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ircd::log: Use reentrance_assertion; make principal buffer static.

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This commit is contained in:
Jason Volk 2017-12-22 23:54:32 -07:00
parent df38f2c8fa
commit f4e85af4c2
1 changed files with 19 additions and 15 deletions
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34
ircd/logger.cc
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@ -310,6 +310,12 @@ ircd::log::vlog(const facility &fac,
});
}
namespace ircd::log
{
// linkage for slog() reentrance assertion
bool entered;
}
void
ircd::log::slog(const facility &fac,
const std::function<void (mutable_buffer &)> &closure)
@ -318,22 +324,20 @@ noexcept
if(!file[fac].is_open() && !console_out[fac] && !console_err[fac])
return;
// Have to be on the main thread to call slog(). If slog() yields for some
// reason it's a problem too. During the composition of this log message,
// if another log message is created from calls for normal reasons or from
// errors, that's not good either. We can only have one log slog() at a
// time for now...
// Have to be on the main thread to call slog().
assert_main_thread();
const ctx::critical_assertion ca;
static bool entered;
assert(!entered);
entered = true;
const unwind leaving([]
{
entered = false;
});
char buf[1024];
// During the composition of this log message, if another log message
// is created from calls for normal reasons or from errors, it's a
// problem too. We can only have one log slog() at a time for now...
const reentrance_assertion<entered> ra;
// If slog() yields for some reason that's not good either...
const ctx::critical_assertion ca;
// The principal buffer doesn't have to be static but courtesy of all the
// above effort we might as well take advantage...
static char buf[1024];
static const string_view terminator{"\r\n"};
const size_t max(sizeof(buf) - size(terminator));
@ -341,7 +345,7 @@ noexcept
s.rdbuf()->pubsetbuf(buf, max);
//TODO: XXX: Add option toggle for smalldate()
char date[64];
static char date[64];
s << microtime(date)
<< ' '
<< (console_ansi[fac]? console_ansi[fac] : "")