1: 
    2: #ifndef RUBY_GC_H
    3: #define RUBY_GC_H 1
    4: 
    5: #if defined(__i386) && defined(__GNUC__)
    6: #define SET_MACHINE_STACK_END(p) __asm__("mov %%esp, %0" : "=r" (*p))
    7: #else
    8: NOINLINE(void rb_gc_set_stack_end(VALUE **stack_end_p));
    9: #define SET_MACHINE_STACK_END(p) rb_gc_set_stack_end(p)
   10: #define USE_CONSERVATIVE_STACK_END
   11: #endif
   12: 
   13: /* for GC debug */
   14: 
   15: #ifndef RUBY_MARK_FREE_DEBUG
   16: #define RUBY_MARK_FREE_DEBUG 0
   17: #endif
   18: 
   19: #if RUBY_MARK_FREE_DEBUG
   20: extern int ruby_gc_debug_indent;
   21: 
   22: static void
   23: rb_gc_debug_indent(void)
   24: {
   25:     printf("%*s", ruby_gc_debug_indent, "");
   26: }
   27: 
   28: static void
   29: rb_gc_debug_body(char *mode, char *msg, int st, void *ptr)
   30: {
   31:     if (st == 0) {
   32:         ruby_gc_debug_indent--;
   33:     }
   34:     rb_gc_debug_indent();
   35:     printf("%s: %s %s (%p)\n", mode, st ? "->" : "<-", msg, ptr);
   36: 
   37:     if (st) {
   38:         ruby_gc_debug_indent++;
   39:     }
   40: 
   41:     fflush(stdout);
   42: }
   43: 
   44: #define RUBY_MARK_ENTER(msg) rb_gc_debug_body("mark", msg, 1, ptr)
   45: #define RUBY_MARK_LEAVE(msg) rb_gc_debug_body("mark", msg, 0, ptr)
   46: #define RUBY_FREE_ENTER(msg) rb_gc_debug_body("free", msg, 1, ptr)
   47: #define RUBY_FREE_LEAVE(msg) rb_gc_debug_body("free", msg, 0, ptr)
   48: #define RUBY_GC_INFO         rb_gc_debug_indent(); printf
   49: 
   50: #else
   51: #define RUBY_MARK_ENTER(msg)
   52: #define RUBY_MARK_LEAVE(msg)
   53: #define RUBY_FREE_ENTER(msg)
   54: #define RUBY_FREE_LEAVE(msg)
   55: #define RUBY_GC_INFO if(0)printf
   56: #endif
   57: 
   58: #define RUBY_MARK_UNLESS_NULL(ptr) if(RTEST(ptr)){rb_gc_mark(ptr);}
   59: #define RUBY_FREE_UNLESS_NULL(ptr) if(ptr){ruby_xfree(ptr);}
   60: #endif /* RUBY_GC_H */
   61: