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| author | Markus Armbruster | 2017-04-26 09:36:38 +0200 |
|---|---|---|
| committer | Markus Armbruster | 2017-05-09 09:14:40 +0200 |
| commit | 4626a19c86c30d96cedbac2bd44ef8103303cb37 (patch) | |
| tree | 6b0046a6d3b2f57eb2cf9fcd562c60372c88b11e | |
| parent | sockets: Prepare inet_parse() for flattened SocketAddress (diff) | |
| download | qemu-4626a19c86c30d96cedbac2bd44ef8103303cb37.tar.gz qemu-4626a19c86c30d96cedbac2bd44ef8103303cb37.tar.xz qemu-4626a19c86c30d96cedbac2bd44ef8103303cb37.zip | |
qapi: New QAPI_CLONE_MEMBERS()
QAPI_CLONE() returns a newly allocated QAPI object. Inconvenient when
we want to clone into an existing object. QAPI_CLONE_MEMBERS() does
exactly that.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1493192202-3184-4-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
| -rw-r--r-- | include/qapi/clone-visitor.h | 14 | ||||
| -rw-r--r-- | qapi/qapi-clone-visitor.c | 13 |
2 files changed, 27 insertions, 0 deletions
diff --git a/include/qapi/clone-visitor.h b/include/qapi/clone-visitor.h index b16177e1ee..a4915c7d57 100644 --- a/include/qapi/clone-visitor.h +++ b/include/qapi/clone-visitor.h @@ -24,6 +24,9 @@ typedef struct QapiCloneVisitor QapiCloneVisitor; void *qapi_clone(const void *src, void (*visit_type)(Visitor *, const char *, void **, Error **)); +void qapi_clone_members(void *dst, const void *src, size_t sz, + void (*visit_type_members)(Visitor *, void *, + Error **)); /* * Deep-clone QAPI object @src of the given @type, and return the result. @@ -36,4 +39,15 @@ void *qapi_clone(const void *src, void (*visit_type)(Visitor *, const char *, (void (*)(Visitor *, const char *, void**, \ Error **))visit_type_ ## type)) +/* + * Copy deep clones of @type members from @src to @dst. + * + * Not usable on QAPI scalars (integers, strings, enums), nor on a + * QAPI object that references the 'any' type. + */ +#define QAPI_CLONE_MEMBERS(type, dst, src) \ + qapi_clone_members(dst, src, sizeof(type), \ + (void (*)(Visitor *, void *, \ + Error **))visit_type_ ## type ## _members) + #endif diff --git a/qapi/qapi-clone-visitor.c b/qapi/qapi-clone-visitor.c index 34086cbfc0..de756bfb33 100644 --- a/qapi/qapi-clone-visitor.c +++ b/qapi/qapi-clone-visitor.c @@ -180,3 +180,16 @@ void *qapi_clone(const void *src, void (*visit_type)(Visitor *, const char *, visit_free(v); return dst; } + +void qapi_clone_members(void *dst, const void *src, size_t sz, + void (*visit_type_members)(Visitor *, void *, + Error **)) +{ + Visitor *v; + + v = qapi_clone_visitor_new(); + memcpy(dst, src, sz); + to_qcv(v)->depth++; + visit_type_members(v, dst, &error_abort); + visit_free(v); +} |