libdispatch-913.30.4.tar.gz

[apple/libdispatch.git] / src / internal.h

diff --git a/src/internal.h b/src/internal.h
index d55540b0d06e7272a44d911f7e66cb5e850a6297..286e53458d3adca6db76e6766ee37fa7c940b58a 100644 (file)
--- a/src/internal.h
+++ b/src/internal.h
@@ -1,20 +1,20 @@
 /*
 /*

- * Copyright (c) 2008-2009 Apple Inc. All rights reserved.
+ * Copyright (c) 2008-2013 Apple Inc. All rights reserved.

  *
  * @APPLE_APACHE_LICENSE_HEADER_START@
  *
  * @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
  * 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
  *     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.
  * 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@
  */
 
  * @APPLE_APACHE_LICENSE_HEADER_END@
  */
 


@@ -27,35 +27,200 @@
 #ifndef __DISPATCH_INTERNAL__
 #define __DISPATCH_INTERNAL__
 
 #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__
 #define __DISPATCH_BUILDING_DISPATCH__
 #define __DISPATCH_INDIRECT__

-#include "dispatch.h"
-#include "base.h"
-#include "time.h"
-#include "queue.h"
-#include "object.h"
-#include "source.h"
-#include "group.h"
-#include "semaphore.h"
-#include "once.h"
-#include "benchmark.h"

 
 

-/* private.h uses #include_next and must be included last to avoid picking
- * up installed headers. */
+#ifdef __APPLE__
+#include <Availability.h>
+#include <os/availability.h>
+#include <TargetConditionals.h>
+
+#ifndef TARGET_OS_MAC_DESKTOP
+#define TARGET_OS_MAC_DESKTOP  (TARGET_OS_MAC && \
+               !TARGET_OS_SIMULATOR && !TARGET_OS_IPHONE && !TARGET_OS_EMBEDDED)
+#endif
+
+#if TARGET_OS_MAC_DESKTOP
+#  define DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(x) \
+               (__MAC_OS_X_VERSION_MIN_REQUIRED >= (x))
+#  if !DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(101200)
+#    error "OS X hosts older than OS X 10.12 aren't supported anymore"
+#  endif // !DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(101200)
+#elif TARGET_OS_SIMULATOR
+#  define DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(x) \
+               (IPHONE_SIMULATOR_HOST_MIN_VERSION_REQUIRED >= (x))
+#  if !DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(101200)
+#    error "Simulator hosts older than OS X 10.12 aren't supported anymore"
+#  endif // !DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(101200)
+#else
+#  define DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(x) 1
+#  if __IPHONE_OS_VERSION_MIN_REQUIRED < 90000
+#    error "iOS hosts older than iOS 9.0 aren't supported anymore"
+#  endif
+#endif
+
+#else // !__APPLE__
+#define DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(x) 0
+#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
+
+#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>
+#if !TARGET_OS_WIN32
+#include <dispatch/io.h>
+#endif
+
+#if defined(__OBJC__) || defined(__cplusplus)
+#define DISPATCH_PURE_C 0
+#else
+#define DISPATCH_PURE_C 1
+#endif
+
+/* private.h must be included last to avoid picking up installed headers. */
+#include <pthread.h>
+#include "os/object_private.h"

 #include "queue_private.h"
 #include "source_private.h"
 #include "queue_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"
+#if !TARGET_OS_WIN32
+#include "io_private.h"
+#endif
+#include "layout_private.h"
+#include "benchmark.h"

 #include "private.h"
 #include "private.h"

-#include "legacy.h"
+
+/* SPI for Libsystem-internal use */
+DISPATCH_EXPORT DISPATCH_NOTHROW void libdispatch_init(void);
+#if !TARGET_OS_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
+

 /* More #includes at EOF (dependent on the contents of internal.h) ... */
 
 /* More #includes at EOF (dependent on the contents of internal.h) ... */
 

+// 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
 
 /* The "_debug" library build */
 #ifndef DISPATCH_DEBUG
 #define DISPATCH_DEBUG 0
 #endif
 

+#ifndef DISPATCH_PROFILE
+#define DISPATCH_PROFILE 0
+#endif
+
+#if (!TARGET_OS_EMBEDDED || 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 HAVE_LIBKERN_OSCROSSENDIAN_H

