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internal.h
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/*
* Copyright (c) 2008-2013 Apple Inc. All rights reserved.
*
* @APPLE_APACHE_LICENSE_HEADER_START@
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* @APPLE_APACHE_LICENSE_HEADER_END@
*/
/*
* IMPORTANT: This header file describes INTERNAL interfaces to libdispatch
* which are subject to change in future releases of Mac OS X. Any applications
* relying on these interfaces WILL break.
*/
#ifndef __DISPATCH_INTERNAL__
#define __DISPATCH_INTERNAL__
#if __has_include(<config/config_ac.h>)
#include <config/config_ac.h>
#else
#include <config/config.h>
#endif
#define __DISPATCH_BUILDING_DISPATCH__
#define __DISPATCH_INDIRECT__
#ifdef __APPLE__
#include <Availability.h>
#include <os/availability.h>
#include <TargetConditionals.h>
#endif // __APPLE__
#if !defined(DISPATCH_MACH_SPI) && TARGET_OS_MAC
#define DISPATCH_MACH_SPI 1
#endif
#if !defined(OS_VOUCHER_CREATION_SPI) && TARGET_OS_MAC
#define OS_VOUCHER_CREATION_SPI 1
#endif
#if !defined(OS_VOUCHER_ACTIVITY_SPI) && TARGET_OS_MAC
#define OS_VOUCHER_ACTIVITY_SPI 1
#endif
#if !defined(OS_VOUCHER_ACTIVITY_GENERATE_SWAPS)
#define OS_VOUCHER_ACTIVITY_GENERATE_SWAPS 0
#endif
#if !defined(OS_FIREHOSE_SPI) && TARGET_OS_MAC
#define OS_FIREHOSE_SPI 1
#endif
#if !defined(DISPATCH_LAYOUT_SPI) && TARGET_OS_MAC
#define DISPATCH_LAYOUT_SPI 1
#endif
#if __has_include(<mach-o/dyld_priv.h>)
#include <mach-o/dyld_priv.h>
#if !defined(HAVE_DYLD_IS_MEMORY_IMMUTABLE)
#if defined(DYLD_MACOSX_VERSION_10_12) || defined(DYLD_IOS_VERSION_10_0)
#define HAVE_DYLD_IS_MEMORY_IMMUTABLE 1
#else
#define HAVE_DYLD_IS_MEMORY_IMMUTABLE 0
#endif
#endif // !defined(HAVE_DYLD_IS_MEMORY_IMMUTABLE)
#endif // __has_include(<mach-o/dyld_priv.h>)
#if !defined(USE_OBJC) && HAVE_OBJC
#define USE_OBJC 1
#endif
#if USE_OBJC
#define OS_OBJECT_HAVE_OBJC_SUPPORT 1
#if defined(__OBJC__)
#define OS_OBJECT_USE_OBJC 1
// Force internal Objective-C sources to use class-visible headers
// even when not compiling in Swift.
#define OS_OBJECT_SWIFT3 1
#else
#define OS_OBJECT_USE_OBJC 0
#endif // __OBJC__
#else
#define OS_OBJECT_HAVE_OBJC_SUPPORT 0
#endif // USE_OBJC
#include <dispatch/dispatch.h>
#include <dispatch/base.h>
#define __DISPATCH_HIDE_SYMBOL(sym, version) \
__asm__(".section __TEXT,__const\n\t" \
".globl $ld$hide$os" #version "$_" #sym "\n\t" \
"$ld$hide$os" #version "$_" #sym ":\n\t" \
" .byte 0\n\t" \
".previous")
#ifndef DISPATCH_HIDE_SYMBOL
#if TARGET_OS_MAC && !TARGET_OS_IPHONE
#define DISPATCH_HIDE_SYMBOL(sym, osx, ios, tvos, watchos) \
__DISPATCH_HIDE_SYMBOL(sym, osx)
#else
#define DISPATCH_HIDE_SYMBOL(sym, osx, ios, tvos, watchos)
#endif
#endif
#ifndef DISPATCH_STATIC_GLOBAL
#define DISPATCH_STATIC_GLOBAL(declaration) static declaration
#endif
#ifndef DISPATCH_GLOBAL
#define DISPATCH_GLOBAL(declaration) declaration
#endif
#ifndef DISPATCH_GLOBAL_INIT
#define DISPATCH_GLOBAL_INIT(declaration, ...) declaration = __VA_ARGS__
#endif
#if defined(__OBJC__) || defined(__cplusplus)
#define DISPATCH_PURE_C 0
#else
#define DISPATCH_PURE_C 1
#endif
#ifdef __OBJC__
@protocol OS_dispatch_queue;
#endif
// Lane cluster class: type for all the queues that have a single head/tail pair
typedef union {
struct dispatch_lane_s *_dl;
struct dispatch_queue_static_s *_dsq;
struct dispatch_queue_global_s *_dgq;
struct dispatch_queue_pthread_root_s *_dpq;
struct dispatch_source_s *_ds;
struct dispatch_mach_s *_dm;
#ifdef __OBJC__
id<OS_dispatch_queue> _objc_dq; // unsafe cast for the sake of object.m
#endif
} dispatch_lane_class_t DISPATCH_TRANSPARENT_UNION;
// Dispatch queue cluster class: type for any dispatch_queue_t
typedef union {
struct dispatch_queue_s *_dq;
struct dispatch_workloop_s *_dwl;
struct dispatch_lane_s *_dl;
struct dispatch_queue_static_s *_dsq;
struct dispatch_queue_global_s *_dgq;
