mirror of https://github.com/ceph/go-ceph
60 lines
1.3 KiB
Go
60 lines
1.3 KiB
Go
|
package rados
|
||
|
|
|
||
|
|
// #cgo LDFLAGS: -lrados
|
||
|
|
// #include <rados/librados.h>
|
||
|
|
// #include <stdlib.h>
|
||
|
|
//
|
||
|
|
import "C"
|
||
|
|
|
||
|
|
import (
|
||
|
|
"unsafe"
|
||
|
|
)
|
||
|
|
|
||
|
|
// WriteOpCmpExtStep holds result of the CmpExt write operation.
|
||
|
|
// Result is valid only after Operate() was called.
|
||
|
|
type WriteOpCmpExtStep struct {
|
||
|
|
// C returned data:
|
||
|
|
prval *C.int
|
||
|
|
|
||
|
|
// Result of the CmpExt write operation.
|
||
|
|
Result int
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *WriteOpCmpExtStep) update() error {
|
||
|
|
s.Result = int(*s.prval)
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (s *WriteOpCmpExtStep) free() {
|
||
|
|
C.free(unsafe.Pointer(s.prval))
|
||
|
|
s.prval = nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func newWriteOpCmpExtStep() *WriteOpCmpExtStep {
|
||
|
|
return &WriteOpCmpExtStep{
|
||
|
|
prval: (*C.int)(C.malloc(C.sizeof_int)),
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// CmpExt ensures that given object range (extent) satisfies comparison.
|
||
|
|
//
|
||
|
|
// Implements:
|
||
|
|
// void rados_write_op_cmpext(rados_write_op_t write_op,
|
||
|
|
// const char * cmp_buf,
|
||
|
|
// size_t cmp_len,
|
||
|
|
// uint64_t off,
|
||
|
|
// int * prval);
|
||
|
|
func (w *WriteOp) CmpExt(b []byte, offset uint64) *WriteOpCmpExtStep {
|
||
|
|
oe := newWriteStep(b, 0, offset)
|
||
|
|
cmpExtStep := newWriteOpCmpExtStep()
|
||
|
|
w.steps = append(w.steps, oe, cmpExtStep)
|
||
|
|
C.rados_write_op_cmpext(
|
||
|
|
w.op,
|
||
|
|
oe.cBuffer,
|
||
|
|
oe.cDataLen,
|
||
|
|
oe.cOffset,
|
||
|
|
cmpExtStep.prval)
|
||
|
|
|
||
|
|
return cmpExtStep
|
||
|
|
}
|