feat! breaking API changes, use header guards and libSystem fixes.

Signed-off-by: Amlal El Mahrouss <amlal@nekernel.org>

21 files changed, 88 insertions, 25 deletions

diff --git a/src/kernel/KernelKit/BinaryMutex.h b/src/kernel/KernelKit/BinaryMutex.h
index 0609ca9c..48dc6e50 100644
--- a/src/kernel/KernelKit/BinaryMutex.h
+++ b/src/kernel/KernelKit/BinaryMutex.h
@@ -4,7 +4,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_BINARYMUTEX_H
+#define KERNELKIT_BINARYMUTEX_H
 
 #include <CompilerKit/CompilerKit.h>
 #include <KernelKit/Timer.h>
@@ -39,3 +40,5 @@ class BinaryMutex final {
   LockedPtr fLockingProcess{nullptr};
 };
 }  // namespace Kernel
+
+#endif
diff --git a/src/kernel/KernelKit/CodeMgr.h b/src/kernel/KernelKit/CodeMgr.h
index dc08fc99..8d8bce25 100644
--- a/src/kernel/KernelKit/CodeMgr.h
+++ b/src/kernel/KernelKit/CodeMgr.h
@@ -12,7 +12,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_CODEMGR_H
+#define KERNELKIT_CODEMGR_H
 
 #include <KernelKit/CoreProcessScheduler.h>
 #include <KernelKit/IPEFDylibObject.h>
@@ -47,3 +48,5 @@ BOOL rtl_create_kernel_task(HAL::StackFramePtr main, const KID kid);
 /// @return The team's process id.
 ProcessID rtl_create_user_process(rtl_start_kind main, const Char* process_name);
 }  // namespace Kernel
+
+#endif
diff --git a/src/kernel/KernelKit/Config.h b/src/kernel/KernelKit/Config.h
index f0d1e106..3b185a35 100644
--- a/src/kernel/KernelKit/Config.h
+++ b/src/kernel/KernelKit/Config.h
@@ -4,7 +4,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_CONFIG_H
+#define KERNELKIT_CONFIG_H
 
 #include <NeKit/Config.h>
 
@@ -16,4 +17,6 @@ class UserProcessScheduler;
 class IDylibObject;
 class UserProcess;
 class KernelTask;
-}  // namespace Kernel
\ No newline at end of file
+}  // namespace Kernel
+
+#endif
diff --git a/src/kernel/KernelKit/CoreProcessScheduler.h b/src/kernel/KernelKit/CoreProcessScheduler.h
index efb879f8..80651905 100644
--- a/src/kernel/KernelKit/CoreProcessScheduler.h
+++ b/src/kernel/KernelKit/CoreProcessScheduler.h
@@ -4,7 +4,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_COREPROCESSSCHEDULER_H
+#define KERNELKIT_COREPROCESSSCHEDULER_H
 
 #include <NeKit/Config.h>
 #include <NeKit/ErrorOr.h>
@@ -248,3 +249,5 @@ struct ProcessImage final {
   }
 };
 }  // namespace Kernel
+
+#endif
diff --git a/src/kernel/KernelKit/DebugOutput.h b/src/kernel/KernelKit/DebugOutput.h
index 0818a712..54599e95 100644
--- a/src/kernel/KernelKit/DebugOutput.h
+++ b/src/kernel/KernelKit/DebugOutput.h
@@ -4,7 +4,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_DEBUGOUTPUT_H
+#define KERNELKIT_DEBUGOUTPUT_H
 
 #include <CompilerKit/CompilerKit.h>
 #include <KernelKit/DeviceMgr.h>
@@ -204,3 +205,5 @@ inline TerminalDevice& operator<<(TerminalDevice& src, const Long& num) {
 #endif  // ifdef kendl8
 
