xz: Add a comment clarifying the use of start_time in mytime.c.

This commit is contained in:
Jia Tan 2023-02-04 12:01:23 +08:00
parent 912af91b10
commit b8bce89be7
1 changed files with 5 additions and 0 deletions

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@ -20,6 +20,11 @@
uint64_t opt_flush_timeout = 0;
// The start_time variable will not represent the actual start time
// if mytime_sigtstp_handler() executes. The signal handler measures
// the amount of time spent stopped and adds it to start_time.
// So, care must be taken in the future if the actual start time needs
// to be displayed for any reason.
#ifdef USE_SIGTSTP_HANDLER
static volatile uint64_t start_time;
#else