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Revert "handle_wrap: IsRefed -> Unrefed, no isAlive check"
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This reverts commit 9bb5a5e.

This API is not suitable because it depended on being able to
potentially access the handle's flag after the handle was already
cleaned up. Since this is not actually possible (obviously, oops)
this newer API no longer makes much sense, and the older API is more
suitable.

API comparison:
IsRefed -> Has a strong reference AND is alive. (Deterministic)
Unrefed -> Has a weak reference OR is dead. (Less deterministic)

Refs: nodejs#6395
Refs: nodejs#6204
Refs: nodejs#6401
Refs: nodejs#6382
Fixes: nodejs#6381

PR-URL: nodejs#6546
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Ben Noordhuis <[email protected]>
Reviewed-By: Trevor Norris <[email protected]>

Conflicts:
	src/handle_wrap.cc
	test/parallel/test-handle-wrap-isrefed-tty.js
	test/parallel/test-handle-wrap-isrefed.js
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Fishrock123 committed May 11, 2016
1 parent 738a1d6 commit 96a9439
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Showing 11 changed files with 50 additions and 63 deletions.
4 changes: 2 additions & 2 deletions src/handle_wrap.cc
Original file line number Diff line number Diff line change
Expand Up @@ -33,9 +33,9 @@ void HandleWrap::Unref(const FunctionCallbackInfo<Value>& args) {
}


void HandleWrap::Unrefed(const FunctionCallbackInfo<Value>& args) {
void HandleWrap::IsRefed(const FunctionCallbackInfo<Value>& args) {
HandleWrap* wrap = Unwrap<HandleWrap>(args.Holder());
args.GetReturnValue().Set(!HasRef(wrap));
args.GetReturnValue().Set(HasRef(wrap));
}


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2 changes: 1 addition & 1 deletion src/handle_wrap.h
Original file line number Diff line number Diff line change
Expand Up @@ -35,7 +35,7 @@ class HandleWrap : public AsyncWrap {
static void Close(const v8::FunctionCallbackInfo<v8::Value>& args);
static void Ref(const v8::FunctionCallbackInfo<v8::Value>& args);
static void Unref(const v8::FunctionCallbackInfo<v8::Value>& args);
static void Unrefed(const v8::FunctionCallbackInfo<v8::Value>& args);
static void IsRefed(const v8::FunctionCallbackInfo<v8::Value>& args);

static inline bool IsAlive(const HandleWrap* wrap) {
return wrap != nullptr && wrap->state_ != kClosed;
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2 changes: 1 addition & 1 deletion src/pipe_wrap.cc
Original file line number Diff line number Diff line change
Expand Up @@ -80,7 +80,7 @@ void PipeWrap::Initialize(Local<Object> target,
env->SetProtoMethod(t, "close", HandleWrap::Close);
env->SetProtoMethod(t, "unref", HandleWrap::Unref);
env->SetProtoMethod(t, "ref", HandleWrap::Ref);
env->SetProtoMethod(t, "unrefed", HandleWrap::Unrefed);
env->SetProtoMethod(t, "isRefed", HandleWrap::IsRefed);

StreamWrap::AddMethods(env, t);

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2 changes: 1 addition & 1 deletion src/process_wrap.cc
Original file line number Diff line number Diff line change
Expand Up @@ -40,7 +40,7 @@ class ProcessWrap : public HandleWrap {

env->SetProtoMethod(constructor, "ref", HandleWrap::Ref);
env->SetProtoMethod(constructor, "unref", HandleWrap::Unref);
env->SetProtoMethod(constructor, "unrefed", HandleWrap::Unrefed);
env->SetProtoMethod(constructor, "isRefed", HandleWrap::IsRefed);

target->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "Process"),
constructor->GetFunction());
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2 changes: 1 addition & 1 deletion src/signal_wrap.cc
Original file line number Diff line number Diff line change
Expand Up @@ -32,7 +32,7 @@ class SignalWrap : public HandleWrap {
env->SetProtoMethod(constructor, "close", HandleWrap::Close);
env->SetProtoMethod(constructor, "ref", HandleWrap::Ref);
env->SetProtoMethod(constructor, "unref", HandleWrap::Unref);
env->SetProtoMethod(constructor, "unrefed", HandleWrap::Unrefed);
env->SetProtoMethod(constructor, "isRefed", HandleWrap::IsRefed);
env->SetProtoMethod(constructor, "start", Start);
env->SetProtoMethod(constructor, "stop", Stop);

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2 changes: 1 addition & 1 deletion src/tcp_wrap.cc
Original file line number Diff line number Diff line change
Expand Up @@ -87,7 +87,7 @@ void TCPWrap::Initialize(Local<Object> target,

env->SetProtoMethod(t, "ref", HandleWrap::Ref);
env->SetProtoMethod(t, "unref", HandleWrap::Unref);
env->SetProtoMethod(t, "unrefed", HandleWrap::Unrefed);
env->SetProtoMethod(t, "isRefed", HandleWrap::IsRefed);

