1016 lines
27 KiB
C
1016 lines
27 KiB
C
/*
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* Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by John Birrell.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Private thread definitions for the uthread kernel.
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*
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* $FreeBSD$
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*/
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#ifndef _THR_PRIVATE_H
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#define _THR_PRIVATE_H
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/*
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* Evaluate the storage class specifier.
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*/
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#ifdef GLOBAL_PTHREAD_PRIVATE
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#define SCLASS
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#else
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#define SCLASS extern
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#endif
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/*
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* Include files.
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*/
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#include <signal.h>
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#include <stdio.h>
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#include <sys/queue.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/cdefs.h>
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#include <sched.h>
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#include <spinlock.h>
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#include <ucontext.h>
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#include <pthread_np.h>
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/*
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* Kernel fatal error handler macro.
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*/
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#define PANIC(string) _thread_exit(__FILE__,__LINE__,string)
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/* Output debug messages like this: */
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#define stdout_debug(args...) do { \
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char buf[128]; \
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snprintf(buf, sizeof(buf), ##args); \
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__sys_write(1, buf, strlen(buf)); \
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} while (0)
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#define stderr_debug(args...) do { \
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char buf[128]; \
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snprintf(buf, sizeof(buf), ##args); \
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__sys_write(2, buf, strlen(buf)); \
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} while (0)
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/*
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* Priority queue manipulation macros (using pqe link):
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*/
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#define PTHREAD_PRIOQ_INSERT_HEAD(thrd) _pq_insert_head(&_readyq,thrd)
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#define PTHREAD_PRIOQ_INSERT_TAIL(thrd) _pq_insert_tail(&_readyq,thrd)
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#define PTHREAD_PRIOQ_REMOVE(thrd) _pq_remove(&_readyq,thrd)
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#define PTHREAD_PRIOQ_FIRST() _pq_first(&_readyq)
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/*
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* Waiting queue manipulation macros (using pqe link):
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*/
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#define PTHREAD_WAITQ_REMOVE(thrd) _waitq_remove(thrd)
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#define PTHREAD_WAITQ_INSERT(thrd) _waitq_insert(thrd)
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#if defined(_PTHREADS_INVARIANTS)
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#define PTHREAD_WAITQ_CLEARACTIVE() _waitq_clearactive()
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#define PTHREAD_WAITQ_SETACTIVE() _waitq_setactive()
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#else
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#define PTHREAD_WAITQ_CLEARACTIVE()
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#define PTHREAD_WAITQ_SETACTIVE()
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#endif
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/*
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* Work queue manipulation macros (using qe link):
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*/
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#define PTHREAD_WORKQ_INSERT(thrd) do { \
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TAILQ_INSERT_TAIL(&_workq,thrd,qe); \
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(thrd)->flags |= PTHREAD_FLAGS_IN_WORKQ; \
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} while (0)
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#define PTHREAD_WORKQ_REMOVE(thrd) do { \
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TAILQ_REMOVE(&_workq,thrd,qe); \
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(thrd)->flags &= ~PTHREAD_FLAGS_IN_WORKQ; \
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} while (0)
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/*
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* State change macro without scheduling queue change:
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*/
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#define PTHREAD_SET_STATE(thrd, newstate) do { \
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(thrd)->state = newstate; \
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(thrd)->fname = __FILE__; \
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(thrd)->lineno = __LINE__; \
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} while (0)
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/*
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* State change macro with scheduling queue change - This must be
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* called with preemption deferred (see thread_kern_sched_[un]defer).
