+/*
+ * Copyright (c) 2012 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 __PTHREAD_PRIVATE_H__
+#define __PTHREAD_PRIVATE_H__
+
+#include <sys/cdefs.h>
+#include <Availability.h>
+#include <pthread/tsd_private.h>
+
+__API_AVAILABLE(macos(10.9), ios(7.0))
+pthread_t pthread_main_thread_np(void);
+
+struct _libpthread_functions {
+ unsigned long version;
+ void (*exit)(int); // added with version=1
+ void *(*malloc)(size_t); // added with version=2
+ void (*free)(void *); // added with version=2
+};
+
+/*!
+ * @function pthread_chdir_np
+ *
+ * @abstract
+ * Sets the per-thread current working directory.
+ *
+ * @discussion
+ * This will set the per-thread current working directory to the provided path.
+ * If this is used on a workqueue (dispatch) thread, it MUST be unset with
+ * pthread_fchdir_np(-1) before returning.
+ *
+ * posix_spawn_file_actions_addchdir_np is a better approach if this call would
+ * only be used to spawn a new process with a given working directory.
+ *
+ * @param path
+ * The path of the new working directory.
+ *
+ * @result
+ * 0 upon success, -1 upon error and errno is set.
+ */
+__API_AVAILABLE(macos(10.12), ios(10.0), tvos(10.0), watchos(3.0))
+int pthread_chdir_np(const char *path);
+
+/*!
+ * @function pthread_fchdir_np
+ *
+ * @abstract
+ * Sets the per-thread current working directory.
+ *
+ * @discussion
+ * This will set the per-thread current working directory to the provided
+ * directory fd. If this is used on a workqueue (dispatch) thread, it MUST be
+ * unset with pthread_fchdir_np(-1) before returning.
+ *
+ * posix_spawn_file_actions_addfchdir_np is a better approach if this call would
+ * only be used to spawn a new process with a given working directory.
+ *
+ * @param fd
+ * A file descriptor to the new working directory. Pass -1 to unset the
+ * per-thread working directory.
+ *
+ * @result
+ * 0 upon success, -1 upon error and errno is set.
+ */
+__API_AVAILABLE(macos(10.12), ios(10.0), tvos(10.0), watchos(3.0))
+int pthread_fchdir_np(int fd);
+
+__API_AVAILABLE(macos(10.14), ios(12.0), tvos(12.0), watchos(5.0))
+int pthread_attr_setcpupercent_np(pthread_attr_t * __restrict, int, unsigned long);
+
+__API_AVAILABLE(macos(10.15), ios(13.0), tvos(13.0), watchos(6.0))
+int pthread_current_stack_contains_np(const void *, size_t);
+
+/*!
+ * @function pthread_self_is_exiting_np
+ *
+ * @abstract
+ * Returns whether the current thread is exiting.
+ *
+ * @discussion
+ * This can be useful for certain introspection tools to know that malloc/free
+ * is called from the TSD destruction codepath.
+ *
+ * @result
+ * 0 if the thread is not exiting
+ * 1 if the thread is exiting
+ */
+__API_AVAILABLE(macos(10.16), ios(14.0), tvos(14.0), watchos(7.0))
+int pthread_self_is_exiting_np(void);
+
+#ifdef __LP64__
+#define _PTHREAD_STRUCT_DIRECT_THREADID_OFFSET -8
+#define _PTHREAD_STRUCT_DIRECT_TSD_OFFSET 224
+#else
+#define _PTHREAD_STRUCT_DIRECT_THREADID_OFFSET -16
+#define _PTHREAD_STRUCT_DIRECT_TSD_OFFSET 176
+#endif
+
+#if !TARGET_OS_SIMULATOR
+#if defined(__i386__)
+#define _pthread_direct_tsd_relative_access(type, offset) \
+ (type *)((char *)_pthread_getspecific_direct(_PTHREAD_TSD_SLOT_PTHREAD_SELF) + \
+ _PTHREAD_STRUCT_DIRECT_TSD_OFFSET + _PTHREAD_STRUCT_DIRECT_##offset##_OFFSET)
+#elif defined(OS_GS_RELATIVE)
+#define _pthread_direct_tsd_relative_access(type, offset) \
+ (type OS_GS_RELATIVE *)(_PTHREAD_STRUCT_DIRECT_##offset##_OFFSET)
+#elif defined(_os_tsd_get_base)
+#define _pthread_direct_tsd_relative_access(type, offset) \
+ (type *)((char *)_os_tsd_get_base() + _PTHREAD_STRUCT_DIRECT_##offset##_OFFSET)
+#else
+#error "unknown configuration"
+#endif
+#endif // !TARGET_OS_SIMULATOR
+
+/* N.B. DO NOT USE UNLESS YOU ARE REBUILT AS PART OF AN OS TRAIN WORLDBUILD */
+__header_always_inline __pure2 uint64_t
+_pthread_threadid_self_np_direct(void)
+{
+#ifdef _pthread_direct_tsd_relative_access
+ return *_pthread_direct_tsd_relative_access(uint64_t, THREADID);
+#else
+ uint64_t threadid = 0;
+ pthread_threadid_np(NULL, &threadid);
+ return threadid;
+#endif
+}
+
+__header_always_inline __pure2 pthread_t
+_pthread_self_direct(void)
+{
+#if TARGET_OS_SIMULATOR || defined(__i386__) || defined(__x86_64__)
+ return (pthread_t)_pthread_getspecific_direct(_PTHREAD_TSD_SLOT_PTHREAD_SELF);
+#elif defined(__arm__) || defined(__arm64__)
+ uintptr_t tsd_base = (uintptr_t)_os_tsd_get_base();
+ return (pthread_t)(tsd_base - _PTHREAD_STRUCT_DIRECT_TSD_OFFSET);
+#else
+#error unsupported architecture
+#endif
+}
+
+__header_always_inline __pure2 mach_port_t
+_pthread_mach_thread_self_direct(void)
+{
+ return (mach_port_t)(uintptr_t)
+ _pthread_getspecific_direct(_PTHREAD_TSD_SLOT_MACH_THREAD_SELF);
+}
+
+__header_always_inline int *
+_pthread_errno_address_direct(void)
+{
+ return (int *)_pthread_getspecific_direct(_PTHREAD_TSD_SLOT_ERRNO);
+}
+
+/* get the thread specific errno value */
+__header_always_inline int
+_pthread_get_errno_direct(void)
+{
+ return *_pthread_errno_address_direct();
+}
+
+/* set the thread specific errno value */
+__header_always_inline void
+_pthread_set_errno_direct(int value)
+{
+ *_pthread_errno_address_direct() = value;
+}
+
+#endif // __PTHREAD_PRIVATE_H__
projects / apple / libpthread.git / blobdiff