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Do not try to use large pages on 32 bit Windows.

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verified to work on windows XP.

fixes  #3379

closes https://github.com/official-stockfish/Stockfish/pull/3380

No functional change.
This commit is contained in:
noobpwnftw 2021-03-03 22:30:23 +08:00 • committed by Joost VandeVondele
parent 7ffae17f85
commit d4b864ff12
1 changed files with 6 additions and 1 deletions
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7
src/misc.cpp
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@ -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;
}