//-----------------------------------------------------------------------------
// signal-wait.h
//-----------------------------------------------------------------------------

#include <csignal>
#include <pthread.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <thread>
#include <unistd.h>

#ifdef __has_include
#if __has_include(<boost/fiber/fiber.hpp>)
#include <boost/fiber/fiber.hpp>
#endif // __has_include
#endif // __has_include(<boost/fiber/fiber.hpp>)

#ifdef __has_include
#if __has_include(<tbb/tbb.h>)
#include <tbb/tbb.h>
#endif // __has_include
#endif // __has_include(<tbb/tbb.h>)

//-----------------------------------------------------------------------------

#ifdef __has_include
#if __has_include(<boost/fiber/fiber.hpp>)

void usuario()
{
    signal(SIGUSR1, SIG_IGN);
    boost::fibers::fiber t([] { raise(SIGUSR1); });
    t.join();
}

#endif // __has_include
#endif // __has_include(<boost/fiber/fiber.hpp>)

//-----------------------------------------------------------------------------

#ifdef __has_include
#if __has_include(<tbb/tbb.h>)

void hibrida()
{
    pid_t parent = getpid();
    signal(SIGUSR1, SIG_IGN);
    tbb::task_group tg;
    tg.run([&] { kill(parent, SIGUSR1); });
    tg.wait();
}

#endif // __has_include
#endif // __has_include(<tbb/tbb.h>)

//-----------------------------------------------------------------------------

void nucleo()
{
    pthread_t parent = pthread_self();
    signal(SIGUSR1, SIG_IGN);
    std::thread t([&] { pthread_kill(parent, SIGUSR1); });
    t.join();
}

//-----------------------------------------------------------------------------

void proceso()
{
    pid_t parent = getpid();
    if (fork())
    {
        signal(SIGUSR1, SIG_IGN);
        wait(nullptr);
    }
    else
    {
        kill(parent, SIGUSR1);
        exit(0);
    }
}

//-----------------------------------------------------------------------------