2 * Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
3 * Copyright (C) 2007 The Regents of the University of California.
4 * Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
5 * Written by Brian Behlendorf <behlendorf1@llnl.gov>.
8 * This file is part of the SPL, Solaris Porting Layer.
10 * The SPL is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2 of the License, or (at your
13 * option) any later version.
15 * The SPL is distributed in the hope that it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
20 * You should have received a copy of the GNU General Public License along
21 * with the SPL. If not, see <http://www.gnu.org/licenses/>.
23 * Solaris Porting Layer (SPL) Thread Implementation.
26 #include <sys/thread.h>
33 typedef struct thread_priv_s {
34 unsigned long tp_magic; /* Magic */
35 int tp_name_size; /* Name size */
36 char *tp_name; /* Name (without _thread suffix) */
37 void (*tp_func)(void *); /* Registered function */
38 void *tp_args; /* Args to be passed to function */
39 size_t tp_len; /* Len to be passed to function */
40 int tp_state; /* State to start thread at */
41 pri_t tp_pri; /* Priority to start threat at */
45 thread_generic_wrapper(void *arg)
47 thread_priv_t *tp = (thread_priv_t *)arg;
51 ASSERT(tp->tp_magic == TP_MAGIC);
54 set_current_state(tp->tp_state);
55 set_user_nice((kthread_t *)current, PRIO_TO_NICE(tp->tp_pri));
56 kmem_free(tp->tp_name, tp->tp_name_size);
57 kmem_free(tp, sizeof (thread_priv_t));
69 complete_and_exit(NULL, 0);
72 EXPORT_SYMBOL(__thread_exit);
75 * thread_create() may block forever if it cannot create a thread or
76 * allocate memory. This is preferable to returning a NULL which Solaris
77 * style callers likely never check for... since it can't fail.
80 __thread_create(caddr_t stk, size_t stksize, thread_func_t func,
81 const char *name, void *args, size_t len, proc_t *pp, int state, pri_t pri)
84 struct task_struct *tsk;
87 /* Option pp is simply ignored */
88 /* Variable stack size unsupported */
91 tp = kmem_alloc(sizeof (thread_priv_t), KM_PUSHPAGE);
95 tp->tp_magic = TP_MAGIC;
96 tp->tp_name_size = strlen(name) + 1;
98 tp->tp_name = kmem_alloc(tp->tp_name_size, KM_PUSHPAGE);
99 if (tp->tp_name == NULL) {
100 kmem_free(tp, sizeof (thread_priv_t));
104 strncpy(tp->tp_name, name, tp->tp_name_size);
107 * Strip trailing "_thread" from passed name which will be the func
108 * name since the exposed API has no parameter for passing a name.
110 p = strstr(tp->tp_name, "_thread");
117 tp->tp_state = state;
120 tsk = spl_kthread_create(thread_generic_wrapper, (void *)tp,
125 wake_up_process(tsk);
126 return ((kthread_t *)tsk);
128 EXPORT_SYMBOL(__thread_create);
131 * spl_kthread_create - Wrapper providing pre-3.13 semantics for
132 * kthread_create() in which it is not killable and less likely
136 spl_kthread_create(int (*func)(void *), void *data, const char namefmt[], ...)
138 struct task_struct *tsk;
140 char name[TASK_COMM_LEN];
142 va_start(args, namefmt);
143 vsnprintf(name, sizeof (name), namefmt, args);
146 tsk = kthread_create(func, data, "%s", name);
148 if (signal_pending(current)) {
149 clear_thread_flag(TIF_SIGPENDING);
152 if (PTR_ERR(tsk) == -ENOMEM)
160 EXPORT_SYMBOL(spl_kthread_create);