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authorthorpej <thorpej@NetBSD.org>2003-01-18 10:32:11 +0000
committerthorpej <thorpej@NetBSD.org>2003-01-18 10:32:11 +0000
commitc62a74e6d5cfb2fb5034e98b983da7e2fc87709d (patch)
treef1281fd7111ddb57951e4472b342b53a2f56244a /lib/libpthread/pthread_int.h
parentaf919042eceb8c19f42acd688efa8cf58168af5d (diff)
Merge the nathanw_sa branch.
Diffstat (limited to 'lib/libpthread/pthread_int.h')
-rw-r--r--lib/libpthread/pthread_int.h349
1 files changed, 349 insertions, 0 deletions
diff --git a/lib/libpthread/pthread_int.h b/lib/libpthread/pthread_int.h
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+/* $NetBSD: pthread_int.h,v 1.2 2003/01/18 10:34:15 thorpej Exp $ */
+
+/*-
+ * Copyright (c) 2001 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Nathan J. Williams.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the NetBSD
+ * Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _LIB_PTHREAD_INT_H
+#define _LIB_PTHREAD_INT_H
+
+#define PTHREAD__DEBUG
+#define ERRORCHECK
+
+#include "pthread_types.h"
+#include "pthread_queue.h"
+#include "pthread_debug.h"
+#include "pthread_md.h"
+
+#include <sa.h>
+#include <signal.h>
+
+/*
+ * The size of this structure needs to be no larger than struct
+ * __pthread_cleanup_store, defined in pthread.h.
+ */
+struct pt_clean_t {
+ PTQ_ENTRY(pt_clean_t) ptc_next;
+ void (*ptc_cleanup)(void *);
+ void *ptc_arg;
+};
+
+struct pt_alarm_t {
+ PTQ_ENTRY(pt_alarm_t) pta_next;
+ pthread_spin_t pta_lock;
+ const struct timespec *pta_time;
+ void (*pta_func)(void *);
+ void *pta_arg;
+ int pta_fired;
+};
+
+struct pthread_st {
+ unsigned int pt_magic;
+
+ int pt_type; /* normal, upcall, or idle */
+ int pt_state; /* running, blocked, etc. */
+ pthread_spin_t pt_statelock; /* lock on pt_state */
+ int pt_flags; /* see PT_FLAG_* below */
+ int pt_cancel; /* Deferred cancellation */
+ int pt_spinlocks; /* Number of spinlocks held. */
+ int pt_blockedlwp; /* LWP/SA number when blocked */
+
+ int pt_errno; /* Thread-specific errno. */
+
+ /* Entry on the run queue */
+ PTQ_ENTRY(pthread_st) pt_runq;
+ /* Entry on the list of all threads */
+ PTQ_ENTRY(pthread_st) pt_allq;
+ /* Entry on the sleep queue (xxx should be same as run queue?) */
+ PTQ_ENTRY(pthread_st) pt_sleep;
+ /* Object we're sleeping on */
+ void *pt_sleepobj;
+ /* Queue we're sleeping on */
+ struct pthread_queue_t *pt_sleepq;
+ /* Lock protecting that queue */
+ pthread_spin_t *pt_sleeplock;
+
+ stack_t pt_stack; /* Our stack */
+ ucontext_t *pt_uc; /* Saved context when we're stopped */
+
+ sigset_t pt_sigmask; /* Signals we won't take. */
+ sigset_t pt_siglist; /* Signals pending for us. */
+ pthread_spin_t pt_siglock; /* Lock on above */
+
+ void * pt_exitval; /* Read by pthread_join() */
+
+ /* Stack of cancellation cleanup handlers and their arguments */
+ PTQ_HEAD(, pt_clean_t) pt_cleanup_stack;
+
+ /* Other threads trying to pthread_join() us. */
+ struct pthread_queue_t pt_joiners;
+ /* Lock for above, and for changing pt_state to ZOMBIE or DEAD,
+ * and for setting the DETACHED flag
+ */
+ pthread_spin_t pt_join_lock;
+
+ /* Thread we were going to switch to before we were preempted
+ * ourselves. Will be used by the upcall that's continuing us.
+ */
+ pthread_t pt_switchto;
+ ucontext_t* pt_switchtouc;
+
+ /* The context we saved in pthread__locked_switch but which
+ * was trashed when we were preempted before switching stacks.
+ */
+ ucontext_t* pt_sleepuc;
+
+ /* Threads that are preempted with spinlocks held will be
+ * continued until they unlock their spinlock. When they do
+ * so, they should jump ship to the thread pointed to by
+ * pt_next.
