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Query for LargePageMinimum on Windows

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This commit is contained in:
tevador 2019-05-06 18:18:52 +02:00
parent c1314dc2a2
commit a78429202b
1 changed files with 6 additions and 2 deletions
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8
src/virtual_memory.cpp
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@ -88,7 +88,7 @@ void* allocExecutableMemory(std::size_t bytes) {
return mem; return mem;
} }
constexpr std::size_t align(std::size_t pos, uint32_t align) { constexpr std::size_t align(std::size_t pos, std::size_t align) {
return ((pos - 1) / align + 1) * align; return ((pos - 1) / align + 1) * align;
} }
@ -96,7 +96,11 @@ void* allocLargePagesMemory(std::size_t bytes) {
void* mem; void* mem;
#ifdef _WIN32 #ifdef _WIN32
setPrivilege("SeLockMemoryPrivilege", 1); setPrivilege("SeLockMemoryPrivilege", 1);
mem = VirtualAlloc(NULL, align(bytes, 2 * 1024 * 1024), MEM_COMMIT | MEM_RESERVE | MEM_LARGE_PAGES, PAGE_READWRITE); auto pageMinimum = GetLargePageMinimum();
if (pageMinimum > 0)
mem = VirtualAlloc(NULL, align(bytes, pageMinimum), MEM_COMMIT | MEM_RESERVE | MEM_LARGE_PAGES, PAGE_READWRITE);
else
throw std::runtime_error("allocLargePagesMemory - Large pages are not supported");
if (mem == nullptr) if (mem == nullptr)
throw std::runtime_error(getErrorMessage("allocLargePagesMemory - VirtualAlloc")); throw std::runtime_error(getErrorMessage("allocLargePagesMemory - VirtualAlloc"));
#else #else