Method closeMapping

Engine/MemoryFile.cpp:332–378

}

void
MemoryFilePrivate::closeMapping(bool drop_pages)
{
#if defined(__NATRON_UNIX__)
    if (drop_pages) {
        int rc;
#ifdef MS_KILLPAGES
        // Mac OS X always returns an error with MADV_FREE,
        // so we'll use msync(MS_KILLPAGES) instead.
        rc = msync(data, size, MS_KILLPAGES);
        //if( rc ) return ERR_MEM_STR_NUM("drop_pages(MS_KILLPAGES) failed", rc);
#else
# ifdef MADV_FREE
        rc = madvise(data, size, MADV_FREE);
        //if( rc ) return ERR_MEM_STR_NUM("drop_pages(MADV_FREE) failed", rc);
# else
#  ifdef POSIX_MADV_DONTNEED
        // we just hope that DONTNEED will actually free
        // the pages...
        rc = posix_madvise(data, size, POSIX_MADV_DONTNEED);
        //if( rc ) return ERR_MEM_STR_NUM("drop_pages(POSIX_MADV_DONTNEED) failed", rc);
#  else
        rc = madvise(data, size, MADV_DONTNEED);
        //if( rc ) return ERR_MEM_STR_NUM("drop_pages(MADV_DONTNEED) failed", rc);
        // end if POSIX_MADV_DONTNEED
#  endif
        // end if MADV_FREE
# endif
        // end if MS_KILLPAGES
#endif
        Q_UNUSED(rc);
    }
    if (::munmap(data, size) != 0) {
        std::stringstream ss;
        ss << "MemoryFile EXC : Failed to unmap \"" << path << "\": " << std::strerror(errno) << " (" << errno << ")";
        throw std::runtime_error( ss.str() );
    }
    ::close(file_handle);
#elif defined(__NATRON_WIN32__)
    Q_UNUSED(drop_pages);
    if (::UnmapViewOfFile(data) == 0) {
        throw std::runtime_error("Failed to unmap the mapped file");
    }
    ::CloseHandle(file_mapping_handle);
    ::CloseHandle(file_handle);
#endif
}

bool
MemoryFile::flush(FlushTypeEnum type, void* data, std::size_t size)