 #include <libkern/OSCrossEndian.h>
 #include <libkern/OSCrossEndian.h>

+#endif
+#if HAVE_LIBKERN_OSATOMIC_H

 #include <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/boolean.h>
 #include <mach/clock_types.h>
 #include <mach/clock.h>


@@ -68,27 +233,51 @@
 #include <mach/mach_traps.h>
 #include <mach/message.h>
 #include <mach/mig_errors.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/host_info.h>
 #include <mach/notify.h>

+#include <mach/mach_vm.h>
+#include <mach/vm_map.h>
+#endif /* HAVE_MACH */
+#if HAVE_MALLOC_MALLOC_H

 #include <malloc/malloc.h>
 #include <malloc/malloc.h>

-#include <sys/event.h>
+#endif
+
+#include <sys/stat.h>
+
+#if !TARGET_OS_WIN32

 #include <sys/mount.h>
 #include <sys/queue.h>
 #include <sys/mount.h>
 #include <sys/queue.h>

-#include <sys/stat.h>
+#ifdef __ANDROID__
+#include <linux/sysctl.h>
+#else

 #include <sys/sysctl.h>
 #include <sys/sysctl.h>

-#include <sys/syslimits.h>
+#endif /* __ANDROID__ */

 #include <sys/socket.h>
 #include <sys/socket.h>

+#include <sys/time.h>
+#include <sys/mman.h>

 #include <netinet/in.h>
 #include <netinet/in.h>

+#endif

 
 #ifdef __BLOCKS__
 
 #ifdef __BLOCKS__

+#if __has_include(<Block_private.h>)

 #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>
 #include <Block.h>
 #endif /* __BLOCKS__ */
 
 #include <assert.h>
 #include <errno.h>

+#if HAVE_FCNTL_H

 #include <fcntl.h>
 #include <fcntl.h>

+#endif
+#include <limits.h>

 #include <search.h>
 #include <search.h>

+#if USE_POSIX_SEM
+#include <semaphore.h>
+#endif

 #include <signal.h>
 #include <stdarg.h>
 #include <stdbool.h>
 #include <signal.h>
 #include <stdarg.h>
 #include <stdbool.h>


@@ -96,10 +285,57 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

-#include <syslog.h>
+#if HAVE_UNISTD_H

 #include <unistd.h>
 #include <unistd.h>

+#endif

 
 

-#define DISPATCH_NOINLINE      __attribute__((noinline))
+#if __GNUC__
+#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__))
+#define DISPATCH_PACKED __attribute__((__packed__))
+#if DISPATCH_DEBUG
+#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
 
 // workaround 6368156
 #ifdef NSEC_PER_SEC


@@ -116,184 +352,623 @@
 #define NSEC_PER_USEC 1000ull
 
 /* I wish we had __builtin_expect_range() */
 #define NSEC_PER_USEC 1000ull
 
 /* I wish we had __builtin_expect_range() */

-#define fastpath(x)    ((typeof(x))__builtin_expect((long)(x), ~0l))
-#define slowpath(x)    ((typeof(x))__builtin_expect((long)(x), 0l))
+#if __GNUC__
+#define _safe_cast_to_long(x) \
+               ({ _Static_assert(sizeof(typeof(x)) <= sizeof(long), \
+                               "__builtin_expect doesn't support types wider than long"); \
+                               (long)(x); })
+#define fastpath(x) ((typeof(x))__builtin_expect(_safe_cast_to_long(x), ~0l))
+#define slowpath(x) ((typeof(x))__builtin_expect(_safe_cast_to_long(x), 0l))
+#define likely(x) __builtin_expect(!!(x), 1)
+#define unlikely(x) __builtin_expect(!!(x), 0)
+#else
+#define fastpath(x) (x)
+#define slowpath(x) (x)
+#define likely(x) (!!(x))
+#define unlikely(x) (!!(x))
+#endif // __GNUC__

 
 