StreamWrap::AddMethods(env, t, StreamBase::kFlagHasWritev);

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2 changes: 1 addition & 1 deletion src/timer_wrap.cc
Original file line number Diff line number Diff line change
Expand Up @@ -39,7 +39,7 @@ class TimerWrap : public HandleWrap {
env->SetProtoMethod(constructor, "close", HandleWrap::Close);
env->SetProtoMethod(constructor, "ref", HandleWrap::Ref);
env->SetProtoMethod(constructor, "unref", HandleWrap::Unref);
env->SetProtoMethod(constructor, "unrefed", HandleWrap::Unrefed);
env->SetProtoMethod(constructor, "isRefed", HandleWrap::IsRefed);

env->SetProtoMethod(constructor, "start", Start);
env->SetProtoMethod(constructor, "stop", Stop);
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2 changes: 1 addition & 1 deletion src/tty_wrap.cc
Original file line number Diff line number Diff line change
Expand Up @@ -36,7 +36,7 @@ void TTYWrap::Initialize(Local<Object> target,

env->SetProtoMethod(t, "close", HandleWrap::Close);
env->SetProtoMethod(t, "unref", HandleWrap::Unref);
env->SetProtoMethod(t, "unrefed", HandleWrap::Unrefed);
env->SetProtoMethod(t, "isRefed", HandleWrap::IsRefed);

StreamWrap::AddMethods(env, t, StreamBase::kFlagNoShutdown);

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2 changes: 1 addition & 1 deletion src/udp_wrap.cc
Original file line number Diff line number Diff line change
Expand Up @@ -108,7 +108,7 @@ void UDPWrap::Initialize(Local<Object> target,

env->SetProtoMethod(t, "ref", HandleWrap::Ref);
env->SetProtoMethod(t, "unref", HandleWrap::Unref);
env->SetProtoMethod(t, "unrefed", HandleWrap::Unrefed);
env->SetProtoMethod(t, "isRefed", HandleWrap::IsRefed);

target->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "UDP"), t->GetFunction());
env->set_udp_constructor_function(t->GetFunction());
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13 changes: 6 additions & 7 deletions test/parallel/test-handle-wrap-isrefed-tty.js
Original file line number Diff line number Diff line change
Expand Up @@ -9,19 +9,18 @@ function makeAssert(message) {
strictEqual(actual, expected, message);
};
}
const assert = makeAssert('unrefed() not working on tty_wrap');
const assert = makeAssert('isRefed() not working on tty_wrap');

if (process.argv[2] === 'child') {
// Test tty_wrap in piped child to guarentee stdin being a TTY.
const ReadStream = require('tty').ReadStream;
const tty = new ReadStream(0);
assert(Object.getPrototypeOf(tty._handle).hasOwnProperty('unrefed'), true);
assert(tty._handle.unrefed(), false);
assert(Object.getPrototypeOf(tty._handle).hasOwnProperty('isRefed'), true);
assert(tty._handle.isRefed(), true);
tty.unref();
assert(tty._handle.unrefed(), true);
tty._handle.close(common.mustCall(() => assert(tty._handle.unrefed(), true)));
tty._handle.close(common.fail);
assert(tty._handle.unrefed(), true);
assert(tty._handle.isRefed(), false);
tty._handle.close(
common.mustCall(() => assert(tty._handle.isRefed(), false)));
return;
}

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80 changes: 34 additions & 46 deletions test/parallel/test-handle-wrap-isrefed.js
Original file line number Diff line number Diff line change
Expand Up @@ -12,102 +12,90 @@ function makeAssert(message) {

// child_process
{
const assert = makeAssert('unrefed() not working on process_wrap');
const assert = makeAssert('isRefed() not working on process_wrap');
const spawn = require('child_process').spawn;
const cmd = common.isWindows ? 'rundll32' : 'ls';
const cp = spawn(cmd);
assert(Object.getPrototypeOf(cp._handle).hasOwnProperty('unrefed'), true);
assert(cp._handle.unrefed(), false);
assert(Object.getPrototypeOf(cp._handle).hasOwnProperty('isRefed'), true);
assert(cp._handle.isRefed(), true);
cp.unref();
assert(cp._handle.unrefed(), true);
assert(cp._handle.isRefed(), false);
cp.ref();
assert(cp._handle.unrefed(), false);
cp._handle.close(common.mustCall(() => assert(cp._handle.unrefed(), true)));
cp._handle.close(common.fail);
assert(cp._handle.unrefed(), false);
assert(cp._handle.isRefed(), true);
cp._handle.close(common.mustCall(() => assert(cp._handle.isRefed(), false)));
}


