152 lines
4.4 KiB
C++
152 lines
4.4 KiB
C++
#pragma once
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#include "capnp/dynamic.h"
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#include <kj/async-io.h>
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#include <capnp/serialize-async.h>
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#include <stdexcept>
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#include "Python.h"
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class GILAcquire {
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public:
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GILAcquire() : gstate(PyGILState_Ensure()) {}
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~GILAcquire() {
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PyGILState_Release(gstate);
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}
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PyGILState_STATE gstate;
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};
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class GILRelease {
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public:
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GILRelease() {
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Py_UNBLOCK_THREADS
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}
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~GILRelease() {
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Py_BLOCK_THREADS
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}
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PyThreadState *_save; // The macros above read/write from this variable
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};
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class PyRefCounter {
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public:
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PyObject * obj;
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PyRefCounter(PyObject * o) : obj(o) {
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GILAcquire gil;
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Py_INCREF(obj);
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}
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PyRefCounter(const PyRefCounter & ref) : obj(ref.obj) {
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GILAcquire gil;
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Py_INCREF(obj);
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}
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~PyRefCounter() {
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GILAcquire gil;
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Py_DECREF(obj);
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}
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};
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inline kj::Own<PyRefCounter> stealPyRef(PyObject* o) {
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auto ret = kj::heap<PyRefCounter>(o);
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Py_DECREF(o);
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return ret;
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}
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::kj::Promise<kj::Own<PyRefCounter>> convert_to_pypromise(kj::Own<capnp::RemotePromise<capnp::DynamicStruct>> promise);
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inline ::kj::Promise<kj::Own<PyRefCounter>> convert_to_pypromise(kj::Own<kj::Promise<void>> promise) {
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return promise->then([]() {
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GILAcquire gil;
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return kj::heap<PyRefCounter>(Py_None);
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});
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}
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template<class T>
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::kj::Promise<void> convert_to_voidpromise(kj::Own<kj::Promise<T>> promise) {
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return promise->then([](T) { } );
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}
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void reraise_kj_exception();
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void check_py_error();
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inline kj::Promise<kj::Own<PyRefCounter>> wrapSizePromise(kj::Promise<size_t> promise) {
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return promise.then([](size_t response) { return stealPyRef(PyLong_FromSize_t(response)); } );
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}
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::kj::Promise<kj::Own<PyRefCounter>> then(kj::Own<kj::Promise<kj::Own<PyRefCounter>>> promise,
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kj::Own<PyRefCounter> func, kj::Own<PyRefCounter> error_func);
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::kj::Promise<kj::Own<PyRefCounter>> then(kj::Own<::capnp::RemotePromise< ::capnp::DynamicStruct>> promise,
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kj::Own<PyRefCounter> func, kj::Own<PyRefCounter> error_func);
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::kj::Promise<kj::Own<PyRefCounter>> then(kj::Own<kj::Promise<void>> promise,
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kj::Own<PyRefCounter>func, kj::Own<PyRefCounter> error_func);
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class PythonInterfaceDynamicImpl final: public capnp::DynamicCapability::Server {
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public:
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PyObject * py_server;
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PythonInterfaceDynamicImpl(capnp::InterfaceSchema & schema, PyObject * _py_server)
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: capnp::DynamicCapability::Server(schema), py_server(_py_server) {
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GILAcquire gil;
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Py_INCREF(_py_server);
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}
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~PythonInterfaceDynamicImpl() {
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GILAcquire gil;
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Py_DECREF(py_server);
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}
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kj::Promise<void> call(capnp::InterfaceSchema::Method method,
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capnp::CallContext< capnp::DynamicStruct, capnp::DynamicStruct> context);
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};
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inline capnp::DynamicCapability::Client new_client(capnp::InterfaceSchema & schema, PyObject * server) {
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return capnp::DynamicCapability::Client(kj::heap<PythonInterfaceDynamicImpl>(schema, server));
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}
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inline capnp::DynamicValue::Reader new_server(capnp::InterfaceSchema & schema, PyObject * server) {
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return capnp::DynamicValue::Reader(kj::heap<PythonInterfaceDynamicImpl>(schema, server));
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}
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inline capnp::Capability::Client server_to_client(capnp::InterfaceSchema & schema, PyObject * server) {
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return kj::heap<PythonInterfaceDynamicImpl>(schema, server);
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}
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class PyAsyncIoStream: public kj::AsyncIoStream {
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public:
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kj::Own<PyRefCounter> protocol;
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PyAsyncIoStream(kj::Own<PyRefCounter> protocol) : protocol(kj::mv(protocol)) {}
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~PyAsyncIoStream();
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kj::Promise<size_t> tryRead(void* buffer, size_t minBytes, size_t maxBytes);
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kj::Promise<void> write(const void* buffer, size_t size);
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kj::Promise<void> write(kj::ArrayPtr<const kj::ArrayPtr<const kj::byte>> pieces);
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kj::Promise<void> whenWriteDisconnected();
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void shutdownWrite();
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};
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template <typename T>
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inline void rejectDisconnected(kj::PromiseFulfiller<T>& fulfiller, kj::StringPtr message) {
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fulfiller.reject(KJ_EXCEPTION(DISCONNECTED, message));
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}
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inline void rejectVoidDisconnected(kj::PromiseFulfiller<void>& fulfiller, kj::StringPtr message) {
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fulfiller.reject(KJ_EXCEPTION(DISCONNECTED, message));
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}
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inline kj::Exception makeException(kj::StringPtr message) {
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return KJ_EXCEPTION(FAILED, message);
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}
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kj::Promise<void> taskToPromise(kj::Own<PyRefCounter> coroutine, PyObject* callback);
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::kj::Promise<kj::Own<PyRefCounter>> tryReadMessage(kj::AsyncIoStream& stream, capnp::ReaderOptions opts);
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void init_capnp_api();
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