src/runtime/globals.h

   1 /*
   2  * This software is part of the SBCL system. See the README file for
   3  * more information.
   4  *
   5  * This software is derived from the CMU CL system, which was
   6  * written at Carnegie Mellon University and released into the
   7  * public domain. The software is in the public domain and is
   8  * provided with absolutely no warranty. See the COPYING and CREDITS
   9  * files for more information.
  10  */
  11
  12 #ifndef _INCLUDED_GLOBALS_H_
  13 #define _INCLUDED_GLOBALS_H_
  14
  15 #ifndef LANGUAGE_ASSEMBLY
  16 # include <sys/types.h>
  17 # include <unistd.h>
  18 # include "runtime.h"
  19 #endif
  20
  21 #include "sbcl.h"
  22
  23 /* Currently threads live only on x86oid platforms, but this thing
  24  * cannot ever work with threads, so... */
  25 #if !defined(LISP_FEATURE_SB_THREAD) && !defined(LISP_FEATURE_X86) && !defined(LISP_FEATURE_X86_64)
  26 #define FOREIGN_FUNCTION_CALL_FLAG
  27 #endif
  28
  29 #ifndef LANGUAGE_ASSEMBLY
  30
  31 #ifdef FOREIGN_FUNCTION_CALL_FLAG
  32 extern int foreign_function_call_active;
  33 #endif
  34
  35 extern size_t dynamic_space_size;
  36
  37 #ifdef LISP_FEATURE_WIN32
  38 #define ENVIRON _environ
  39 #else
  40 #define ENVIRON environ
  41 #endif
  42 extern char **ENVIRON;
  43
  44 #if defined(LISP_FEATURE_SB_THREAD) && !defined(LISP_FEATURE_GCC_TLS)
  45 extern pthread_key_t specials;
  46 #endif
  47
  48 extern lispobj *current_control_stack_pointer;
  49 extern lispobj *current_control_frame_pointer;
  50 # if !defined(LISP_FEATURE_X86) && !defined(LISP_FEATURE_X86_64)
  51 extern lispobj *current_binding_stack_pointer;
  52 # endif
  53
  54 #if !defined(LISP_FEATURE_X86) && !defined(LISP_FEATURE_X86_64)
  55 /* This is unused on X86 and X86_64, but is used as the global
  56  *  allocation pointer by the cheney GC, and, in some instances, as
  57  *  the global allocation pointer on PPC/GENCGC. This should probably
  58  *  be cleaned up such that it only needs to exist on cheney. At the
  59  *  moment, it is also used by the GENCGC, to hold the pseudo_atomic
  60  *  bits, and is tightly coupled to reg_ALLOC by the assembly
  61  *  routines. */
  62 extern lispobj *dynamic_space_free_pointer;
  63 #endif
  64
  65 # ifndef LISP_FEATURE_GENCGC
  66 extern lispobj *current_auto_gc_trigger;
  67 # endif
  68
  69 extern lispobj *current_dynamic_space;
  70
  71 extern void globals_init(void);
  72
  73 #else /* LANGUAGE_ASSEMBLY */
  74
  75 # ifdef LISP_FEATURE_MIPS
  76 #  ifdef __linux__
  77 #   define EXTERN(name,bytes) .globl name
  78 #  else
  79 #   define EXTERN(name,bytes) .extern name bytes
  80 #  endif
  81 # endif
  82 /**/
  83 # ifdef LISP_FEATURE_SPARC
  84 #  ifdef SVR4
  85 #   define EXTERN(name,bytes) .global name
  86 #  else
  87 #   define EXTERN(name,bytes) .global _ ## name
  88 #  endif
  89 # endif
  90 /**/
  91 # ifdef LISP_FEATURE_ALPHA
  92 #  ifdef __linux__
  93 #   define EXTERN(name,bytes) .globl name
  94 #  endif
  95 # endif
  96 /**/
  97 # ifdef LISP_FEATURE_PPC
  98 #  ifdef LISP_FEATURE_DARWIN
  99 #   define EXTERN(name,bytes) .globl _/**/name
 100 #  else
 101 #   define EXTERN(name,bytes) .globl name
 102 #  endif
 103 # endif
 104 /**/
 105 # if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
 106 #  define EXTERN(name,bytes) .global name
 107 # endif
 108
 109 # if defined(LISP_FEATURE_ALPHA) || defined(LISP_FEATURE_X86_64)
 110 #  define POINTERSIZE 8
 111 # else
 112 #  define POINTERSIZE 4
 113 # endif
 114
 115 #ifdef FOREIGN_FUNCTION_CALL_FLAG
 116 EXTERN(foreign_function_call_active, 4)
 117 #endif
 118
 119 EXTERN(current_control_stack_pointer, POINTERSIZE)
 120 EXTERN(current_control_frame_pointer, POINTERSIZE)
 121 # if !defined(LISP_FEATURE_X86) && !defined(LISP_FEATURE_X86_64)
 122 EXTERN(current_binding_stack_pointer, POINTERSIZE)
 123 # endif
 124 # ifndef LISP_FEATURE_GENCGC
 125 EXTERN(dynamic_space_free_pointer, POINTERSIZE)
 126 # endif
 127
 128 #endif /* LANGUAGE_ASSEMBLY */
 129
 130 #endif /* _INCLUDED_GLOBALS_H_ */