From d4b864ff126e4a5784c9d7f636be057c247738f1 Mon Sep 17 00:00:00 2001 From: noobpwnftw Date: Wed, 3 Mar 2021 22:30:23 +0800 Subject: [PATCH] Do not try to use large pages on 32 bit Windows. verified to work on windows XP. fixes #3379 closes https://github.com/official-stockfish/Stockfish/pull/3380 No functional change. --- src/misc.cpp | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/src/misc.cpp b/src/misc.cpp index 834e909b..7600fc11 100644 --- a/src/misc.cpp +++ b/src/misc.cpp @@ -362,7 +362,7 @@ void std_aligned_free(void* ptr) { /// aligned_large_pages_alloc() will return suitably aligned memory, if possible using large pages. #if defined(_WIN32) - +#if defined(_WIN64) static void* aligned_large_pages_alloc_win(size_t allocSize) { HANDLE hProcessToken { }; @@ -407,15 +407,20 @@ static void* aligned_large_pages_alloc_win(size_t allocSize) { return mem; } +#endif void* aligned_large_pages_alloc(size_t allocSize) { +#if defined(_WIN64) // Try to allocate large pages void* mem = aligned_large_pages_alloc_win(allocSize); // Fall back to regular, page aligned, allocation if necessary if (!mem) mem = VirtualAlloc(NULL, allocSize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); +#else + void* mem = VirtualAlloc(NULL, allocSize, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE); +#endif return mem; } -- 2.39.2