Example #1
0
File: zk.go Project: snaury/gozk
// Create creates a node at the given path with the given data. The
// provided flags may determine features such as whether the node is
// ephemeral or not, or whether it should have a sequence number
// attached to it, and the provided ACLs will determine who can access
// the node and under which circumstances.
//
// The returned path is useful in cases where the created path may differ
// from the requested one, such as when a sequence number is appended
// to it due to the use of the gozk.SEQUENCE flag.
func (conn *Conn) Create(path, value string, flags int, aclv []ACL) (pathCreated string, err error) {
	conn.mutex.RLock()
	defer conn.mutex.RUnlock()
	if conn.handle == nil {
		return "", closingError("close", path)
	}

	cpath := C.CString(path)
	cvalue := C.CString(value)
	defer C.free(unsafe.Pointer(cpath))
	defer C.free(unsafe.Pointer(cvalue))

	caclv := buildACLVector(aclv)
	defer C.deallocate_ACL_vector(caclv)

	// Allocate additional space for the sequence (10 bytes should be enough).
	cpathLen := C.size_t(len(path) + 32)
	cpathCreated := (*C.char)(C.malloc(cpathLen))
	defer C.free(unsafe.Pointer(cpathCreated))

	rc, cerr := C.zoo_create(conn.handle, cpath, cvalue, C.int(len(value)), caclv, C.int(flags), cpathCreated, C.int(cpathLen))
	if rc == C.ZOK {
		pathCreated = C.GoString(cpathCreated)
	} else {
		err = zkError(rc, cerr, "create", path)
	}
	return
}
Example #2
0
File: zk.go Project: snaury/gozk
// SetACL changes the access control list for path.
func (conn *Conn) SetACL(path string, aclv []ACL, version int) error {
	conn.mutex.RLock()
	defer conn.mutex.RUnlock()
	if conn.handle == nil {
		return closingError("setacl", path)
	}

	cpath := C.CString(path)
	defer C.free(unsafe.Pointer(cpath))

	caclv := buildACLVector(aclv)
	defer C.deallocate_ACL_vector(caclv)

	rc, cerr := C.zoo_set_acl(conn.handle, cpath, C.int(version), caclv)
	return zkError(rc, cerr, "setacl", path)
}
Example #3
0
File: zk.go Project: snaury/gozk
func parseACLVector(caclv *C.struct_ACL_vector) []ACL {
	structACLSize := unsafe.Sizeof(C.struct_ACL{})
	aclv := make([]ACL, caclv.count)
	dataStart := uintptr(unsafe.Pointer(caclv.data))
	for i := 0; i != int(caclv.count); i++ {
		caclPos := dataStart + uintptr(i)*structACLSize
		cacl := (*C.struct_ACL)(unsafe.Pointer(caclPos))

		acl := &aclv[i]
		acl.Perms = uint32(cacl.perms)
		acl.Scheme = C.GoString(cacl.id.scheme)
		acl.Id = C.GoString(cacl.id.id)
	}
	C.deallocate_ACL_vector(caclv)

	return aclv
}