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#include <u.h>
#include <sched.h>
#include <signal.h>
#include <libc.h>
#include "9proc.h"
int fforkstacksize = 16384;
static int
tramp(void *v)
{
void (*fn)(void*), *arg;
void **v2;
_p9uproc(0);
v2 = v;
fn = v2[0];
arg = v2[1];
free(v2);
fn(arg);
return 0;
}
int
ffork(int flags, void (*fn)(void*), void *arg)
{
void **v;
char *p;
int cloneflag, pid;
_p9uproc(0);
p = malloc(fforkstacksize);
v = malloc(sizeof(void*)*2);
if(p==nil || v==nil){
free(p);
free(v);
return -1;
}
cloneflag = 0;
flags &= ~RFPROC;
if(flags&RFMEM){
cloneflag |= CLONE_VM;
flags &= ~RFMEM;
}
if(!(flags&RFFDG))
cloneflag |= CLONE_FILES;
else
flags &= ~RFFDG;
if(!(flags&RFNOWAIT))
cloneflag |= SIGCHLD;
else
flags &= ~RFNOWAIT;
if(flags){
fprint(2, "unknown rfork flags %x\n", flags);
free(p);
free(v);
return -1;
}
v[0] = fn;
v[1] = arg;
pid = clone(tramp, p+fforkstacksize-16, cloneflag, v);
if(pid < 0)
free(p);
return pid;
}
int
getfforkid(void)
{
return getpid();
}
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