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 "pseudo-atomic.h"
22 #include "genesis/symbol.h"
23 #include "genesis/binding.h"
24 #include "genesis/thread.h"
25 #include "genesis/static-symbols.h"
27 #if defined(BINDING_STACK_POINTER)
28 #define GetBSP() ((struct binding *)SymbolValue(BINDING_STACK_POINTER,thread))
29 #define SetBSP(value) SetSymbolValue(BINDING_STACK_POINTER, (lispobj)(value),thread)
31 #define GetBSP() ((struct binding *)current_binding_stack_pointer)
32 #define SetBSP(value) (current_binding_stack_pointer=(lispobj *)(value))
35 void bind_variable(lispobj symbol
, lispobj value
, void *th
)
37 struct binding
*binding
;
38 struct thread
*thread
=(struct thread
*)th
;
41 #ifdef LISP_FEATURE_SB_THREAD
43 struct symbol
*sym
=(struct symbol
*)native_pointer(symbol
);
45 lispobj
*tls_index_lock
=
46 &((struct symbol
*)native_pointer(TLS_INDEX_LOCK
))->value
;
47 clear_pseudo_atomic_interrupted(th
);
48 set_pseudo_atomic_atomic(th
);
49 get_spinlock(tls_index_lock
,(long)th
);
51 sym
->tls_index
=SymbolValue(FREE_TLS_INDEX
,0);
52 SetSymbolValue(FREE_TLS_INDEX
,
53 make_fixnum(fixnum_value(sym
->tls_index
)+1),0);
55 release_spinlock(tls_index_lock
);
56 clear_pseudo_atomic_atomic(th
);
57 if (get_pseudo_atomic_interrupted(th
))
58 do_pending_interrupt();
62 binding
->value
= SymbolTlValue(symbol
, thread
);
63 binding
->symbol
= symbol
;
64 SetTlSymbolValue(symbol
, value
, thread
);
70 struct thread
*thread
=(struct thread
*)th
;
71 struct binding
*binding
;
74 binding
= GetBSP() - 1;
76 symbol
= binding
->symbol
;
78 SetTlSymbolValue(symbol
, binding
->value
,thread
);
86 unbind_to_here(lispobj
*bsp
,void *th
)
88 struct thread
*thread
=(struct thread
*)th
;
89 struct binding
*target
= (struct binding
*)bsp
;
90 struct binding
*binding
= GetBSP();
93 while (target
< binding
) {
96 symbol
= binding
->symbol
;
98 if (symbol
!= UNBOUND_MARKER_WIDETAG
) {
99 SetTlSymbolValue(symbol
, binding
->value
,thread
);