diff --git a/core/sys/windows/kernel32.odin b/core/sys/windows/kernel32.odin
index ff27cf79541..9fb862815e9 100644
--- a/core/sys/windows/kernel32.odin
+++ b/core/sys/windows/kernel32.odin
@@ -213,6 +213,16 @@ foreign kernel32 {
 	) -> BOOL ---
 	WaitForSingleObject :: proc(hHandle: HANDLE, dwMilliseconds: DWORD) -> DWORD ---
 	WaitForSingleObjectEx :: proc(hHandle: HANDLE, dwMilliseconds: DWORD, bAlterable: BOOL) -> DWORD ---
+	EnterSynchronizationBarrier :: proc(
+		lpBarrier: ^SYNCHRONIZATION_BARRIER,
+		dwFlags: SYNCHRONIZATION_BARRIER_FLAGS,
+	) -> BOOL ---
+	InitializeSynchronizationBarrier :: proc(
+		lpBarrier: ^SYNCHRONIZATION_BARRIER,
+		lTotalThreads: LONG,
+		lSpinCount: LONG,
+	) -> BOOL ---
+	DeleteSynchronizationBarrier :: proc(lpBarrier: ^SYNCHRONIZATION_BARRIER) -> BOOL ---
 	Sleep :: proc(dwMilliseconds: DWORD) ---
 	GetProcessId :: proc(handle: HANDLE) -> DWORD ---
 	CopyFileW :: proc(
diff --git a/core/sys/windows/types.odin b/core/sys/windows/types.odin
index 904970589c2..61e5d7820c3 100644
--- a/core/sys/windows/types.odin
+++ b/core/sys/windows/types.odin
@@ -2991,6 +2991,21 @@ CRITICAL_SECTION :: struct {
 	SpinCount: ULONG_PTR,
 }
 
+SYNCHRONIZATION_BARRIER :: struct {
+	Reserved1:  DWORD,
+	Reserved2:  DWORD,
+	Reserved3:  [2]ULONG_PTR,
+	Reserved4:  DWORD,
+	Reserved5:  DWORD,
+}
+
+SYNCHRONIZATION_BARRIER_FLAG :: enum {
+	SPIN_ONLY  = 0,
+	BLOCK_ONLY = 1,
+	NO_DELETE  = 2,
+}
+SYNCHRONIZATION_BARRIER_FLAGS :: distinct bit_set[SYNCHRONIZATION_BARRIER_FLAG; DWORD]
+
 REPARSE_MOUNTPOINT_DATA_BUFFER :: struct {
 	ReparseTag: DWORD,
 	ReparseDataLength: DWORD,
diff --git a/core/sys/windows/user32.odin b/core/sys/windows/user32.odin
index 49ebb49cbd1..4eb389f6b11 100644
--- a/core/sys/windows/user32.odin
+++ b/core/sys/windows/user32.odin
@@ -398,6 +398,14 @@ MAKEINTRESOURCEW :: #force_inline proc "contextless" (#any_int i: int) -> LPWSTR
 	return cast(LPWSTR)uintptr(WORD(i))
 }
 
+RAWINPUT_ALIGN :: proc(x: uintptr) -> uintptr {
+	return (x + size_of(uintptr) - 1) & ~uintptr(size_of(uintptr) - 1)
+}
+
+NEXTRAWINPUTBLOCK :: proc(ptr: ^RAWINPUT) -> ^RAWINPUT {
+	return cast(^RAWINPUT)RAWINPUT_ALIGN(uintptr(ptr) + uintptr(ptr.header.dwSize))
+}
+
 Monitor_From_Flags :: enum DWORD {
 	MONITOR_DEFAULTTONULL    = 0x00000000, // Returns NULL
 	MONITOR_DEFAULTTOPRIMARY = 0x00000001, // Returns a handle to the primary display monitor