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serenity/Kernel
Tom 75f61fe3d9 AK: Make RefPtr, NonnullRefPtr, WeakPtr thread safe
This makes most operations thread safe, especially so that they
can safely be used in the Kernel. This includes obtaining a strong
reference from a weak reference, which now requires an explicit
call to WeakPtr::strong_ref(). Another major change is that
Weakable::make_weak_ref() may require the explicit target type.
Previously we used reinterpret_cast in WeakPtr, assuming that it
can be properly converted. But WeakPtr does not necessarily have
the knowledge to be able to do this. Instead, we now ask the class
itself to deliver a WeakPtr to the type that we want.

Also, WeakLink is no longer specific to a target type. The reason
for this is that we want to be able to safely convert e.g. WeakPtr<T>
to WeakPtr<U>, and before this we just reinterpret_cast the internal
WeakLink<T> to WeakLink<U>, which is a bold assumption that it would
actually produce the correct code. Instead, WeakLink now operates
on just a raw pointer and we only make those constructors/operators
available if we can verify that it can be safely cast.

In order to guarantee thread safety, we now use the least significant
bit in the pointer for locking purposes. This also means that only
properly aligned pointers can be used.
2020-11-10 19:11:52 +01:00
..
ACPI Meta+Kernel: Make clang-format-10 clean 2020-09-25 21:18:17 +02:00
API Kernel+LibC: Add adjtime(2) 2020-11-10 19:03:08 +01:00
Arch Kernel: Add mechanism to queue deferred function calls 2020-11-04 21:21:37 +01:00
Devices Revert "Kernel: Implement an asynchronous device request stack" 2020-11-04 21:25:26 +01:00
FileSystem AK: Make RefPtr, NonnullRefPtr, WeakPtr thread safe 2020-11-10 19:11:52 +01:00
Heap Kernel: Defer kmalloc heap contraction 2020-11-04 21:21:37 +01:00
Interrupts Kernel: Don't remap IOAPIC registers every time we try to read/write 2020-11-01 10:30:20 +01:00
Modules Kernel: Module symbol declarations for type-checking 2020-08-12 20:40:59 +02:00
Net AK: Make RefPtr, NonnullRefPtr, WeakPtr thread safe 2020-11-10 19:11:52 +01:00
PCI Kernel: Reduce code duplication in the PCI IO access read helpers 2020-11-01 10:19:17 +01:00
Syscalls AK: Make RefPtr, NonnullRefPtr, WeakPtr thread safe 2020-11-10 19:11:52 +01:00
Tasks Kernel: Make Thread refcounted 2020-09-27 19:46:04 +02:00
Time Kernel+LibC: Add adjtime(2) 2020-11-10 19:03:08 +01:00
TTY AK: Make RefPtr, NonnullRefPtr, WeakPtr thread safe 2020-11-10 19:11:52 +01:00
VM AK: Make RefPtr, NonnullRefPtr, WeakPtr thread safe 2020-11-10 19:11:52 +01:00
.gitignore Meta: Removed all gitignore in the source tree only keeping the root one 2019-06-30 10:41:26 +02:00
Assertions.h Kernel: List all CPUs in /proc/cpuinfo 2020-07-01 12:07:01 +02:00
CMakeLists.txt Revert "Kernel: Implement an asynchronous device request stack" 2020-11-04 21:25:26 +01:00
CMOS.cpp Kernel: Absorb LibBareMetal back into the kernel 2020-05-16 12:00:04 +02:00
CMOS.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
CommandLine.cpp Meta+Kernel: Make clang-format-10 clean 2020-09-25 21:18:17 +02:00
CommandLine.h Kernel: Copy command line to a safe place 2020-08-25 09:48:48 +02:00
Console.cpp Meta+Kernel: Make clang-format-10 clean 2020-09-25 21:18:17 +02:00
Console.h Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
DoubleBuffer.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
DoubleBuffer.h Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
Forward.h Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
init.cpp Kernel: Set up and calibrate APIC timer, and enable timer on all CPUs 2020-10-25 21:18:35 +01:00
IO.h Kernel: Absorb LibBareMetal back into the kernel 2020-05-16 12:00:04 +02:00
KBuffer.h Kernel: Make Inode::read_entire() return a KBuffer (not ByteBuffer) 2020-08-11 20:29:14 +02:00
KBufferBuilder.cpp AK+Kernel: Escape JSON keys & values 2020-11-02 12:56:36 +01:00
