demotool/common.cc

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#include "externals.hh"
#include "common.hh"
#include "c-filewatcher.hh"
#include "c-opcomp.hh"
#include "c-ops.hh"
#include "c-project.hh"
#include "c-sync.hh"
#include "c-undo.hh"
namespace {
struct CommonData_
{
T_Project project;
T_FilesWatcher watcher;
T_SyncManager sync;
T_ScriptManager ops;
T_UndoManager undo;
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CommonData_( T_FSPath const& path ) noexcept
: project{ path }
{}
};
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uint32_t Initialised_{ 0 };
std::aligned_storage_t< sizeof( CommonData_ ) , alignof( CommonData_ ) > Instance_;
} // namespace <anon>
/*----------------------------------------------------------------------------*/
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Common::Common(
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T_FSPath const& path ) noexcept
{
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if ( !Initialised_ ++ ) {
new ((char*)&Instance_) CommonData_( path );
}
}
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Common::~Common( ) noexcept
{
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assert( Initialised_ );
if ( !-- Initialised_ ) {
((CommonData_*)(char*)&Instance_)->~CommonData_( );
}
}
/*----------------------------------------------------------------------------*/
#define M_GET_( P ) ((CommonData_*)(char*)&Instance_)->P
T_Project& Common::Project( ) noexcept
{ return M_GET_( project ); }
T_FilesWatcher& Common::Watcher( ) noexcept
{ return M_GET_( watcher ); }
T_SyncManager& Common::Sync( ) noexcept
{ return M_GET_( sync ); }
T_ScriptManager& Common::Ops( ) noexcept
{ return M_GET_( ops ); }
T_UndoManager& Common::Undo( ) noexcept
{ return M_GET_( undo ); }