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use random number in shared file name #72232

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use random number in shared file name #72232

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f875e23
use random number in shared file name
Feb 3, 2022
1857e1a
initialize atomic
Feb 3, 2022
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6 changes: 5 additions & 1 deletion aten/src/ATen/MapAllocator.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@

#include <atomic>
#include <string>
#include <random>
#if ATOMIC_INT_LOCK_FREE == 2
#define AT_ATOMIC_IPC_REFCOUNT 1
#endif
Expand Down Expand Up @@ -34,13 +35,16 @@ static constexpr int64_t map_alloc_alignment = 64;

TORCH_API std::string NewProcessWideShmHandle()
{
static std::atomic<uint64_t> counter;
static std::atomic<uint64_t> counter{0};
static std::random_device rd;
std::string handle = "/torch_";
#ifdef _MSC_VER
handle += c10::guts::to_string(GetCurrentProcessId());
#else
handle += c10::guts::to_string(getpid());
#endif
handle += "_";
handle += c10::guts::to_string(rd());
handle += "_";
handle += c10::guts::to_string(counter.fetch_add(1, std::memory_order_relaxed));
return handle;
Expand Down