struct dispatch_queue_pthread_root_s *_dpq;
struct dispatch_source_s *_ds;
struct dispatch_mach_s *_dm;
dispatch_lane_class_t _dlu;
#ifdef __OBJC__
id<OS_dispatch_queue> _objc_dq;
#endif
} dispatch_queue_class_t DISPATCH_TRANSPARENT_UNION;
#ifndef __OBJC__
typedef union {
struct _os_object_s *_os_obj;
struct dispatch_object_s *_do;
struct dispatch_queue_s *_dq;
struct dispatch_queue_attr_s *_dqa;
struct dispatch_group_s *_dg;
struct dispatch_source_s *_ds;
struct dispatch_mach_s *_dm;
struct dispatch_mach_msg_s *_dmsg;
struct dispatch_semaphore_s *_dsema;
struct dispatch_data_s *_ddata;
struct dispatch_io_s *_dchannel;
struct dispatch_continuation_s *_dc;
struct dispatch_sync_context_s *_dsc;
struct dispatch_operation_s *_doperation;
struct dispatch_disk_s *_ddisk;
struct dispatch_workloop_s *_dwl;
struct dispatch_lane_s *_dl;
struct dispatch_queue_static_s *_dsq;
struct dispatch_queue_global_s *_dgq;
struct dispatch_queue_pthread_root_s *_dpq;
dispatch_queue_class_t _dqu;
dispatch_lane_class_t _dlu;
uintptr_t _do_value;
} dispatch_object_t DISPATCH_TRANSPARENT_UNION;
DISPATCH_ALWAYS_INLINE
static inline dispatch_object_t
upcast(dispatch_object_t dou)
{
return dou;
}
#endif // __OBJC__
#include <os/object.h>
#include <dispatch/time.h>
#include <dispatch/object.h>
#include <dispatch/queue.h>
#include <dispatch/block.h>
#include <dispatch/source.h>
#include <dispatch/group.h>
#include <dispatch/semaphore.h>
#include <dispatch/once.h>
#include <dispatch/data.h>
#include <dispatch/io.h>
/* private.h must be included last to avoid picking up installed headers. */
#if !defined(_WIN32)
#include <pthread.h>
#endif
#include "os/object_private.h"
#include "queue_private.h"
#include "workloop_private.h"
#include "source_private.h"
#include "mach_private.h"
#include "data_private.h"
#include "os/voucher_private.h"
#include "os/voucher_activity_private.h"
#include "io_private.h"
#include "layout_private.h"
#include "benchmark.h"
#include "private.h"
#if HAVE_LIBKERN_OSCROSSENDIAN_H
#include <libkern/OSCrossEndian.h>
#endif
#if HAVE_LIBKERN_OSATOMIC_H
#include <libkern/OSAtomic.h>
#endif
#if HAVE_MACH
#include <mach/boolean.h>
#include <mach/clock_types.h>
#include <mach/clock.h>
#include <mach/exception.h>
#include <mach/mach.h>
#include <mach/mach_error.h>
#include <mach/mach_host.h>
#include <mach/mach_interface.h>
#include <mach/mach_time.h>
#include <mach/mach_traps.h>
#include <mach/message.h>
#include <mach/mig_errors.h>
#include <mach/host_special_ports.h>
#include <mach/host_info.h>
#include <mach/notify.h>
#include <mach/mach_vm.h>
#include <mach/vm_map.h>
#if __has_include(<mach/mach_sync_ipc.h>)
#include <mach/mach_sync_ipc.h>
#endif
#endif /* HAVE_MACH */
#if __has_include(<os/reason_private.h>)
#define HAVE_OS_FAULT_WITH_PAYLOAD 1
#include <os/reason_private.h>
#include <os/variant_private.h>
#else
#define HAVE_OS_FAULT_WITH_PAYLOAD 0
#endif
#if HAVE_MALLOC_MALLOC_H
#include <malloc/malloc.h>
#endif
#include <sys/stat.h>
#if defined(_WIN32)
#include <time.h>
#else
#include <sys/mount.h>
#ifdef __ANDROID__
#include <linux/sysctl.h>
#endif /* __ANDROID__ */
#if !defined(__linux__)
#include <sys/sysctl.h>
#include <sys/queue.h>
#endif
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/mman.h>
#include <netinet/in.h>
#endif
#ifdef __BLOCKS__
#if __has_include(<Block_private.h>)
#include <Block_private.h>
#else
#include "BlocksRuntime/Block_private.h"
#endif // __has_include(<Block_private.h>)
#include <Block.h>
#endif /* __BLOCKS__ */
#include <assert.h>
#include <errno.h>
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include <limits.h>
#include <search.h>
#if USE_POSIX_SEM
#include <semaphore.h>
#endif
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
#include <unistd.h>
#endif
#if defined(_WIN32)
#include <io.h>
#include <crtdbg.h>
#endif
#include <inttypes.h>
