[VOL-4291] Rw-core updates for gRPC migration
Change-Id: I8d5a554409115b29318089671ca4e1ab3fa98810
diff --git a/vendor/github.com/coreos/bbolt/bolt_unix_aix.go b/vendor/github.com/coreos/bbolt/bolt_unix_aix.go
new file mode 100644
index 0000000..a64c16f
--- /dev/null
+++ b/vendor/github.com/coreos/bbolt/bolt_unix_aix.go
@@ -0,0 +1,90 @@
+// +build aix
+
+package bbolt
+
+import (
+ "fmt"
+ "syscall"
+ "time"
+ "unsafe"
+
+ "golang.org/x/sys/unix"
+)
+
+// flock acquires an advisory lock on a file descriptor.
+func flock(db *DB, exclusive bool, timeout time.Duration) error {
+ var t time.Time
+ if timeout != 0 {
+ t = time.Now()
+ }
+ fd := db.file.Fd()
+ var lockType int16
+ if exclusive {
+ lockType = syscall.F_WRLCK
+ } else {
+ lockType = syscall.F_RDLCK
+ }
+ for {
+ // Attempt to obtain an exclusive lock.
+ lock := syscall.Flock_t{Type: lockType}
+ err := syscall.FcntlFlock(fd, syscall.F_SETLK, &lock)
+ if err == nil {
+ return nil
+ } else if err != syscall.EAGAIN {
+ return err
+ }
+
+ // If we timed out then return an error.
+ if timeout != 0 && time.Since(t) > timeout-flockRetryTimeout {
+ return ErrTimeout
+ }
+
+ // Wait for a bit and try again.
+ time.Sleep(flockRetryTimeout)
+ }
+}
+
+// funlock releases an advisory lock on a file descriptor.
+func funlock(db *DB) error {
+ var lock syscall.Flock_t
+ lock.Start = 0
+ lock.Len = 0
+ lock.Type = syscall.F_UNLCK
+ lock.Whence = 0
+ return syscall.FcntlFlock(uintptr(db.file.Fd()), syscall.F_SETLK, &lock)
+}
+
+// mmap memory maps a DB's data file.
+func mmap(db *DB, sz int) error {
+ // Map the data file to memory.
+ b, err := unix.Mmap(int(db.file.Fd()), 0, sz, syscall.PROT_READ, syscall.MAP_SHARED|db.MmapFlags)
+ if err != nil {
+ return err
+ }
+
+ // Advise the kernel that the mmap is accessed randomly.
+ if err := unix.Madvise(b, syscall.MADV_RANDOM); err != nil {
+ return fmt.Errorf("madvise: %s", err)
+ }
+
+ // Save the original byte slice and convert to a byte array pointer.
+ db.dataref = b
+ db.data = (*[maxMapSize]byte)(unsafe.Pointer(&b[0]))
+ db.datasz = sz
+ return nil
+}
+
+// munmap unmaps a DB's data file from memory.
+func munmap(db *DB) error {
+ // Ignore the unmap if we have no mapped data.
+ if db.dataref == nil {
+ return nil
+ }
+
+ // Unmap using the original byte slice.
+ err := unix.Munmap(db.dataref)
+ db.dataref = nil
+ db.data = nil
+ db.datasz = 0
+ return err
+}