RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-31 22:08:10 +00:00
Code Issues Activity Actions

Kernel: Some futex improvements

Browse source 
This adds support for FUTEX_WAKE_OP, FUTEX_WAIT_BITSET, FUTEX_WAKE_BITSET,
FUTEX_REQUEUE, and FUTEX_CMP_REQUEUE, as well well as global and private
futex and absolute/relative timeouts against the appropriate clock. This
also changes the implementation so that kernel resources are only used when
a thread is blocked on a futex.

Global futexes are implemented as offsets in VMObjects, so that different
processes can share a futex against the same VMObject despite potentially
being mapped at different virtual addresses.
This commit is contained in:
Tom 2020-12-21 23:21:58 -07:00 • committed by Andreas Kling
parent 7581b64705
commit 1d621ab172
23 changed files with 928 additions and 63 deletions
Download patch file Download diff file Expand all files Collapse all files

4
Kernel/WaitQueue.h
View file

@ -35,8 +35,8 @@ namespace Kernel {
class WaitQueue : public Thread::BlockCondition {
public:
void wake_one();
void wake_n(u32 wake_count);
void wake_all();
u32 wake_n(u32 wake_count);
u32 wake_all();
template<class... Args>
Thread::BlockResult wait_on(const Thread::BlockTimeout& timeout, Args&&... args)