/* More #includes at EOF (dependent on the contents of internal.h) ... */
__BEGIN_DECLS
/* SPI for Libsystem-internal use */
DISPATCH_EXPORT DISPATCH_NOTHROW void libdispatch_init(void);
#if !defined(_WIN32)
DISPATCH_EXPORT DISPATCH_NOTHROW void dispatch_atfork_prepare(void);
DISPATCH_EXPORT DISPATCH_NOTHROW void dispatch_atfork_parent(void);
DISPATCH_EXPORT DISPATCH_NOTHROW void dispatch_atfork_child(void);
#endif
// Abort on uncaught exceptions thrown from client callouts rdar://8577499
#if !defined(DISPATCH_USE_CLIENT_CALLOUT)
#define DISPATCH_USE_CLIENT_CALLOUT 1
#endif
#define DISPATCH_ALLOW_NON_LEAF_RETARGET 1
/* The "_debug" library build */
#ifndef DISPATCH_DEBUG
#define DISPATCH_DEBUG 0
#endif
#ifndef DISPATCH_PROFILE
#define DISPATCH_PROFILE 0
#endif
#if (TARGET_OS_OSX || DISPATCH_DEBUG || DISPATCH_PROFILE) && \
!defined(DISPATCH_USE_DTRACE)
#define DISPATCH_USE_DTRACE 1
#endif
#if DISPATCH_USE_DTRACE && (DISPATCH_INTROSPECTION || DISPATCH_DEBUG || \
DISPATCH_PROFILE) && !defined(DISPATCH_USE_DTRACE_INTROSPECTION)
#define DISPATCH_USE_DTRACE_INTROSPECTION 1
#endif
#ifndef DISPATCH_DEBUG_QOS
#define DISPATCH_DEBUG_QOS DISPATCH_DEBUG
#endif
#if defined(__GNUC__) || defined(__clang__)
#define DISPATCH_NOINLINE __attribute__((__noinline__))
#define DISPATCH_USED __attribute__((__used__))
#define DISPATCH_UNUSED __attribute__((__unused__))
#define DISPATCH_WEAK __attribute__((__weak__))
#define DISPATCH_OVERLOADABLE __attribute__((__overloadable__))
#if DISPATCH_DEBUG
#define DISPATCH_PACKED __attribute__((__packed__))
#define DISPATCH_ALWAYS_INLINE_NDEBUG
#else
#define DISPATCH_ALWAYS_INLINE_NDEBUG __attribute__((__always_inline__))
#endif
#else /* __GNUC__ */
#define DISPATCH_NOINLINE
#define DISPATCH_USED
#define DISPATCH_UNUSED
#define DISPATCH_WEAK
#define DISPATCH_ALWAYS_INLINE_NDEBUG
#endif /* __GNUC__ */
#define DISPATCH_CONCAT(x,y) DISPATCH_CONCAT1(x,y)
#define DISPATCH_CONCAT1(x,y) x ## y
#define DISPATCH_COUNT_ARGS(...) DISPATCH_COUNT_ARGS1(, ## __VA_ARGS__, \
_8, _7, _6, _5, _4, _3, _2, _1, _0)
#define DISPATCH_COUNT_ARGS1(z, a, b, c, d, e, f, g, h, cnt, ...) cnt
#if BYTE_ORDER == LITTLE_ENDIAN
#define DISPATCH_STRUCT_LE_2(a, b) struct { a; b; }
#define DISPATCH_STRUCT_LE_3(a, b, c) struct { a; b; c; }
#define DISPATCH_STRUCT_LE_4(a, b, c, d) struct { a; b; c; d; }
#else
#define DISPATCH_STRUCT_LE_2(a, b) struct { b; a; }
#define DISPATCH_STRUCT_LE_3(a, b, c) struct { c; b; a; }
#define DISPATCH_STRUCT_LE_4(a, b, c, d) struct { d; c; b; a; }
#endif
#if __has_feature(c_startic_assert)
#define DISPATCH_UNION_ASSERT(alias, st) \
_Static_assert(sizeof(struct { alias; }) == sizeof(st), "bogus union");
#else
#define DISPATCH_UNION_ASSERT(alias, st)
#endif
#define DISPATCH_UNION_LE(alias, ...) \
DISPATCH_UNION_ASSERT(alias, DISPATCH_CONCAT(DISPATCH_STRUCT_LE, \
DISPATCH_COUNT_ARGS(__VA_ARGS__))(__VA_ARGS__)) \
union { alias; DISPATCH_CONCAT(DISPATCH_STRUCT_LE, \
DISPATCH_COUNT_ARGS(__VA_ARGS__))(__VA_ARGS__); }
// workaround 6368156
#ifdef NSEC_PER_SEC
#undef NSEC_PER_SEC
#endif
#ifdef USEC_PER_SEC
#undef USEC_PER_SEC
#endif
#ifdef NSEC_PER_USEC
#undef NSEC_PER_USEC
#endif
#define NSEC_PER_SEC 1000000000ull
#define USEC_PER_SEC 1000000ull
#define NSEC_PER_USEC 1000ull
#if __GNUC__
#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
#else
#define likely(x) (!!(x))
#define unlikely(x) (!!(x))
#endif // __GNUC__
#define _LIST_IS_ENQUEUED(elm, field) \
((elm)->field.le_prev != NULL)
#define _LIST_MARK_NOT_ENQUEUED(elm, field) \
((void)((elm)->field.le_prev = NULL))
#define _TAILQ_IS_ENQUEUED(elm, field) \
((elm)->field.tqe_prev != NULL)
#define _TAILQ_MARK_NOT_ENQUEUED(elm, field) \
((void)((elm)->field.tqe_prev = NULL))
#if DISPATCH_DEBUG
// sys/queue.h debugging
#undef TRASHIT
#define TRASHIT(x) do {(x) = (void *)-1;} while (0)
#else // DISPATCH_DEBUG
#ifndef TRASHIT
#define TRASHIT(x)
#endif
#endif // DISPATCH_DEBUG