 #define kendl8 utf_end_line()
+
+#endif
diff --git a/src/kernel/KernelKit/DeviceMgr.h b/src/kernel/KernelKit/DeviceMgr.h
index 56208140..45c5e50a 100644
--- a/src/kernel/KernelKit/DeviceMgr.h
+++ b/src/kernel/KernelKit/DeviceMgr.h
@@ -13,7 +13,8 @@
 
  ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_DEVICEMGR_H
+#define KERNELKIT_DEVICEMGR_H
 
 /* @note Device Mgr. */
 /* @file KernelKit/DeviceMgr.h */
@@ -131,3 +132,5 @@ enum {
   kDeviceTypeCount,
 };
 }  // namespace Kernel
+
+#endif
diff --git a/src/kernel/KernelKit/IDylibObject.h b/src/kernel/KernelKit/IDylibObject.h
index d834b8db..f0cb00c4 100644
--- a/src/kernel/KernelKit/IDylibObject.h
+++ b/src/kernel/KernelKit/IDylibObject.h
@@ -7,7 +7,8 @@
  *      ========================================================
  */
 
-#pragma once
+#ifndef KERNELKIT_IDYLIBOBJECT_H
+#define KERNELKIT_IDYLIBOBJECT_H
 
 #include <CompilerKit/CompilerKit.h>
 #include <NeKit/Config.h>
@@ -43,3 +44,5 @@ class IDylibObject {
 /// @brief Pure implementation, missing method/function handler.
 EXTERN_C void __ne_pure_call(void);
 }  // namespace Kernel
+
+#endif
diff --git a/src/kernel/KernelKit/IFS.h b/src/kernel/KernelKit/IFS.h
index c885d350..f62718d4 100644
--- a/src/kernel/KernelKit/IFS.h
+++ b/src/kernel/KernelKit/IFS.h
@@ -4,7 +4,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_IFS_H
+#define KERNELKIT_IFS_H
 
 #include <KernelKit/DriveMgr.h>
 
@@ -23,3 +24,5 @@ Int32 fs_ifs_read(IMountpoint* mnt, DriveTrait& drvTrait, Int32 drvIndex);
 /// @return Status code
 Int32 fs_ifs_write(IMountpoint* mnt, DriveTrait& drvTrait, Int32 drvIndex);
 }  // namespace Kernel
+
+#endif
diff --git a/src/kernel/KernelKit/ILoader.h b/src/kernel/KernelKit/ILoader.h
index 8a6b8bfa..dedff7ad 100644
--- a/src/kernel/KernelKit/ILoader.h
+++ b/src/kernel/KernelKit/ILoader.h
@@ -4,7 +4,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_ILOADER_H
+#define KERNELKIT_ILOADER_H
 
 #include <CompilerKit/CompilerKit.h>
 #include <NeKit/Config.h>
@@ -30,3 +31,5 @@ class ILoader {
   virtual _Output ErrorOr<VoidPtr> FindSymbol(_Input const Char*, _Input Int32)           { return ErrorOr<VoidPtr>{}; }
 };
 }  // namespace Kernel
+
+#endif
diff --git a/src/kernel/KernelKit/KPC.h b/src/kernel/KernelKit/KPC.h
index 4809f19f..63531f14 100644
--- a/src/kernel/KernelKit/KPC.h
+++ b/src/kernel/KernelKit/KPC.h
@@ -4,7 +4,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_KPC_H
+#define KERNELKIT_KPC_H
 
 #include <NeKit/Config.h>
 
@@ -77,3 +78,5 @@ inline constexpr KPCError kErrorUnimplemented = -1;
 /// @return if error-free: false, otherwise true.
 Boolean err_bug_check_raise(Void);
 }  // namespace Kernel
+
+#endif
diff --git a/src/kernel/KernelKit/KernelTaskScheduler.h b/src/kernel/KernelKit/KernelTaskScheduler.h
index a3fba2af..8564b043 100644
--- a/src/kernel/KernelKit/KernelTaskScheduler.h
+++ b/src/kernel/KernelKit/KernelTaskScheduler.h
@@ -4,7 +4,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_KERNELTASKSCHEDULER_H
+#define KERNELKIT_KERNELTASKSCHEDULER_H
 
