diff options
Diffstat (limited to 'src/common/sparse_large_vector.cpp')
| -rw-r--r-- | src/common/sparse_large_vector.cpp | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/common/sparse_large_vector.cpp b/src/common/sparse_large_vector.cpp index ce6455a235..745575a880 100644 --- a/src/common/sparse_large_vector.cpp +++ b/src/common/sparse_large_vector.cpp @@ -96,6 +96,21 @@ bool CommitVectorPage(uintptr_t addr, bool write) noexcept { #ifndef MAP_NOCORE #define MAP_NOCORE 0 #endif +#ifndef MADV_FREE +#define MADV_FREE MADV_DONTNEED +#endif + +void DecommitVectorPage(uintptr_t base) noexcept { +#if defined(_WIN32) + VirtualFree(reinterpret_cast<LPVOID>(base), HostPageSize, MEM_DECOMMIT); +#elif defined(__linux__) + // Linux's MADV_DONTNEED zeros out pages for us + madvise(reinterpret_cast<void*>(base), HostPageSize, MADV_DONTNEED); +#else + madvise(reinterpret_cast<void*>(base), HostPageSize, MADV_FREE); + std::memset(reinterpret_cast<void*>(base), 0, HostPageSize); +#endif +} void* AllocateMemoryPages(std::size_t size) noexcept { if (auto page = HostPageSize; size % page != 0) { |