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*/
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#if defined(_PTHREADS_INVARIANTS)
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#include <assert.h>
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#define PTHREAD_ASSERT(cond, msg) do { \
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if (!(cond)) \
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PANIC(msg); \
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} while (0)
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#define PTHREAD_ASSERT_NOT_IN_SYNCQ(thrd) \
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PTHREAD_ASSERT((((thrd)->flags & PTHREAD_FLAGS_IN_SYNCQ) == 0), \
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"Illegal call from signal handler");
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#define PTHREAD_NEW_STATE(thrd, newstate) do { \
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if (_thread_kern_new_state != 0) \
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PANIC("Recursive PTHREAD_NEW_STATE"); \
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_thread_kern_new_state = 1; \
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if ((thrd)->state != newstate) { \
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if ((thrd)->state == PS_RUNNING) { \
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PTHREAD_PRIOQ_REMOVE(thrd); \
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PTHREAD_SET_STATE(thrd, newstate); \
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PTHREAD_WAITQ_INSERT(thrd); \
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} else if (newstate == PS_RUNNING) { \
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PTHREAD_WAITQ_REMOVE(thrd); \
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PTHREAD_SET_STATE(thrd, newstate); \
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PTHREAD_PRIOQ_INSERT_TAIL(thrd); \
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} \
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} \
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_thread_kern_new_state = 0; \
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} while (0)
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#else
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#define PTHREAD_ASSERT(cond, msg)
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#define PTHREAD_ASSERT_NOT_IN_SYNCQ(thrd)
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#define PTHREAD_NEW_STATE(thrd, newstate) do { \
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if ((thrd)->state != newstate) { \
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if ((thrd)->state == PS_RUNNING) { \
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PTHREAD_PRIOQ_REMOVE(thrd); \
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PTHREAD_WAITQ_INSERT(thrd); \
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} else if (newstate == PS_RUNNING) { \
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PTHREAD_WAITQ_REMOVE(thrd); \
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PTHREAD_PRIOQ_INSERT_TAIL(thrd); \
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} \
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} \
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PTHREAD_SET_STATE(thrd, newstate); \
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} while (0)
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#endif
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/*
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* Priority queues.
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*
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* XXX It'd be nice if these were contained in uthread_priority_queue.[ch].
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*/
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typedef struct pq_list {
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TAILQ_HEAD(, pthread) pl_head; /* list of threads at this priority */
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TAILQ_ENTRY(pq_list) pl_link; /* link for queue of priority lists */
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int pl_prio; /* the priority of this list */
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int pl_queued; /* is this in the priority queue */
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} pq_list_t;
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typedef struct pq_queue {
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TAILQ_HEAD(, pq_list) pq_queue; /* queue of priority lists */
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pq_list_t *pq_lists; /* array of all priority lists */
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int pq_size; /* number of priority lists */
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} pq_queue_t;
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/*
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* TailQ initialization values.
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*/
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#define TAILQ_INITIALIZER { NULL, NULL }
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/*
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* Mutex definitions.
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*/
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union pthread_mutex_data {
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void *m_ptr;
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int m_count;
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};
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struct pthread_mutex {
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enum pthread_mutextype m_type;
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int m_protocol;
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TAILQ_HEAD(mutex_head, pthread) m_queue;
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struct pthread *m_owner;
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union pthread_mutex_data m_data;
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long m_flags;
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int m_refcount;
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/*
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* Used for priority inheritence and protection.
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*
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* m_prio - For priority inheritence, the highest active
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* priority (threads locking the mutex inherit
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* this priority). For priority protection, the
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* ceiling priority of this mutex.
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* m_saved_prio - mutex owners inherited priority before
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* taking the mutex, restored when the owner
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* unlocks the mutex.
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*/
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int m_prio;
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int m_saved_prio;
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/*
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* Link for list of all mutexes a thread currently owns.
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*/
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TAILQ_ENTRY(pthread_mutex) m_qe;
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/*
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* Lock for accesses to this structure.
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*/
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spinlock_t lock;
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};
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/*
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* Flags for mutexes.
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*/
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#define MUTEX_FLAGS_PRIVATE 0x01
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#define MUTEX_FLAGS_INITED 0x02
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#define MUTEX_FLAGS_BUSY 0x04
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/*
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* Static mutex initialization values.
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*/
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#define PTHREAD_MUTEX_STATIC_INITIALIZER \
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{ PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, TAILQ_INITIALIZER, \
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NULL, { NULL }, MUTEX_FLAGS_PRIVATE, 0, 0, 0, TAILQ_INITIALIZER, \
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_SPINLOCK_INITIALIZER }
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struct pthread_mutex_attr {
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enum pthread_mutextype m_type;
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int m_protocol;
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int m_ceiling;
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long m_flags;
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};
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#define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \
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{ PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE }
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/*
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* Condition variable definitions.
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*/
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enum pthread_cond_type {
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COND_TYPE_FAST,
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COND_TYPE_MAX
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};
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struct pthread_cond {
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enum pthread_cond_type c_type;
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TAILQ_HEAD(cond_head, pthread) c_queue;
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pthread_mutex_t c_mutex;
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void *c_data;
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long c_flags;
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int c_seqno;
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/*
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* Lock for accesses to this structure.
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*/
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spinlock_t lock;
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};
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struct pthread_cond_attr {
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enum pthread_cond_type c_type;
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long c_flags;
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};
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/*
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* Flags for condition variables.
