mirrors/ladybird
0
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2025-09-01 07:07:49 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 10

Kernel: Add safe atomic functions

Browse source 
This allows us to perform atomic operations on potentially unsafe
user space pointers.
This commit is contained in:
Tom 2020-12-19 18:48:56 -07:00 • committed by Andreas Kling
commit b17a889320
Notes: sideshowbarker 2024-07-18 23:08:18 +09:00
10 changed files with 573 additions and 166 deletions
Download patch file Download diff file Expand all files Collapse all files

10
Kernel/StdLib.h
View file

@ -37,6 +37,16 @@ struct StringArgument;
String copy_string_from_user(const char*, size_t);
String copy_string_from_user(Userspace<const char*>, size_t);
[[nodiscard]] Optional<u32> user_atomic_fetch_add_relaxed(volatile u32* var, u32 val);
[[nodiscard]] Optional<u32> user_atomic_exchange_relaxed(volatile u32* var, u32 val);
[[nodiscard]] Optional<u32> user_atomic_load_relaxed(volatile u32* var);
[[nodiscard]] bool user_atomic_store_relaxed(volatile u32* var, u32 val);
[[nodiscard]] Optional<bool> user_atomic_compare_exchange_relaxed(volatile u32* var, u32& expected, u32 val);
[[nodiscard]] Optional<u32> user_atomic_fetch_and_relaxed(volatile u32* var, u32 val);
[[nodiscard]] Optional<u32> user_atomic_fetch_and_not_relaxed(volatile u32* var, u32 val);
[[nodiscard]] Optional<u32> user_atomic_fetch_or_relaxed(volatile u32* var, u32 val);
[[nodiscard]] Optional<u32> user_atomic_fetch_xor_relaxed(volatile u32* var, u32 val);
extern "C" {
[[nodiscard]] bool copy_to_user(void*, const void*, size_t);