diff options
| -rw-r--r-- | libqpdf/QPDF.cc | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/libqpdf/QPDF.cc b/libqpdf/QPDF.cc index bbe8f31c..3177d38b 100644 --- a/libqpdf/QPDF.cc +++ b/libqpdf/QPDF.cc @@ -1,6 +1,7 @@ #include <qpdf/qpdf-config.h> // include first for large file support #include <qpdf/QPDF.hh> +#include <atomic> #include <vector> #include <map> #include <algorithm> @@ -172,9 +173,8 @@ QPDF::QPDF() : // Generate a unique ID. It just has to be unique among all QPDF // objects allocated throughout the lifetime of this running // application. - m->unique_id = static_cast<unsigned long>(QUtil::get_current_time()); - m->unique_id <<= 32; - m->unique_id |= static_cast<unsigned long>(QUtil::random()); + static std::atomic<unsigned long long> unique_id{0}; + m->unique_id = unique_id.fetch_add(1ULL); } QPDF::~QPDF() |