KBufferBuilder.h AK+Kernel: Escape JSON keys & values 2020-11-02 12:56:36 +01:00
kprintf.cpp Kernel: Stop supporting sprintf 2020-08-22 20:55:10 +02:00
KResult.h Meta+Kernel: Make clang-format-10 clean 2020-09-25 21:18:17 +02:00
kstdio.h Kernel: Stop supporting sprintf 2020-08-22 20:55:10 +02:00
KSyms.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
KSyms.h Kernel: Update cryptically-named functions related to symbolication 2020-04-08 17:19:46 +02:00
linker.ld Kernel: Invoke heap constructors separately early on 2020-08-10 20:05:18 +02:00
Lock.cpp Meta+Kernel: Make clang-format-10 clean 2020-09-25 21:18:17 +02:00
Lock.h AK: Add ALWAYS_INLINE, NEVER_INLINE and FLATTEN macros 2020-04-30 11:43:25 +02:00
mkmap.sh Build: Switch to CMake :^) 2020-05-14 20:15:18 +02:00
Module.h Kernel: Move all code into the Kernel namespace 2020-02-16 01:27:42 +01:00
Multiboot.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
PerformanceEventBuffer.cpp Kernel: Don't use copy_from_user() for kernelspace read in perf events 2020-08-17 09:57:18 +02:00
PerformanceEventBuffer.h Kernel: PID/TID typing 2020-08-10 11:51:45 +02:00
PhysicalAddress.h Meta+Kernel: Make clang-format-10 clean 2020-09-25 21:18:17 +02:00
Process.cpp AK: Make RefPtr, NonnullRefPtr, WeakPtr thread safe 2020-11-10 19:11:52 +01:00
Process.h Kernel+LibC: Add adjtime(2) 2020-11-10 19:03:08 +01:00
ProcessGroup.cpp Kernel: Distinguish between new and old process groups with equal pgids 2020-08-19 21:21:34 +02:00
ProcessGroup.h Kernel: Distinguish between new and old process groups with equal pgids 2020-08-19 21:21:34 +02:00
Profiling.cpp AK: Rename KB, MB, GB to KiB, MiB, GiB 2020-08-16 16:33:28 +02:00
Profiling.h Kernel: More PID/TID typing 2020-08-10 11:51:45 +02:00
Ptrace.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
Ptrace.h Meta+Kernel: Make clang-format-10 clean 2020-09-25 21:18:17 +02:00
Random.cpp Kernel: Switch singletons to use new Singleton class 2020-08-25 09:48:48 +02:00
Random.h Kernel: Switch singletons to use new Singleton class 2020-08-25 09:48:48 +02:00
RTC.cpp Kernel: Minor tweak to now() computation 2020-08-26 08:52:07 +02:00
RTC.h Meta: Add license header to source files 2020-01-18 09:45:54 +01:00
Scheduler.cpp AK: Make RefPtr, NonnullRefPtr, WeakPtr thread safe 2020-11-10 19:11:52 +01:00
Scheduler.h Kernel: Make Thread refcounted 2020-09-27 19:46:04 +02:00
SharedBuffer.cpp AK: Make RefPtr, NonnullRefPtr, WeakPtr thread safe 2020-11-10 19:11:52 +01:00
SharedBuffer.h Kernel: PID/TID typing 2020-08-10 11:51:45 +02:00
SpinLock.h Kernel: Do not wait before first attempt at locking SpinLock (#3212) 2020-08-19 11:10:53 +02:00
StdLib.cpp Kernel: Make copy_to/from_user safe and remove unnecessary checks 2020-09-13 21:19:15 +02:00
StdLib.h Kernel: Add checks for is_trivially_copyable to copy_to/from_user 2020-10-02 15:38:07 +02:00
Syscall.cpp Meta+Kernel: Make clang-format-10 clean 2020-09-25 21:18:17 +02:00
Thread.cpp AK: Make RefPtr, NonnullRefPtr, WeakPtr thread safe 2020-11-10 19:11:52 +01:00
Thread.h Kernel: Fix a few deadlocks with Thread::m_lock and g_scheduler_lock 2020-10-26 08:57:25 +01:00
ThreadTracer.cpp Kernel: PID/TID typing 2020-08-10 11:51:45 +02:00
ThreadTracer.h Kernel: PID/TID typing 2020-08-10 11:51:45 +02:00
TimerQueue.cpp Kernel: Switch singletons to use new Singleton class 2020-08-25 09:48:48 +02:00
TimerQueue.h Kernel: Switch singletons to use new Singleton class 2020-08-25 09:48:48 +02:00
UnixTypes.h Kernel: Implement _SC_OPEN_MAX 2020-09-27 01:02:11 +02:00
UserOrKernelBuffer.cpp AK: Add StringBuilder::appendff using the new format. 2020-09-22 15:06:40 +02:00
UserOrKernelBuffer.h FileSystem: Use OutputMemoryStream instead of BufferStream. 2020-09-15 20:36:45 +02:00
VirtualAddress.h Meta+Kernel: Make clang-format-10 clean 2020-09-25 21:18:17 +02:00
WaitQueue.cpp Meta+Kernel: Make clang-format-10 clean 2020-09-25 21:18:17 +02:00
WaitQueue.h SinglyLinkedList: Remove unused includes 2020-10-08 09:54:41 +02:00