2 * support for dynamic binding from C
6 * This software is part of the SBCL system. See the README file for
9 * This software is derived from the CMU CL system, which was
10 * written at Carnegie Mellon University and released into the
11 * public domain. The software is in the public domain and is
12 * provided with absolutely no warranty. See the COPYING and CREDITS
13 * files for more information.
21 #include "genesis/symbol.h"
22 #include "genesis/binding.h"
23 #include "genesis/thread.h"
25 #if defined(LISP_FEATURE_X86)
26 #define GetBSP() ((struct binding *)SymbolValue(BINDING_STACK_POINTER,thread))
27 #define SetBSP(value) SetSymbolValue(BINDING_STACK_POINTER, (lispobj)(value),thread)
29 #define GetBSP() ((struct binding *)current_binding_stack_pointer)
30 #define SetBSP(value) (current_binding_stack_pointer=(lispobj *)(value))
33 void bind_variable(lispobj symbol
, lispobj value
, void *th
)
36 struct binding
*binding
;
37 struct thread
*thread
=(struct thread
*)th
;
38 struct symbol
*sym
=(struct symbol
*)native_pointer(symbol
);
41 #ifdef LISP_FEATURE_SB_THREAD
43 sym
->tls_index
=SymbolValue(FREE_TLS_INDEX
,0);
44 SetSymbolValue(FREE_TLS_INDEX
,
45 make_fixnum(fixnum_value(sym
->tls_index
)+1),0);
48 old_tl_value
=SymbolTlValue(symbol
,thread
);
49 binding
->value
= old_tl_value
;
50 binding
->symbol
= symbol
;
51 SetTlSymbolValue(symbol
, value
,thread
);
57 struct thread
*thread
=(struct thread
*)th
;
58 struct binding
*binding
;
61 binding
= GetBSP() - 1;
63 symbol
= binding
->symbol
;
65 SetTlSymbolValue(symbol
, binding
->value
,thread
);
73 unbind_to_here(lispobj
*bsp
,void *th
)
75 struct thread
*thread
=(struct thread
*)th
;
76 struct binding
*target
= (struct binding
*)bsp
;
77 struct binding
*binding
= GetBSP();
80 while (target
< binding
) {
83 symbol
= binding
->symbol
;
85 SetTlSymbolValue(symbol
, binding
->value
,thread
);