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*/
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#define COND_FLAGS_PRIVATE 0x01
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#define COND_FLAGS_INITED 0x02
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#define COND_FLAGS_BUSY 0x04
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/*
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* Static cond initialization values.
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*/
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#define PTHREAD_COND_STATIC_INITIALIZER \
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{ COND_TYPE_FAST, TAILQ_INITIALIZER, NULL, NULL, \
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0, 0, _SPINLOCK_INITIALIZER }
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/*
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* Semaphore definitions.
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*/
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struct sem {
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#define SEM_MAGIC ((u_int32_t) 0x09fa4012)
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u_int32_t magic;
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pthread_mutex_t lock;
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pthread_cond_t gtzero;
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u_int32_t count;
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u_int32_t nwaiters;
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};
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/*
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* Cleanup definitions.
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*/
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struct pthread_cleanup {
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struct pthread_cleanup *next;
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void (*routine) ();
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void *routine_arg;
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};
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struct pthread_attr {
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int sched_policy;
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int sched_inherit;
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int sched_interval;
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int prio;
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int suspend;
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int flags;
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void *arg_attr;
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void (*cleanup_attr) ();
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void *stackaddr_attr;
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size_t stacksize_attr;
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size_t guardsize_attr;
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};
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/*
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* Thread creation state attributes.
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*/
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#define PTHREAD_CREATE_RUNNING 0
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#define PTHREAD_CREATE_SUSPENDED 1
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/*
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* Miscellaneous definitions.
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*/
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#define PTHREAD_STACK_DEFAULT 65536
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/*
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* Size of default red zone at the end of each stack. In actuality, this "red
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* zone" is merely an unmapped region, except in the case of the initial stack.
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* Since mmap() makes it possible to specify the maximum growth of a MAP_STACK
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* region, an unmapped gap between thread stacks achieves the same effect as
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* explicitly mapped red zones.
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* This is declared and initialized in uthread_init.c.
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*/
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extern int _pthread_guard_default;
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extern int _pthread_page_size;
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/*
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* Maximum size of initial thread's stack. This perhaps deserves to be larger
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* than the stacks of other threads, since many applications are likely to run
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* almost entirely on this stack.
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*/
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#define PTHREAD_STACK_INITIAL 0x100000
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/*
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* Define the different priority ranges. All applications have thread
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* priorities constrained within 0-31. The threads library raises the
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* priority when delivering signals in order to ensure that signal
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* delivery happens (from the POSIX spec) "as soon as possible".
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* In the future, the threads library will also be able to map specific
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* threads into real-time (cooperating) processes or kernel threads.
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* The RT and SIGNAL priorities will be used internally and added to
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* thread base priorities so that the scheduling queue can handle both
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* normal and RT priority threads with and without signal handling.
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*
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* The approach taken is that, within each class, signal delivery
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* always has priority over thread execution.
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*/
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#define PTHREAD_DEFAULT_PRIORITY 15
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#define PTHREAD_MIN_PRIORITY 0
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#define PTHREAD_MAX_PRIORITY 31 /* 0x1F */
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#define PTHREAD_SIGNAL_PRIORITY 32 /* 0x20 */
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#define PTHREAD_RT_PRIORITY 64 /* 0x40 */
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#define PTHREAD_FIRST_PRIORITY PTHREAD_MIN_PRIORITY
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#define PTHREAD_LAST_PRIORITY \
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(PTHREAD_MAX_PRIORITY + PTHREAD_SIGNAL_PRIORITY + PTHREAD_RT_PRIORITY)
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#define PTHREAD_BASE_PRIORITY(prio) ((prio) & PTHREAD_MAX_PRIORITY)
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/*
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* Clock resolution in microseconds.
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*/
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#define CLOCK_RES_USEC 10000
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#define CLOCK_RES_USEC_MIN 1000
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/*
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* Time slice period in microseconds.
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*/
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#define TIMESLICE_USEC 20000
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/*
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* Define a thread-safe macro to get the current time of day
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* which is updated at regular intervals by the scheduling signal
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* handler.
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*/
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#define GET_CURRENT_TOD(tv) \
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do { \
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tv.tv_sec = _sched_tod.tv_sec; \
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tv.tv_usec = _sched_tod.tv_usec; \
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} while (tv.tv_sec != _sched_tod.tv_sec)
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struct pthread_rwlockattr {
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int pshared;
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};
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struct pthread_rwlock {
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pthread_mutex_t lock; /* monitor lock */
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int state; /* 0 = idle >0 = # of readers -1 = writer */
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pthread_cond_t read_signal;
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pthread_cond_t write_signal;
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int blocked_writers;
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};
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/*
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* Thread states.