#define _LIST_TRASH_ENTRY(elm, field) do { \
TRASHIT((elm)->field.le_next); \
TRASHIT((elm)->field.le_prev); \
} while (0)
#define _TAILQ_TRASH_ENTRY(elm, field) do { \
TRASHIT((elm)->field.tqe_next); \
TRASHIT((elm)->field.tqe_prev); \
} while (0)
#define _TAILQ_TRASH_HEAD(head) do { \
TRASHIT((head)->tqh_first); \
TRASHIT((head)->tqh_last); \
} while (0)
#define DISPATCH_MODE_STRICT (1U << 0)
#define DISPATCH_MODE_NO_FAULTS (1U << 1)
extern uint8_t _dispatch_mode;
DISPATCH_EXPORT DISPATCH_NOINLINE DISPATCH_COLD
void _dispatch_bug(size_t line, uintptr_t val);
#if HAVE_MACH
DISPATCH_NOINLINE DISPATCH_COLD
void _dispatch_bug_mach_client(const char *msg, mach_msg_return_t kr);
#endif // HAVE_MACH
struct dispatch_unote_class_s;
DISPATCH_NOINLINE DISPATCH_COLD
void _dispatch_bug_kevent_client(const char *msg, const char *filter,
const char *operation, int err, uint64_t ident, uint64_t udata,
struct dispatch_unote_class_s *du);
DISPATCH_NOINLINE DISPATCH_COLD
void _dispatch_bug_kevent_vanished(struct dispatch_unote_class_s *du);
DISPATCH_NOINLINE DISPATCH_COLD
void _dispatch_bug_deprecated(const char *msg);
DISPATCH_NOINLINE DISPATCH_NORETURN DISPATCH_COLD
void _dispatch_abort(size_t line, uintptr_t val);
#if !defined(DISPATCH_USE_OS_DEBUG_LOG) && DISPATCH_DEBUG
#if __has_include(<os/debug_private.h>)
#define DISPATCH_USE_OS_DEBUG_LOG 1
#include <os/debug_private.h>
#endif
#endif // DISPATCH_USE_OS_DEBUG_LOG
#if !defined(DISPATCH_USE_SIMPLE_ASL) && !DISPATCH_USE_OS_DEBUG_LOG
#if __has_include(<_simple.h>)
#define DISPATCH_USE_SIMPLE_ASL 1
#include <_simple.h>
#endif
#endif // DISPATCH_USE_SIMPLE_ASL
#if !DISPATCH_USE_SIMPLE_ASL && !DISPATCH_USE_OS_DEBUG_LOG && !defined(_WIN32)
#include <syslog.h>
#endif
#define DISPATCH_BAD_INPUT ((void *_Nonnull)0)
#define DISPATCH_OUT_OF_MEMORY ((void *_Nonnull)0)
#if __has_attribute(diagnose_if)
#define DISPATCH_STATIC_ASSERT_IF(e) \
__attribute__((diagnose_if(e, "Assertion failed", "error")))
#else
#define DISPATCH_STATIC_ASSERT_IF(e)
#endif // __has_attribute(diagnose_if)
#if DISPATCH_USE_OS_DEBUG_LOG
#define _dispatch_log(msg, ...) os_debug_log("libdispatch", msg, ## __VA_ARGS__)
#else
DISPATCH_EXPORT DISPATCH_NOINLINE DISPATCH_COLD
__attribute__((__format__(__printf__,1,2)))
void _dispatch_log(const char *msg, ...);
#endif // DISPATCH_USE_OS_DEBUG_LOG
#define dsnprintf(buf, siz, ...) \
({ size_t _siz = siz; int _r = snprintf(buf, _siz, __VA_ARGS__); \
_r < 0 ? 0u : ((size_t)_r > _siz ? _siz : (size_t)_r); })
#if __has_feature(c_static_assert) || __STDC_VERSION__ >= 201112L
#define _dispatch_static_assert(e, s, ...) _Static_assert(e, s)
#else
#define _dispatch_static_assert(e, s, ...)
#endif
#define dispatch_static_assert(e, ...) \
_dispatch_static_assert(e, ##__VA_ARGS__, #e)
#define dispatch_assert_aliases(t1, t2, f) \
dispatch_static_assert(offsetof(struct t1,f) == offsetof(struct t2,f), \
#t1 "::" #f " and " #t2 "::" #f " should alias")
/*
* For reporting bugs within libdispatch when using the "_debug" version of the
* library.
*/
DISPATCH_ALWAYS_INLINE
static inline void
_dispatch_assert(uintptr_t e, size_t line) DISPATCH_STATIC_ASSERT_IF(!e)
{
if (unlikely(DISPATCH_DEBUG && !e)) _dispatch_abort(line, e);
}
#define dispatch_assert(e) _dispatch_assert((uintptr_t)(e), __LINE__)
/*
* A lot of API return zero upon success and not-zero on fail. Let's capture
* and log the non-zero value
*/
DISPATCH_ALWAYS_INLINE
static inline void
_dispatch_assert_zero(uintptr_t e, size_t line) DISPATCH_STATIC_ASSERT_IF(e)
{
if (unlikely(DISPATCH_DEBUG && e)) _dispatch_abort(line, e);
}
#define dispatch_assert_zero(e) _dispatch_assert_zero((uintptr_t)(e), __LINE__)
/*
* For reporting bugs or impedance mismatches between libdispatch and external
* subsystems. These do NOT abort(), and are always compiled into the product.
*
* In particular, we wrap all system-calls with assume() macros.
