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-rw-r--r--lib/libthr/thread/thr_private.h714
1 files changed, 714 insertions, 0 deletions
diff --git a/lib/libthr/thread/thr_private.h b/lib/libthr/thread/thr_private.h
new file mode 100644
index 0000000..eb2632d
--- /dev/null
+++ b/lib/libthr/thread/thr_private.h
@@ -0,0 +1,714 @@
+/*
+ * Copyright (C) 2005 Daniel M. Eischen <deischen@freebsd.org>
+ * Copyright (c) 2005 David Xu <davidxu@freebsd.org>
+ * Copyright (c) 1995-1998 John Birrell <jb@cimlogic.com.au>.
+ *
+ * All rights reserved.
+ *
+ * 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 unmodified, 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _THR_PRIVATE_H
+#define _THR_PRIVATE_H
+
+/*
+ * Include files.
+ */
+#include <sys/types.h>
+#include <sys/time.h>
+#include <sys/cdefs.h>
+#include <sys/queue.h>
+#include <machine/atomic.h>
+#include <errno.h>
+#include <limits.h>
+#include <signal.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <ucontext.h>
+#include <sys/thr.h>
+#include <pthread.h>
+
+#ifndef __hidden
+#define __hidden __attribute__((visibility("hidden")))
+#endif
+
+#include "pthread_md.h"
+#include "thr_umtx.h"
+#include "thread_db.h"
+
+typedef TAILQ_HEAD(pthreadlist, pthread) pthreadlist;
+typedef TAILQ_HEAD(atfork_head, pthread_atfork) atfork_head;
+TAILQ_HEAD(mutex_queue, pthread_mutex);
+
+/* Signal to do cancellation */
+#define SIGCANCEL 32
+
+/*
+ * Kernel fatal error handler macro.
+ */
+#define PANIC(string) _thread_exit(__FILE__,__LINE__,string)
+
+/* Output debug messages like this: */
+#define stdout_debug(args...) _thread_printf(STDOUT_FILENO, ##args)
+#define stderr_debug(args...) _thread_printf(STDOUT_FILENO, ##args)
+
+#ifdef _PTHREADS_INVARIANTS
+#define THR_ASSERT(cond, msg) do { \
+ if (__predict_false(!(cond))) \
+ PANIC(msg); \
+} while (0)
+#else
+#define THR_ASSERT(cond, msg)
+#endif
+
+#ifdef PIC
+# define STATIC_LIB_REQUIRE(name)
+#else
+# define STATIC_LIB_REQUIRE(name) __asm (".globl " #name)
+#endif
+
+#define TIMESPEC_ADD(dst, src, val) \
+ do { \
+ (dst)->tv_sec = (src)->tv_sec + (val)->tv_sec; \
+ (dst)->tv_nsec = (src)->tv_nsec + (val)->tv_nsec; \
+ if ((dst)->tv_nsec >= 1000000000) { \
+ (dst)->tv_sec++; \
+ (dst)->tv_nsec -= 1000000000; \
+ } \
+ } while (0)
+
+#define TIMESPEC_SUB(dst, src, val) \
+ do { \
+ (dst)->tv_sec = (src)->tv_sec - (val)->tv_sec; \
+ (dst)->tv_nsec = (src)->tv_nsec - (val)->tv_nsec; \
+ if ((dst)->tv_nsec < 0) { \
+ (dst)->tv_sec--; \
+ (dst)->tv_nsec += 1000000000; \
+ } \
+ } while (0)
+
+struct pthread_mutex {
+ /*
+ * Lock for accesses to this structure.
+ */
+ struct umutex m_lock;
+ enum pthread_mutextype m_type;
+ struct pthread *m_owner;
+ int m_flags;
+ int m_count;
+ int m_refcount;
+ /*
+ * Link for all mutexes a thread currently owns.
+ */
+ TAILQ_ENTRY(pthread_mutex) m_qe;
+};
+
+/*
+ * Flags for mutexes.