-void _dispatch_bug(size_t line, long val) __attribute__((__noinline__));
-void _dispatch_abort(size_t line, long val) __attribute__((__noinline__,__noreturn__));
-void _dispatch_log(const char *msg, ...) __attribute__((__noinline__,__format__(printf,1,2)));
-void _dispatch_logv(const char *msg, va_list) __attribute__((__noinline__,__format__(printf,1,0)));
+#define _TAILQ_IS_ENQUEUED(elm, field) \
+               ((elm)->field.tqe_prev != NULL)
+#define _TAILQ_MARK_NOT_ENQUEUED(elm, field) \
+               do { (elm)->field.tqe_prev = NULL; } while (0)
+
+#if DISPATCH_DEBUG
+// sys/queue.h debugging
+#if defined(__linux__)
+#define QUEUE_MACRO_DEBUG 1
+#else
+#undef TRASHIT
+#define TRASHIT(x) do {(x) = (void *)-1;} while (0)
+#endif
+#endif // DISPATCH_DEBUG
+#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)
+
+DISPATCH_EXPORT DISPATCH_NOINLINE
+void _dispatch_bug(size_t line, long val);
+
+DISPATCH_NOINLINE
+void _dispatch_bug_client(const char* msg);
+#if HAVE_MACH
+DISPATCH_NOINLINE
+void _dispatch_bug_mach_client(const char *msg, mach_msg_return_t kr);
+#endif // HAVE_MACH
+DISPATCH_NOINLINE
+void _dispatch_bug_kevent_client(const char* msg, const char* filter,
+               const char *operation, int err);
+
+DISPATCH_NOINLINE
+void _dispatch_bug_deprecated(const char *msg);
+
+DISPATCH_NOINLINE DISPATCH_NORETURN
+void _dispatch_abort(size_t line, long 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 && !TARGET_OS_WIN32
+#include <syslog.h>
+#endif
+
+#if DISPATCH_USE_OS_DEBUG_LOG
+#define _dispatch_log(msg, ...) os_debug_log("libdispatch", msg, ## __VA_ARGS__)
+#else
+DISPATCH_EXPORT DISPATCH_NOINLINE __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 __GNUC__
+#define dispatch_static_assert(e) ({ \
+               char __compile_time_assert__[(bool)(e) ? 1 : -1] DISPATCH_UNUSED; \
+       })
+#else
+#define dispatch_static_assert(e)
+#endif
+
+#define DISPATCH_BAD_INPUT             ((void *_Nonnull)0)
+#define DISPATCH_OUT_OF_MEMORY ((void *_Nonnull)0)

 
 /*
 
 /*

- * For reporting bugs within libdispatch when using the "_debug" version of the library.
+ * For reporting bugs within libdispatch when using the "_debug" version of the
+ * library.

  */
  */

-#define dispatch_assert(e)     do {    \
-               if (__builtin_constant_p(e)) {  \
-                       char __compile_time_assert__[(bool)(e) ? 1 : -1] __attribute__((unused));       \
-               } else {        \
-                       typeof(e) _e = fastpath(e); /* always eval 'e' */       \
-                       if (DISPATCH_DEBUG && !_e) {    \
-                               _dispatch_abort(__LINE__, (long)_e);    \
-                       }       \
-               }       \
+#if __APPLE__
+#define dispatch_assert(e) do { \
+               if (__builtin_constant_p(e)) { \
+                       dispatch_static_assert(e); \
+               } else { \
+                       typeof(e) _e = (e); /* always eval 'e' */ \
+                       if (unlikely(DISPATCH_DEBUG && !_e)) { \
+                               _dispatch_abort(__LINE__, (long)_e); \
+                       } \
+               } \

        } while (0)
        } while (0)

-/* A lot of API return zero upon success and not-zero on fail. Let's capture and log the non-zero value */
-#define dispatch_assert_zero(e)        do {    \
-               if (__builtin_constant_p(e)) {  \
-                       char __compile_time_assert__[(bool)(!(e)) ? 1 : -1] __attribute__((unused));    \
-               } else {        \
-                       typeof(e) _e = slowpath(e); /* always eval 'e' */       \
-                       if (DISPATCH_DEBUG && _e) {     \
-                               _dispatch_abort(__LINE__, (long)_e);    \
-                       }       \
-               }       \
+#else
+static inline void
+_dispatch_assert(long e, size_t line)
+{
+       if (DISPATCH_DEBUG && !e) _dispatch_abort(line, e);
+}
+#define dispatch_assert(e) _dispatch_assert((long)(e), __LINE__)
+#endif /* __GNUC__ */
+
+#if __APPLE__
+/*
+ * A lot of API return zero upon success and not-zero on fail. Let's capture
+ * and log the non-zero value
+ */
+#define dispatch_assert_zero(e) do { \
+               if (__builtin_constant_p(e)) { \
+                       dispatch_static_assert(e); \
+               } else { \
+                       typeof(e) _e = (e); /* always eval 'e' */ \
+                       if (unlikely(DISPATCH_DEBUG && _e)) { \
+                               _dispatch_abort(__LINE__, (long)_e); \
+                       } \
+               } \

