From b0911ecb45dae20898929cf58c279666056e528e Mon Sep 17 00:00:00 2001
From: sneaxiy <32832641+sneaxiy@users.noreply.github.com>
Date: Mon, 17 Apr 2023 16:30:55 +0800
Subject: [PATCH] Add unique counter for shared memory used in DataLoader 
 (#52976)

* fix ipc counter

* fix missing std::to_string
---
 paddle/fluid/memory/allocation/mmap_allocator.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/paddle/fluid/memory/allocation/mmap_allocator.cc b/paddle/fluid/memory/allocation/mmap_allocator.cc
index 1197098a4d8..2e091fa1b2f 100644
--- a/paddle/fluid/memory/allocation/mmap_allocator.cc
+++ b/paddle/fluid/memory/allocation/mmap_allocator.cc
@@ -20,6 +20,7 @@
 #include <stdlib.h>
 #include <sys/mman.h>
 
+#include <atomic>
 #include <random>
 #include <string>
 
@@ -34,12 +35,15 @@ namespace allocation {
 
 std::string GetIPCName() {
   static std::random_device rd;
+  static std::atomic<uint64_t> counter{0};
   std::string handle = "/paddle_";
 #ifdef _WIN32
   handle += std::to_string(GetCurrentProcessId());
 #else
   handle += std::to_string(getpid());
 #endif
+  handle += "_";
+  handle += std::to_string(counter.fetch_add(1));
   handle += "_";
   handle += std::to_string(rd());
   return handle;
-- 
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