+ */
+#define MUTEX_FLAGS_PRIVATE 0x01
+#define MUTEX_FLAGS_INITED 0x02
+#define MUTEX_FLAGS_BUSY 0x04
+
+struct pthread_mutex_attr {
+ enum pthread_mutextype m_type;
+ int m_protocol;
+ int m_ceiling;
+ int m_flags;
+};
+
+#define PTHREAD_MUTEXATTR_STATIC_INITIALIZER \
+ { PTHREAD_MUTEX_DEFAULT, PTHREAD_PRIO_NONE, 0, MUTEX_FLAGS_PRIVATE }
+
+struct pthread_cond {
+ struct umutex c_lock;
+ struct ucond c_kerncv;
+ int c_pshared;
+ int c_clockid;
+};
+
+struct pthread_cond_attr {
+ int c_pshared;
+ int c_clockid;
+};
+
+struct pthread_barrier {
+ struct umutex b_lock;
+ struct ucond b_cv;
+ volatile int64_t b_cycle;
+ volatile int b_count;
+ volatile int b_waiters;
+};
+
+struct pthread_barrierattr {
+ int pshared;
+};
+
+struct pthread_spinlock {
+ struct umutex s_lock;
+};
+
+/*
+ * Flags for condition variables.
+ */
+#define COND_FLAGS_PRIVATE 0x01
+#define COND_FLAGS_INITED 0x02
+#define COND_FLAGS_BUSY 0x04
+
+/*
+ * Cleanup definitions.
+ */
+struct pthread_cleanup {
+ struct pthread_cleanup *next;
+ void (*routine)(void *args);
+ void *routine_arg;
+ int onstack;
+};
+
+#define THR_CLEANUP_PUSH(td, func, arg) { \
+ struct pthread_cleanup __cup; \
+ \
+ __cup.routine = func; \
+ __cup.routine_arg = arg; \
+ __cup.onstack = 1; \
+ __cup.next = (td)->cleanup; \
+ (td)->cleanup = &__cup;
+
+#define THR_CLEANUP_POP(td, exec) \
+ (td)->cleanup = __cup.next; \
+ if ((exec) != 0) \
+ __cup.routine(__cup.routine_arg); \
+}
+
+struct pthread_atfork {
+ TAILQ_ENTRY(pthread_atfork) qe;
+ void (*prepare)(void);
+ void (*parent)(void);
+ void (*child)(void);
+};
+
+struct pthread_attr {
+ int sched_policy;
+ int sched_inherit;
+ int prio;
+ int suspend;
+#define THR_STACK_USER 0x100 /* 0xFF reserved for <pthread.h> */
+ int flags;
+ void *stackaddr_attr;
+ size_t stacksize_attr;
+ size_t guardsize_attr;
+};
+
+/*
+ * Thread creation state attributes.
+ */
+#define THR_CREATE_RUNNING 0
+#define THR_CREATE_SUSPENDED 1
+
+/*
+ * Miscellaneous definitions.
+ */
+#define THR_STACK_DEFAULT (sizeof(void *) / 4 * 1024 * 1024)
+
+/*
+ * Maximum size of initial thread's stack. This perhaps deserves to be larger
+ * than the stacks of other threads, since many applications are likely to run
+ * almost entirely on this stack.
+ */
+#define THR_STACK_INITIAL (THR_STACK_DEFAULT * 2)
+
+/*
+ * Define priorities returned by kernel.
+ */
+#define THR_MIN_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_min)
+#define THR_MAX_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_max)
+#define THR_DEF_PRIORITY (_thr_priorities[SCHED_OTHER-1].pri_default)
+
+#define THR_MIN_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_min)
+#define THR_MAX_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_max)
+#define THR_DEF_RR_PRIORITY (_thr_priorities[SCHED_RR-1].pri_default)
+
+/* XXX The SCHED_FIFO should have same priority range as SCHED_RR */
+#define THR_MIN_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO_1].pri_min)
+#define THR_MAX_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_max)
+#define THR_DEF_FIFO_PRIORITY (_thr_priorities[SCHED_FIFO-1].pri_default)
+
+struct pthread_prio {
+ int pri_min;
+ int pri_max;
+ int pri_default;
+};
+
+struct pthread_rwlockattr {
+ int pshared;
+};
+
+struct pthread_rwlock {
+ pthread_mutex_t lock; /* monitor lock */
+ pthread_cond_t read_signal;
+ pthread_cond_t write_signal;
+ int state; /* 0 = idle >0 = # of readers -1 = writer */
+ int blocked_writers;
+};
+
+/*
+ * Thread states.
