CPP
cpp
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#include <iostream>
#include <mutex>
#include <thread>
#include <vector>
using namespace std;
mutex g_m1;
mutex g_m2;
int g_var1;
int g_var2;
thread_local int gt_var;
void test1()
{
lock_guard<mutex> lg(g_m1);
cout
<< ++g_var1 << " " << &g_var1 << " "
<< ++gt_var << " " << >_var
<< endl;
}
void test2()
{
thread_local int t_var;
lock_guard<mutex> lg(g_m2);
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