src/runtime/thread.h

   1
   2 #if !defined(_INCLUDE_THREAD_H_)
   3 #define _INCLUDE_THREAD_H_
   4
   5 #include <sys/types.h>
   6 #include <unistd.h>
   7 #include "runtime.h"
   8 #include "sbcl.h"
   9 #include "os.h"
  10 #include "interrupt.h"
  11 #ifdef LISP_FEATURE_GENCGC
  12 #include "gencgc-alloc-region.h"
  13 #else
  14 struct alloc_region { };
  15 #endif
  16 #include "genesis/symbol.h"
  17 #include "genesis/static-symbols.h"
  18 #include "genesis/thread.h"
  19
  20 #define THREAD_SLOT_OFFSET_WORDS(c) \
  21  (offsetof(struct thread,c)/(sizeof (struct thread *)))
  22
  23 union per_thread_data {
  24     struct thread thread;
  25     lispobj dynamic_values[1];  /* actually more like 4000 or so */
  26 };
  27
  28 extern struct thread *all_threads;
  29 extern int dynamic_values_bytes;
  30 extern struct thread *find_thread_by_pid(pid_t pid);
  31
  32 #ifdef LISP_FEATURE_SB_THREAD
  33 #define for_each_thread(th) for(th=all_threads;th;th=th->next)
  34 #else
  35 /* there's some possibility a SSC could notice this never actually
  36  * loops  */
  37 #define for_each_thread(th) for(th=all_threads;th;th=0)
  38 #endif
  39
  40 static inline lispobj SymbolValue(u32 tagged_symbol_pointer, void *thread) {
  41     struct symbol *sym= (struct symbol *)
  42         (tagged_symbol_pointer-OTHER_POINTER_LOWTAG);
  43 #ifdef LISP_FEATURE_SB_THREAD
  44     if(thread && sym->tls_index) {
  45         lispobj r=
  46             ((union per_thread_data *)thread)
  47             ->dynamic_values[fixnum_value(sym->tls_index)];
  48         if(r!=UNBOUND_MARKER_WIDETAG) return r;
  49     }
  50 #endif
  51     return sym->value;
  52 }
  53 static inline lispobj SymbolTlValue(u32 tagged_symbol_pointer, void *thread) {
  54     struct symbol *sym= (struct symbol *)
  55         (tagged_symbol_pointer-OTHER_POINTER_LOWTAG);
  56 #ifdef LISP_FEATURE_SB_THREAD
  57     return ((union per_thread_data *)thread)
  58         ->dynamic_values[fixnum_value(sym->tls_index)];
  59 #else
  60     return sym->value;
  61 #endif
  62 }
  63
  64 static inline void SetSymbolValue(u32 tagged_symbol_pointer,lispobj val, void *thread) {
  65     struct symbol *sym= (struct symbol *)
  66         (tagged_symbol_pointer-OTHER_POINTER_LOWTAG);
  67 #ifdef LISP_FEATURE_SB_THREAD
  68     if(thread && sym->tls_index) {
  69         lispobj *pr= &(((union per_thread_data *)thread)
  70                        ->dynamic_values[fixnum_value(sym->tls_index)]);
  71         if(*pr!= UNBOUND_MARKER_WIDETAG) {
  72             *pr=val;
  73             return;
  74         }
  75     }
  76 #endif
  77     sym->value = val;
  78 }
  79 static inline void SetTlSymbolValue(u32 tagged_symbol_pointer,lispobj val, void *thread) {
  80 #ifdef LISP_FEATURE_SB_THREAD
  81     struct symbol *sym= (struct symbol *)
  82         (tagged_symbol_pointer-OTHER_POINTER_LOWTAG);
  83     ((union per_thread_data *)thread)
  84         ->dynamic_values[fixnum_value(sym->tls_index)]
  85         =val;
  86 #else
  87     SetSymbolValue(tagged_symbol_pointer,val,thread) ;
  88 #endif
  89 }
  90
  91
  92
  93 #endif /* _INCLUDE_THREAD_H_ */