+ */
+enum pthread_state {
+ PS_RUNNING,
+ PS_DEAD
+};
+
+struct pthread_specific_elem {
+ const void *data;
+ int seqno;
+};
+
+struct pthread_key {
+ volatile int allocated;
+ int seqno;
+ void (*destructor)(void *);
+};
+
+/*
+ * lwpid_t is 32bit but kernel thr API exports tid as long type
+ * in very earily date.
+ */
+#define TID(thread) ((uint32_t) ((thread)->tid))
+
+/*
+ * Thread structure.
+ */
+struct pthread {
+ /* Kernel thread id. */
+ long tid;
+#define TID_TERMINATED 1
+
+ /*
+ * Lock for accesses to this thread structure.
+ */
+ struct umutex lock;
+
+ /* Internal condition variable cycle number. */
+ umtx_t cycle;
+
+ /* How many low level locks the thread held. */
+ int locklevel;
+
+ /*
+ * Set to non-zero when this thread has entered a critical
+ * region. We allow for recursive entries into critical regions.
+ */
+ int critical_count;
+
+ /* Signal blocked counter. */
+ int sigblock;
+
+ /* Queue entry for list of all threads. */
+ TAILQ_ENTRY(pthread) tle; /* link for all threads in process */
+
+ /* Queue entry for GC lists. */
+ TAILQ_ENTRY(pthread) gcle;
+
+ /* Hash queue entry. */
+ LIST_ENTRY(pthread) hle;
+
+ /* Threads reference count. */
+ int refcount;
+
+ /*
+ * Thread start routine, argument, stack pointer and thread
+ * attributes.
+ */
+ void *(*start_routine)(void *);
+ void *arg;
+ struct pthread_attr attr;
+
+#define SHOULD_CANCEL(thr) \
+ ((thr)->cancel_pending && \
+ ((thr)->cancel_point || (thr)->cancel_async) && \
+ (thr)->cancel_enable && (thr)->cancelling == 0)
+
+ /* Cancellation is enabled */
+ int cancel_enable;
+
+ /* Cancellation request is pending */
+ int cancel_pending;
+
+ /* Thread is at cancellation point */
+ int cancel_point;
+
+ /* Cancellation should be synchoronized */
+ int cancel_defer;
+
+ /* Asynchronouse cancellation is enabled */
+ int cancel_async;
+
+ /* Cancellation is in progress */
+ int cancelling;
+
+ /* Thread temporary signal mask. */
+ sigset_t sigmask;
+
+ /* Thread state: */
+ enum pthread_state state;
+
+ /*
+ * 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;
+
+ /* Miscellaneous flags; only set with scheduling lock held. */
+ int flags;
+#define THR_FLAGS_PRIVATE 0x0001
+#define THR_FLAGS_NEED_SUSPEND 0x0002 /* thread should be suspended */
+#define THR_FLAGS_SUSPENDED 0x0004 /* thread is suspended */
+
+ /* Thread list flags; only set with thread list lock held. */
+ int tlflags;
+#define TLFLAGS_GC_SAFE 0x0001 /* thread safe for cleaning */
+#define TLFLAGS_IN_TDLIST 0x0002 /* thread in all thread list */
+#define TLFLAGS_IN_GCLIST 0x0004 /* thread in gc list */