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*/
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enum pthread_state {
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PS_RUNNING,
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PS_MUTEX_WAIT,
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PS_COND_WAIT,
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PS_SLEEP_WAIT,
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PS_WAIT_WAIT,
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PS_SPINBLOCK,
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PS_JOIN,
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PS_SUSPENDED,
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PS_DEAD,
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PS_DEADLOCK,
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PS_STATE_MAX
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};
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/*
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* File descriptor locking definitions.
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*/
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#define FD_READ 0x1
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#define FD_WRITE 0x2
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#define FD_RDWR (FD_READ | FD_WRITE)
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union pthread_wait_data {
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pthread_mutex_t mutex;
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pthread_cond_t cond;
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spinlock_t *spinlock;
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struct pthread *thread;
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};
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/*
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* Define a continuation routine that can be used to perform a
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* transfer of control:
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*/
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typedef void (*thread_continuation_t) (void *);
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struct join_status {
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struct pthread *thread;
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void *ret;
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int error;
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};
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struct pthread_specific_elem {
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const void *data;
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int seqno;
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};
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/*
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* Thread structure.
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*/
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struct pthread {
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/*
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* Magic value to help recognize a valid thread structure
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* from an invalid one:
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*/
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#define PTHREAD_MAGIC ((u_int32_t) 0xd09ba115)
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u_int32_t magic;
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char *name;
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u_int64_t uniqueid; /* for gdb */
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/*
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* Lock for accesses to this thread structure.
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*/
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spinlock_t lock;
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/* Queue entry for list of all threads: */
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TAILQ_ENTRY(pthread) tle;
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/* Queue entry for list of dead threads: */
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TAILQ_ENTRY(pthread) dle;
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/*
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* Thread start routine, argument, stack pointer and thread
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* attributes.
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*/
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void *(*start_routine)(void *);
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void *arg;
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void *stack;
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struct pthread_attr attr;
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/*
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* Machine context, including signal state.
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*/
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ucontext_t ctx;
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/*
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* Cancelability flags - the lower 2 bits are used by cancel
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* definitions in pthread.h
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*/
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#define PTHREAD_AT_CANCEL_POINT 0x0004
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#define PTHREAD_CANCELLING 0x0008
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#define PTHREAD_CANCEL_NEEDED 0x0010
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int cancelflags;
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thread_continuation_t continuation;
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/* Thread state: */
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enum pthread_state state;
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/* Scheduling clock when this thread was last made active. */
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long last_active;
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/* Scheduling clock when this thread was last made inactive. */
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long last_inactive;
|
|
|
|
/*
|
|
* Number of microseconds accumulated by this thread when
|
|
* time slicing is active.
|
|
*/
|
|
long slice_usec;
|
|
|
|
/*
|
|
* Time to wake up thread. This is used for sleeping threads and
|
|
* for any operation which may time out.
|
|
*/
|
|
struct timespec wakeup_time;
|
|
|
|
/* TRUE if operation has timed out. */
|
|
int timeout;
|
|
|
|
/*
|
|
* Error variable used instead of errno. The function __error()
|
|
* returns a pointer to this.
|
|
*/
|
|
int error;
|
|
|
|
/*
|
|
* The joiner is the thread that is joining to this thread. The
|
|
* join status keeps track of a join operation to another thread.
|
|
*/
|
|
struct pthread *joiner;
|
|
struct join_status join_status;
|
|
|
|
/*
|
|
* The current thread can belong to only one scheduling queue at
|
|
* a time (ready or waiting queue). It can also belong to:
|
|
*
|
|
* o A queue of threads waiting for a mutex
|
|
* o A queue of threads waiting for a condition variable
|
|
* o A queue of threads waiting for a file descriptor lock
|
|
* o A queue of threads needing work done by the kernel thread
|
|
* (waiting for a spinlock or file I/O)
|
|
*
|
|
* A thread can also be joining a thread (the joiner field above).
|
|
*
|
|
* It must not be possible for a thread to belong to any of the
|
|
* above queues while it is handling a signal. Signal handlers
|
|
* may longjmp back to previous stack frames circumventing normal
|
|
* control flow. This could corrupt queue integrity if the thread
|
|
* retains membership in the queue. Therefore, if a thread is a
|
|
* member of one of these queues when a signal handler is invoked,
|
|
* it must remove itself from the queue before calling the signal
|
|
* handler and reinsert itself after normal return of the handler.