+ */
+ pthread_t pt_next;
+
+ /* The upcall that is continuing this thread */
+ pthread_t pt_parent;
+
+ /* A queue lock that this thread held while trying to
+ * context switch to another process.
+ */
+ pthread_spin_t* pt_heldlock;
+
+ /* Identifier, for debugging. */
+ int pt_num;
+
+ /* Thread-specific data */
+ void* pt_specific[PTHREAD_KEYS_MAX];
+
+#ifdef PTHREAD__DEBUG
+ int blocks;
+ int preempts;
+ int rescheds;
+#endif
+};
+
+struct pthread_lock_ops {
+ void (*plo_init)(__cpu_simple_lock_t *);
+ int (*plo_try)(__cpu_simple_lock_t *);
+ void (*plo_unlock)(__cpu_simple_lock_t *);
+};
+
+/* Thread types */
+#define PT_THREAD_NORMAL 1
+#define PT_THREAD_UPCALL 2
+#define PT_THREAD_IDLE 3
+
+/* Thread states */
+#define PT_STATE_RUNNING 1
+#define PT_STATE_RUNNABLE 2
+#define PT_STATE_BLOCKED_SYS 3
+#define PT_STATE_BLOCKED_QUEUE 4
+#define PT_STATE_ZOMBIE 5
+#define PT_STATE_DEAD 6
+#define PT_STATE_RECYCLABLE 7
+
+/* Flag values */
+
+#define PT_FLAG_DETACHED 0x0001
+#define PT_FLAG_IDLED 0x0002
+#define PT_FLAG_CS_DISABLED 0x0004 /* Cancellation disabled */
+#define PT_FLAG_CS_ASYNC 0x0008 /* Cancellation is async */
+#define PT_FLAG_CS_PENDING 0x0010
+#define PT_FLAG_SIGCATCH 0x0020 /* Interrupt sleep on a signal */
+
+#define PT_MAGIC 0x11110001
+#define PT_DEAD 0xDEAD0001
+
+#define PT_ATTR_MAGIC 0x22220002
+#define PT_ATTR_DEAD 0xDEAD0002
+
+#define PT_STACKSIZE (1<<18)
+#define PT_STACKMASK (PT_STACKSIZE-1)
+
+#define PT_UPCALLSTACKS 16
+
+#define PT_ALARMTIMER_MAGIC 0x88880010
+#define PT_RRTIMER_MAGIC 0x88880020
+#define NIDLETHREADS 4
+#define IDLESPINS 1000
+
+/* Flag to be used in a ucontext_t's uc_flags indicating that
+ * the saved register state is "user" state only, not full
+ * trap state.
+ */
+#define _UC_USER_BIT 30
+#define _UC_USER (1LU << _UC_USER_BIT)
+
+void pthread_init(void) __attribute__ ((__constructor__));
+
+/* Utility functions */
+
+/* Set up/clean up a thread's basic state. */
+void pthread__initthread(pthread_t self, pthread_t t);
+
+/* Go do something else. Don't go back on the run queue */
+void pthread__block(pthread_t self, pthread_spin_t* queuelock);
+/* Put a thread back on the run queue */
+void pthread__sched(pthread_t self, pthread_t thread);
+void pthread__sched_idle(pthread_t self, pthread_t thread);
+void pthread__sched_idle2(pthread_t self);
+
+void pthread__sched_bulk(pthread_t self, pthread_t qhead);
+
+void pthread__idle(void);
+
+/* Get the next thread */
+pthread_t pthread__next(pthread_t self);
+
+int pthread__stackalloc(pthread_t *t);
+void pthread__initmain(pthread_t *t);
+
+void pthread__sa_start(void);
+void pthread__sa_recycle(pthread_t old, pthread_t new);
+
+/* Alarm code */
+void pthread__alarm_init(void);
+void pthread__alarm_add(pthread_t, struct pt_alarm_t *,
+ const struct timespec *, void (*)(void *), void *);
+void pthread__alarm_del(pthread_t, struct pt_alarm_t *);
+int pthread__alarm_fired(struct pt_alarm_t *);
+void pthread__alarm_process(pthread_t self, void *arg);
+
+/* Internal locking primitives */
+void pthread__lockprim_init(void);
+void pthread_lockinit(pthread_spin_t *lock);
+void pthread_spinlock(pthread_t thread, pthread_spin_t *lock);
