Sorry to bother you. I am writing code to make this code,"http://coliru.stacked-crooked.com/a/0ab21481b69d87bb" in this question "Structures and vectors in Boost Shared Memory", the basis
But, I am stuck in compile error of this line.
data.push_back(id); // 14 line in main function
This "data" val is no matching "push_back" function. This val is declared by "auto&" in this line.
auto& data = Shared::locate(smt); // 10 line in "while(1)" of main function
(This locate(smt) function is construct of a complex struct's vector in shared memory )
I assume that "data" is vector or iterator of the complex struct, but there are no way to run this line that I know.
I wonder I was wrong somewhere in this code, but I don't know where is.
Please, help me.
Note 1: line of "data.push_back(id);" is no matching function for call to ‘boost::container::vector, boost::interprocess::iset_index> > >, boost::interprocess::allocator, boost::interprocess::iset_index> > >, boost::interprocess::segment_manager, boost::interprocess::iset_index> > >::push_back(InData&)’ candidate: void boost::container::vector::push_back(const T&) [with T = BasicInData, boost::interprocess::iset_index> > >; Allocator = boost::interprocess::allocator, boost::interprocess::iset_index> > >, boost::interprocess::segment_manager, boost::interprocess::iset_index> >]|
Note 2 : Now, I try to change to the line below;
cv::Mat_<cv::Vec3b> mat;
cv::VideoCapture vcap(0);
InData id(Shared::alloc<uchar_allocator>);
// camera open check
if (!vcap.isOpened())
return -1;
But, another compile error occuring "'id' which is of non-class type ". I feel lack of something. How do i do?
// opencv's lib
#include <cv.h>
#include <cxcore.h>
#include <highgui.h>
// opencv's lib end
#include <string>
#include <boost/interprocess/managed_shared_memory.hpp>
#include <boost/interprocess/managed_mapped_file.hpp> // use for Coliru
#include <boost/interprocess/containers/vector.hpp> // boost/containers/vector.hpp
#include <boost/interprocess/containers/string.hpp> // boost/containers/string.hpp
#include <iostream>
#include <sys/time.h>
#include <stdio.h>
// void_allocator;
namespace bip = boost::interprocess;
typedef unsigned char uchar;
//Typedefs of allocators and containers
typedef bip::managed_shared_memory::segment_manager segment_manager_t;
typedef bip::allocator<void, segment_manager_t> void_allocator;
typedef void_allocator::rebind<uchar>::other uchar_allocator;
typedef bip::vector<uchar, uchar_allocator> uchar_vector;
template <typename Alloc = std::allocator<char> >
struct BasicInData {
public:
BasicInData(Alloc alloc = {}) : image(alloc)
{ }
template <typename T>
BasicInData(double x, int sizeImg, uchar_vector& image, Alloc alloc = {}) :
x(x), sizeImg(sizeImg), image(alloc)
{ }
double x = 0;
int sizeImg = 0;
uchar_vector image;
};
using InData = BasicInData<>; // just heap allocated
namespace Shared {
using segment = bip::managed_shared_memory;
using segment_manager = segment::segment_manager;
template <typename T> using alloc = bip::allocator<T, segment_manager>;
template <typename T> using vector = bip::vector<T, alloc<T> >;
using InData = BasicInData<alloc<char> >; // shared memory version
vector<InData>& locate(segment& smt) {
auto* v = smt.find_or_construct<vector<InData> >("InDataVector")(smt.get_segment_manager());
assert(v);
return *v;
}
}
int main(int argc, char* argv[]) {
if(argc == 1){ //Parent process
struct timeval tv;
// there are making no sense 2 line in below, just examine
gettimeofday(&tv, NULL);
double time = ((double)tv.tv_usec/1000000);
// Remove shared memory on construction and destruction
// Create a new segment with given name and size
struct shm_remove
{
shm_remove(){bip::shared_memory_object::remove("MySharedMemory");}
~shm_remove(){bip::shared_memory_object::remove("MySharedMemory");}
}remover;
Shared::segment smt(bip::create_only,"MySharedMemory", 65536); // 65536 for coliru
auto& data = Shared::locate(smt);
//Shared::alloc bip::alloc_inst (data);
// Camera Capture
cv::Mat_<cv::Vec3b> mat;
cv::VideoCapture vcap(0);
InData id;
// camera open check
if (!vcap.isOpened())
return -1;
while (1) { // while keyboard key push
vcap >> mat; // camera to mat
int image_size = mat.total() * mat.elemSize();
id.sizeImg = image_size;
id.image.resize(image_size * sizeof(uchar));
memcpy(&id.image[0], mat.data, image_size * sizeof(uchar));
// get microsecond by double
gettimeofday(&tv, NULL);
double time = ((double)tv.tv_usec/1000000);
id.x = time;
data.push_back(id);
if(cv::waitKey(30) >= 0) break; // keyboard pushed
}
//Launch child process
std::string s(argv[0]); s += " child";
if(0 != std::system(s.c_str()))
return 1;
// check child has destroyed the vector
if(segment.find<vector<InData>>("InDataVector").first)
return 1;
}
}else{
// Open the managed segment
managed_shared_memory segment(open_only, "MySharedMemory");
// Find the vector
vector<InData> *myvector = segment.find<vector<InData>>("InDataVector").first;
// Use vector in reverse order
vector<InData>::iterator it;
cv::Mat_<cv::Vec3b> im;
for(it = myvector->begin(); it !=myvector->end(); ++it){
im.resize(it->sizeImg);
memcpy(im.data, &imref[0], it->sizeImg);
cv::imshow("window1", im);
}
segment.destroy<vector<InData>>("InDataVector");
return 0;
}
}
I suggest get
BasicInData(const BasicInData &data)andBasicInData &operate =(const BasicInData &data)function.