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 #error "threading doesn't work with cheney gc yet"
  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 #define for_each_thread(th) for(th=all_threads;th;th=th->next)
  33
  34 static inline lispobj SymbolValue(u32 tagged_symbol_pointer, void *thread) {
  35     struct symbol *sym= (struct symbol *)
  36         (tagged_symbol_pointer-OTHER_POINTER_LOWTAG);
  37     if(thread && sym->tls_index) {
  38         lispobj r=
  39             ((union per_thread_data *)thread)
  40             ->dynamic_values[fixnum_value(sym->tls_index)];
  41         if(r!=UNBOUND_MARKER_WIDETAG) return r;
  42     }
  43     return sym->value;
  44 }
  45 static inline lispobj SymbolTlValue(u32 tagged_symbol_pointer, void *thread) {
  46     struct symbol *sym= (struct symbol *)
  47         (tagged_symbol_pointer-OTHER_POINTER_LOWTAG);
  48     return ((union per_thread_data *)thread)
  49         ->dynamic_values[fixnum_value(sym->tls_index)];
  50 }
  51
  52 static inline void SetSymbolValue(u32 tagged_symbol_pointer,lispobj val, void *thread) {
  53     struct symbol *sym= (struct symbol *)
  54         (tagged_symbol_pointer-OTHER_POINTER_LOWTAG);
  55     if(thread && sym->tls_index) {
  56         lispobj *pr= &(((union per_thread_data *)thread)
  57                        ->dynamic_values[fixnum_value(sym->tls_index)]);
  58         if(*pr!= UNBOUND_MARKER_WIDETAG) {
  59             *pr=val;
  60             return;
  61         }
  62     }
  63     sym->value = val;
  64 }
  65 static inline void SetTlSymbolValue(u32 tagged_symbol_pointer,lispobj val, void *thread) {
  66     struct symbol *sym= (struct symbol *)
  67         (tagged_symbol_pointer-OTHER_POINTER_LOWTAG);
  68     ((union per_thread_data *)thread)
  69         ->dynamic_values[fixnum_value(sym->tls_index)]
  70         =val;
  71 }
  72
  73
  74
  75 #endif /* _INCLUDE_THREAD_H_ */