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src: use smart pointers in cares_wrap.cc #23813

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4f84dde
src: use smart pointers in cares_wrap.cc
danbev Oct 22, 2018
c6b4ed9
squash: fix err checks
danbev Oct 23, 2018
a6ee1d3
squash: use std::make_unique where applicable
danbev Oct 25, 2018
bb9f5c7
squash: wrap release in USE macro
danbev Oct 25, 2018
a0c36a5
squash: add missing USE wrapping
danbev Oct 30, 2018
25c405e
squash: add comment about release()
danbev Oct 30, 2018
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40 changes: 22 additions & 18 deletions src/cares_wrap.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -1797,22 +1797,25 @@ static void Query(const FunctionCallbackInfo<Value>& args) {

Local<Object> req_wrap_obj = args[0].As<Object>();
Local<String> string = args[1].As<String>();
Wrap* wrap = new Wrap(channel, req_wrap_obj);
auto wrap = std::make_unique<Wrap>(channel, req_wrap_obj);

node::Utf8Value name(env->isolate(), string);
channel->ModifyActivityQueryCount(1);
int err = wrap->Send(*name);
if (err) {
channel->ModifyActivityQueryCount(-1);
delete wrap;
} else {
// Release ownership of the pointer allowing the ownership to be transferred
USE(wrap.release());
}

args.GetReturnValue().Set(err);
}


void AfterGetAddrInfo(uv_getaddrinfo_t* req, int status, struct addrinfo* res) {
GetAddrInfoReqWrap* req_wrap = static_cast<GetAddrInfoReqWrap*>(req->data);
std::unique_ptr<GetAddrInfoReqWrap> req_wrap {
static_cast<GetAddrInfoReqWrap*>(req->data)};
Environment* env = req_wrap->env();

HandleScope handle_scope(env->isolate());
Expand Down Expand Up @@ -1869,21 +1872,20 @@ void AfterGetAddrInfo(uv_getaddrinfo_t* req, int status, struct addrinfo* res) {
uv_freeaddrinfo(res);

TRACE_EVENT_NESTABLE_ASYNC_END2(
TRACING_CATEGORY_NODE2(dns, native), "lookup", req_wrap,
TRACING_CATEGORY_NODE2(dns, native), "lookup", req_wrap.get(),
"count", n, "verbatim", verbatim);

// Make the callback into JavaScript
req_wrap->MakeCallback(env->oncomplete_string(), arraysize(argv), argv);

delete req_wrap;
}


void AfterGetNameInfo(uv_getnameinfo_t* req,
int status,
const char* hostname,
const char* service) {
GetNameInfoReqWrap* req_wrap = static_cast<GetNameInfoReqWrap*>(req->data);
std::unique_ptr<GetNameInfoReqWrap> req_wrap {
static_cast<GetNameInfoReqWrap*>(req->data)};
Environment* env = req_wrap->env();

HandleScope handle_scope(env->isolate());
Expand All @@ -1904,14 +1906,12 @@ void AfterGetNameInfo(uv_getnameinfo_t* req,
}

TRACE_EVENT_NESTABLE_ASYNC_END2(
TRACING_CATEGORY_NODE2(dns, native), "lookupService", req_wrap,
TRACING_CATEGORY_NODE2(dns, native), "lookupService", req_wrap.get(),
"hostname", TRACE_STR_COPY(hostname),
"service", TRACE_STR_COPY(service));

// Make the callback into JavaScript
req_wrap->MakeCallback(env->oncomplete_string(), arraysize(argv), argv);

delete req_wrap;
}

using ParseIPResult = decltype(static_cast<ares_addr_port_node*>(0)->addr);
Expand Down Expand Up @@ -1971,7 +1971,9 @@ void GetAddrInfo(const FunctionCallbackInfo<Value>& args) {
CHECK(0 && "bad address family");
}

auto req_wrap = new GetAddrInfoReqWrap(env, req_wrap_obj, args[4]->IsTrue());
auto req_wrap = std::make_unique<GetAddrInfoReqWrap>(env,
req_wrap_obj,
args[4]->IsTrue());

struct addrinfo hints;
memset(&hints, 0, sizeof(struct addrinfo));
Expand All @@ -1980,7 +1982,7 @@ void GetAddrInfo(const FunctionCallbackInfo<Value>& args) {
hints.ai_flags = flags;

TRACE_EVENT_NESTABLE_ASYNC_BEGIN2(
TRACING_CATEGORY_NODE2(dns, native), "lookup", req_wrap,
TRACING_CATEGORY_NODE2(dns, native), "lookup", req_wrap.get(),
"hostname", TRACE_STR_COPY(*hostname),
"family",
family == AF_INET ? "ipv4" : family == AF_INET6 ? "ipv6" : "unspec");
Expand All @@ -1990,8 +1992,9 @@ void GetAddrInfo(const FunctionCallbackInfo<Value>& args) {
*hostname,
nullptr,
&hints);
if (err)
delete req_wrap;
if (err == 0)
// Release ownership of the pointer allowing the ownership to be transferred
USE(req_wrap.release());

args.GetReturnValue().Set(err);
}
Expand All @@ -2011,18 +2014,19 @@ void GetNameInfo(const FunctionCallbackInfo<Value>& args) {
CHECK(uv_ip4_addr(*ip, port, reinterpret_cast<sockaddr_in*>(&addr)) == 0 ||
uv_ip6_addr(*ip, port, reinterpret_cast<sockaddr_in6*>(&addr)) == 0);

GetNameInfoReqWrap* req_wrap = new GetNameInfoReqWrap(env, req_wrap_obj);
auto req_wrap = std::make_unique<GetNameInfoReqWrap>(env, req_wrap_obj);

TRACE_EVENT_NESTABLE_ASYNC_BEGIN2(
TRACING_CATEGORY_NODE2(dns, native), "lookupService", req_wrap,
TRACING_CATEGORY_NODE2(dns, native), "lookupService", req_wrap.get(),
"ip", TRACE_STR_COPY(*ip), "port", port);

int err = req_wrap->Dispatch(uv_getnameinfo,
AfterGetNameInfo,
reinterpret_cast<struct sockaddr*>(&addr),
NI_NAMEREQD);
if (err)
delete req_wrap;
if (err == 0)
// Release ownership of the pointer allowing the ownership to be transferred
USE(req_wrap.release());

args.GetReturnValue().Set(err);
}
Expand Down