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In preparation for switching linuxulator to the use the native 1:1

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threads introduce kern_thr_alloc() which will be used later in the
linux_clone().

Differential Revision:	https://reviews.freebsd.org/D1029
Reviewed by:	trasz
This commit is contained in:
Dmitry Chagin 2015-05-24 14:37:45 +00:00
parent 95be6d2b1f
commit 09baafb471
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=283373
2 changed files with 20 additions and 10 deletions
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29
sys/kern/kern_thr.c
View File

@ -162,12 +162,6 @@ create_thread(struct thread *td, mcontext_t *ctx,
p = td->td_proc;
/* Have race condition but it is cheap. */
if (p->p_numthreads >= max_threads_per_proc) {
++max_threads_hits;
return (EPROCLIM);
}
if (rtp != NULL) {
switch(rtp->type) {
case RTP_PRIO_REALTIME:
@ -197,11 +191,9 @@ create_thread(struct thread *td, mcontext_t *ctx,
#endif
/* Initialize our td */
newtd = thread_alloc(0);
if (newtd == NULL) {
error = ENOMEM;
error = kern_thr_alloc(p, 0, &newtd);
if (error)
goto fail;
}
cpu_set_upcall(newtd, td);
@ -566,3 +558,20 @@ sys_thr_set_name(struct thread *td, struct thr_set_name_args *uap)
PROC_UNLOCK(p);
return (error);
}
int
kern_thr_alloc(struct proc *p, int pages, struct thread **ntd)
{
/* Have race condition but it is cheap. */
if (p->p_numthreads >= max_threads_per_proc) {
++max_threads_hits;
return (EPROCLIM);
}
*ntd = thread_alloc(pages);
if (*ntd == NULL)
return (ENOMEM);
return (0);
}

1
sys/sys/syscallsubr.h
View File

@ -214,6 +214,7 @@ int kern_ktimer_settime(struct thread *td, int timer_id, int flags,
int kern_ktimer_gettime(struct thread *td, int timer_id,
struct itimerspec *val);
int kern_ktimer_getoverrun(struct thread *td, int timer_id);
int kern_thr_alloc(struct proc *, int pages, struct thread **);
int kern_thr_exit(struct thread *td);
int kern_thr_new(struct thread *td, struct thr_param *param);
int kern_thr_suspend(struct thread *td, struct timespec *tsp);