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//go:build darwin
package fuse
import (
"syscall"
)
// Direct I/O support for macOS
const (
// macOS doesn't have O_DIRECT, but we can use fcntl with F_NOCACHE
F_NOCACHE = 48
)
func openDirectIO(path string, flags int, mode uint32) (int, error) {
// Open file normally first
fd, err := syscall.Open(path, flags, mode)
if err != nil {
return -1, err
}
// Set F_NOCACHE to bypass buffer cache (similar to O_DIRECT)
_, _, errno := syscall.Syscall(syscall.SYS_FCNTL,
uintptr(fd),
F_NOCACHE,
1) // enable
if errno != 0 {
syscall.Close(fd)
return -1, errno
}
return fd, nil
}
func isDirectIOSupported() bool {
return true
}
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