        } while (0)
        } while (0)

+#else
+static inline void
+_dispatch_assert_zero(long e, size_t line)
+{
+       if (DISPATCH_DEBUG && e) _dispatch_abort(line, e);
+}
+#define dispatch_assert_zero(e) _dispatch_assert_zero((long)(e), __LINE__)
+#endif /* __GNUC__ */

 
 /*
 
 /*

- * For reporting bugs or impedance mismatches between libdispatch and external subsystems.
- * These do NOT abort(), and are always compiled into the product.
+ * 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.
  */
  *
  * In particular, we wrap all system-calls with assume() macros.
  */

-#define dispatch_assume(e)     ({      \
-               typeof(e) _e = fastpath(e); /* always eval 'e' */       \
-               if (!_e) {      \
-                       if (__builtin_constant_p(e)) {  \
-                               char __compile_time_assert__[(e) ? 1 : -1];     \
-                               (void)__compile_time_assert__;  \
-                       }       \
-                       _dispatch_bug(__LINE__, (long)_e);      \
-               }       \
-               _e;     \
+#if __GNUC__
+#define dispatch_assume(e) ({ \
+               typeof(e) _e = (e); /* always eval 'e' */ \
+               if (unlikely(!_e)) { \
+                       if (__builtin_constant_p(e)) { \
+                               dispatch_static_assert(e); \
+                       } \
+                       _dispatch_bug(__LINE__, (long)_e); \
+               } \
+               _e; \

        })
        })

-/* A lot of API return zero upon success and not-zero on fail. Let's capture and log the non-zero value */
-#define dispatch_assume_zero(e)        ({      \
-               typeof(e) _e = slowpath(e); /* always eval 'e' */       \
-               if (_e) {       \
-                       if (__builtin_constant_p(e)) {  \
-                               char __compile_time_assert__[(e) ? -1 : 1];     \
-                               (void)__compile_time_assert__;  \
-                       }       \
-                       _dispatch_bug(__LINE__, (long)_e);      \
-               }       \
-               _e;     \
+#else
+static inline long
+_dispatch_assume(long e, long line)
+{
+       if (!e) _dispatch_bug(line, e);
+       return e;
+}
+#define dispatch_assume(e) _dispatch_assume((long)(e), __LINE__)
+#endif /* __GNUC__ */
+
+/*
+ * A lot of API return zero upon success and not-zero on fail. Let's capture
+ * and log the non-zero value
+ */
+#if __GNUC__
+#define dispatch_assume_zero(e) ({ \
+               typeof(e) _e = (e); /* always eval 'e' */ \
+               if (unlikely(_e)) { \
+                       if (__builtin_constant_p(e)) { \
+                               dispatch_static_assert(e); \
+                       } \
+                       _dispatch_bug(__LINE__, (long)_e); \
+               } \
+               _e; \

        })
        })

+#else
+static inline long
+_dispatch_assume_zero(long e, long line)
+{
+       if (e) _dispatch_bug(line, e);
+       return e;
+}
+#define dispatch_assume_zero(e) _dispatch_assume_zero((long)(e), __LINE__)
+#endif /* __GNUC__ */

 
 /*
  * For reporting bugs in clients when using the "_debug" version of the library.
  */
 
 /*
  * For reporting bugs in clients when using the "_debug" version of the library.
  */

