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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_IMPORTS_INTERNAL_H__
+#define __LIBPTHREAD_IMPORTS_INTERNAL_H__
+
+/*!
+ * @file imports_internal.h
+ *
+ * @brief
+ * This file lists prototypes that do not have a header on the system,
+ * like syscalls, that we need to import in pthread.
+ */
+
+#include <os/base.h>
+#include <mach/mach.h>
+#include <sys/time.h>
+#include <stack_logging.h>
+
+extern boolean_t swtch_pri(int);
+
+// Defined in libsyscall; initialized in libmalloc
+extern malloc_logger_t *__syscall_logger;
+
+// syscalls
+
+extern uint32_t __psynch_mutexwait(pthread_mutex_t *mutex,  uint32_t mgen, uint32_t  ugen, uint64_t tid, uint32_t flags);
+extern uint32_t __psynch_mutexdrop(pthread_mutex_t *mutex,  uint32_t mgen, uint32_t  ugen, uint64_t tid, uint32_t flags);
+
+extern uint32_t __psynch_cvbroad(pthread_cond_t *cv, uint64_t cvlsgen, uint64_t cvudgen, uint32_t flags, pthread_mutex_t *mutex,  uint64_t mugen, uint64_t tid);
+extern uint32_t __psynch_cvsignal(pthread_cond_t *cv, uint64_t cvlsgen, uint32_t cvugen, int thread_port, pthread_mutex_t *mutex,  uint64_t mugen, uint64_t tid, uint32_t flags);
+extern uint32_t __psynch_cvwait(pthread_cond_t *cv, uint64_t cvlsgen, uint32_t cvugen, pthread_mutex_t *mutex,  uint64_t mugen, uint32_t flags, int64_t sec, uint32_t nsec);
+extern uint32_t __psynch_cvclrprepost(void *cv, uint32_t cvgen, uint32_t cvugen, uint32_t cvsgen, uint32_t prepocnt, uint32_t preposeq, uint32_t flags);
+
+extern uint32_t __psynch_rw_longrdlock(pthread_rwlock_t *rwlock, uint32_t lgenval, uint32_t ugenval, uint32_t rw_wc, int flags);
+extern uint32_t __psynch_rw_yieldwrlock(pthread_rwlock_t *rwlock, uint32_t lgenval, uint32_t ugenval, uint32_t rw_wc, int flags);
+extern int      __psynch_rw_downgrade(pthread_rwlock_t *rwlock, uint32_t lgenval, uint32_t ugenval, uint32_t rw_wc, int flags);
+extern uint32_t __psynch_rw_upgrade(pthread_rwlock_t *rwlock, uint32_t lgenval, uint32_t ugenval, uint32_t rw_wc, int flags);
+extern uint32_t __psynch_rw_rdlock(pthread_rwlock_t *rwlock, uint32_t lgenval, uint32_t ugenval, uint32_t rw_wc, int flags);
+extern uint32_t __psynch_rw_wrlock(pthread_rwlock_t *rwlock, uint32_t lgenval, uint32_t ugenval, uint32_t rw_wc, int flags);
+extern uint32_t __psynch_rw_unlock(pthread_rwlock_t *rwlock, uint32_t lgenval, uint32_t ugenval, uint32_t rw_wc, int flags);
+extern uint32_t __psynch_rw_unlock2(pthread_rwlock_t *rwlock, uint32_t lgenval, uint32_t ugenval, uint32_t rw_wc, int flags);
+
+extern uint32_t __bsdthread_ctl(uintptr_t cmd, uintptr_t arg1, uintptr_t arg2, uintptr_t arg3);
+extern pthread_t __bsdthread_create(void *(*func)(void *), void *func_arg, void *stack, pthread_t  thread, unsigned int flags);
+extern int      __bsdthread_register(void (*)(pthread_t, mach_port_t, void *(*)(void *), void *, size_t, unsigned int), void (*)(pthread_t, mach_port_t, void *, void *, int), int,void (*)(pthread_t, mach_port_t, void *(*)(void *), void *, size_t, unsigned int), int32_t *,__uint64_t);
+extern int      __bsdthread_terminate(void *freeaddr, size_t freesize, mach_port_t kport, mach_port_t joinsem);
+
+extern uint64_t __thread_selfid(void);
+extern int      __disable_threadsignal(int);
+
+extern int      __pthread_canceled(int);
+extern int      __pthread_chdir(const char *path);
+extern int      __pthread_fchdir(int fd);
+extern int      __pthread_kill(mach_port_t, int);
+extern int      __pthread_markcancel(mach_port_t);
+extern int      __pthread_sigmask(int, const sigset_t *, sigset_t *);
+
+extern int      __gettimeofday(struct timeval *, struct timezone *);
+extern void     __exit(int) __attribute__((noreturn));
+extern int      __proc_info(int callnum, int pid, int flavor, uint64_t arg, void *buffer, int buffersize);
+extern int      __semwait_signal_nocancel(int, int, int, int, __int64_t, __int32_t);
+extern int      __sigwait(const sigset_t *set, int *sig);
+extern int      __sysctl(int *name, u_int namelen, void *oldp, size_t *oldlenp, void *newp, size_t newlen);
+
+
+#endif // __LIBPTHREAD_IMPORTS_INTERNAL_H__