Program Listing for File pack_ipc.hpp

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#pragma once
#include "ipc_shared_memory.hpp"
#include <sys/socket.h>

namespace PDJE_IPC {

template <typename T, int MEM_PROT_FLAG> struct IPC_SHM_LINUX {
  private:
    iovec    iov = { .iov_base = (void *)"F", .iov_len = 1 };
    cmsghdr *cmsg;

  public:
    msghdr msg = { 0 };
    IPC_SHM_LINUX(const SharedMem<T, MEM_PROT_FLAG> &shared_IPC_mem)
    {
        msg.msg_iov    = &iov;
        msg.msg_iovlen = 1;
        char cmsgbuf[CMSG_SPACE(sizeof(int))];
        msg.msg_control    = cmsgbuf;
        msg.msg_controllen = sizeof(cmsgbuf);

        cmsg             = CMSG_FIRSTHDR(&msg);
        cmsg->cmsg_level = SOL_SOCKET;
        cmsg->cmsg_type  = SCM_RIGHTS;
        cmsg->cmsg_len   = CMSG_LEN(sizeof(int));
        memcpy(CMSG_DATA(cmsg), &shared_IPC_mem.FD, sizeof(int));
    }
};
}; // namespace PDJE_IPC