+#define TLFLAGS_DETACHED 0x0008 /* thread is detached */
+
+ /* Queue of currently owned NORMAL or PRIO_INHERIT type mutexes. */
+ struct mutex_queue mutexq;
+
+ /* Queue of all owned PRIO_PROTECT mutexes. */
+ struct mutex_queue pp_mutexq;
+
+ void *ret;
+ struct pthread_specific_elem *specific;
+ int specific_data_count;
+
+ /* Number rwlocks rdlocks held. */
+ int rdlock_count;
+
+ /*
+ * Current locks bitmap for rtld. */
+ int rtld_bits;
+
+ /* Thread control block */
+ struct tcb *tcb;
+
+ /* Cleanup handlers Link List */
+ struct pthread_cleanup *cleanup;
+
+ /*
+ * Magic value to help recognize a valid thread structure
+ * from an invalid one:
+ */
+#define THR_MAGIC ((u_int32_t) 0xd09ba115)
+ u_int32_t magic;
+
+ /* Enable event reporting */
+ int report_events;
+
+ /* Event mask */
+ int event_mask;
+
+ /* Event */
+ td_event_msg_t event_buf;
+};
+
+#define THR_IN_CRITICAL(thrd) \
+ (((thrd)->locklevel > 0) || \
+ ((thrd)->critical_count > 0))
+
+#define THR_CRITICAL_ENTER(thrd) \
+ (thrd)->critical_count++
+
+#define THR_CRITICAL_LEAVE(thrd) \
+ (thrd)->critical_count--; \
+ _thr_ast(thrd);
+
+#define THR_UMUTEX_TRYLOCK(thrd, lck) \
+ _thr_umutex_trylock((lck), TID(thrd))
+
+#define THR_UMUTEX_LOCK(thrd, lck) \
+ _thr_umutex_lock((lck), TID(thrd))
+
+#define THR_UMUTEX_TIMEDLOCK(thrd, lck, timo) \
+ _thr_umutex_timedlock((lck), TID(thrd), (timo))
+
+#define THR_UMUTEX_UNLOCK(thrd, lck) \
+ _thr_umutex_unlock((lck), TID(thrd))
+
+#define THR_LOCK_ACQUIRE(thrd, lck) \
+do { \
+ (thrd)->locklevel++; \
+ _thr_umutex_lock(lck, TID(thrd)); \
+} while (0)
+
+#ifdef _PTHREADS_INVARIANTS
+#define THR_ASSERT_LOCKLEVEL(thrd) \
+do { \
+ if (__predict_false((thrd)->locklevel <= 0)) \
+ _thr_assert_lock_level(); \
+} while (0)
+#else
+#define THR_ASSERT_LOCKLEVEL(thrd)
+#endif
+
+#define THR_LOCK_RELEASE(thrd, lck) \
+do { \
+ THR_ASSERT_LOCKLEVEL(thrd); \
+ _thr_umutex_unlock((lck), TID(thrd)); \
+ (thrd)->locklevel--; \
+ _thr_ast(thrd); \
+} while (0)
+
+#define THR_LOCK(curthrd) THR_LOCK_ACQUIRE(curthrd, &(curthrd)->lock)
+#define THR_UNLOCK(curthrd) THR_LOCK_RELEASE(curthrd, &(curthrd)->lock)
+#define THR_THREAD_LOCK(curthrd, thr) THR_LOCK_ACQUIRE(curthrd, &(thr)->lock)
+#define THR_THREAD_UNLOCK(curthrd, thr) THR_LOCK_RELEASE(curthrd, &(thr)->lock)
+
+#define THREAD_LIST_LOCK(curthrd) \
+do { \
+ THR_LOCK_ACQUIRE((curthrd), &_thr_list_lock); \
+} while (0)
+
+#define THREAD_LIST_UNLOCK(curthrd) \
+do { \
+ THR_LOCK_RELEASE((curthrd), &_thr_list_lock); \
+} while (0)
+
+/*
+ * Macros to insert/remove threads to the all thread list and
+ * the gc list.
