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getS16NoEx() returns true unless syntactical error in conf. (#8304)

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The getS16NoEx() handler will return true unless there is a
`[num_emerge_threads]` line in the `minetest.conf` at which
point the excption handler part is reached. Due to the fact that
`defaultsettings.cpp` has a default value set for this setting,
that never will happen.

Because of this, the code will never check the number of threads on
the system, and keep `nthreads = 0`. If that happens, the value is
changed to `1` and only 1 emerge thread will be used.

The default should be set to `1` instead, due to the potential unsafe
consequences for the standard sqlite map files, but that should be a
separate commit that also adds documentation for that setting. This
commit focuses on removing this `hiding` bug instead.
This commit is contained in:
sofar 2019-03-04 23:11:13 -08:00 committed by Loïc Blot
parent 51662dabb4
commit 61e5fbab72
1 changed files with 4 additions and 2 deletions
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6
src/emerge.cpp
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@ -130,11 +130,13 @@ EmergeManager::EmergeManager(Server *server)
// If unspecified, leave a proc for the main thread and one for
// some other misc thread
s16 nthreads = 0;
if (!g_settings->getS16NoEx("num_emerge_threads", nthreads))
s16 nthreads;
g_settings->getS16NoEx("num_emerge_threads", nthreads);
if (nthreads == 0)
nthreads = Thread::getNumberOfProcessors() - 2;
if (nthreads < 1)
nthreads = 1;
verbosestream << "Using " << nthreads << " emerge threads." << std::endl;
m_qlimit_total = g_settings->getU16("emergequeue_limit_total");
if (!g_settings->getU16NoEx("emergequeue_limit_diskonly", m_qlimit_diskonly))