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/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; -*- */
// SPDX-License-Identifier: MIT OR LGPL-2.0-or-later
// SPDX-FileCopyrightText: 2008 litl, LLC
#ifndef GI_FUNCTION_H_
#define GI_FUNCTION_H_
#include <config.h>
#include <stdint.h>
#include <unordered_set>
#include <vector>
#include <ffi.h>
#include <girepository.h>
#include <glib-object.h>
#include <glib.h>
#include <js/GCVector.h>
#include <js/RootingAPI.h>
#include <js/TypeDecls.h>
#include <js/Value.h> // IWYU pragma: keep
#include "gi/closure.h"
#include "gjs/jsapi-util.h"
#include "gjs/macros.h"
namespace JS {
class CallArgs;
}
typedef enum {
PARAM_NORMAL,
PARAM_SKIPPED,
PARAM_ARRAY,
PARAM_CALLBACK,
PARAM_UNKNOWN,
} GjsParamType;
using GjsAutoGClosure =
GjsAutoPointer<GClosure, GClosure, g_closure_unref, g_closure_ref>;
struct GjsCallbackTrampoline : public Gjs::Closure {
GJS_JSAPI_RETURN_CONVENTION static GjsCallbackTrampoline* create(
JSContext* cx, JS::HandleFunction function,
GICallableInfo* callable_info, GIScopeType scope, bool has_scope_object,
bool is_vfunc);
~GjsCallbackTrampoline();
void* closure() const {
#if GI_CHECK_VERSION(1, 71, 0)
return g_callable_info_get_closure_native_address(m_info, m_closure);
#else
return m_closure;
#endif
}
void mark_forever();
static void prepare_shutdown();
private:
ffi_closure* create_closure();
GJS_JSAPI_RETURN_CONVENTION bool initialize();
GjsCallbackTrampoline(JSContext* cx, JS::HandleFunction function,
GICallableInfo* callable_info, GIScopeType scope,
bool has_scope_object, bool is_vfunc);
void callback_closure(GIArgument** args, void* result);
GJS_JSAPI_RETURN_CONVENTION
bool callback_closure_inner(JSContext* cx, JS::HandleObject this_object,
JS::MutableHandleValue rval, GIArgument** args,
GITypeInfo* ret_type, int n_args,
int c_args_offset, void* result);
void warn_about_illegal_js_callback(const char* when, const char* reason);
static std::vector<GjsAutoGClosure> s_forever_closure_list;
GjsAutoCallableInfo m_info;
ffi_closure* m_closure = nullptr;
std::vector<GjsParamType> m_param_types;
ffi_cif m_cif;
GIScopeType m_scope : 3;
bool m_is_vfunc : 1;
};
// Stack allocation only!
class GjsFunctionCallState {
GIArgument* m_in_cvalues;
GIArgument* m_out_cvalues;
GIArgument* m_inout_original_cvalues;
public:
std::unordered_set<GIArgument*> ignore_release;
JS::RootedObject instance_object;
JS::RootedValueVector return_values;
GjsAutoError local_error;
GICallableInfo* info;
uint8_t gi_argc = 0;
unsigned processed_c_args = 0;
bool failed : 1;
bool can_throw_gerror : 1;
bool is_method : 1;
GjsFunctionCallState(JSContext* cx, GICallableInfo* callable)
: instance_object(cx),
return_values(cx),
info(callable),
gi_argc(g_callable_info_get_n_args(callable)),
failed(false),
can_throw_gerror(g_callable_info_can_throw_gerror(callable)),
is_method(g_callable_info_is_method(callable)) {
int size = gi_argc + first_arg_offset();
m_in_cvalues = new GIArgument[size];
m_out_cvalues = new GIArgument[size];
m_inout_original_cvalues = new GIArgument[size];
}
~GjsFunctionCallState() {
delete[] m_in_cvalues;
delete[] m_out_cvalues;
delete[] m_inout_original_cvalues;
}
GjsFunctionCallState(const GjsFunctionCallState&) = delete;
GjsFunctionCallState& operator=(const GjsFunctionCallState&) = delete;
constexpr int first_arg_offset() const { return is_method ? 2 : 1; }
// The list always contains the return value, and the arguments
constexpr GIArgument* instance() {
return is_method ? &m_in_cvalues[1] : nullptr;
}
constexpr GIArgument* return_value() { return &m_out_cvalues[0]; }
constexpr GIArgument& in_cvalue(int index) const {
return m_in_cvalues[index + first_arg_offset()];
}
constexpr GIArgument& out_cvalue(int index) const {
return m_out_cvalues[index + first_arg_offset()];
}
constexpr GIArgument& inout_original_cvalue(int index) const {
return m_inout_original_cvalues[index + first_arg_offset()];
}
constexpr bool did_throw_gerror() const {
return can_throw_gerror && local_error;
}
constexpr bool call_completed() { return !failed && !did_throw_gerror(); }
constexpr uint8_t last_processed_index() {
return first_arg_offset() + processed_c_args;
}
[[nodiscard]] GjsAutoChar display_name() {
GIBaseInfo* container = g_base_info_get_container(info); // !owned
if (container) {
return g_strdup_printf(
"%s.%s.%s", g_base_info_get_namespace(container),
g_base_info_get_name(container), g_base_info_get_name(info));
}
return g_strdup_printf("%s.%s", g_base_info_get_namespace(info),
g_base_info_get_name(info));
}
};
GJS_JSAPI_RETURN_CONVENTION
JSObject *gjs_define_function(JSContext *context,
JS::HandleObject in_object,
GType gtype,
GICallableInfo *info);
GJS_JSAPI_RETURN_CONVENTION
bool gjs_invoke_constructor_from_c(JSContext* cx, GIFunctionInfo* info,
JS::HandleObject this_obj,
const JS::CallArgs& args,
GIArgument* rvalue);
#endif // GI_FUNCTION_H_
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