Function _mi_os_init

3rd/mimalloc-2.0.9/src/os.c:210–245

}

void _mi_os_init(void)
{
  os_overcommit = false;
  // get the page size
  SYSTEM_INFO si;
  GetSystemInfo(&si);
  if (si.dwPageSize > 0) os_page_size = si.dwPageSize;
  if (si.dwAllocationGranularity > 0) os_alloc_granularity = si.dwAllocationGranularity;
  // get the VirtualAlloc2 function
  HINSTANCE  hDll;
  hDll = LoadLibrary(TEXT("kernelbase.dll"));
  if (hDll != NULL) {
    // use VirtualAlloc2FromApp if possible as it is available to Windows store apps
    pVirtualAlloc2 = (PVirtualAlloc2)(void (*)(void))GetProcAddress(hDll, "VirtualAlloc2FromApp");
    if (pVirtualAlloc2==NULL) pVirtualAlloc2 = (PVirtualAlloc2)(void (*)(void))GetProcAddress(hDll, "VirtualAlloc2");
    FreeLibrary(hDll);
  }
  // NtAllocateVirtualMemoryEx is used for huge page allocation
  hDll = LoadLibrary(TEXT("ntdll.dll"));
  if (hDll != NULL) {
    pNtAllocateVirtualMemoryEx = (PNtAllocateVirtualMemoryEx)(void (*)(void))GetProcAddress(hDll, "NtAllocateVirtualMemoryEx");
    FreeLibrary(hDll);
  }
  // Try to use Win7+ numa API
  hDll = LoadLibrary(TEXT("kernel32.dll"));
  if (hDll != NULL) {
    pGetCurrentProcessorNumberEx = (PGetCurrentProcessorNumberEx)(void (*)(void))GetProcAddress(hDll, "GetCurrentProcessorNumberEx");
    pGetNumaProcessorNodeEx = (PGetNumaProcessorNodeEx)(void (*)(void))GetProcAddress(hDll, "GetNumaProcessorNodeEx");
    pGetNumaNodeProcessorMaskEx = (PGetNumaNodeProcessorMaskEx)(void (*)(void))GetProcAddress(hDll, "GetNumaNodeProcessorMaskEx");
    pGetNumaProcessorNode = (PGetNumaProcessorNode)(void (*)(void))GetProcAddress(hDll, "GetNumaProcessorNode");
    FreeLibrary(hDll);
  }
  if (mi_option_is_enabled(mi_option_large_os_pages) || mi_option_is_enabled(mi_option_reserve_huge_os_pages)) {
    mi_win_enable_large_os_pages();
  }
}
#elif defined(__wasi__)
void _mi_os_init(void) {
  os_overcommit = false;