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#include "dat.h"
#include "fns.h"
#include "error.h"
#undef _POSIX_C_SOURCE
#undef getwd
#include <unistd.h>
#include <signal.h>
#include <pthread.h>
#include <errno.h>
#include <semaphore.h>
typedef struct Osdep Osdep;
struct Osdep {
sem_t sem;
pthread_t self;
};
static pthread_key_t prdakey;
extern int dflag;
Proc*
getup(void)
{
return pthread_getspecific(prdakey);
}
void
pexit(char *msg, int t)
{
Osenv *e;
Proc *p;
Osdep *os;
USED(t);
lock(&procs.l);
p = up;
if(p->prev)
p->prev->next = p->next;
else
procs.head = p->next;
if(p->next)
p->next->prev = p->prev;
else
procs.tail = p->prev;
unlock(&procs.l);
if(0)
print("pexit: %s: %s\n", p->text, msg);
e = p->env;
if(e != nil) {
closefgrp(e->fgrp);
closepgrp(e->pgrp);
closeegrp(e->egrp);
closesigs(e->sigs);
free(e->user);
}
free(p->prog);
os = p->os;
if(os != nil){
sem_destroy(&os->sem);
free(os);
}
free(p);
pthread_exit(0);
}
static void*
tramp(void *arg)
{
Proc *p;
Osdep *os;
p = arg;
os = p->os;
os->self = pthread_self();
if(pthread_setspecific(prdakey, arg))
panic("set specific data failed in tramp\n");
p->func(p->arg);
pexit("{Tramp}", 0);
return nil;
}
void
kproc(char *name, void (*func)(void*), void *arg, int flags)
{
pthread_t thread;
Proc *p;
Pgrp *pg;
Fgrp *fg;
Egrp *eg;
pthread_attr_t attr;
Osdep *os;
p = newproc();
if(p == nil)
panic("kproc: no memory");
os = malloc(sizeof(*os));
if(os == nil)
panic("kproc: no memory");
os->self = 0; /* set by tramp */
sem_init(&os->sem, 0, 0);
p->os = os;
if(flags & KPDUPPG) {
pg = up->env->pgrp;
incref(&pg->r);
p->env->pgrp = pg;
}
if(flags & KPDUPFDG) {
fg = up->env->fgrp;
incref(&fg->r);
p->env->fgrp = fg;
}
if(flags & KPDUPENVG) {
eg = up->env->egrp;
incref(&eg->r);
p->env->egrp = eg;
}
p->env->uid = up->env->uid;
p->env->gid = up->env->gid;
kstrdup(&p->env->user, up->env->user);
strcpy(p->text, name);
p->func = func;
p->arg = arg;
lock(&procs.l);
if(procs.tail != nil) {
p->prev = procs.tail;
procs.tail->next = p;
} else {
procs.head = p;
p->prev = nil;
}
procs.tail = p;
unlock(&procs.l);
memset(&attr, 0, sizeof(attr));
if(pthread_attr_init(&attr) == -1)
panic("pthread_attr_init failed");
if(flags & KPX11)
pthread_attr_setstacksize(&attr, 512*1024); /* could be a parameter */
else if(KSTACK > 0)
pthread_attr_setstacksize(&attr, KSTACK);
pthread_attr_setinheritsched(&attr, PTHREAD_INHERIT_SCHED);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
if(pthread_create(&thread, &attr, tramp, p))
panic("thr_create failed\n");
pthread_attr_destroy(&attr);
}
/* called to wake up kproc blocked on a syscall */
void
oshostintr(Proc *p)
{
Osdep *os;
os = p->os;
if(os != nil && os->self != 0)
pthread_kill(os->self, SIGUSR1);
}
void
osblock(void)
{
Osdep *os;
os = up->os;
while(sem_wait(&os->sem))
{} /* retry on signals (which shouldn't happen) */
}
void
osready(Proc *p)
{
Osdep *os;
os = p->os;
sem_post(&os->sem);
}
void
kprocinit(Proc *p)
{
if(pthread_key_create(&prdakey, NULL))
panic("key_create failed");
if(pthread_setspecific(prdakey, p))
panic("set specific thread data failed");
}
void
osyield(void)
{
// pthread_yield_np();
/* define pthread_yield to be sched_yield or pthread_yield_np if required */
pthread_yield();
}
void
ospause(void)
{
/* main just wants this thread to go away */
pthread_exit(0);
}
void
oslopri(void)
{
struct sched_param param;
int policy;
pthread_t self;
self = pthread_self();
pthread_getschedparam(self, &policy, ¶m);
param.sched_priority = sched_get_priority_min(policy);
pthread_setschedparam(self, policy, ¶m);
}
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