-#define dispatch_debug_assert(e, msg, args...) do {    \
-               if (__builtin_constant_p(e)) {  \
-                       char __compile_time_assert__[(bool)(e) ? 1 : -1] __attribute__((unused));       \
-               } else {        \
-                       typeof(e) _e = fastpath(e); /* always eval 'e' */       \
-                       if (DISPATCH_DEBUG && !_e) {    \
-                               _dispatch_log("%s() 0x%lx: " msg, __func__, (long)_e, ##args);  \
-                               abort();        \
-                       }       \
-               }       \
+#if __GNUC__
+#define dispatch_debug_assert(e, msg, args...) do { \
+               if (__builtin_constant_p(e)) { \
+                       dispatch_static_assert(e); \
+               } else { \
+                       typeof(e) _e = (e); /* always eval 'e' */ \
+                       if (unlikely(DISPATCH_DEBUG && !_e)) { \
+                               _dispatch_log("%s() 0x%lx: " msg, __func__, (long)_e, ##args); \
+                               abort(); \
+                       } \
+               } \

        } while (0)
        } while (0)

+#else
+#define dispatch_debug_assert(e, msg, args...) do { \
+       typeof(e) _e = (e); /* always eval 'e' */ \
+       if (unlikely(DISPATCH_DEBUG && !_e)) { \
+               _dispatch_log("%s() 0x%lx: " msg, __FUNCTION__, _e, ##args); \
+               abort(); \
+       } \
+} while (0)
+#endif /* __GNUC__ */

 
 

+/* 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__
 
 #ifdef __BLOCKS__

-dispatch_block_t _dispatch_Block_copy(dispatch_block_t block);
+#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);
 void _dispatch_call_block_and_release(void *block);

-void _dispatch_call_block_and_release2(void *block, void *ctxt);

 #endif /* __BLOCKS__ */
 
 #endif /* __BLOCKS__ */
 

-void dummy_function(void);
-long dummy_function_r0(void);
+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);
+int _dispatch_sigmask(void);

 
 

+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

 
 

-/* Make sure the debug statments don't get too stale */
-#define _dispatch_debug(x, args...)    \
-({     \
-       if (DISPATCH_DEBUG) {   \
-               _dispatch_log("libdispatch: %u\t%p\t" x, __LINE__, _dispatch_thread_self(), ##args);    \
-       }       \
-})
+/* #includes dependent on internal.h */
+#include "shims.h"
+#include "event/event_internal.h"

 
 

+// Older Mac OS X and iOS Simulator fallbacks

 
 

-#if DISPATCH_DEBUG
-void dispatch_debug_kevents(struct kevent* kev, size_t count, const char* str);
+#if HAVE__PTHREAD_WORKQUEUE_INIT && PTHREAD_WORKQUEUE_SPI_VERSION >= 20140213 \
+               && !defined(HAVE_PTHREAD_WORKQUEUE_QOS)
+#define HAVE_PTHREAD_WORKQUEUE_QOS 1
+#endif
+#if HAVE__PTHREAD_WORKQUEUE_INIT && PTHREAD_WORKQUEUE_SPI_VERSION >= 20150304 \
+               && !defined(HAVE_PTHREAD_WORKQUEUE_KEVENT)
+#define HAVE_PTHREAD_WORKQUEUE_KEVENT 1
+#endif
+
+
+#ifndef HAVE_PTHREAD_WORKQUEUE_NARROWING
+#if !DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(109900)
+#define HAVE_PTHREAD_WORKQUEUE_NARROWING 0

 #else
 #else

-#define dispatch_debug_kevents(x, y, z)
+#define HAVE_PTHREAD_WORKQUEUE_NARROWING 1
+#endif

 #endif
 
 #endif
 

-uint64_t _dispatch_get_nanoseconds(void);
+#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 DISPATCH_USE_MEMORYPRESSURE_SOURCE
+#if __has_include(<malloc_private.h>)
+#include <malloc_private.h>
+#else
+extern void malloc_memory_event_handler(unsigned long);
+#endif // __has_include(<malloc_private.h)
+extern bool _dispatch_memory_warn;
+#endif

 
 

-void _dispatch_source_drain_kevent(struct kevent *);
+#if HAVE_PTHREAD_WORKQUEUE_KEVENT && defined(KEVENT_FLAG_WORKQ) && \
+               !defined(DISPATCH_USE_KEVENT_WORKQUEUE)
+#define DISPATCH_USE_KEVENT_WORKQUEUE 1
+#endif

 
 