|
|
*
|
|
* Use pqe for the scheduling queue link (both ready and waiting),
|
|
* sqe for synchronization (mutex and condition variable) queue
|
|
* links, and qe for all other links.
|
|
*/
|
|
TAILQ_ENTRY(pthread) pqe; /* priority queue link */
|
|
TAILQ_ENTRY(pthread) sqe; /* synchronization queue link */
|
|
TAILQ_ENTRY(pthread) qe; /* all other queues link */
|
|
|
|
/* Wait data. */
|
|
union pthread_wait_data data;
|
|
|
|
/*
|
|
* Set to TRUE if a blocking operation was
|
|
* interrupted by a signal:
|
|
*/
|
|
int interrupted;
|
|
|
|
/*
|
|
* Set to non-zero when this thread has deferred signals.
|
|
* We allow for recursive deferral.
|
|
*/
|
|
int sig_defer_count;
|
|
|
|
/* Miscellaneous flags; only set with signals deferred. */
|
|
int flags;
|
|
#define PTHREAD_FLAGS_PRIVATE 0x0001
|
|
#define PTHREAD_EXITING 0x0002
|
|
#define PTHREAD_FLAGS_IN_WAITQ 0x0004 /* in waiting queue using pqe link */
|
|
#define PTHREAD_FLAGS_IN_PRIOQ 0x0008 /* in priority queue using pqe link */
|
|
#define PTHREAD_FLAGS_IN_WORKQ 0x0010 /* in work queue using qe link */
|
|
#define PTHREAD_FLAGS_IN_FILEQ 0x0020 /* in file lock queue using qe link */
|
|
/* 0x0040 Unused. */
|
|
#define PTHREAD_FLAGS_IN_CONDQ 0x0080 /* in condition queue using sqe link*/
|
|
#define PTHREAD_FLAGS_IN_MUTEXQ 0x0100 /* in mutex queue using sqe link */
|
|
#define PTHREAD_FLAGS_SUSPENDED 0x0200 /* thread is suspended */
|
|
#define PTHREAD_FLAGS_TRACE 0x0400 /* for debugging purposes */
|
|
#define PTHREAD_FLAGS_IN_SYNCQ \
|
|
(PTHREAD_FLAGS_IN_CONDQ | PTHREAD_FLAGS_IN_MUTEXQ)
|
|
|
|
/*
|
|
* Base priority is the user setable and retrievable priority
|
|
* of the thread. It is only affected by explicit calls to
|
|
* set thread priority and upon thread creation via a thread
|
|
* attribute or default priority.
|
|
*/
|
|
char base_priority;
|
|
|
|
/*
|
|
* Inherited priority is the priority a thread inherits by
|
|
* taking a priority inheritence or protection mutex. It
|
|
* is not affected by base priority changes. Inherited
|
|
* priority defaults to and remains 0 until a mutex is taken
|
|
* that is being waited on by any other thread whose priority
|
|
* is non-zero.
|
|
*/
|
|
char inherited_priority;
|
|
|
|
/*
|
|
* Active priority is always the maximum of the threads base
|
|
* priority and inherited priority. When there is a change
|
|
* in either the base or inherited priority, the active
|
|
* priority must be recalculated.
|
|
*/
|
|
char active_priority;
|
|
|
|
/* Number of priority ceiling or protection mutexes owned. */
|
|
int priority_mutex_count;
|
|
|
|
/*
|
|
* Queue of currently owned mutexes.
|
|
*/
|
|
TAILQ_HEAD(, pthread_mutex) mutexq;
|
|
|
|
void *ret;
|
|
struct pthread_specific_elem *specific;
|
|
int specific_data_count;
|
|
|
|
/* Cleanup handlers Link List */
|
|
struct pthread_cleanup *cleanup;
|
|
char *fname; /* Ptr to source file name */
|
|
int lineno; /* Source line number. */
|
|
};
|
|
|
|
/*
|
|
* Global variables for the uthread kernel.
