1 files changed, 21 insertions, 0 deletions
diff --git a/bolt_linux.go b/bolt_linux.go
index 4351db5..9aba955 100644
--- a/bolt_linux.go
+++ b/bolt_linux.go
@@ -7,6 +7,27 @@ import (
 
 var odirect = syscall.O_DIRECT
 
+// fdatasync flushes written data to a file descriptor.
 func fdatasync(f *os.File) error {
 	return syscall.Fdatasync(int(f.Fd()))
 }
+
+// flock acquires an advisory lock on a file descriptor.
+func flock(f *os.File) error {
+	return syscall.Flock(int(f.Fd()), syscall.LOCK_EX)
+}
+
+// funlock releases an advisory lock on a file descriptor.
+func funlock(f *os.File) error {
+	return syscall.Flock(int(f.Fd()), syscall.LOCK_UN)
+}
+
+// mmap memory maps a file to a byte slice.
+func mmap(f *os.File, sz int) ([]byte, error) {
+	return syscall.Mmap(int(f.Fd()), 0, sz, syscall.PROT_READ, syscall.MAP_SHARED)
+}
+
+// munmap unmaps a pointer from a file.
+func munmap(b []byte) error {
+	return syscall.Munmap(b)
+}