mirror of
https://github.com/matrix-construct/construct
synced 2024-10-01 21:28:53 +02:00
272 lines
7.1 KiB
C++
272 lines
7.1 KiB
C++
/*
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* charybdis: standing on the shoulders of giant build times
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*
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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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#include <js/Initialization.h> // JS_Init() / JS_ShutDown()
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#include <ircd/js/js.h>
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namespace ircd {
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namespace js {
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// Location of the main JSRuntime instance. An extern reference to this exists in js/runtime.h.
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// It is null until js::init manually constructs (and later destructs) it.
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runtime main;
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// Location of the default/main JSContext instance. An extern reference to this exists in js/context.h.
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// Lifetime similar to main runtime
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context mc;
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// Logging facility for this submodule with SNOMASK.
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struct log::log log
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{
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"js", 'J'
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};
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} // namespace js
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} // namespace ircd
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///////////////////////////////////////////////////////////////////////////////
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//
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// ircd/js.h - Without 3rd party (JSAPI) symbols
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//
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ircd::js::init::init()
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{
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log.info("Initializing the JS engine [%s: %s]",
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"SpiderMonkey",
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version(ver::IMPLEMENTATION));
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if(!JS_Init())
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throw error("JS_Init(): failure");
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struct runtime::opts runtime_opts;
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struct context::opts context_opts;
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log.info("Initializing the main JS Runtime (main_maxbytes: %zu)",
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runtime_opts.maxbytes);
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main = runtime(runtime_opts);
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mc = context(main, context_opts);
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log.info("Initialized main JS Runtime and context (version: '%s')",
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version(mc));
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}
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ircd::js::init::~init()
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noexcept
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{
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log.info("Terminating the main JS Runtime");
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// Assign empty objects to free and reset
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mc = context{};
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main = runtime{};
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log.info("Terminating the JS engine");
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JS_ShutDown();
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}
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const char *
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ircd::js::version(const ver &type)
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{
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switch(type)
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{
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case ver::IMPLEMENTATION:
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return JS_GetImplementationVersion();
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default:
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throw error("version(): Unknown version type requested");
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// ircd/js/js.h - With 3rd party (JSAPI) symbols
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//
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///////////////////////////////////////////////////////////////////////////////
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//
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// ircd/js/context.h
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//
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ircd::js::context::context(JSRuntime *const &runtime,
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const struct opts &opts)
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:custom_ptr<JSContext>
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{
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JS_NewContext(runtime, opts.stack_chunk_size),
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[opts](JSContext *const ctx) //TODO: old gcc/clang can't copy from opts.dtor_gc
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noexcept
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{
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if(!ctx)
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return;
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// Free the user's privdata managed object
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delete static_cast<const privdata *>(JS_GetSecondContextPrivate(ctx));
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if(opts.dtor_gc)
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JS_DestroyContext(ctx);
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else
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JS_DestroyContextNoGC(ctx);
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}
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}
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,opts{opts}
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{
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JS_SetContextPrivate(get(), this);
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}
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ircd::js::context::context(context &&other)
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noexcept
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:custom_ptr<JSContext>{std::move(other)}
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,opts{std::move(other.opts)}
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{
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// Branch not taken for null/defaulted instance of JSContext smart ptr
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if(!!*this)
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JS_SetContextPrivate(get(), this);
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}
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ircd::js::context &
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ircd::js::context::operator=(context &&other)
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noexcept
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{
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static_cast<custom_ptr<JSContext> &>(*this) = std::move(other);
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opts = std::move(other.opts);
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// Branch not taken for null/defaulted instance of JSContext smart ptr
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if(!!*this)
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JS_SetContextPrivate(get(), this);
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return *this;
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// ircd/js/runtime.h
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//
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ircd::js::runtime::runtime(const struct opts &opts)
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:custom_ptr<JSRuntime>
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{
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JS_NewRuntime(opts.maxbytes),
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JS_DestroyRuntime
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}
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,opts(opts)
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{
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JS_SetRuntimePrivate(get(), this);
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JS_SetErrorReporter(get(), handle_error);
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JS::SetOutOfMemoryCallback(get(), handle_out_of_memory, nullptr);
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JS::SetLargeAllocationFailureCallback(get(), handle_large_allocation_failure, nullptr);
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JS_SetGCCallback(get(), handle_gc, nullptr);
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JS_AddFinalizeCallback(get(), handle_finalize, nullptr);
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JS_SetDestroyCompartmentCallback(get(), handle_destroy_compartment);
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JS_SetContextCallback(get(), handle_context, nullptr);
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JS_SetNativeStackQuota(get(), opts.code_stack_max, opts.trusted_stack_max, opts.untrusted_stack_max);
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}
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ircd::js::runtime::runtime(runtime &&other)
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noexcept
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:custom_ptr<JSRuntime>{std::move(other)}
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,opts(std::move(other.opts))
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{
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// Branch not taken for null/defaulted instance of JSRuntime smart ptr
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if(!!*this)
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JS_SetRuntimePrivate(get(), this);
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}
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ircd::js::runtime &
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ircd::js::runtime::operator=(runtime &&other)
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noexcept
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{
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static_cast<custom_ptr<JSRuntime> &>(*this) = std::move(other);
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opts = std::move(other.opts);
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// Branch not taken for null/defaulted instance of JSRuntime smart ptr
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if(!!*this)
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JS_SetRuntimePrivate(get(), this);
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return *this;
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}
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bool
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ircd::js::runtime::handle_interrupt(JSContext *const ctx)
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{
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auto &runtime(our(ctx).runtime());
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JS_SetInterruptCallback(runtime, nullptr);
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return false;
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}
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bool
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ircd::js::runtime::handle_context(JSContext *const c,
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const uint op,
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void *const priv)
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{
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return true;
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}
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void
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ircd::js::runtime::handle_iterate_compartments(JSRuntime *const rt,
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void *const priv,
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JSCompartment *const compartment)
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{
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}
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void
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ircd::js::runtime::handle_destroy_compartment(JSFreeOp *const fop,
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JSCompartment *const compartment)
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{
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}
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void
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ircd::js::runtime::handle_finalize(JSFreeOp *const fop,
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const JSFinalizeStatus status,
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const bool is_compartment,
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void *const priv)
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{
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}
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void
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ircd::js::runtime::handle_gc(JSRuntime *const rt,
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const JSGCStatus status,
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void *const priv)
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{
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}
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void
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ircd::js::runtime::handle_large_allocation_failure(void *const priv)
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{
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log.error("Large allocation failure");
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}
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void
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ircd::js::runtime::handle_out_of_memory(JSContext *const ctx,
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void *const priv)
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{
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log.error("JSContext(%p): out of memory", (const void *)ctx);
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}
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void
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ircd::js::runtime::handle_error(JSContext *const ctx,
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const char *const msg,
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JSErrorReport *const report)
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{
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log.error("JSContext(%p): %s", (const void *)ctx, msg);
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}
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