From 95cd78840f0891e60f5ebecc8a8eb4fbaf3c2ebf Mon Sep 17 00:00:00 2001 From: Danny Holman Date: Sun, 12 Jan 2025 01:17:36 -0600 Subject: PROJECT RESTRUCTURING Move the entire kernel into its own directory. Create new directories for system commands, libraries and other required essentials for a complete Unix-like operating system. Signed-off-by: Danny Holman --- kernel/sched.c | 74 ---------------------------------------------------------- 1 file changed, 74 deletions(-) delete mode 100644 kernel/sched.c (limited to 'kernel/sched.c') diff --git a/kernel/sched.c b/kernel/sched.c deleted file mode 100644 index b6096da..0000000 --- a/kernel/sched.c +++ /dev/null @@ -1,74 +0,0 @@ -#include -#include -#include -#include -#include -#include -#include - -static struct kthread *run_queue = NULL; -static struct kthread *wait_queue = NULL; -static struct kthread *cur = NULL; - -static int scheduler_enabled = 0; -static struct kmutex scheduler_lock; - -void sched_init(void) { - disable_ints(); - cur = kthread_create(NULL, NULL); - cur->stack = NULL; - switch_thread(cur, cur); - cur->state = THREAD_RUNNING; - scheduler_enabled = 1; - enable_ints(); -} - -void schedule_next(void) { - if (scheduler_enabled == 0) - return; - if (run_queue == NULL) - return; - - struct kthread *thread = cur; - schedule_thread(cur); - cur = run_queue; - run_queue = run_queue->next; - cur->next = NULL; - cur->state = THREAD_RUNNING; - switch_thread(thread, cur); -} - -void schedule_thread(struct kthread *thread) { - if (run_queue == NULL) { - run_queue = thread; - return; - } - - kmutex_lock(&scheduler_lock); - struct kthread *temp = run_queue; - while (temp->next != NULL) - temp = temp->next; - temp->next = thread; - thread->state = THREAD_READY; - kmutex_unlock(&scheduler_lock); -} - -void block_thread(struct kthread *thread) { - kmutex_lock(&scheduler_lock); - thread->next = wait_queue; - wait_queue = thread; - kmutex_unlock(&scheduler_lock); -} - -void unblock_thread(struct kthread *thread) { - kmutex_lock(&scheduler_lock); - struct kthread *temp = wait_queue; - while (temp != NULL) { - if (temp->next == thread) { - temp->next = thread->next; - return; - } - temp = temp->next; - } - kmutex_unlock(&scheduler_lock); -} -- cgit v1.2.3