mirror of
https://github.com/matrix-construct/construct
synced 2024-12-29 17:04:03 +01:00
112 lines
4.3 KiB
C++
112 lines
4.3 KiB
C++
/*
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* Copyright (C) 2016 Charybdis Development Team
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* Copyright (C) 2016 Jason Volk <jason@zemos.net>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice is present in all copies.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#define HAVE_IRCD_JS_CONTEXT_H
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namespace ircd {
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namespace js {
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struct context
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:private custom_ptr<JSContext>
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{
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struct opts
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{
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size_t stack_chunk_size = 8_KiB;
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bool dtor_gc = true;
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}
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opts; // We keep a copy of the given opts here.
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operator JSContext *() const { return get(); }
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operator JSContext &() const { return custom_ptr<JSContext>::operator*(); }
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bool operator!() const { return !custom_ptr<JSContext>::operator bool(); }
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auto &runtime() const { return our(JS_GetRuntime(get())); }
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auto &runtime() { return our(JS_GetRuntime(get())); }
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auto ptr() const { return get(); }
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auto ptr() { return get(); }
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context(JSRuntime *const &, const struct opts &);
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context() = default;
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context(context &&) noexcept;
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context(const context &) = delete;
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context &operator=(context &&) noexcept;
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context &operator=(const context &) = delete;
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};
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// A default JSContext instance is provided residing near the main runtime as a convenience
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// for misc/utility/system purposes if necessary.
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extern context mc;
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// Get to our `struct context` from any upstream JSContext
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const context &our(const JSContext *const &);
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context &our(JSContext *const &);
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// Get/Set your privdata managed by this object, casting to your expected type.
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template<class T = privdata> const T *priv(const context &);
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template<class T = privdata> T *priv(context &);
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void priv(context &, privdata *const &);
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auto version(const context &c) { return version(JS_GetVersion(c)); }
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auto running(const context &c) { return JS_IsRunning(c); }
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auto uncaught_exception(const context &c) { return JS_IsExceptionPending(c); }
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auto rethrow_exception(context &c) { return JS_ReportPendingException(c); }
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auto interrupted(const context &c) { return JS_CheckForInterrupt(c); }
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void out_of_memory(context &c) { JS_ReportOutOfMemory(c); }
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void allocation_overflow(context &c) { JS_ReportAllocationOverflow(c); }
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void run_gc(context &c) { JS_MaybeGC(c); }
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inline void
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priv(context &c,
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privdata *const &ptr)
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{
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delete priv(c); // Free any existing object to overwrite/null
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JS_SetSecondContextPrivate(c, ptr);
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}
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template<class T>
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T *
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priv(context &c)
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{
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return dynamic_cast<T *>(static_cast<privdata *>(JS_GetSecondContextPrivate(c)));
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}
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template<class T>
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const T *
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priv(const context &c)
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{
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return dynamic_cast<const T *>(static_cast<const privdata *>(JS_GetSecondContextPrivate(c)));
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}
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inline context &
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our(JSContext *const &c)
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{
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return *static_cast<context *>(JS_GetContextPrivate(c));
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}
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inline const context &
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our(const JSContext *const &c)
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{
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return *static_cast<const context *>(JS_GetContextPrivate(const_cast<JSContext *>(c)));
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}
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} // namespace js
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} // namespace ircd
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