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vm: use FILE_READ_ATTRIBUTES to make exists? faster.

master
John Benediktsson 2020-02-25 11:05:17 -08:00
parent 08dd854b15
commit 0d6096df0a
1 changed files with 3 additions and 4 deletions
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7
vm/os-windows.cpp
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@ -37,15 +37,14 @@ void factor_vm::ffi_dlclose(dll* dll) {
BOOL factor_vm::windows_stat(vm_char* path) { BOOL factor_vm::windows_stat(vm_char* path) {
BY_HANDLE_FILE_INFORMATION bhfi; BY_HANDLE_FILE_INFORMATION bhfi;
HANDLE h = CreateFileW(path, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL, HANDLE h = CreateFileW(path, FILE_READ_ATTRIBUTES, 0, NULL,
OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL); OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
if (h == INVALID_HANDLE_VALUE) { if (h == INVALID_HANDLE_VALUE) {
// FindFirstFile is the only call that can stat c:\pagefile.sys // FindFirstFile is the only call that can stat c:\pagefile.sys
WIN32_FIND_DATA st; WIN32_FIND_DATA st;
HANDLE h; h = FindFirstFile(path, &st);
if (h == INVALID_HANDLE_VALUE)
if (INVALID_HANDLE_VALUE == (h = FindFirstFile(path, &st)))
return false; return false;
FindClose(h); FindClose(h);
return true; return true;