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| author | Dean Scarff <deanscarff@google.com> | 2020-04-04 03:48:25 +0200 |
|---|---|---|
| committer | Jay Berkenbilt <jberkenbilt@users.noreply.github.com> | 2020-04-04 14:29:28 +0200 |
| commit | c5c1a028cdd3cf345046c46963fb0fdacfb2c33c (patch) | |
| tree | 3f5bf8810fce9519e6de6b356ebbc20296fc483c /libqpdf | |
| parent | 2100b4ce152e9c70b3ce8760112d5a24ead4e52d (diff) | |
| download | qpdf-c5c1a028cdd3cf345046c46963fb0fdacfb2c33c.tar.zst | |
Use deterministic assignments for unique_id
Fixes qpdf/qpdf#419
Diffstat (limited to 'libqpdf')
| -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() |