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ircd:Ⓜ️:vm: Add pointers to access the evaluation data at issue.

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This commit is contained in:
Jason Volk 2018-05-06 18:10:01 -07:00
parent 989441677f
commit a04a3e840e
2 changed files with 40 additions and 2 deletions
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3
include/ircd/m/vm.h
View file

@ -60,6 +60,9 @@ struct ircd::m::vm::eval
uint64_t id {++id_ctr};
uint64_t sequence {0};
db::txn *txn {nullptr};
const json::iov *issue {nullptr};
const event *event_ {nullptr};
string_view room_id;
event::id::buf event_id;
operator const event::id::buf &() const;

39
ircd/m/vm.cc
View file

@ -178,8 +178,20 @@ ircd::m::vm::eval::operator()(const room &room,
// Note that the regular opts is unconditionally overridden because the
// user should have provided copts instead.
this->opts = copts;
const auto &opts(this->copts);
const auto &opts(*this->copts);
// Set a member pointer to the json::iov currently being composed. This
// allows other parallel evals to have deep access to exactly what this
// eval is attempting to do.
this->issue = &event;
this->room_id = room.room_id;
const unwind ueiov{[this]
{
this->room_id = {};
this->issue = nullptr;
}};
assert(room.room_id);
const json::iov::push room_id
{
event, { "room_id", room.room_id }
@ -389,7 +401,21 @@ ircd::m::vm::eval::operator()(json::iov &event,
// user should have provided copts instead.
assert(copts);
this->opts = copts;
const auto &opts(*this->copts);
const auto &opts(*copts);
// Set a member pointer to the json::iov currently being composed. This
// allows other parallel evals to have deep access to exactly what this
// eval is up to. This function may have been called from another function
// which already set the pointer, so we are careful to not null it for them
// on the way out.
const bool issue{this->issue};
assert(!issue || this->issue == &event);
this->issue = &event;
const unwind null_issue{[this, &issue]
{
if(!issue)
this->issue = nullptr;
}};
const json::iov::add_if _origin
{
@ -483,6 +509,15 @@ enum ircd::m::vm::fault
ircd::m::vm::eval::operator()(const event &event)
try
{
// Set a member pointer to the event currently being evaluated. This
// allows other parallel evals to have deep access to exactly what this
// eval is working on. The pointer must be nulled on the way out.
this->event_= &event;
const unwind null_event{[this]
{
this->event_ = nullptr;
}};
if(copts)
{
if(unlikely(!my_host(at<"origin"_>(event))))