-dispatch_source_t
-_dispatch_source_create2(dispatch_source_t ds,
-       dispatch_source_attr_t attr,
-       void *context,
-       dispatch_source_handler_function_t handler);
+#if (!DISPATCH_USE_KEVENT_WORKQUEUE || DISPATCH_DEBUG || DISPATCH_PROFILE) && \
+               !defined(DISPATCH_USE_MGR_THREAD)
+#define DISPATCH_USE_MGR_THREAD 1
+#endif

 
 

-void _dispatch_update_kq(const struct kevent *);
-void _dispatch_run_timers(void);
-// Returns howsoon with updated time value, or NULL if no timers active.
-struct timespec *_dispatch_get_next_timer_fire(struct timespec *howsoon);

 
 

-dispatch_semaphore_t _dispatch_get_thread_semaphore(void);
-void _dispatch_put_thread_semaphore(dispatch_semaphore_t);
+#if defined(MACH_SEND_SYNC_OVERRIDE) && defined(MACH_RCV_SYNC_WAIT) && \
+               DISPATCH_MIN_REQUIRED_OSX_AT_LEAST(109900) && \
+               !defined(DISPATCH_USE_MACH_SEND_SYNC_OVERRIDE)
+#define DISPATCH_USE_MACH_SEND_SYNC_OVERRIDE 1
+#endif

 
 

-bool _dispatch_source_testcancel(dispatch_source_t);
+#if defined(F_SETNOSIGPIPE) && defined(F_GETNOSIGPIPE)
+#ifndef DISPATCH_USE_SETNOSIGPIPE
+#define DISPATCH_USE_SETNOSIGPIPE 1
+#endif
+#endif // F_SETNOSIGPIPE

 
 

-uint64_t _dispatch_timeout(dispatch_time_t when);
+#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

 
 

-__private_extern__ bool _dispatch_safe_fork;

 
 

-__private_extern__ struct _dispatch_hw_config_s {
-       uint32_t cc_max_active;
-       uint32_t cc_max_logical;
-       uint32_t cc_max_physical;
-} _dispatch_hw_config;
+#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

 
 

-/* #includes dependent on internal.h */
-#include "object_internal.h"
-#include "hw_shims.h"
-#include "os_shims.h"
-#include "queue_internal.h"
-#include "semaphore_internal.h"
-#include "source_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;

 
 

+#include "provider.h"
+#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_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_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)
+
+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)
+
+#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_IOS && !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>
+
+#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)
+
+#if HAVE_MACH

 // MIG_REPLY_MISMATCH means either:
 // MIG_REPLY_MISMATCH means either:

-// 1) A signal handler is NOT using async-safe API. See the sigaction(2) man page for more info.
+// 1) A signal handler is NOT using async-safe API. See the sigaction(2) man
+//    page for more info.

 // 2) A hand crafted call to mach_msg*() screwed up. Use MIG.
 // 2) A hand crafted call to mach_msg*() screwed up. Use MIG.

-#define DISPATCH_VERIFY_MIG(x) do {    \
-               if ((x) == MIG_REPLY_MISMATCH) {        \
-                       __crashreporter_info__ = "MIG_REPLY_MISMATCH";  \
-                       _dispatch_hardware_crash();     \
-               }       \
+#define DISPATCH_VERIFY_MIG(x) do { \
+               if ((x) == MIG_REPLY_MISMATCH) { \
+                       _dispatch_set_crash_log_cause_and_message((x), \
+                                       "MIG_REPLY_MISMATCH"); \
+                       _dispatch_hardware_crash(); \
+               } \

        } while (0)
        } while (0)

+#endif

 
 

-#if defined(__x86_64__) || defined(__i386__)
-// total hack to ensure that return register of a function is not trashed
-#define DISPATCH_CRASH(x)      do {    \
-               asm("mov        %1, %0" : "=m" (__crashreporter_info__) : "c" ("BUG IN LIBDISPATCH: " x));      \
-               _dispatch_hardware_crash();     \
+#define DISPATCH_INTERNAL_CRASH(c, x) do { \
+               _dispatch_set_crash_log_cause_and_message((c), \
+                               "BUG IN LIBDISPATCH: " x); \
+               _dispatch_hardware_crash(); \

        } while (0)
 
        } while (0)
 

