55abb0929e
To avoid symbol conflicts with dependent packages the debug header must be split in to several parts. The <sys/debug.h> header now only contains the Solaris macro's such as ASSERT and VERIFY. The spl-debug.h header contain the spl specific debugging infrastructure and should be included by any package which needs to use the spl logging. Finally the spl-trace.h header contains internal data structures only used for the log facility and should not be included by anythign by spl-debug.c. This way dependent packages can include the standard Solaris headers without picking up any SPL debug macros. However, if the dependant package want to integrate with the SPL debugging subsystem they can then explicitly include spl-debug.h. Along with this change I have dropped the CHECK_STACK macros because the upstream Linux kernel now has much better stack depth checking built in and we don't need this complexity. Additionally SBUG has been replaced with PANIC and provided as part of the Solaris macro set. While the Solaris version is really panic() that conflicts with the Linux kernel so we'll just have to make due to PANIC. It should rarely be called directly, the prefered usage would be an ASSERT or VERIFY. There's lots of change here but this cleanup was overdue.
138 lines
3.9 KiB
C
138 lines
3.9 KiB
C
/*****************************************************************************\
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* Copyright (C) 2007-2010 Lawrence Livermore National Security, LLC.
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* Copyright (C) 2007 The Regents of the University of California.
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* Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
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* Written by Brian Behlendorf <behlendorf1@llnl.gov>.
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* UCRL-CODE-235197
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*
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* This file is part of the SPL, Solaris Porting Layer.
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* For details, see <http://github.com/behlendorf/spl/>.
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*
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* The SPL is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* The SPL is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the SPL. If not, see <http://www.gnu.org/licenses/>.
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*****************************************************************************
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* Solaris Porting Layer (SPL) Thread Implementation.
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\*****************************************************************************/
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#include <sys/thread.h>
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#include <sys/kmem.h>
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#include <spl-debug.h>
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#ifdef DEBUG_SUBSYSTEM
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#undef DEBUG_SUBSYSTEM
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#endif
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#define DEBUG_SUBSYSTEM S_THREAD
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/*
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* Thread interfaces
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*/
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typedef struct thread_priv_s {
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unsigned long tp_magic; /* Magic */
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int tp_name_size; /* Name size */
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char *tp_name; /* Name (without _thread suffix) */
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void (*tp_func)(void *); /* Registered function */
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void *tp_args; /* Args to be passed to function */
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size_t tp_len; /* Len to be passed to function */
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int tp_state; /* State to start thread at */
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pri_t tp_pri; /* Priority to start threat at */
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} thread_priv_t;
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static int
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thread_generic_wrapper(void *arg)
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{
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thread_priv_t *tp = (thread_priv_t *)arg;
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void (*func)(void *);
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void *args;
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ASSERT(tp->tp_magic == TP_MAGIC);
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func = tp->tp_func;
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args = tp->tp_args;
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set_current_state(tp->tp_state);
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set_user_nice((kthread_t *)get_current(), PRIO_TO_NICE(tp->tp_pri));
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kmem_free(tp->tp_name, tp->tp_name_size);
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kmem_free(tp, sizeof(thread_priv_t));
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if (func)
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func(args);
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return 0;
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}
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void
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__thread_exit(void)
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{
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ENTRY;
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EXIT;
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complete_and_exit(NULL, 0);
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/* Unreachable */
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}
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EXPORT_SYMBOL(__thread_exit);
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/* thread_create() may block forever if it cannot create a thread or
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* allocate memory. This is preferable to returning a NULL which Solaris
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* style callers likely never check for... since it can't fail. */
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kthread_t *
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__thread_create(caddr_t stk, size_t stksize, thread_func_t func,
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const char *name, void *args, size_t len, proc_t *pp,
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int state, pri_t pri)
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{
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thread_priv_t *tp;
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struct task_struct *tsk;
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char *p;
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ENTRY;
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/* Option pp is simply ignored */
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/* Variable stack size unsupported */
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ASSERT(stk == NULL);
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tp = kmem_alloc(sizeof(thread_priv_t), KM_SLEEP);
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if (tp == NULL)
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RETURN(NULL);
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tp->tp_magic = TP_MAGIC;
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tp->tp_name_size = strlen(name) + 1;
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tp->tp_name = kmem_alloc(tp->tp_name_size, KM_SLEEP);
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if (tp->tp_name == NULL) {
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kmem_free(tp, sizeof(thread_priv_t));
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RETURN(NULL);
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}
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strncpy(tp->tp_name, name, tp->tp_name_size);
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/* Strip trailing "_thread" from passed name which will be the func
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* name since the exposed API has no parameter for passing a name.
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*/
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p = strstr(tp->tp_name, "_thread");
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if (p)
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p[0] = '\0';
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tp->tp_func = func;
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tp->tp_args = args;
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tp->tp_len = len;
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tp->tp_state = state;
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tp->tp_pri = pri;
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tsk = kthread_create(thread_generic_wrapper, (void *)tp,
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"%s", tp->tp_name);
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if (IS_ERR(tsk)) {
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CERROR("Failed to create thread: %ld\n", PTR_ERR(tsk));
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RETURN(NULL);
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}
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wake_up_process(tsk);
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RETURN((kthread_t *)tsk);
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}
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EXPORT_SYMBOL(__thread_create);
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