*/
DISPATCH_ALWAYS_INLINE
static inline void
_dispatch_assume(uintptr_t e, size_t line) DISPATCH_STATIC_ASSERT_IF(!e)
{
if (unlikely(!e)) _dispatch_bug(line, e);
}
#define dispatch_assume(e) \
({ __typeof__(e) _e = (e); _dispatch_assume((uintptr_t)_e, __LINE__); _e; })
/*
* A lot of API return zero upon success and not-zero on fail. Let's capture
* and log the non-zero value
*/
DISPATCH_ALWAYS_INLINE
static inline void
_dispatch_assume_zero(uintptr_t e, size_t line) DISPATCH_STATIC_ASSERT_IF(e)
{
if (unlikely(e)) _dispatch_bug(line, e);
}
#define dispatch_assume_zero(e) \
({ __typeof__(e) _e = (e); _dispatch_assume_zero((uintptr_t)_e, __LINE__); _e; })
/* Make sure the debug statments don't get too stale */
#define _dispatch_debug(x, args...) do { \
if (DISPATCH_DEBUG) { \
_dispatch_log("%u\t%p\t" x, __LINE__, \
(void *)_dispatch_thread_self(), ##args); \
} \
} while (0)
#if DISPATCH_DEBUG
/* This is the private version of the deprecated dispatch_debug() */
DISPATCH_NONNULL2 DISPATCH_NOTHROW
__attribute__((__format__(printf,2,3)))
void
_dispatch_object_debug(dispatch_object_t object, const char *message, ...);
#else
#define _dispatch_object_debug(object, message, ...)
#endif // DISPATCH_DEBUG
#ifdef __BLOCKS__
#define _dispatch_Block_invoke(bb) \
((dispatch_function_t)((struct Block_layout *)bb)->invoke)
void *_dispatch_Block_copy(void *block);
#if __GNUC__
#define _dispatch_Block_copy(x) ((__typeof__(x))_dispatch_Block_copy(x))
#endif
void _dispatch_call_block_and_release(void *block);
#endif /* __BLOCKS__ */
bool _dispatch_parse_bool(const char *v);
bool _dispatch_getenv_bool(const char *env, bool default_v);
void _dispatch_temporary_resource_shortage(void);
void *_dispatch_calloc(size_t num_items, size_t size);
const char *_dispatch_strdup_if_mutable(const char *str);
void _dispatch_vtable_init(void);
char *_dispatch_get_build(void);
#if !defined(_WIN32)
int _dispatch_sigmask(void);
#endif
uint64_t _dispatch_timeout(dispatch_time_t when);
uint64_t _dispatch_time_nanoseconds_since_epoch(dispatch_time_t when);
#define _DISPATCH_UNSAFE_FORK_MULTITHREADED ((uint8_t)1)
#define _DISPATCH_UNSAFE_FORK_PROHIBIT ((uint8_t)2)
extern uint8_t _dispatch_unsafe_fork;
extern bool _dispatch_child_of_unsafe_fork;
void _dispatch_fork_becomes_unsafe_slow(void);
#define _dispatch_is_multithreaded_inline() \
((_dispatch_unsafe_fork & _DISPATCH_UNSAFE_FORK_MULTITHREADED) != 0)
DISPATCH_ALWAYS_INLINE
static inline void
_dispatch_fork_becomes_unsafe(void)
{
if (unlikely(!_dispatch_is_multithreaded_inline())) {
_dispatch_fork_becomes_unsafe_slow();
DISPATCH_COMPILER_CAN_ASSUME(_dispatch_is_multithreaded_inline());
}
}
#if DISPATCH_INTROSPECTION
#undef DISPATCH_PERF_MON
#define DISPATCH_PERF_MON 0
#endif
/* #includes dependent on internal.h */
#include "shims.h"
#include "event/event_internal.h"
// Older Mac OS X and iOS Simulator fallbacks
#ifndef HAVE_PTHREAD_WORKQUEUE_QOS
#if !DISPATCH_USE_INTERNAL_WORKQUEUE && HAVE__PTHREAD_WORKQUEUE_INIT && \
PTHREAD_WORKQUEUE_SPI_VERSION >= 20140213
#define HAVE_PTHREAD_WORKQUEUE_QOS 1
#else
#define HAVE_PTHREAD_WORKQUEUE_QOS 0
#endif
#endif // !defined(HAVE_PTHREAD_WORKQUEUE_QOS)
#ifndef HAVE_PTHREAD_WORKQUEUE_KEVENT
#if !DISPATCH_USE_INTERNAL_WORKQUEUE && HAVE__PTHREAD_WORKQUEUE_INIT && \
defined(KEVENT_FLAG_WORKQ) && PTHREAD_WORKQUEUE_SPI_VERSION >= 20150304
#define HAVE_PTHREAD_WORKQUEUE_KEVENT 1
#else
#define HAVE_PTHREAD_WORKQUEUE_KEVENT 0
#endif
#endif // !defined(HAVE_PTHREAD_WORKQUEUE_KEVENT)
#ifndef HAVE_PTHREAD_WORKQUEUE_WORKLOOP
#if HAVE_PTHREAD_WORKQUEUE_KEVENT && defined(WORKQ_FEATURE_WORKLOOP) && \
