57 lines
898 B
C
57 lines
898 B
C
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// TODO: CHECK/REPLACE/UPDATE OLD CODE (this file is based on xv6)
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// Sleeping locks
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#include "types.h"
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#include "riscv.h"
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#include "defs.h"
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#include "param.h"
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#include "memlayout.h"
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#include "sched.h"
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#include "proc.h"
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#include "sched.h"
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void
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initsleeplock(sched_sleeplock_t *lk, char *name)
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{
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initlock(&lk->spin, "sleep lock");
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lk->debugstring = name;
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lk->islocked = 0;
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lk->pid = 0;
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}
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void
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acquiresleep(sched_sleeplock_t *lk)
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{
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acquire(&lk->spin);
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while (lk->islocked) {
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sleep(lk, &lk->spin);
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}
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lk->islocked = 1;
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lk->pid = myproc()->pid;
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release(&lk->spin);
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}
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void
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releasesleep(sched_sleeplock_t *lk)
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{
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acquire(&lk->spin);
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lk->islocked = 0;
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lk->pid = 0;
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sched_wake(lk);
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release(&lk->spin);
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}
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int
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holdingsleep(sched_sleeplock_t *lk)
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{
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int r;
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acquire(&lk->spin);
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r = lk->islocked && (lk->pid == myproc()->pid);
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release(&lk->spin);
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return r;
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}
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