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tag: v0.5.6
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#include <node.h>
#include <handle_wrap.h>
#define UNWRAP \
assert(!args.Holder().IsEmpty()); \
assert(args.Holder()->InternalFieldCount() > 0); \
TimerWrap* wrap = \
static_cast<TimerWrap*>(args.Holder()->GetPointerFromInternalField(0)); \
if (!wrap) { \
SetErrno(UV_EBADF); \
return scope.Close(Integer::New(-1)); \
}
namespace node {
using v8::Object;
using v8::Handle;
using v8::Local;
using v8::Persistent;
using v8::Value;
using v8::HandleScope;
using v8::FunctionTemplate;
using v8::String;
using v8::Function;
using v8::TryCatch;
using v8::Context;
using v8::Arguments;
using v8::Integer;
class TimerWrap : public HandleWrap {
public:
static void Initialize(Handle<Object> target) {
HandleScope scope;
HandleWrap::Initialize(target);
Local<FunctionTemplate> constructor = FunctionTemplate::New(New);
constructor->InstanceTemplate()->SetInternalFieldCount(1);
constructor->SetClassName(String::NewSymbol("Timer"));
NODE_SET_PROTOTYPE_METHOD(constructor, "close", HandleWrap::Close);
NODE_SET_PROTOTYPE_METHOD(constructor, "start", Start);
NODE_SET_PROTOTYPE_METHOD(constructor, "stop", Stop);
NODE_SET_PROTOTYPE_METHOD(constructor, "setRepeat", SetRepeat);
NODE_SET_PROTOTYPE_METHOD(constructor, "getRepeat", GetRepeat);
NODE_SET_PROTOTYPE_METHOD(constructor, "again", Again);
target->Set(String::NewSymbol("Timer"), constructor->GetFunction());
}
private:
static Handle<Value> New(const Arguments& args) {
// This constructor should not be exposed to public javascript.
// Therefore we assert that we are not trying to call this as a
// normal function.
assert(args.IsConstructCall());
HandleScope scope;
TimerWrap *wrap = new TimerWrap(args.This());
assert(wrap);
return scope.Close(args.This());
}
TimerWrap(Handle<Object> object)
: HandleWrap(object, (uv_handle_t*) &handle_) {
active_ = false;
int r = uv_timer_init(uv_default_loop(), &handle_);
handle_.data = this;
// uv_timer_init adds a loop reference. (That is, it calls uv_ref.) This
// is not the behavior we want in Node. Timers should not increase the
// ref count of the loop except when active.
uv_unref(uv_default_loop());
}
~TimerWrap() {
if (!active_) uv_ref(uv_default_loop());
}
void StateChange() {
bool was_active = active_;
active_ = uv_is_active((uv_handle_t*) &handle_);
if (!was_active && active_) {
// If our state is changing from inactive to active, we
// increase the loop's reference count.
uv_ref(uv_default_loop());
} else if (was_active && !active_) {
// If our state is changing from active to inactive, we
// decrease the loop's reference count.
uv_unref(uv_default_loop());
}
}
static Handle<Value> Start(const Arguments& args) {
HandleScope scope;
UNWRAP
int64_t timeout = args[0]->IntegerValue();
int64_t repeat = args[1]->IntegerValue();
int r = uv_timer_start(&wrap->handle_, OnTimeout, timeout, repeat);
// Error starting the timer.
if (r) SetErrno(uv_last_error(uv_default_loop()).code);
wrap->StateChange();
return scope.Close(Integer::New(r));
}
static Handle<Value> Stop(const Arguments& args) {
HandleScope scope;
UNWRAP
int r = uv_timer_stop(&wrap->handle_);
if (r) SetErrno(uv_last_error(uv_default_loop()).code);
wrap->StateChange();
return scope.Close(Integer::New(r));
}
static Handle<Value> Again(const Arguments& args) {
HandleScope scope;
UNWRAP
int r = uv_timer_again(&wrap->handle_);
if (r) SetErrno(uv_last_error(uv_default_loop()).code);
wrap->StateChange();
return scope.Close(Integer::New(r));
}
static Handle<Value> SetRepeat(const Arguments& args) {
HandleScope scope;
UNWRAP
int64_t repeat = args[0]->IntegerValue();
uv_timer_set_repeat(&wrap->handle_, repeat);
return scope.Close(Integer::New(0));
}
static Handle<Value> GetRepeat(const Arguments& args) {
HandleScope scope;
UNWRAP
int64_t repeat = uv_timer_get_repeat(&wrap->handle_);
if (repeat < 0) SetErrno(uv_last_error(uv_default_loop()).code);
return scope.Close(Integer::New(repeat));
}
static void OnTimeout(uv_timer_t* handle, int status) {
HandleScope scope;
TimerWrap* wrap = static_cast<TimerWrap*>(handle->data);
assert(wrap);
wrap->StateChange();
Local<Value> argv[1] = { Integer::New(status) };
MakeCallback(wrap->object_, "ontimeout", 1, argv);
}
uv_timer_t handle_;
// This member is set false initially. When the timer is turned
// on uv_ref is called. When the timer is turned off uv_unref is
// called. Used to mirror libev semantics.
bool active_;
};
} // namespace node
NODE_MODULE(node_timer_wrap, node::TimerWrap::Initialize);
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