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#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "../port/error.h"
#include <isa.h>
#include <interp.h>
#include "kernel.h"
#define QP(l) (Prog**)((char*)(l)+sizeof(QLock))
void*
libqlowner(void *l)
{
return *QP(l);
}
void
libqlock(void *l)
{
Prog *p;
QLock *q;
q = l;
p = currun();
if(p == nil)
panic("libqlock");
if(!canqlock(q)) {
release();
qlock(q);
acquire();
}
*QP(l) = p;
}
void
libqunlock(void *l)
{
Prog *p;
QLock *q;
q = l;
p = currun();
if(p == nil)
panic("libqunlock 1");
if(*QP(l) != p)
panic("libqunlock 2");
*QP(l) = nil;
qunlock(q);
}
void*
libqlalloc(void)
{
QLock *q;
q = mallocz(sizeof(QLock)+sizeof(Prog*), 1);
return q;
}
void
libqlfree(void *l)
{
free(l);
}
vlong
libseek(int fd, vlong off, int whence)
{
release();
off = kseek(fd, off, whence);
acquire();
return off;
}
int
libread(int fd, void *buf, int n)
{
release();
n = kread(fd, buf, n);
acquire();
return n;
}
int
libreadn(int fd, void *av, long n)
{
char *a;
long m, t;
a = av;
t = 0;
release();
while(t < n){
m = kread(fd, a+t, n-t);
if(m <= 0){
if(t == 0){
acquire();
return m;
}
break;
}
t += m;
}
acquire();
return t;
}
int
libwrite(int fd, void *buf, int n)
{
release();
n = kwrite(fd, buf, n);
acquire();
return n;
}
int
libopen(char *name, int omode)
{
int fd;
release();
fd = kopen(name, omode);
acquire();
return fd;
}
int
libclose(int fd)
{
release();
fd = kclose(fd);
acquire();
return fd;
}
Dir*
libdirfstat(int fd)
{
Dir *d;
release();
d = kdirfstat(fd);
acquire();
return d;
}
int
libbind(char *s, char *t, int f)
{
int n;
release();
n = kbind(s, t, f);
acquire();
return n;
}
void
libchanclose(void *chan)
{
release();
cclose(chan);
acquire();
}
void*
libfdtochan(int fd, int mode)
{
Chan *c;
release();
if(waserror()) {
acquire();
return nil;
}
c = fdtochan(up->env->fgrp, fd, mode, 0, 1);
poperror();
acquire();
return c;
}
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