mirror of https://github.com/ceph/go-ceph
58 lines
1.2 KiB
Go
58 lines
1.2 KiB
Go
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package rados
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// #cgo LDFLAGS: -lrados
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// #include <errno.h>
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// #include <stdlib.h>
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// #include <rados/librados.h>
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//
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import "C"
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import (
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"unsafe"
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)
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// ReadOp manages a set of discrete object read actions that will be performed
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// together atomically.
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type ReadOp struct {
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operation
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op C.rados_read_op_t
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}
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// CreateReadOp returns a newly constructed read operation.
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func CreateReadOp() *ReadOp {
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return &ReadOp{
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op: C.rados_create_read_op(),
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}
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}
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// Release the resources associated with this read operation.
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func (r *ReadOp) Release() {
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C.rados_release_read_op(r.op)
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r.op = nil
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r.free()
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}
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// Operate will perform the operation(s).
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func (r *ReadOp) Operate(ioctx *IOContext, oid string, flags OperationFlags) error {
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if err := ioctx.validate(); err != nil {
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return err
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}
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cOid := C.CString(oid)
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defer C.free(unsafe.Pointer(cOid))
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ret := C.rados_read_op_operate(r.op, ioctx.ioctx, cOid, C.int(flags))
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return r.update(readOp, ret)
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}
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func (r *ReadOp) operateCompat(ioctx *IOContext, oid string) error {
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switch err := r.Operate(ioctx, oid, OperationNoFlag).(type) {
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case nil:
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return nil
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case OperationError:
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return err.OpError
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default:
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return err
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}
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}
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