defined(KEVENT_FLAG_WORKLOOP) && \
DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(101300)
#define HAVE_PTHREAD_WORKQUEUE_WORKLOOP 1
#else
#define HAVE_PTHREAD_WORKQUEUE_WORKLOOP 0
#endif
#endif // !defined(HAVE_PTHREAD_WORKQUEUE_WORKLOOP)
#ifndef DISPATCH_USE_WORKQUEUE_NARROWING
#if HAVE_PTHREAD_WORKQUEUES && DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(101300)
#define DISPATCH_USE_WORKQUEUE_NARROWING 1
#else
#define DISPATCH_USE_WORKQUEUE_NARROWING 0
#endif
#endif // !defined(DISPATCH_USE_WORKQUEUE_NARROWING)
#ifndef DISPATCH_USE_PTHREAD_ROOT_QUEUES
#if defined(__BLOCKS__) && defined(__APPLE__)
#define DISPATCH_USE_PTHREAD_ROOT_QUEUES 1 // <rdar://problem/10719357>
#else
#define DISPATCH_USE_PTHREAD_ROOT_QUEUES 0
#endif
#endif // !defined(DISPATCH_USE_PTHREAD_ROOT_QUEUES)
#ifndef DISPATCH_USE_PTHREAD_POOL
#if DISPATCH_USE_PTHREAD_ROOT_QUEUES || DISPATCH_USE_INTERNAL_WORKQUEUE
#define DISPATCH_USE_PTHREAD_POOL 1
#else
#define DISPATCH_USE_PTHREAD_POOL 0
#endif
#endif // !defined(DISPATCH_USE_PTHREAD_POOL)
#ifndef DISPATCH_USE_KEVENT_WORKQUEUE
#if HAVE_PTHREAD_WORKQUEUE_KEVENT
#define DISPATCH_USE_KEVENT_WORKQUEUE 1
#else
#define DISPATCH_USE_KEVENT_WORKQUEUE 0
#endif
#endif // !defined(DISPATCH_USE_KEVENT_WORKQUEUE)
#if DISPATCH_USE_KEVENT_WORKQUEUE
#if !HAVE_PTHREAD_WORKQUEUE_QOS || !EV_UDATA_SPECIFIC
#error Invalid build configuration
#endif
#endif // DISPATCH_USE_KEVENT_WORKQUEUE
#ifndef DISPATCH_USE_MGR_THREAD
#if !DISPATCH_USE_KEVENT_WORKQUEUE || DISPATCH_DEBUG || DISPATCH_PROFILE
#define DISPATCH_USE_MGR_THREAD 1
#else
#define DISPATCH_USE_MGR_THREAD 0
#endif
#endif // !defined(DISPATCH_USE_MGR_THREAD)
#ifndef DISPATCH_USE_KEVENT_WORKLOOP
#if HAVE_PTHREAD_WORKQUEUE_WORKLOOP
#define DISPATCH_USE_KEVENT_WORKLOOP 1
#else
#define DISPATCH_USE_KEVENT_WORKLOOP 0
#endif
#endif // !defined(DISPATCH_USE_KEVENT_WORKLOOP)
#ifdef EVFILT_MEMORYSTATUS
#ifndef DISPATCH_USE_MEMORYSTATUS
#define DISPATCH_USE_MEMORYSTATUS 1
#endif
#endif // EVFILT_MEMORYSTATUS
#if TARGET_OS_SIMULATOR
#undef DISPATCH_USE_MEMORYPRESSURE_SOURCE
#define DISPATCH_USE_MEMORYPRESSURE_SOURCE 0
#endif // TARGET_OS_SIMULATOR
#if !defined(DISPATCH_USE_MEMORYPRESSURE_SOURCE) && DISPATCH_USE_MEMORYSTATUS
#define DISPATCH_USE_MEMORYPRESSURE_SOURCE 1
#endif
#if __has_include(<malloc_private.h>)
#include <malloc_private.h>
#else // __has_include(<malloc_private.h)
extern void malloc_memory_event_handler(unsigned long);
extern int malloc_engaged_nano(void);
#endif // __has_include(<malloc_private.h)
#if DISPATCH_USE_MEMORYPRESSURE_SOURCE
extern bool _dispatch_memory_warn;
#endif
#if defined(MACH_SEND_SYNC_OVERRIDE) && defined(MACH_RCV_SYNC_WAIT) && \
DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(101300) && \
!defined(DISPATCH_USE_MACH_SEND_SYNC_OVERRIDE)
#define DISPATCH_USE_MACH_SEND_SYNC_OVERRIDE 1
#endif
#if defined(F_SETNOSIGPIPE) && defined(F_GETNOSIGPIPE)
#ifndef DISPATCH_USE_SETNOSIGPIPE
#define DISPATCH_USE_SETNOSIGPIPE 1
#endif
#endif // F_SETNOSIGPIPE
#if defined(MACH_SEND_NOIMPORTANCE)
#ifndef DISPATCH_USE_CHECKIN_NOIMPORTANCE
#define DISPATCH_USE_CHECKIN_NOIMPORTANCE 1 // rdar://problem/16996737
#endif
#ifndef DISPATCH_USE_NOIMPORTANCE_QOS
#define DISPATCH_USE_NOIMPORTANCE_QOS 1 // rdar://problem/21414476
#endif
#endif // MACH_SEND_NOIMPORTANCE
#if HAVE_LIBPROC_INTERNAL_H
#include <libproc.h>
#include <libproc_internal.h>
#ifndef DISPATCH_USE_IMPORTANCE_ASSERTION
#define DISPATCH_USE_IMPORTANCE_ASSERTION 1
#endif
#endif // HAVE_LIBPROC_INTERNAL_H
#if HAVE_SYS_GUARDED_H
#include <sys/guarded.h>
#ifndef DISPATCH_USE_GUARDED_FD
#define DISPATCH_USE_GUARDED_FD 1