|
|
*/
|
|
|
|
SCLASS void *_usrstack
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= (void *) USRSTACK;
|
|
#else
|
|
;
|
|
#endif
|
|
|
|
/* Kernel thread structure used when there are no running threads: */
|
|
SCLASS struct pthread _thread_kern_thread;
|
|
|
|
/* Ptr to the thread structure for the running thread: */
|
|
SCLASS struct pthread * volatile _thread_run
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= &_thread_kern_thread;
|
|
#else
|
|
;
|
|
#endif
|
|
|
|
/* Ptr to the thread structure for the last user thread to run: */
|
|
SCLASS struct pthread * volatile _last_user_thread
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= &_thread_kern_thread;
|
|
#else
|
|
;
|
|
#endif
|
|
|
|
/* List of all threads: */
|
|
SCLASS TAILQ_HEAD(, pthread) _thread_list
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= TAILQ_HEAD_INITIALIZER(_thread_list);
|
|
#else
|
|
;
|
|
#endif
|
|
|
|
SCLASS int _thread_kern_in_sched
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= 0;
|
|
#else
|
|
;
|
|
#endif
|
|
|
|
/* Time of day at last scheduling timer signal: */
|
|
SCLASS struct timeval volatile _sched_tod
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= { 0, 0 };
|
|
#else
|
|
;
|
|
#endif
|
|
|
|
/*
|
|
* Current scheduling timer ticks; used as resource usage.
|
|
*/
|
|
SCLASS unsigned int volatile _sched_ticks
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= 0;
|
|
#else
|
|
;
|
|
#endif
|
|
|
|
/* Dead threads: */
|
|
SCLASS TAILQ_HEAD(, pthread) _dead_list
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= TAILQ_HEAD_INITIALIZER(_dead_list);
|
|
#else
|
|
;
|
|
#endif
|
|
|
|
/* Initial thread: */
|
|
SCLASS struct pthread *_thread_initial
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= NULL;
|
|
#else
|
|
;
|
|
#endif
|
|
|
|
/* Default thread attributes: */
|
|
SCLASS struct pthread_attr pthread_attr_default
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= { SCHED_RR, 0, TIMESLICE_USEC, PTHREAD_DEFAULT_PRIORITY,
|
|
PTHREAD_CREATE_RUNNING, PTHREAD_CREATE_JOINABLE, NULL, NULL, NULL,
|
|
PTHREAD_STACK_DEFAULT, -1 };
|
|
#else
|
|
;
|
|
#endif
|
|
|
|
/* Default mutex attributes: */
|
|
SCLASS struct pthread_mutex_attr pthread_mutexattr_default
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, 0 };
|
|
#else
|
|
;
|
|
#endif
|
|
|
|
/* Default condition variable attributes: */
|
|
SCLASS struct pthread_cond_attr pthread_condattr_default
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= { COND_TYPE_FAST, 0 };
|
|
#else
|
|
;
|
|
#endif
|
|
|
|
SCLASS int _clock_res_usec /* Clock resolution in usec. */
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= CLOCK_RES_USEC;
|
|
#else
|
|
;
|
|
#endif
|
|
|
|
/* Garbage collector mutex and condition variable. */
|
|
SCLASS pthread_mutex_t _gc_mutex
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= NULL
|
|
#endif
|
|
;
|
|
SCLASS pthread_cond_t _gc_cond
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= NULL
|
|
#endif
|
|
;
|
|
|
|
/*
|
|
* Scheduling queues:
|
|
*/
|
|
SCLASS pq_queue_t _readyq;
|
|
SCLASS TAILQ_HEAD(, pthread) _waitingq;
|
|
|
|
/*
|
|
* Work queue:
|
|
*/
|
|
SCLASS TAILQ_HEAD(, pthread) _workq;
|
|
|
|
/* Tracks the number of threads blocked while waiting for a spinlock. */
|
|
SCLASS volatile int _spinblock_count
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= 0
|
|
#endif
|
|
;
|
|
|
|
/* Thread switch hook. */
|
|
SCLASS pthread_switch_routine_t _sched_switch_hook
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= NULL
|
|
#endif
|
|
;
|
|
|
|
/*
|
|
* Declare the kernel scheduler jump buffer and stack:
|
|
*/
|
|
SCLASS ucontext_t _thread_kern_sched_ctx;
|
|
|
|
SCLASS void * _thread_kern_sched_stack
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= NULL
|
|
#endif
|
|
;
|
|
|
|
|
|
/* Used for _PTHREADS_INVARIANTS checking. */
|
|
SCLASS int _thread_kern_new_state
|
|
#ifdef GLOBAL_PTHREAD_PRIVATE
|
|
= 0
|
|
#endif
|
|
;
|
|
|
|
/* Undefine the storage class specifier: */
|
|
#undef SCLASS
|
|
|
|
/*
|
|
* Function prototype definitions.
