[build] rework platform/default directory and add -files.txt for vendored libs

platform/default/src/mbgl/util/thread.cpp

@@ -0,0 +1,37 @@
+#include <mbgl/util/platform.hpp>
+#include <mbgl/util/logging.hpp>
+
+#include <string>
+
+#include <pthread.h>
+#include <sched.h>
+
+namespace mbgl {
+namespace platform {
+
+std::string getCurrentThreadName() {
+    char name[32] = "unknown";
+    pthread_getname_np(pthread_self(), name, sizeof(name));
+
+    return name;
+}
+
+void setCurrentThreadName(const std::string& name) {
+    if (name.size() > 15) { // Linux hard limit (see manpages).
+        pthread_setname_np(pthread_self(), name.substr(0, 15).c_str());
+    } else {
+        pthread_setname_np(pthread_self(), name.c_str());
+    }
+}
+
+void makeThreadLowPriority() {
+    struct sched_param param;
+    param.sched_priority = 0;
+
+    if (sched_setscheduler(0, SCHED_IDLE, &param) != 0) {
+        Log::Warning(Event::General, "Couldn't set thread scheduling policy");
+    }
+}
+
+} // namespace platform
+} // namespace mbgl