-#define DISPATCH_CLIENT_CRASH(x)       do {    \
-               asm("mov        %1, %0" : "=m" (__crashreporter_info__) : "c" ("BUG IN CLIENT OF LIBDISPATCH: " x));    \
-               _dispatch_hardware_crash();     \
+#define DISPATCH_CLIENT_CRASH(c, x) do { \
+               _dispatch_set_crash_log_cause_and_message((c), \
+                               "BUG IN CLIENT OF LIBDISPATCH: " x); \
+               _dispatch_hardware_crash(); \

        } while (0)
 
        } while (0)
 

-#else
+#define _OS_OBJECT_CLIENT_CRASH(x) do { \
+               _dispatch_set_crash_log_message("API MISUSE: " x); \
+               _dispatch_hardware_crash(); \
+       } while (0)

 
 

-#define DISPATCH_CRASH(x)      do {    \
-               __crashreporter_info__ = "BUG IN LIBDISPATCH: " x;      \
-               _dispatch_hardware_crash();     \
+#define DISPATCH_ASSERTION_FAILED_MESSAGE \
+               "BUG IN CLIENT OF LIBDISPATCH: Assertion failed: "
+
+#define _dispatch_assert_crash(msg)  do { \
+               const char *__msg = (msg); \
+               _dispatch_log("%s", __msg); \
+               _dispatch_set_crash_log_message_dynamic(__msg); \
+               _dispatch_hardware_crash(); \

        } while (0)
 
        } while (0)
 

-#define DISPATCH_CLIENT_CRASH(x)       do {    \
-               __crashreporter_info__ = "BUG IN CLIENT OF LIBDISPATCH: " x;    \
-               _dispatch_hardware_crash();     \
+#define _dispatch_client_assert_fail(fmt, ...)  do { \
+               char *_msg = NULL; \
+               asprintf(&_msg, "%s" fmt, DISPATCH_ASSERTION_FAILED_MESSAGE, \
+                               ##__VA_ARGS__); \
+               _dispatch_assert_crash(_msg); \
+               free(_msg); \

        } while (0)
 
        } while (0)
 

+#define DISPATCH_NO_VOUCHER ((voucher_t)(void*)~0ul)
+#define DISPATCH_NO_PRIORITY ((pthread_priority_t)~0ul)
+DISPATCH_ENUM(dispatch_thread_set_self, unsigned long,
+       DISPATCH_PRIORITY_ENFORCE = 0x1,
+       DISPATCH_VOUCHER_REPLACE = 0x2,
+       DISPATCH_VOUCHER_CONSUME = 0x4,
+       DISPATCH_THREAD_PARK = 0x8,
+);
+DISPATCH_WARN_RESULT
+static inline voucher_t _dispatch_adopt_priority_and_set_voucher(
+               pthread_priority_t priority, voucher_t voucher,
+               dispatch_thread_set_self_t flags);
+#if HAVE_MACH
+mach_port_t _dispatch_get_mach_host_port(void);
+#endif
+
+#if HAVE_PTHREAD_WORKQUEUE_QOS
+#if DISPATCH_DEBUG
+extern int _dispatch_set_qos_class_enabled;
+#else
+#define _dispatch_set_qos_class_enabled (1)

 #endif
 #endif

+#endif // HAVE_PTHREAD_WORKQUEUE_QOS
+#if DISPATCH_USE_KEVENT_WORKQUEUE
+#if !HAVE_PTHREAD_WORKQUEUE_QOS || !EV_UDATA_SPECIFIC
+#error Invalid build configuration
+#endif
+#if DISPATCH_USE_MGR_THREAD
+extern int _dispatch_kevent_workqueue_enabled;
+#else
+#define _dispatch_kevent_workqueue_enabled (1)
+#endif
+#else
+#define _dispatch_kevent_workqueue_enabled (0)
+#endif // DISPATCH_USE_KEVENT_WORKQUEUE
+

 
 

+/* #includes dependent on internal.h */
+#include "object_internal.h"
+#include "semaphore_internal.h"
+#include "introspection_internal.h"
+#include "queue_internal.h"
+#include "source_internal.h"
+#include "mach_internal.h"
+#include "voucher_internal.h"
+#include "data_internal.h"
+#if !TARGET_OS_WIN32
+#include "io_internal.h"
+#endif
+#include "inline_internal.h"
+#include "firehose/firehose_internal.h"

 
 #endif /* __DISPATCH_INTERNAL__ */
 
 #endif /* __DISPATCH_INTERNAL__ */