 /// @file KernelTaskScheduler.h
 /// @brief Kernel Task Scheduler backend file.
@@ -46,4 +47,6 @@ class KernelTaskHelper final {
   STATIC ErrorOr<KID> TheCurrentKID();
   STATIC SizeT        StartScheduling();
 };
-}  // namespace Kernel
\ No newline at end of file
+}  // namespace Kernel
+
+#endif
diff --git a/src/kernel/KernelKit/LockDelegate.h b/src/kernel/KernelKit/LockDelegate.h
index 51f86780..c3778e19 100644
--- a/src/kernel/KernelKit/LockDelegate.h
+++ b/src/kernel/KernelKit/LockDelegate.h
@@ -4,7 +4,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_LOCKDELEGATE_H
+#define KERNELKIT_LOCKDELEGATE_H
 
 #include <NeKit/Atom.h>
 #include <NeKit/Config.h>
@@ -56,3 +57,5 @@ class LockDelegate final {
   Atom<UInt> fLockStatus;
 };
 }  // namespace Kernel
+
+#endif
diff --git a/src/kernel/KernelKit/PCI/DMA.h b/src/kernel/KernelKit/PCI/DMA.h
index d965a3c9..6ca34e0d 100644
--- a/src/kernel/KernelKit/PCI/DMA.h
+++ b/src/kernel/KernelKit/PCI/DMA.h
@@ -4,7 +4,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_DMA_H
+#define KERNELKIT_DMA_H
 
 #include <KernelKit/DeviceMgr.h>
 #include <KernelKit/PCI/Device.h>
@@ -73,3 +74,5 @@ class DMAFactory final {
 }  // namespace Kernel
 
 #include <KernelKit/PCI/DMA.inl>
+
+#endif
diff --git a/src/kernel/KernelKit/PCI/Database.h b/src/kernel/KernelKit/PCI/Database.h
index 35740fdc..adde60b6 100644
--- a/src/kernel/KernelKit/PCI/Database.h
+++ b/src/kernel/KernelKit/PCI/Database.h
@@ -3,7 +3,8 @@
   Copyright (C) 2024-2025, Amlal El Mahrouss, licensed under the Apache 2.0 license.
 
 ======================================== */
-#pragma once
+#ifndef KERNELKIT_DATABASE_H
+#define KERNELKIT_DATABASE_H
 
 #include <KernelKit/PCI/Device.h>
 #include <NeKit/Config.h>
@@ -48,4 +49,6 @@ inline BOOL operator!=(Kernel::UChar lhs, const Kernel::Types::PciDeviceKind& rh
 
 inline BOOL operator==(Kernel::UChar lhs, const Kernel::Types::PciDeviceKind& rhs) {
   return lhs == (Kernel::UChar) rhs;
-}
\ No newline at end of file
+}
+
+#endif
diff --git a/src/kernel/KernelKit/PCI/Device.h b/src/kernel/KernelKit/PCI/Device.h
index 3e7284de..e585029d 100644
--- a/src/kernel/KernelKit/PCI/Device.h
+++ b/src/kernel/KernelKit/PCI/Device.h
@@ -4,7 +4,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_DEVICE_H
+#define KERNELKIT_DEVICE_H
 
 #include <NeKit/Config.h>
 #include <NeKit/KernelPanic.h>
@@ -73,3 +74,5 @@ class Device final {
   UInt32 fBar;
 };
 }  // namespace Kernel::PCI
+
+#endif
diff --git a/src/kernel/KernelKit/PCI/Express.h b/src/kernel/KernelKit/PCI/Express.h
index b3411938..e33f9a5d 100644
--- a/src/kernel/KernelKit/PCI/Express.h
+++ b/src/kernel/KernelKit/PCI/Express.h
@@ -4,9 +4,12 @@
 
 ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_EXPRESS_H
+#define KERNELKIT_EXPRESS_H
 
