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#include <node.h>
#include <node_buffer.h>
#include <v8.h>
#include <assert.h>
static int alive;
static char buf[1024];
static void FreeCallback(char* data, void* hint) {
alive--;
}
void Alloc(const v8::FunctionCallbackInfo<v8::Value>& args) {
v8::Isolate* isolate = args.GetIsolate();
alive++;
uintptr_t alignment = args[1].As<v8::Integer>()->Value();
uintptr_t offset = args[2].As<v8::Integer>()->Value();
uintptr_t static_offset = reinterpret_cast<uintptr_t>(buf) % alignment;
char* aligned = buf + (alignment - static_offset) + offset;
args.GetReturnValue().Set(node::Buffer::New(
isolate,
aligned,
args[0].As<v8::Integer>()->Value(),
FreeCallback,
nullptr).ToLocalChecked());
}
void Check(const v8::FunctionCallbackInfo<v8::Value>& args) {
v8::Isolate* isolate = args.GetIsolate();
isolate->RequestGarbageCollectionForTesting(
v8::Isolate::kFullGarbageCollection);
assert(alive > 0);
}
void init(v8::Local<v8::Object> exports) {
NODE_SET_METHOD(exports, "alloc", Alloc);
NODE_SET_METHOD(exports, "check", Check);
}
NODE_MODULE(NODE_GYP_MODULE_NAME, init)
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