93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
#include <node.h>
|
|
#include <nan.h>
|
|
#include <stdlib.h>
|
|
#include "./pow.h"
|
|
|
|
using node::Buffer;
|
|
using v8::Handle;
|
|
using v8::Local;
|
|
using v8::FunctionTemplate;
|
|
using v8::Function;
|
|
using v8::Value;
|
|
using v8::Object;
|
|
using v8::String;
|
|
using v8::Integer;
|
|
|
|
#define MAX_SAFE_JS_INTEGER 9007199254740991
|
|
|
|
class PowWorker : public NanAsyncWorker {
|
|
public:
|
|
PowWorker(NanCallback* callback,
|
|
size_t pool_size,
|
|
uint64_t target,
|
|
uint8_t* initial_hash)
|
|
: NanAsyncWorker(callback),
|
|
pool_size(pool_size),
|
|
target(target),
|
|
initial_hash(initial_hash) {}
|
|
~PowWorker() {
|
|
free(initial_hash);
|
|
}
|
|
|
|
// Executed inside the worker-thread.
|
|
// It is not safe to access V8, or V8 data structures
|
|
// here, so everything we need for input and output
|
|
// should go on `this`.
|
|
void Execute () {
|
|
error = pow(pool_size, target, initial_hash, MAX_SAFE_JS_INTEGER, &nonce);
|
|
}
|
|
|
|
// Executed when the async work is complete
|
|
// this function will be run inside the main event loop
|
|
// so it is safe to use V8 again
|
|
void HandleOKCallback () {
|
|
NanScope();
|
|
if (error) {
|
|
Local<Value> argv[] = {NanError("Max safe integer overflow")};
|
|
callback->Call(1, argv);
|
|
} else {
|
|
Local<Value> argv[] = {NanNull(), NanNew<Integer>(nonce)};
|
|
callback->Call(2, argv);
|
|
}
|
|
}
|
|
|
|
private:
|
|
size_t pool_size;
|
|
uint64_t target;
|
|
uint8_t* initial_hash;
|
|
uint64_t nonce;
|
|
int error;
|
|
};
|
|
|
|
NAN_METHOD(PowAsync) {
|
|
NanScope();
|
|
|
|
NanCallback *callback = new NanCallback(args[3].As<Function>());
|
|
size_t pool_size = args[0]->Uint32Value();
|
|
uint64_t target = args[1]->IntegerValue();
|
|
size_t length = Buffer::Length(args[2]->ToObject());
|
|
char* buf = Buffer::Data(args[2]->ToObject());
|
|
uint8_t* initial_hash = (uint8_t *)malloc(length);
|
|
|
|
if (initial_hash == NULL) {
|
|
Local<Value> argv[] = {NanError("Cannot allocate memory")};
|
|
callback->Call(1, argv);
|
|
} else {
|
|
memcpy(initial_hash, buf, length);
|
|
NanAsyncQueueWorker(
|
|
new PowWorker(callback, pool_size, target, initial_hash));
|
|
}
|
|
|
|
NanReturnUndefined();
|
|
}
|
|
|
|
// Expose synchronous and asynchronous access to our
|
|
// Estimate() function
|
|
void InitAll(Handle<Object> exports) {
|
|
exports->Set(
|
|
NanNew<String>("powAsync"),
|
|
NanNew<FunctionTemplate>(PowAsync)->GetFunction());
|
|
}
|
|
|
|
NODE_MODULE(worker, InitAll)
|