 #include <KernelKit/PCI/PCI.h>
 #include <NeKit/Config.h>
 
 #define PCI_EXPRESS_BUS_COUNT (4096)
+
+#endif
diff --git a/src/kernel/KernelKit/PCI/IO.h b/src/kernel/KernelKit/PCI/IO.h
index dc9f9aa1..65cbf28e 100644
--- a/src/kernel/KernelKit/PCI/IO.h
+++ b/src/kernel/KernelKit/PCI/IO.h
@@ -4,7 +4,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_IO_H
+#define KERNELKIT_IO_H
 
 #include <ArchKit/ArchKit.h>
 #include <NeKit/Array.h>
@@ -61,3 +62,5 @@ inline Array<UShort, Sz> make_ports(UShort base) {
 #else
 #error Please provide platform specific code for the I/O
 #endif  // ifdef __NE_AMD64__
+
+#endif
diff --git a/src/kernel/KernelKit/PCI/PCI.h b/src/kernel/KernelKit/PCI/PCI.h
index a60145fd..d57478e8 100644
--- a/src/kernel/KernelKit/PCI/PCI.h
+++ b/src/kernel/KernelKit/PCI/PCI.h
@@ -4,7 +4,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_PCI_H
+#define KERNELKIT_PCI_H
 
 #include <NeKit/Config.h>
 
@@ -52,3 +53,5 @@ class BAR {
   Detail::BAR BAR5;
 };
 }  // namespace Kernel::PCI
+
+#endif
diff --git a/src/kernel/KernelKit/PE32CodeMgr.h b/src/kernel/KernelKit/PE32CodeMgr.h
index 3e359a7c..d5af331c 100644
--- a/src/kernel/KernelKit/PE32CodeMgr.h
+++ b/src/kernel/KernelKit/PE32CodeMgr.h
@@ -11,7 +11,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_PE32CODEMGR_H
+#define KERNELKIT_PE32CODEMGR_H
 
 ////////////////////////////////////////////////////
 
@@ -85,4 +86,6 @@ using PE_SECTION_INFO = LDR_SECTION_HEADER;
 
 ProcessID rtl_create_user_process(PE32Loader&                        exec,
                                   const UserProcess::ExecutableKind& process_kind);
-}  // namespace Kernel
\ No newline at end of file
+}  // namespace Kernel
+
+#endif
diff --git a/src/kernel/KernelKit/ProcessScheduler.h b/src/kernel/KernelKit/ProcessScheduler.h
index 74a238f1..d093871b 100644
--- a/src/kernel/KernelKit/ProcessScheduler.h
+++ b/src/kernel/KernelKit/ProcessScheduler.h
@@ -4,7 +4,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_PROCESSSCHEDULER_H
+#define KERNELKIT_PROCESSSCHEDULER_H
 
 #include <KernelKit/KernelTaskScheduler.h>
 #include <KernelKit/UserProcessScheduler.h>
@@ -16,4 +17,6 @@ inline UserProcessTeam kHighUserTeam;
 inline UserProcessTeam kMidUserTeam;
 inline UserProcessTeam kRTUserTeam;
 }  // namespace Kernel
+#endif
+
 #endif
\ No newline at end of file
diff --git a/src/kernel/KernelKit/ZXD.h b/src/kernel/KernelKit/ZXD.h
index 1ead7b1f..b7d723d6 100644
--- a/src/kernel/KernelKit/ZXD.h
+++ b/src/kernel/KernelKit/ZXD.h
@@ -4,7 +4,8 @@
 
 ======================================== */
 
-#pragma once
+#ifndef KERNELKIT_ZXD_H
+#define KERNELKIT_ZXD_H
 
 #include <NeKit/Config.h>
 
@@ -57,3 +58,5 @@ inline constexpr auto kProsanName = ".pros";
 using ZxdExecPtr = ZxdExec*;
 using ZxdStubPtr = ZxdStub*;
 }  // namespace Kernel
+
+#endif