colorspace, firevision::SharedMemoryImageBuffer_header_t::height, firevision::SharedMemoryImageBuffer_header_t::image_id, and firevision::SharedMemoryImageBuffer_header_t::width.
bool firevision::SharedMemoryImageBufferHeader::matches | ( | void * | memptr | ) | [virtual] |
Method to check if the given memptr matches this header.
This method is called when searching for a shared memory segment to open, list or erase it. Implement this to distuinguish several shared memory segments that share the same magic token.
memptr | The memory chunk in the shared memory segment where to start checking. |
Implements fawkes::SharedMemoryHeader.
Definition at line 627 of file shm_image.cpp.
References firevision::SharedMemoryImageBuffer_header_t::colorspace, firevision::SharedMemoryImageBuffer_header_t::height, firevision::SharedMemoryImageBuffer_header_t::image_id, and firevision::SharedMemoryImageBuffer_header_t::width.
bool firevision::SharedMemoryImageBufferHeader::operator== | ( | const fawkes::SharedMemoryHeader & | s | ) | const [virtual] |
Check for equality of headers.
First checks if passed SharedMemoryHeader is an instance of SharedMemoryImageBufferHeader. If not returns false, otherwise it compares image ID, colorspace, width, and height. If all match returns true, false if any of them differs.
s | shared memory header to compare to |
Implements fawkes::SharedMemoryHeader.
Definition at line 661 of file shm_image.cpp.
void firevision::SharedMemoryImageBufferHeader::print_info | ( | ) | [virtual] |
Print some info.
Definition at line 676 of file shm_image.cpp.
SharedMemoryImageBuffer_header_t * firevision::SharedMemoryImageBufferHeader::raw_header | ( | ) |
Get raw header.
Definition at line 823 of file shm_image.cpp.
Referenced by firevision::SharedMemoryImageBuffer::set_image_id().
void firevision::SharedMemoryImageBufferHeader::reset | ( | ) | [virtual] |
Reset information previously set with set().
This shall restore the state the header had before set() was called. This is used for instance in the SharedMemoryLister after info about one segment has been printed.
Implements fawkes::SharedMemoryHeader.
Definition at line 749 of file shm_image.cpp.
void firevision::SharedMemoryImageBufferHeader::set | ( | void * | memptr | ) | [virtual] |
Set information from memptr.
Set the information stored in this SharedMemoryHeader derivate instance from the data stored in the given memptr.
memptr | The memptr where to copy data from. |
Implements fawkes::SharedMemoryHeader.
Definition at line 726 of file shm_image.cpp.
References firevision::SharedMemoryImageBuffer_header_t::colorspace, firevision::SharedMemoryImageBuffer_header_t::height, firevision::SharedMemoryImageBuffer_header_t::image_id, and firevision::SharedMemoryImageBuffer_header_t::width.
void firevision::SharedMemoryImageBufferHeader::set_image_id | ( | const char * | image_id | ) |
Set image id.
image_id | image ID |
Definition at line 812 of file shm_image.cpp.
Referenced by firevision::SharedMemoryImageBuffer::set_image_id().
size_t firevision::SharedMemoryImageBufferHeader::size | ( | ) | [virtual] |
Size of the header.
The size that is needed in the shared memory memptr to accomodate the header data. This size has to fit all the data that will be stored in the header. It must return the same size every time.
Implements fawkes::SharedMemoryHeader.
Definition at line 602 of file shm_image.cpp.
unsigned int firevision::SharedMemoryImageBufferHeader::width | ( | ) | const |
Get width.
Definition at line 780 of file shm_image.cpp.
References firevision::SharedMemoryImageBuffer_header_t::width.
Referenced by firevision::SharedMemoryImageBufferLister::print_info(), and firevision::FuseServerClientThread::process_getimagelist_message().