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construct/include/ircd/js/compartment.h
2018-02-05 21:24:34 -08:00

107 lines
3.3 KiB
C++

// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
#pragma once
#define HAVE_IRCD_JS_COMPARTMENT_H
namespace ircd {
namespace js {
struct compartment
{
using closure_our = std::function<void (compartment &)>;
using closure = std::function<void (JSCompartment *)>;
private:
static void handle_iterate(JSContext *, void *, JSCompartment *) noexcept;
context *c;
JSCompartment *prev;
JSCompartment *ours;
compartment *cprev;
public:
explicit operator const context &() const { return *c; }
operator const JSCompartment *() const { return ours; }
operator const JSCompartment &() const { return *ours; }
explicit operator context &() { return *c; }
operator JSCompartment *() { return ours; }
operator JSCompartment &() { return *ours; }
compartment(JSObject *const &, context &, const JSVersion & = JSVERSION_LATEST);
compartment(JSObject *const &, const JSVersion & = JSVERSION_LATEST);
compartment(context &, const JSVersion & = JSVERSION_LATEST);
compartment(const JSVersion & = JSVERSION_LATEST);
compartment(compartment &&) noexcept;
compartment(const compartment &) = delete;
~compartment() noexcept;
friend void for_each_compartment_our(const closure_our &);
friend void for_each_compartment(const closure &);
static compartment &get(context &c);
static compartment &get();
};
// Get our structure from JSCompartment. Returns null when not ours.
const compartment *our(const JSCompartment *const &);
compartment *our(JSCompartment *const &);
// Compartment iterations
void for_each_compartment_our(const compartment::closure_our &); // iterate our compartments only
void for_each_compartment(const compartment::closure &); // iterate all compartments
// Get the compartmentalized `this` object.
JSObject *current_global(compartment &);
inline compartment &
compartment::get()
{
assert(cx);
return get(*cx);
}
inline compartment &
compartment::get(context &c)
{
const auto cp(current_compartment(c));
if(unlikely(!cp))
throw error("No current compartment on context(%p)", (const void *)&c);
const auto ret(our(cp));
if(unlikely(!ret))
throw error("Current compartment on context(%p) not ours", (const void *)&c);
return *ret;
}
inline JSObject *
current_global(compartment &c)
{
return JS_GetGlobalForCompartmentOrNull(static_cast<context &>(c), c);
}
inline compartment *
our(JSCompartment *const &cp)
{
return static_cast<compartment *>(JS_GetCompartmentPrivate(cp));
}
inline
const compartment *
our(const JSCompartment *const &cp)
{
return static_cast<const compartment *>(JS_GetCompartmentPrivate(const_cast<JSCompartment *>(cp)));
}
} // namespace js
} // namespace ircd