Yaya48
cf256aa081
Upstream: https://gitlab.com/qemu-project/qemu.git Upstream-Commit: d2e570cc0f97b936902a5b1b86b73c0f5998b475
63 lines
2.4 KiB
C
63 lines
2.4 KiB
C
/*
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* Clone Visitor
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*
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* Copyright (C) 2016 Red Hat, Inc.
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#ifndef QAPI_CLONE_VISITOR_H
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#define QAPI_CLONE_VISITOR_H
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#include "qapi/error.h"
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#include "qapi/visitor.h"
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/*
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* The clone visitor is for direct use only by the QAPI_CLONE() macro;
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* it requires that the root visit occur on an object, list, or
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* alternate, and is not usable directly on built-in QAPI types.
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*/
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typedef struct QapiCloneVisitor QapiCloneVisitor;
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Visitor *qapi_clone_visitor_new(void);
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Visitor *qapi_clone_members_visitor_new(void);
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/*
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* Deep-clone QAPI object @src of the given @type, and return the result.
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*
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* Not usable on QAPI scalars (integers, strings, enums), nor on a
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* QAPI object that references the 'any' type. Safe when @src is NULL.
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*/
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#define QAPI_CLONE(type, src) \
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({ \
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Visitor *v_; \
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type *dst_ = (type *) (src); /* Cast away const */ \
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\
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if (dst_) { \
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v_ = qapi_clone_visitor_new(); \
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visit_type_ ## type(v_, NULL, &dst_, &error_abort); \
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visit_free(v_); \
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} \
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dst_; \
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})
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/*
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* Copy deep clones of @type members from @src to @dst.
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*
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* Not usable on QAPI scalars (integers, strings, enums), nor on a
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* QAPI object that references the 'any' type.
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*/
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#define QAPI_CLONE_MEMBERS(type, dst, src) \
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({ \
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Visitor *v_; \
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\
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v_ = qapi_clone_members_visitor_new(); \
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*(type *)(dst) = *(src); \
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visit_type_ ## type ## _members(v_, (type *)(dst), &error_abort); \
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visit_free(v_); \
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})
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#endif
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