Initial Upload

sleeplock.c

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+// Sleeping locks
+
+#include "types.h"
+#include "defs.h"
+#include "param.h"
+#include "x86.h"
+#include "memlayout.h"
+#include "mmu.h"
+#include "proc.h"
+#include "spinlock.h"
+#include "sleeplock.h"
+
+void initsleeplock(struct sleeplock *lk, char *name) {
+    initlock(&lk->lk, "sleep lock");
+    lk->name = name;
+    lk->locked = 0;
+    lk->pid = 0;
+}
+
+void acquiresleep(struct sleeplock *lk) {
+    acquire(&lk->lk);
+    while (lk->locked) {
+        sleep(lk, &lk->lk);
+    }
+    lk->locked = 1;
+    lk->pid = myproc()->pid;
+    release(&lk->lk);
+}
+
+void releasesleep(struct sleeplock *lk) {
+    acquire(&lk->lk);
+    lk->locked = 0;
+    lk->pid = 0;
+    wakeup(lk);
+    release(&lk->lk);
+}
+
+int holdingsleep(struct sleeplock *lk) {
+    int r;
+
+    acquire(&lk->lk);
+    r = lk->locked && (lk->pid == myproc()->pid);
+    release(&lk->lk);
+    return r;
+}
+
+
+