+ */
+#define THR_LIST_ADD(thrd) do { \
+ if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) == 0) { \
+ TAILQ_INSERT_HEAD(&_thread_list, thrd, tle); \
+ _thr_hash_add(thrd); \
+ (thrd)->tlflags |= TLFLAGS_IN_TDLIST; \
+ } \
+} while (0)
+#define THR_LIST_REMOVE(thrd) do { \
+ if (((thrd)->tlflags & TLFLAGS_IN_TDLIST) != 0) { \
+ TAILQ_REMOVE(&_thread_list, thrd, tle); \
+ _thr_hash_remove(thrd); \
+ (thrd)->tlflags &= ~TLFLAGS_IN_TDLIST; \
+ } \
+} while (0)
+#define THR_GCLIST_ADD(thrd) do { \
+ if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) == 0) { \
+ TAILQ_INSERT_HEAD(&_thread_gc_list, thrd, gcle);\
+ (thrd)->tlflags |= TLFLAGS_IN_GCLIST; \
+ _gc_count++; \
+ } \
+} while (0)
+#define THR_GCLIST_REMOVE(thrd) do { \
+ if (((thrd)->tlflags & TLFLAGS_IN_GCLIST) != 0) { \
+ TAILQ_REMOVE(&_thread_gc_list, thrd, gcle); \
+ (thrd)->tlflags &= ~TLFLAGS_IN_GCLIST; \
+ _gc_count--; \
+ } \
+} while (0)
+
+#define GC_NEEDED() (_gc_count >= 5)
+
+#define SHOULD_REPORT_EVENT(curthr, e) \
+ (curthr->report_events && \
+ (((curthr)->event_mask | _thread_event_mask ) & e) != 0)
+
+extern int __isthreaded;
+
+/*
+ * Global variables for the pthread kernel.
+ */
+
+extern char *_usrstack __hidden;
+extern struct pthread *_thr_initial __hidden;
+
+/* For debugger */
+extern int _libthr_debug;
+extern int _thread_event_mask;
+extern struct pthread *_thread_last_event;
+
+/* List of all threads: */
+extern pthreadlist _thread_list;
+
+/* List of threads needing GC: */
+extern pthreadlist _thread_gc_list __hidden;
+
+extern int _thread_active_threads;
+extern atfork_head _thr_atfork_list __hidden;
+extern struct umutex _thr_atfork_lock __hidden;
+
+/* Default thread attributes: */
+extern struct pthread_attr _pthread_attr_default __hidden;
+
+/* Default mutex attributes: */
+extern struct pthread_mutex_attr _pthread_mutexattr_default __hidden;
+
+/* Default condition variable attributes: */
+extern struct pthread_cond_attr _pthread_condattr_default __hidden;
+
+extern struct pthread_prio _thr_priorities[] __hidden;
+
+extern pid_t _thr_pid __hidden;
+extern int _thr_is_smp __hidden;
+
+extern size_t _thr_guard_default __hidden;
+extern size_t _thr_stack_default __hidden;
+extern size_t _thr_stack_initial __hidden;
+extern int _thr_page_size __hidden;
+extern int _thr_adaptive_spin __hidden;
+/* Garbage thread count. */
+extern int _gc_count __hidden;
+
+extern struct umutex _mutex_static_lock __hidden;
+extern struct umutex _cond_static_lock __hidden;
+extern struct umutex _rwlock_static_lock __hidden;
+extern struct umutex _keytable_lock __hidden;
+extern struct umutex _thr_list_lock __hidden;
+extern struct umutex _thr_event_lock __hidden;
+
+/*
+ * Function prototype definitions.
+ */
+__BEGIN_DECLS
+int _thr_setthreaded(int) __hidden;
+int _mutex_cv_lock(pthread_mutex_t *, int count) __hidden;
+int _mutex_cv_unlock(pthread_mutex_t *, int *count) __hidden;
+int _mutex_reinit(pthread_mutex_t *) __hidden;
+void _mutex_fork(struct pthread *curthread) __hidden;
+void _mutex_unlock_private(struct pthread *) __hidden;
+void _libpthread_init(struct pthread *) __hidden;
+struct pthread *_thr_alloc(struct pthread *) __hidden;
+void _thread_exit(const char *, int, const char *) __hidden __dead2;
+void _thr_exit_cleanup(void) __hidden;
+int _thr_ref_add(struct pthread *, struct pthread *, int) __hidden;
+void _thr_ref_delete(struct pthread *, struct pthread *) __hidden;
+void _thr_ref_delete_unlocked(struct pthread *, struct pthread *) __hidden;
+int _thr_find_thread(struct pthread *, struct pthread *, int) __hidden;
