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Diffstat (limited to 'erts/emulator/drivers/win32')
-rw-r--r--erts/emulator/drivers/win32/win_efile.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/erts/emulator/drivers/win32/win_efile.c b/erts/emulator/drivers/win32/win_efile.c
index 319065f57b..d693d7d593 100644
--- a/erts/emulator/drivers/win32/win_efile.c
+++ b/erts/emulator/drivers/win32/win_efile.c
@@ -698,6 +698,7 @@ efile_openfile(Efile_error* errInfo, /* Where to return error codes. */
HANDLE fd; /* Handle to open file. */
DWORD access; /* Access mode: GENERIC_READ, GENERIC_WRITE. */
DWORD crFlags;
+ DWORD flagsAndAttrs = FILE_ATTRIBUTE_NORMAL;
WCHAR *wname = (WCHAR *) name;
switch (flags & (EFILE_MODE_READ|EFILE_MODE_WRITE)) {
@@ -719,6 +720,10 @@ efile_openfile(Efile_error* errInfo, /* Where to return error codes. */
return 0;
}
+ if (flags & EFILE_MODE_SYNC) {
+ flagsAndAttrs = FILE_FLAG_WRITE_THROUGH;
+ }
+
if (flags & EFILE_MODE_APPEND) {
crFlags = OPEN_ALWAYS;
}
@@ -727,7 +732,7 @@ efile_openfile(Efile_error* errInfo, /* Where to return error codes. */
}
fd = CreateFileW(wname, access,
FILE_SHARE_FLAGS,
- NULL, crFlags, FILE_ATTRIBUTE_NORMAL, NULL);
+ NULL, crFlags, flagsAndAttrs, NULL);
/*
* Check for errors.