// dgram
{
const assert = makeAssert('unrefed() not working on udp_wrap');
const assert = makeAssert('isRefed() not working on udp_wrap');
const dgram = require('dgram');

const sock4 = dgram.createSocket('udp4');
assert(Object.getPrototypeOf(sock4._handle).hasOwnProperty('unrefed'), true);
assert(sock4._handle.unrefed(), false);
assert(Object.getPrototypeOf(sock4._handle).hasOwnProperty('isRefed'), true);
assert(sock4._handle.isRefed(), true);
sock4.unref();
assert(sock4._handle.unrefed(), true);
assert(sock4._handle.isRefed(), false);
sock4.ref();
assert(sock4._handle.unrefed(), false);
assert(sock4._handle.isRefed(), true);
sock4._handle.close(
common.mustCall(() => assert(sock4._handle.unrefed(), true)));
sock4._handle.close(common.fail);
assert(sock4._handle.unrefed(), false);
common.mustCall(() => assert(sock4._handle.isRefed(), false)));

const sock6 = dgram.createSocket('udp6');
assert(Object.getPrototypeOf(sock6._handle).hasOwnProperty('unrefed'), true);
assert(sock6._handle.unrefed(), false);
assert(Object.getPrototypeOf(sock6._handle).hasOwnProperty('isRefed'), true);
assert(sock6._handle.isRefed(), true);
sock6.unref();
assert(sock6._handle.unrefed(), true);
assert(sock6._handle.isRefed(), false);
sock6.ref();
assert(sock6._handle.unrefed(), false);
assert(sock6._handle.isRefed(), true);
sock6._handle.close(
common.mustCall(() => assert(sock6._handle.unrefed(), true)));
sock6._handle.close(common.fail);
assert(sock6._handle.unrefed(), false);
common.mustCall(() => assert(sock6._handle.isRefed(), false)));
}


// pipe
{
const assert = makeAssert('unrefed() not working on pipe_wrap');
const assert = makeAssert('isRefed() not working on pipe_wrap');
const Pipe = process.binding('pipe_wrap').Pipe;
const handle = new Pipe();
assert(Object.getPrototypeOf(handle).hasOwnProperty('unrefed'), true);
assert(handle.unrefed(), false);
assert(Object.getPrototypeOf(handle).hasOwnProperty('isRefed'), true);
assert(handle.isRefed(), true);
handle.unref();
assert(handle.unrefed(), true);
assert(handle.isRefed(), false);
handle.ref();
assert(handle.unrefed(), false);
handle.close(common.mustCall(() => assert(handle.unrefed(), true)));
handle.close(common.fail);
assert(handle.unrefed(), false);
assert(handle.isRefed(), true);
handle.close(common.mustCall(() => assert(handle.isRefed(), false)));
}


// tcp
{
const assert = makeAssert('unrefed() not working on tcp_wrap');
const assert = makeAssert('isRefed() not working on tcp_wrap');
const net = require('net');
const server = net.createServer(() => {}).listen(common.PORT);
assert(Object.getPrototypeOf(server._handle).hasOwnProperty('unrefed'), true);
assert(server._handle.unrefed(), false);
assert(Object.getPrototypeOf(server._handle).hasOwnProperty('isRefed'), true);
assert(server._handle.isRefed(), true);
assert(server._unref, false);
server.unref();
assert(server._handle.unrefed(), true);
assert(server._handle.isRefed(), false);
assert(server._unref, true);
server.ref();
assert(server._handle.unrefed(), false);
assert(server._handle.isRefed(), true);
assert(server._unref, false);
server._handle.close(
common.mustCall(() => assert(server._handle.unrefed(), true)));
server._handle.close(common.fail);
assert(server._handle.unrefed(), false);
common.mustCall(() => assert(server._handle.isRefed(), false)));
}


// timers
{
const assert = makeAssert('unrefed() not working on timer_wrap');
const assert = makeAssert('isRefed() not working on timer_wrap');
const timer = setTimeout(() => {}, 500);
timer.unref();
assert(Object.getPrototypeOf(timer._handle).hasOwnProperty('unrefed'), true);
assert(timer._handle.unrefed(), true);
assert(Object.getPrototypeOf(timer._handle).hasOwnProperty('isRefed'), true);
assert(timer._handle.isRefed(), false);
timer.ref();
assert(timer._handle.unrefed(), false);
assert(timer._handle.isRefed(), true);
timer._handle.close(
common.mustCall(() => assert(timer._handle.unrefed(), true)));
timer._handle.close(common.fail);
assert(timer._handle.unrefed(), false);
common.mustCall(() => assert(timer._handle.isRefed(), false)));
}

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