system/serenity
system/serenity
1
0
Fork 0
mirror of https://github.com/SerenityOS/serenity synced 2024-09-06 08:56:40 +00:00
Code Issues Packages Projects Releases Wiki Activity

LibCore: IDAllocator should never vend ID 0

Browse source 
This was tripping up CObject which interprets timer ID 0 as "no timer".
Once we got ID 0 assigned, it was impossible to turn it off and it
would fire on every event loop iteration, causing CPU churn.
This commit is contained in:
Andreas Kling 2020-01-05 15:11:49 +01:00
parent c410644c90
commit 1da31ce8ae
1 changed files with 3 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

3
AK/IDAllocator.h
View file

@ -16,6 +16,9 @@ public:
int r = rand();
for (int i = 0; i < 100000; ++i) {
int allocated_id = r + i;
// Make sure we never vend ID 0, as some code may interpret that as "no ID"
if (allocated_id == 0)
++allocated_id;
if (!m_allocated_ids.contains(allocated_id)) {
m_allocated_ids.set(allocated_id);
return allocated_id;