nexoniarz/SchOS
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Initial commit: Schunix as it stands before the SchOS rename

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An x86-64 operating system built from xv6, now largely rewritten: SMP,
a copy-on-write root filesystem (SchFS), PCI/USB/virtio drivers, a TTF
rasteriser, and a Linux-numbered syscall ABI.

No history before this point -- the tree was never under version control.
This commit exists so the rename that follows has something to undo to.
This commit is contained in:
Nexoniarz 2026-08-09 13:47:01 +02:00
commit d0f7acf9eb
275 changed files with 51417 additions and 0 deletions
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55
kernel/core/sleeplock.c Normal file
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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;
if (myproc()) {
lk->pid = myproc()->pid;
} else {
lk->pid = 0;
}
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)
{
acquire(&lk->lk);
int r = lk->locked;
release(&lk->lk);
return r;
}