internal/os/internal.h

   1 /*
   2  * Copyright (c) 2013 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_APACHE_LICENSE_HEADER_START@
   5  *
   6  * Licensed under the Apache License, Version 2.0 (the "License");
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  *
  18  * @APPLE_APACHE_LICENSE_HEADER_END@
  19  */
  20
  21 #ifndef __OS_INTERNAL_H__
  22 #define __OS_INTERNAL_H__
  23
  24 #define __OS_ALLOC_INDIRECT__
  25
  26 #include <TargetConditionals.h>
  27 #include <machine/cpu_capabilities.h>
  28
  29 #include "os/base_private.h"
  30 #include "os/semaphore_private.h"
  31
  32 #include <stddef.h>
  33 #include <stdint.h>
  34 #include <stdbool.h>
  35 #include <limits.h>
  36 #if defined(__arm__)
  37 #include <arm/arch.h>
  38 #endif
  39 #include <mach/thread_switch.h>
  40
  41 #define likely(x) os_likely(x)
  42 #define unlikely(x) os_unlikely(x)
  43
  44 #define __OS_CRASH__(rc, msg)  ({ \
  45                 _os_set_crash_log_cause_and_message(rc, msg); \
  46                 os_prevent_tail_call_optimization(); \
  47                 __builtin_trap(); \
  48         })
  49
  50 #define __LIBPLATFORM_CLIENT_CRASH__(rc, msg) \
  51                 __OS_CRASH__(rc, "BUG IN CLIENT OF LIBPLATFORM: " msg)
  52 #define __LIBPLATFORM_INTERNAL_CRASH__(rc, msg) \
  53                 __OS_CRASH__(rc, "BUG IN LIBPLATFORM: " msg)
  54
  55 #define __OS_EXPOSE_INTERNALS__ 1
  56 #include "os/internal/internal_shared.h"
  57 #include "yield.h"
  58
  59 #define OS_NOEXPORT extern __attribute__((__visibility__("hidden")))
  60
  61 #define OS_VARIANT(f, v) OS_CONCAT(f, OS_CONCAT($VARIANT$, v))
  62
  63 #define _OS_ATOMIC_ALIAS_PRIVATE_EXTERN(n)
  64 #define OS_ATOMIC_EXPORT OS_EXPORT
  65 #define _OS_ATOMIC_ALIAS_GLOBL(n) \
  66                 ".globl _" OS_STRINGIFY(n) "\n\t"
  67 #ifdef __thumb__
  68 #define _OS_ATOMIC_ALIAS_THUMB(n) \
  69                 ".thumb_func _" OS_STRINGIFY(n) "\n\t"
  70 #else
  71 #define _OS_ATOMIC_ALIAS_THUMB(n)
  72 #endif
  73 #define _OS_ATOMIC_ALIAS_SET(n, o) \
  74                 ".set _" OS_STRINGIFY(n) ", _" OS_STRINGIFY(o)
  75
  76 #define OS_ATOMIC_ALIAS(n, o) __asm__( \
  77                 _OS_ATOMIC_ALIAS_PRIVATE_EXTERN(n) \
  78                 _OS_ATOMIC_ALIAS_GLOBL(n) \
  79                 _OS_ATOMIC_ALIAS_THUMB(n) \
  80                 _OS_ATOMIC_ALIAS_SET(n, o))
  81
  82 #define OS_ATOMIC_EXPORT_ALIAS(n, o) __asm__( \
  83                 _OS_ATOMIC_ALIAS_GLOBL(n) \
  84                 _OS_ATOMIC_ALIAS_THUMB(n) \
  85                 _OS_ATOMIC_ALIAS_SET(n, o))
  86
  87 #define _OS_VARIANT_RESOLVER(s, v, ...) \
  88         __attribute__((visibility(OS_STRINGIFY(v)))) extern void* s(void); \
  89         void* s(void) { \
  90         __asm__(".symbol_resolver _" OS_STRINGIFY(s)); \
  91                 __VA_ARGS__ \
  92         }
  93
  94 #endif // __OS_INTERNAL_H__