共有メモリを用いて画像をプロセス間でやりとりします。

recv.C

#include <boost/interprocess/managed_shared_memory.hpp>
#include <boost/interprocess/sync/interprocess_mutex.hpp>
#include <boost/interprocess/containers/vector.hpp>
#include <boost/interprocess/allocators/allocator.hpp>
#include <boost/interprocess/sync/scoped_lock.hpp>
#include <unistd.h>
#include <opencv2/opencv.hpp>
using namespace boost::interprocess;

typedef allocator<unsigned char, managed_shared_memory::segment_manager> shmalloc;
typedef vector<unsigned char, shmalloc> shmimage;


int main( int argc, char* argv[] )
{

  managed_shared_memory shm(open_only, "NAME");


  shmimage *image = shm.find< shmimage >("Image").first;


  cv::Mat_<cv::Vec3b> im(480, 640);
  shmimage& imref = *image;
  memcpy(im.data, &imref[0], 640*480*3);
  cv::imwrite("received.jpg", im);

  usleep(1000*10);

}

tras.C

#include <boost/interprocess/managed_shared_memory.hpp>
#include <boost/interprocess/sync/interprocess_mutex.hpp>
#include <boost/interprocess/containers/vector.hpp>
#include <boost/interprocess/allocators/allocator.hpp>
#include <boost/interprocess/sync/scoped_lock.hpp>
#include <unistd.h>
#include <opencv2/opencv.hpp>

using namespace boost::interprocess;

typedef allocator < unsigned char, managed_shared_memory::segment_manager> shmalloc;
typedef vector< unsigned char, shmalloc > shmimage;

int main( int argc, char* argv[] )
{

  shared_memory_object::remove("NAME");
  managed_shared_memory shm(open_or_create, "NAME", 640*480*3+1024);


  const shmalloc alloc_inst (shm.get_segment_manager());


  shmimage * image = shm.construct < shmimage >("Image")(alloc_inst);
  shmimage & imref = * image;
  imref.resize(640*480*3);


  cv::Mat_<cv::Vec3b> im = cv::imread("testsend.jpg");
  memcpy(&imref[0], im.data, 640*480*3);

  usleep(1000*10);

}