diff options
Diffstat (limited to 'src/xz/private.h')
| -rw-r--r-- | src/xz/private.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/xz/private.h b/src/xz/private.h index 6414bdb5..a20dbc57 100644 --- a/src/xz/private.h +++ b/src/xz/private.h @@ -49,6 +49,18 @@ # define ENABLE_SANDBOX 1 #endif +// Handling SIGTSTP keeps time-keeping for progress indicator correct +// if xz is stopped. It requires use of clock_gettime() as that is +// async-signal safe in POSIX. Require also SIGALRM support since +// on systems where SIGALRM isn't available, progress indicator code +// polls the time and the SIGTSTP handling adds slight overhead to +// that code. Most (all?) systems that have SIGTSTP also have SIGALRM +// so this requirement won't exclude many systems. +#if defined(HAVE_CLOCK_GETTIME) && defined(HAVE_CLOCK_MONOTONIC) \ + && defined(SIGTSTP) && defined(SIGALRM) +# define USE_SIGTSTP_HANDLER 1 +#endif + #include "main.h" #include "mytime.h" #include "coder.h" |