#endif
#endif // HAVE_SYS_GUARDED_H
#if DISPATCH_USE_DTRACE || DISPATCH_USE_DTRACE_INTROSPECTION
typedef struct dispatch_trace_timer_params_s {
int64_t deadline, interval, leeway;
} *dispatch_trace_timer_params_t;
#ifdef __cplusplus
extern "C++" {
#endif
#include "provider.h"
#ifdef __cplusplus
}
#endif
#endif // DISPATCH_USE_DTRACE || DISPATCH_USE_DTRACE_INTROSPECTION
#if __has_include(<sys/kdebug.h>)
#include <sys/kdebug.h>
#ifndef DBG_DISPATCH
#define DBG_DISPATCH 46
#endif
#ifndef KDBG_CODE
#define KDBG_CODE(...) 0
#define DBG_FUNC_START 0
#define DBG_FUNC_END 0
#endif
#define DISPATCH_CODE(subclass, code) \
KDBG_CODE(DBG_DISPATCH, DISPATCH_TRACE_SUBCLASS_##subclass, code)
#define DISPATCH_CODE_START(subclass, code) \
(DISPATCH_CODE(subclass, code) | DBG_FUNC_START)
#define DISPATCH_CODE_END(subclass, code) \
(DISPATCH_CODE(subclass, code) | DBG_FUNC_END)
#ifdef ARIADNEDBG_CODE
#define ARIADNE_ENTER_DISPATCH_MAIN_CODE ARIADNEDBG_CODE(220, 2)
#else
#define ARIADNE_ENTER_DISPATCH_MAIN_CODE 0
#endif
#if !defined(DISPATCH_USE_VOUCHER_KDEBUG_TRACE) && \
(DISPATCH_INTROSPECTION || DISPATCH_PROFILE || DISPATCH_DEBUG)
#define DISPATCH_USE_VOUCHER_KDEBUG_TRACE 1
#endif
#define DISPATCH_TRACE_SUBCLASS_DEFAULT 0
#define DISPATCH_TRACE_SUBCLASS_VOUCHER 1
#define DISPATCH_TRACE_SUBCLASS_PERF 2
#define DISPATCH_TRACE_SUBCLASS_MACH_MSG 3
#define DISPATCH_TRACE_SUBCLASS_PERF_MON 4
#define DISPATCH_TRACE_SUBCLASS_QOS_TRACE 5
#define DISPATCH_TRACE_SUBCLASS_FIREHOSE_TRACE 6
#define DISPATCH_PERF_non_leaf_retarget DISPATCH_CODE(PERF, 1)
#define DISPATCH_PERF_post_activate_retarget DISPATCH_CODE(PERF, 2)
#define DISPATCH_PERF_post_activate_mutation DISPATCH_CODE(PERF, 3)
#define DISPATCH_PERF_delayed_registration DISPATCH_CODE(PERF, 4)
#define DISPATCH_PERF_mutable_target DISPATCH_CODE(PERF, 5)
#define DISPATCH_PERF_strict_bg_timer DISPATCH_CODE(PERF, 6)
#define DISPATCH_PERF_suspended_timer_fire DISPATCH_CODE(PERF, 7)
#define DISPATCH_PERF_handlerless_source_fire DISPATCH_CODE(PERF, 8)
#define DISPATCH_PERF_source_registration_without_qos DISPATCH_CODE(PERF, 9)
#define DISPATCH_MACH_MSG_hdr_move DISPATCH_CODE(MACH_MSG, 1)
#define DISPATCH_PERF_MON_worker_thread_start DISPATCH_CODE_START(PERF_MON, 1)
#define DISPATCH_PERF_MON_worker_thread_end DISPATCH_CODE_END(PERF_MON, 1)
#define DISPATCH_PERF_MON_worker_useless DISPATCH_CODE(PERF_MON, 2)
#define DISPATCH_QOS_TRACE_queue_creation_start DISPATCH_CODE_START(QOS_TRACE, 1)
#define DISPATCH_QOS_TRACE_queue_creation_end DISPATCH_CODE_END(QOS_TRACE, 1)
#define DISPATCH_QOS_TRACE_queue_dispose DISPATCH_CODE(QOS_TRACE, 2)
#define DISPATCH_QOS_TRACE_private_block_creation DISPATCH_CODE(QOS_TRACE, 3)
#define DISPATCH_QOS_TRACE_private_block_dispose DISPATCH_CODE(QOS_TRACE, 4)
#define DISPATCH_QOS_TRACE_continuation_push_eb DISPATCH_CODE(QOS_TRACE, 5)
#define DISPATCH_QOS_TRACE_continuation_push_ab DISPATCH_CODE(QOS_TRACE, 6)
#define DISPATCH_QOS_TRACE_continuation_push_f DISPATCH_CODE(QOS_TRACE, 7)
#define DISPATCH_QOS_TRACE_source_push DISPATCH_CODE(QOS_TRACE, 8)
#define DISPATCH_QOS_TRACE_continuation_pop DISPATCH_CODE(QOS_TRACE, 9)
#define DISPATCH_QOS_TRACE_source_pop DISPATCH_CODE(QOS_TRACE, 10)
#define DISPATCH_QOS_TRACE_queue_item_complete DISPATCH_CODE(QOS_TRACE, 11)
#define DISPATCH_QOS_TRACE_src_callout DISPATCH_CODE(QOS_TRACE, 12)
#define DISPATCH_QOS_TRACE_src_dispose DISPATCH_CODE(QOS_TRACE, 13)
#define DISPATCH_FIREHOSE_TRACE_reserver_gave_up DISPATCH_CODE(FIREHOSE_TRACE, 1)
#define DISPATCH_FIREHOSE_TRACE_reserver_wait DISPATCH_CODE(FIREHOSE_TRACE, 2)
#define DISPATCH_FIREHOSE_TRACE_allocator DISPATCH_CODE(FIREHOSE_TRACE, 3)