+int pthread_spintrylock(pthread_t thread, pthread_spin_t *lock);
+void pthread_spinunlock(pthread_t thread, pthread_spin_t *lock);
+
+extern const struct pthread_lock_ops *pthread__lock_ops;
+
+#define pthread__simple_lock_init(alp) (*pthread__lock_ops->plo_init)(alp)
+#define pthread__simple_lock_try(alp) (*pthread__lock_ops->plo_try)(alp)
+#define pthread__simple_unlock(alp) (*pthread__lock_ops->plo_unlock)(alp)
+
+#ifndef _getcontext_u
+int _getcontext_u(ucontext_t *);
+#endif
+#ifndef _setcontext_u
+int _setcontext_u(const ucontext_t *);
+#endif
+#ifndef _swapcontext_u
+int _swapcontext_u(ucontext_t *, const ucontext_t *);
+#endif
+
+void pthread__testcancel(pthread_t self);
+int pthread__find(pthread_t self, pthread_t target);
+
+#ifndef PTHREAD_MD_INIT
+#define PTHREAD_MD_INIT
+#endif
+
+#ifndef _INITCONTEXT_U_MD
+#define _INITCONTEXT_U_MD(ucp)
+#endif
+
+#define _INITCONTEXT_U(ucp) do { \
+ (ucp)->uc_flags = _UC_CPU | _UC_STACK; \
+ _INITCONTEXT_U_MD(ucp) \
+ } while (0)
+
+#ifdef __PTHREAD_SIGNAL_PRIVATE
+
+/*
+ * Macros for converting from ucontext to sigcontext and vice-versa.
+ * Note that going from sigcontext->ucontext is only safe for a
+ * sigcontext that was first created from a ucontext.
+ *
+ * Arch-specific code can override this, if necessary. It may also
+ * be necessary for arch-specific code to include extra info along with
+ * the sigcontext.
+ */
+#ifndef PTHREAD_SIGCONTEXT_EXTRA
+#define PTHREAD_SIGCONTEXT_EXTRA
+#endif
+
+struct pthread__sigcontext {
+ struct sigcontext psc_context;
+ PTHREAD_SIGCONTEXT_EXTRA
+};
+
+#ifndef PTHREAD_UCONTEXT_TO_SIGCONTEXT
+#define PTHREAD_UCONTEXT_TO_SIGCONTEXT(mask, uc, psc) \
+do { \
+ (uc)->uc_sigmask = *(mask); \
+ /* \
+ * XXX We may want to check for _UC_USER here and do a \
+ * XXX _INITCONTEXT_U_MD() and clearing _UC_USER on such \
+ * XXX contexts before converting to a signcontext, thus \
+ * XXX allowing signal handlers to modify the non-_UC_USER \
+ * XXX registers. Hazy territory; ignore it for now. \
+ */ \
+ _UCONTEXT_TO_SIGCONTEXT((uc), &(psc)->psc_context); \
+} while (/*CONSTCOND*/0)
+
+#define PTHREAD_SIGCONTEXT_TO_UCONTEXT(psc, uc) \
+do { \
+ _SIGCONTEXT_TO_UCONTEXT(&(psc)->psc_context, (uc)); \
+ (uc)->uc_flags &= ~_UC_SIGMASK; \
+} while (/*CONSTCOND*/0)
+#else
+void pthread__ucontext_to_sigcontext(const sigset_t *, ucontext_t *,
+ struct pthread__sigcontext *);
+void pthread__sigcontext_to_ucontext(const struct pthread__sigcontext *,
+ ucontext_t *);
+#endif /* PTHREAD_UCONTEXT_TO_SIGCONTEXT */
+
+#endif /* __PTHREAD_SIGNAL_PRIVATE */
+
+/* Stack location of pointer to a particular thread */
+#define pthread__id(sp) \
+ ((pthread_t) (((vaddr_t)(sp)) & ~PT_STACKMASK))
+
+#define pthread__self() (pthread__id(pthread__sp()))
+
+/* These three routines are defined in processor-specific code. */
+void pthread__upcall_switch(pthread_t self, pthread_t next);
+void pthread__switch(pthread_t self, pthread_t next);
+void pthread__locked_switch(pthread_t self, pthread_t next,
+ pthread_spin_t *lock);
+
+void pthread__signal_init(void);
+
+void pthread__signal(pthread_t t, int sig, int code);
+
+void pthread__destroy_tsd(pthread_t self);
+
+
+#endif /* _LIB_PTHREAD_INT_H */