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bin: workaround flushing issues

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* bin/common_cout.cc (check_cout): Force a flush of cout if more than
20ms has elapsed since the last explicit flush.
* bin/common_setup.cc (setup): Untie cin and cout if the input
is not a TTY, so that cout is flush less often.
* NEWS: Mention the change.
This commit is contained in:
Alexandre Duret-Lutz 2016-10-03 15:19:02 +02:00
parent 0678d1a662
commit 0c9c4be4ae
3 changed files with 44 additions and 6 deletions
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6
bin/common_setup.cc
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@ -22,6 +22,7 @@
#include "argp.h"
#include <cstdlib>
#include <unistd.h>
#include <iostream>
#include <signal.h>
#include <sys/wait.h>
@ -83,6 +84,11 @@ setup(char** argv)
argp_err_exit_status = 2;
std::ios_base::sync_with_stdio(false);
// Do not flush std::cout every time we read from std::cin, unless
// we are reading from a terminal. Note that we do flush regularly
// in check_cout().
if (!isatty(STDIN_FILENO))
std::cin.tie(nullptr);
setup_default_output_format();
setup_sig_handler();