`std::atomic`¶

Atomic Instructions (1)¶

Simple integers don’t need a mutex ⟶ atomic instructions

GCC: atomic built-ins¶

static int global;
void inc() {
  __sync_fetch_and_add(&global, 1);
}

Windows¶

static LONG global;
void inc() {
  InterlockedIncrement(&global);
}

#include <atomic>
std::atomic<int> global(0);
void inc() {
  global++;
}