|
|
*/
|
|
__BEGIN_DECLS
|
|
char *__ttyname_basic(int);
|
|
char *__ttyname_r_basic(int, char *, size_t);
|
|
char *ttyname_r(int, char *, size_t);
|
|
void _cond_wait_backout(pthread_t);
|
|
int _find_thread(pthread_t);
|
|
struct pthread *_get_curthread(void);
|
|
void _set_curthread(struct pthread *);
|
|
void *_thread_stack_alloc(size_t, size_t);
|
|
void _thread_stack_free(void *, size_t, size_t);
|
|
int _thread_create(pthread_t *,const pthread_attr_t *,void *(*start_routine)(void *),void *,pthread_t);
|
|
int _mutex_cv_lock(pthread_mutex_t *);
|
|
int _mutex_cv_unlock(pthread_mutex_t *);
|
|
void _mutex_lock_backout(pthread_t);
|
|
void _mutex_notify_priochange(pthread_t);
|
|
int _mutex_reinit(pthread_mutex_t *);
|
|
void _mutex_unlock_private(pthread_t);
|
|
int _cond_reinit(pthread_cond_t *);
|
|
int _pq_alloc(struct pq_queue *, int, int);
|
|
int _pq_init(struct pq_queue *);
|
|
void _pq_remove(struct pq_queue *pq, struct pthread *);
|
|
void _pq_insert_head(struct pq_queue *pq, struct pthread *);
|
|
void _pq_insert_tail(struct pq_queue *pq, struct pthread *);
|
|
struct pthread *_pq_first(struct pq_queue *pq);
|
|
void *_pthread_getspecific(pthread_key_t);
|
|
int _pthread_key_create(pthread_key_t *, void (*) (void *));
|
|
int _pthread_key_delete(pthread_key_t);
|
|
int _pthread_mutex_destroy(pthread_mutex_t *);
|
|
int _pthread_mutex_init(pthread_mutex_t *, const pthread_mutexattr_t *);
|
|
int _pthread_mutex_lock(pthread_mutex_t *);
|
|
int _pthread_mutex_trylock(pthread_mutex_t *);
|
|
int _pthread_mutex_unlock(pthread_mutex_t *);
|
|
int _pthread_mutexattr_init(pthread_mutexattr_t *);
|
|
int _pthread_mutexattr_destroy(pthread_mutexattr_t *);
|
|
int _pthread_mutexattr_settype(pthread_mutexattr_t *, int);
|
|
int _pthread_once(pthread_once_t *, void (*) (void));
|
|
pthread_t _pthread_self(void);
|
|
int _pthread_setspecific(pthread_key_t, const void *);
|
|
void _waitq_insert(pthread_t pthread);
|
|
void _waitq_remove(pthread_t pthread);
|
|
#if defined(_PTHREADS_INVARIANTS)
|
|
void _waitq_setactive(void);
|
|
void _waitq_clearactive(void);
|
|
#endif
|
|
void _thread_exit(char *, int, char *);
|
|
void _thread_exit_cleanup(void);
|
|
void *_thread_cleanup(pthread_t);
|
|
void _thread_cleanupspecific(void);
|
|
void _thread_dump_info(void);
|
|
void _thread_init(void);
|
|
void _thread_kern_sched(void);
|
|
void _thread_kern_scheduler(void);
|
|
void _thread_kern_sched_state(enum pthread_state, char *fname, int lineno);
|
|
void _thread_kern_sched_state_unlock(enum pthread_state state,
|
|
spinlock_t *lock, char *fname, int lineno);
|
|
void _thread_kern_set_timeout(const struct timespec *);
|
|
void _thread_kern_sig_defer(void);
|
|
void _thread_kern_sig_undefer(void);
|
|
void _thread_start(void);
|
|
void _thread_seterrno(pthread_t, int);
|
|
pthread_addr_t _thread_gc(pthread_addr_t);
|
|
void _thread_enter_cancellation_point(void);
|
|
void _thread_leave_cancellation_point(void);
|
|
void _thread_cancellation_point(void);
|
|
|
|
|
|
/* #include <sys/aio.h> */
|
|
#ifdef _SYS_AIO_H_
|
|
int __sys_aio_suspend(const struct aiocb * const[], int, const struct timespec *);
|
|
#endif
|
|
|
|
/* #include <sys/event.h> */
|
|
#ifdef _SYS_EVENT_H_
|
|
