libcruft-util/init.cpp

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/******************************************************************************
_ _
| | | |
| | ___ | |__ ___
| |/ _ \| '_ \ / _ \
| | (_) | |_) | (_) |
|_|\___/|_.__/ \___/
Copyright:
Danny Robson, 2020
*****************************************************************************/
#include "init.hpp"
#include "log.hpp"
#include <atomic>
#include <memory>
using cruft::init::cookie;
///////////////////////////////////////////////////////////////////////////////
namespace {
// Stores the various RAII handlers for any registered functionality that
// requires it.
struct state {
state ()
: log (cruft::log::setup_level_reflection ())
{ ; }
cruft::parse::enumeration::cookie log;
};
static std::unique_ptr<state> s_state;
}
//-----------------------------------------------------------------------------
// NOTE: We were using reference counting to cleanup s_state at cookie
// destruction time, but for some reason this results in a double-free under
// gcc-usan. It's easier to just allow it to live past the useful period and
// perform cleanup atexit.
static void up (void)
{
if (!s_state)
s_state = std::make_unique<state> ();
}
//-----------------------------------------------------------------------------
static void down (void)
{
}
///////////////////////////////////////////////////////////////////////////////
cookie::cookie () { up (); }
cookie::cookie (cookie &&) noexcept { up (); }
cookie::cookie (cookie const&) { up (); }
cookie& cookie::operator= (cookie &&) noexcept { up (); return *this; }
cookie& cookie::operator= (cookie const&) { up (); return *this; }
cookie::~cookie () { down (); }