#define DISPATCH_FIREHOSE_TRACE_wait_for_logd DISPATCH_CODE(FIREHOSE_TRACE, 4)
#define DISPATCH_FIREHOSE_TRACE_chunk_install DISPATCH_CODE(FIREHOSE_TRACE, 5)
DISPATCH_ALWAYS_INLINE
static inline void
_dispatch_ktrace_impl(uint32_t code, uint64_t a, uint64_t b,
uint64_t c, uint64_t d)
{
if (!code) return;
#ifdef _COMM_PAGE_KDEBUG_ENABLE
if (likely(*(volatile uint32_t *)_COMM_PAGE_KDEBUG_ENABLE == 0)) return;
#endif
kdebug_trace(code, a, b, c, d);
}
#define _dispatch_cast_to_uint64(e) \
__builtin_choose_expr(sizeof(e) > 4, \
((uint64_t)(e)), ((uint64_t)(uintptr_t)(e)))
#define _dispatch_ktrace(code, a, b, c, d) _dispatch_ktrace_impl(code, \
_dispatch_cast_to_uint64(a), _dispatch_cast_to_uint64(b), \
_dispatch_cast_to_uint64(c), _dispatch_cast_to_uint64(d))
#else // __has_include(<sys/kdebug.h>)
#define DISPATCH_CODE(subclass, code) 0
#define ARIADNE_ENTER_DISPATCH_MAIN_CODE 0
#define DISPATCH_USE_VOUCHER_KDEBUG_TRACE 0
#define _dispatch_ktrace(code, a, b, c, d)
#endif // !__has_include(<sys/kdebug.h>)
#define _dispatch_ktrace4(code, a, b, c, d) _dispatch_ktrace(code, a, b, c, d)
#define _dispatch_ktrace3(code, a, b, c) _dispatch_ktrace(code, a, b, c, 0)
#define _dispatch_ktrace2(code, a, b) _dispatch_ktrace(code, a, b, 0, 0)
#define _dispatch_ktrace1(code, a) _dispatch_ktrace(code, a, 0, 0, 0)
#define _dispatch_ktrace0(code) _dispatch_ktrace(code, 0, 0, 0, 0)
#define BITPACK_UINT32_PAIR(a, b) (((uint64_t) (a) << 32) | (uint64_t) (b))
#ifndef MACH_MSGH_BITS_VOUCHER_MASK
#define MACH_MSGH_BITS_VOUCHER_MASK 0x001f0000
#define MACH_MSGH_BITS_SET_PORTS(remote, local, voucher) \
(((remote) & MACH_MSGH_BITS_REMOTE_MASK) | \
(((local) << 8) & MACH_MSGH_BITS_LOCAL_MASK) | \
(((voucher) << 16) & MACH_MSGH_BITS_VOUCHER_MASK))
#define MACH_MSGH_BITS_VOUCHER(bits) \
(((bits) & MACH_MSGH_BITS_VOUCHER_MASK) >> 16)
#define MACH_MSGH_BITS_HAS_VOUCHER(bits) \
(MACH_MSGH_BITS_VOUCHER(bits) != MACH_MSGH_BITS_ZERO)
#define msgh_voucher_port msgh_reserved
#define mach_voucher_t mach_port_t
#define MACH_VOUCHER_NULL MACH_PORT_NULL
#define MACH_SEND_INVALID_VOUCHER 0x10000005
#endif
#ifndef VOUCHER_USE_MACH_VOUCHER
#if __has_include(<mach/mach_voucher.h>)
#define VOUCHER_USE_MACH_VOUCHER 1
#endif
#endif // VOUCHER_USE_MACH_VOUCHER
#ifndef VOUCHER_USE_EMPTY_MACH_BASE_VOUCHER
#if RDAR_24272659 // FIXME: <rdar://problem/24272659>
#define VOUCHER_USE_EMPTY_MACH_BASE_VOUCHER 1
#else // RDAR_24272659
#define VOUCHER_USE_EMPTY_MACH_BASE_VOUCHER 0
#endif // RDAR_24272659
#endif
#ifndef VOUCHER_USE_PERSONA
#if VOUCHER_USE_MACH_VOUCHER && defined(BANK_PERSONA_TOKEN) && \
!TARGET_OS_SIMULATOR
#define VOUCHER_USE_PERSONA 1
#else
#define VOUCHER_USE_PERSONA 0
#endif
#endif // VOUCHER_USE_PERSONA
#if VOUCHER_USE_MACH_VOUCHER
#undef DISPATCH_USE_IMPORTANCE_ASSERTION
#define DISPATCH_USE_IMPORTANCE_ASSERTION 0
#else
#undef MACH_RCV_VOUCHER
#define MACH_RCV_VOUCHER 0
#define VOUCHER_USE_PERSONA 0
#endif // VOUCHER_USE_MACH_VOUCHER
#define _dispatch_hardware_crash() \
__asm__(""); __builtin_trap() // <rdar://problem/17464981>
#ifdef _WIN32
#define _dispatch_set_crash_log_cause_and_message(ac, msg) do { \
(void)(ac); \
_dispatch_set_crash_log_message_dynamic((msg)); \
} while (0)
#define _dispatch_set_crash_log_message(msg) \
_dispatch_set_crash_log_message_dynamic((msg))
#define _dispatch_set_crash_log_message_dynamic(msg) _RPTF0(_CRT_ASSERT, (msg))
#else // _WIN32
#define _dispatch_set_crash_log_cause_and_message(ac, msg) ((void)(ac))
#define _dispatch_set_crash_log_message(msg)
#define _dispatch_set_crash_log_message_dynamic(msg)
#endif // _WIN32
#if HAVE_MACH