int __sys_kevent(int, const struct kevent *, int, struct kevent *,
|
|
int, const struct timespec *);
|
|
#endif
|
|
|
|
/* #include <sys/ioctl.h> */
|
|
#ifdef _SYS_IOCTL_H_
|
|
int __sys_ioctl(int, unsigned long, ...);
|
|
#endif
|
|
|
|
/* #include <sys/mman.h> */
|
|
#ifdef _SYS_MMAN_H_
|
|
int __sys_msync(void *, size_t, int);
|
|
#endif
|
|
|
|
/* #include <sys/mount.h> */
|
|
#ifdef _SYS_MOUNT_H_
|
|
int __sys_fstatfs(int, struct statfs *);
|
|
#endif
|
|
|
|
/* #include <sys/socket.h> */
|
|
#ifdef _SYS_SOCKET_H_
|
|
int __sys_accept(int, struct sockaddr *, socklen_t *);
|
|
int __sys_bind(int, const struct sockaddr *, socklen_t);
|
|
int __sys_connect(int, const struct sockaddr *, socklen_t);
|
|
int __sys_getpeername(int, struct sockaddr *, socklen_t *);
|
|
int __sys_getsockname(int, struct sockaddr *, socklen_t *);
|
|
int __sys_getsockopt(int, int, int, void *, socklen_t *);
|
|
int __sys_listen(int, int);
|
|
ssize_t __sys_recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *);
|
|
ssize_t __sys_recvmsg(int, struct msghdr *, int);
|
|
int __sys_sendfile(int, int, off_t, size_t, struct sf_hdtr *, off_t *, int);
|
|
ssize_t __sys_sendmsg(int, const struct msghdr *, int);
|
|
ssize_t __sys_sendto(int, const void *,size_t, int, const struct sockaddr *, socklen_t);
|
|
int __sys_setsockopt(int, int, int, const void *, socklen_t);
|
|
int __sys_shutdown(int, int);
|
|
int __sys_socket(int, int, int);
|
|
int __sys_socketpair(int, int, int, int *);
|
|
#endif
|
|
|
|
/* #include <sys/stat.h> */
|
|
#ifdef _SYS_STAT_H_
|
|
int __sys_fchflags(int, u_long);
|
|
int __sys_fchmod(int, mode_t);
|
|
int __sys_fstat(int, struct stat *);
|
|
#endif
|
|
|
|
/* #include <sys/uio.h> */
|
|
#ifdef _SYS_UIO_H_
|
|
ssize_t __sys_readv(int, const struct iovec *, int);
|
|
ssize_t __sys_writev(int, const struct iovec *, int);
|
|
#endif
|
|
|
|
/* #include <sys/wait.h> */
|
|
#ifdef WNOHANG
|
|
pid_t __sys_wait4(pid_t, int *, int, struct rusage *);
|
|
#endif
|
|
|
|
/* #include <dirent.h> */
|
|
#ifdef _DIRENT_H_
|
|
int __sys_getdirentries(int, char *, int, long *);
|
|
#endif
|
|
|
|
/* #include <fcntl.h> */
|
|
#ifdef _SYS_FCNTL_H_
|
|
int __sys_fcntl(int, int, ...);
|
|
int __sys_flock(int, int);
|
|
int __sys_open(const char *, int, ...);
|
|
#endif
|
|
|
|
/* #include <poll.h> */
|
|
#ifdef _SYS_POLL_H_
|
|
int __sys_poll(struct pollfd *, unsigned, int);
|
|
#endif
|
|
|
|
/* #include <signal.h> */
|
|
#ifdef _SIGNAL_H_
|
|
int __sys_sigaction(int, const struct sigaction *, struct sigaction *);
|
|
int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *);
|
|
int __sys_sigprocmask(int, const sigset_t *, sigset_t *);
|
|
int __sys_sigreturn(ucontext_t *);
|
|
#endif
|
|
|
|
/* #include <unistd.h> */
|
|
#ifdef _UNISTD_H_
|
|
int __sys_close(int);
|
|
int __sys_dup(int);
|
|
int __sys_dup2(int, int);
|
|
int __sys_execve(const char *, char * const *, char * const *);
|
|
void __sys_exit(int);
|
|
int __sys_fchown(int, uid_t, gid_t);
|
|
pid_t __sys_fork(void);
|
|
long __sys_fpathconf(int, int);
|
|
int __sys_fsync(int);
|
|
int __sys_pipe(int *);
|
|
ssize_t __sys_read(int, void *, size_t);
|
|
ssize_t __sys_write(int, const void *, size_t);
|
|
#endif
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* !_THR_PRIVATE_H */
|