Kernel: Scheduler can now block threads based on tid

kernel/include/kernel/Scheduler.h

@@ -26,6 +26,7 @@ namespace Kernel
 
 		void block_current_thread(Semaphore*);
 		void unblock_threads(Semaphore*);
+		void unblock_thread(pid_t tid);
 
 		Thread& current_thread();
 		static pid_t current_tid();

kernel/kernel/Scheduler.cpp

@@ -351,7 +351,26 @@ namespace Kernel
 				it++;
 			}
 		}
+	}
 
+	void Scheduler::unblock_thread(pid_t tid)
+	{
+		CriticalScope _;
+
+		for (auto it = m_blocking_threads.begin(); it != m_blocking_threads.end(); it++)
+		{
+			if (it->thread->tid() == tid)
+			{
+				auto thread = it->thread;
+				it = m_blocking_threads.remove(it);
+
+				// This should work as we released enough memory from active thread
+				static_assert(sizeof(ActiveThread) == sizeof(BlockingThread));
+				MUST(m_active_threads.emplace_back(thread));
+
+				return;
+			}
+		}
 	}
 
 }