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llama.cpp
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common: fix 32-bit overflow for avoiding year 2038 problem 

std::chrono::system_clock_::to_time_t() does not guarantee 64-bit time.
More info: https://stackoverflow.com/questions/79248038/c-chrono-store-and-retrieve-date-and-time-in-64-bit-format-for-2038-rollover

References:

- https://en.wikipedia.org/wiki/Year_2038_problem
- https://www.gnu.org/software/gnulib/manual/html_node/Avoiding-the-year-2038-problem.html
This commit is contained in:
Herman Semenoff 2026-01-28 01:52:23 +03:00
parent d6742125c3
commit e53f408e10
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1 changed files with 11 additions and 3 deletions
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common/common.cpp
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@ -426,10 +426,18 @@ std::string string_strip(const std::string & str) {
std::string string_get_sortable_timestamp() {
using clock = std::chrono::system_clock;
const clock::time_point current_time = clock::now();
const time_t as_time_t = clock::to_time_t(current_time);
const auto current_time = clock::now();
const auto as_time_t = std::chrono::duration_cast<std::chrono::seconds>(current_time.time_since_epoch()).count();
struct tm timeinfo;
#ifdef _WIN32
gmtime_s(&timeinfo, &as_time_t);
#else
gmtime_r(&as_time_t, &timeinfo);
#endif
char timestamp_no_ns[100];
std::strftime(timestamp_no_ns, 100, "%Y_%m_%d-%H_%M_%S", std::localtime(&as_time_t));
std::strftime(timestamp_no_ns, 100, "%Y_%m_%d-%H_%M_%S", &timeinfo);
const int64_t ns = std::chrono::duration_cast<std::chrono::nanoseconds>(
current_time.time_since_epoch() % 1000000000).count();