threads: fix unitialized members in sched_param
Building with gcc 8.2 against musl libc, which apparently has more attributes available in its sched_param. The following warnings were produced: warning: missing initializer for member 'sched_param::sched_ss_low_priority' [-Wmissing-field-initializers] warning: missing initializer for member 'sched_param::sched_ss_repl_period' [-Wmissing-field-initializers] warning: missing initializer for member 'sched_param::sched_ss_init_budget' [-Wmissing-field-initializers] warning: missing initializer for member 'sched_param::sched_ss_max_repl' [-Wmissing-field-initializers] Since the current thread may have interesting non-zero values for these fields, we want to be sure to only change the intended one. Query and modify the current sched_param rather than starting from a zeroed one.
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@ -1293,7 +1293,7 @@ fs::path AbsPathForConfigVal(const fs::path& path, bool net_specific)
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int ScheduleBatchPriority()
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{
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#ifdef SCHED_BATCH
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const static sched_param param{0};
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const static sched_param param{};
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if (int ret = pthread_setschedparam(pthread_self(), SCHED_BATCH, ¶m)) {
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LogPrintf("Failed to pthread_setschedparam: %s\n", strerror(errno));
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return ret;
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