+void _thr_rtld_init(void) __hidden;
+void _thr_rtld_fini(void) __hidden;
+int _thr_stack_alloc(struct pthread_attr *) __hidden;
+void _thr_stack_free(struct pthread_attr *) __hidden;
+void _thr_free(struct pthread *, struct pthread *) __hidden;
+void _thr_gc(struct pthread *) __hidden;
+void _thread_cleanupspecific(void) __hidden;
+void _thread_dump_info(void) __hidden;
+void _thread_printf(int, const char *, ...) __hidden;
+void _thr_spinlock_init(void) __hidden;
+void _thr_cancel_enter(struct pthread *) __hidden;
+void _thr_cancel_leave(struct pthread *) __hidden;
+void _thr_cancel_enter_defer(struct pthread *) __hidden;
+void _thr_cancel_leave_defer(struct pthread *, int) __hidden;
+void _thr_testcancel(struct pthread *) __hidden;
+void _thr_signal_block(struct pthread *) __hidden;
+void _thr_signal_unblock(struct pthread *) __hidden;
+void _thr_signal_init(void) __hidden;
+void _thr_signal_deinit(void) __hidden;
+int _thr_send_sig(struct pthread *, int sig) __hidden;
+void _thr_list_init(void) __hidden;
+void _thr_hash_add(struct pthread *) __hidden;
+void _thr_hash_remove(struct pthread *) __hidden;
+struct pthread *_thr_hash_find(struct pthread *) __hidden;
+void _thr_link(struct pthread *, struct pthread *) __hidden;
+void _thr_unlink(struct pthread *, struct pthread *) __hidden;
+void _thr_suspend_check(struct pthread *) __hidden;
+void _thr_assert_lock_level(void) __hidden __dead2;
+void _thr_ast(struct pthread *) __hidden;
+void _thr_once_init(void) __hidden;
+void _thr_report_creation(struct pthread *curthread,
+ struct pthread *newthread) __hidden;
+void _thr_report_death(struct pthread *curthread) __hidden;
+int _thr_getscheduler(lwpid_t, int *, struct sched_param *) __hidden;
+int _thr_setscheduler(lwpid_t, int, const struct sched_param *) __hidden;
+int _rtp_to_schedparam(const struct rtprio *rtp, int *policy,
+ struct sched_param *param) __hidden;
+int _schedparam_to_rtp(int policy, const struct sched_param *param,
+ struct rtprio *rtp) __hidden;
+void _thread_bp_create(void);
+void _thread_bp_death(void);
+
+/* #include <fcntl.h> */
+#ifdef _SYS_FCNTL_H_
+int __sys_fcntl(int, int, ...);
+int __sys_open(const char *, int, ...);
+#endif
+
+/* #include <signal.h> */
+#ifdef _SIGNAL_H_
+int __sys_kill(pid_t, int);
+int __sys_sigaction(int, const struct sigaction *, struct sigaction *);
+int __sys_sigpending(sigset_t *);
+int __sys_sigprocmask(int, const sigset_t *, sigset_t *);
+int __sys_sigsuspend(const sigset_t *);
+int __sys_sigreturn(ucontext_t *);
+int __sys_sigaltstack(const struct sigaltstack *, struct sigaltstack *);
+int __sys_sigwait(const sigset_t *, int *);
+int __sys_sigtimedwait(const sigset_t *, siginfo_t *,
+ const struct timespec *);
+int __sys_sigwaitinfo(const sigset_t *set, siginfo_t *info);
+#endif
+
+/* #include <time.h> */
+#ifdef _TIME_H_
+int __sys_nanosleep(const struct timespec *, struct timespec *);
+#endif
+
+/* #include <unistd.h> */
+#ifdef _UNISTD_H_
+int __sys_close(int);
+int __sys_fork(void);
+pid_t __sys_getpid(void);
+ssize_t __sys_read(int, void *, size_t);
+ssize_t __sys_write(int, const void *, size_t);
+void __sys_exit(int);
+#endif
+
+static inline int
+_thr_isthreaded(void)
+{
+ return (__isthreaded != 0);
+}
+
+static inline int
+_thr_is_inited(void)
+{
+ return (_thr_initial != NULL);
+}
+
+static inline void
+_thr_check_init(void)
+{
+ if (_thr_initial == NULL)
+ _libpthread_init(NULL);
+}
+
+__END_DECLS
+
+#endif /* !_THR_PRIVATE_H */
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