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Merge pull request #8808 from RandomShaper/mq-flush-reentrant-2.1 

Make MessageQueue::flush() reentrant (2.1)
This commit is contained in:
Rémi Verschelde 2017-05-18 18:49:41 +02:00 committed by GitHub
parent 21bf3778d5 fa4b09f63d
commit 23fb7d29c2
1 changed files with 9 additions and 6 deletions
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15
core/message_queue.cpp
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@ -316,12 +316,19 @@ void MessageQueue::flush() {
while (read_pos < buffer_end) {
_THREAD_SAFE_UNLOCK_
//lock on each interation, so a call can re-add itself to the message queue
Message *message = (Message *)&buffer[read_pos];
uint32_t advance = sizeof(Message);
if ((message->type & FLAG_MASK) != TYPE_NOTIFICATION)
advance += sizeof(Variant) * message->args;
//pre-advance so this function is reentrant
read_pos += advance;
_THREAD_SAFE_UNLOCK_
Object *target = ObjectDB::get_instance(message->instance_ID);
if (target != NULL) {
@ -357,13 +364,9 @@ void MessageQueue::flush() {
}
}
uint32_t advance = sizeof(Message);
if ((message->type & FLAG_MASK) != TYPE_NOTIFICATION)
advance += sizeof(Variant) * message->args;
message->~Message();
_THREAD_SAFE_LOCK_
read_pos += advance;
}
buffer_end = 0; // reset buffer