X-Git-Url: https://scm.lunaixsky.com/lunaix-os.git/blobdiff_plain/c50398ab4cb09658b3b3fff74804d2f26df785e7..4b6190b935dd75d8ddd514a05c7c7343e32c0cdc:/lunaix-os/kernel/ds/mutex.c

diff --git a/lunaix-os/kernel/ds/mutex.c b/lunaix-os/kernel/ds/mutex.c
new file mode 100644
index 0000000..7bfbf10
--- /dev/null
+++ b/lunaix-os/kernel/ds/mutex.c
@@ -0,0 +1,24 @@
+#include <lunaix/ds/mutex.h>
+#include <lunaix/process.h>
+
+void
+mutex_lock(mutex_t* mutex)
+{
+    sem_wait(&mutex->sem);
+    mutex->owner = __current->pid;
+}
+
+void
+mutex_unlock(mutex_t* mutex)
+{
+    mutex_unlock_for(mutex, __current->pid);
+}
+
+void
+mutex_unlock_for(mutex_t* mutex, pid_t pid)
+{
+    if (mutex->owner != pid) {
+        return;
+    }
+    sem_post(&mutex->sem);
+}
\ No newline at end of file