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+/*
+ * Copyright (c) 2019 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#ifndef __LIBPTHREAD_EXPORTS_INTERNAL_H__
+#define __LIBPTHREAD_EXPORTS_INTERNAL_H__
+
+/*!
+ * @file exports_internal.h
+ *
+ * @brief
+ * This file has prototypes for symbols / functions that are exported
+ * without a public header.
+ *
+ * @discussion
+ * This header is also fed to TAPI and needs to work without internal.h
+ */
+
+#include <os/base.h>
+#include <mach/mach.h>
+#include <pthread.h>
+
+struct ProgramVars;
+
+OS_EXPORT int __is_threaded;
+
+OS_EXPORT const int __unix_conforming;
+
+OS_EXPORT
+void
+_pthread_set_self(pthread_t);
+
+OS_EXPORT
+pthread_t
+_pthread_self(void);
+
+OS_EXPORT
+int
+__pthread_init(const struct _libpthread_functions *pthread_funcs,
+		const char *envp[], const char *apple[],
+		const struct ProgramVars *vars);
+
+OS_EXPORT OS_NORETURN
+void
+thread_start(pthread_t self, mach_port_t kport,
+		void *(*fun)(void *), void *arg,
+		size_t stacksize, unsigned int flags); // trampoline into _pthread_start
+
+OS_EXPORT OS_NORETURN
+void
+_pthread_start(pthread_t thread, mach_port_t kport,
+		void *(*fun)(void *), void *arg,
+		size_t stacksize, unsigned int flags);
+
+OS_EXPORT OS_NORETURN
+void
+start_wqthread(pthread_t self, mach_port_t kport,
+		void *stackaddr, void *unused, int reuse); // trampoline into _start_wqthread
+
+OS_EXPORT
+void
+_pthread_wqthread(pthread_t self, mach_port_t kport,
+		void *stackaddr, void *keventlist, int flags, int nkevents);
+
+#if defined(__x86_64__) || defined(__i386__) || defined(__arm64__)
+OS_EXPORT
+void
+___chkstk_darwin(void);
+
+OS_EXPORT
+void
+thread_chkstk_darwin(void);
+#endif //  defined(__x86_64__) || defined(__i386__) || defined(__arm64__)
+
+#pragma mark - exports with prototypes from not in libpthread
+
+OS_EXPORT
+int
+sigwait(const sigset_t *, int *) __DARWIN_ALIAS_C(sigwait);
+
+#pragma mark - shared with libsystem_kernel.dylib
+/* Note: these can't use _pthread_malloc / _pthread_free unconditionally */
+
+OS_EXPORT
+void
+_pthread_clear_qos_tsd(mach_port_t kport);
+
+OS_EXPORT
+void
+_pthread_exit_if_canceled(int error);
+
+#pragma mark - atfork libSystem integration
+
+OS_EXPORT void _pthread_atfork_prepare_handlers(void);
+OS_EXPORT void _pthread_atfork_prepare(void);
+OS_EXPORT void _pthread_atfork_parent(void);
+OS_EXPORT void _pthread_atfork_parent_handlers(void);
+OS_EXPORT void _pthread_atfork_child(void);
+OS_EXPORT void _pthread_atfork_child_handlers(void);
+OS_EXPORT void _pthread_fork_prepare(void);
+OS_EXPORT void _pthread_fork_parent(void);
+OS_EXPORT void _pthread_fork_child(void);
+OS_EXPORT void _pthread_fork_child_postinit(void);
+
+#pragma mark - TAPI
+#ifdef __clang_tapi__
+
+#define declare_symbol(s) OS_EXPORT void __tapi_##s(void) asm("_" #s)
+
+#if TARGET_OS_OSX && defined(__i386__)
+// TAPI will see the $UNIX2003 redirected symbols
+declare_symbol(pthread_cancel);
+declare_symbol(pthread_cond_init);
+declare_symbol(pthread_cond_timedwait);
+declare_symbol(pthread_cond_wait);
+declare_symbol(pthread_join);
+declare_symbol(pthread_mutexattr_destroy);
+declare_symbol(pthread_rwlock_destroy);
+declare_symbol(pthread_rwlock_init);
+declare_symbol(pthread_rwlock_rdlock);
+declare_symbol(pthread_rwlock_tryrdlock);
+declare_symbol(pthread_rwlock_trywrlock);
+declare_symbol(pthread_rwlock_unlock);
+declare_symbol(pthread_rwlock_wrlock);
+declare_symbol(pthread_setcancelstate);
+declare_symbol(pthread_setcanceltype);
+declare_symbol(pthread_sigmask);
+declare_symbol(pthread_testcancel);
+declare_symbol(sigwait);
+// TAPI will see the $NOCANCEL$UNIX2003 redirected symbols
+declare_symbol(pthread_cond_timedwait$UNIX2003);
+declare_symbol(pthread_cond_wait$UNIX2003);
+declare_symbol(pthread_join$UNIX2003);
+declare_symbol(sigwait$UNIX2003);
+#else
+// TAPI will see the $NOCANCEL redirected symbols
+declare_symbol(pthread_cond_timedwait);
+declare_symbol(pthread_cond_wait);
+declare_symbol(pthread_join);
+declare_symbol(sigwait);
+#endif
+
+#undef declare_symbol
+
+#endif // __clang_tapi__
+#endif // __LIBPTHREAD_EXPORTS_INTERNAL_H__