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(BINDING_STACK_POINTER)
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 #ifdef LISP_FEATURE_SB_THREAD
39 struct symbol *sym=(struct symbol *)native_pointer(symbol);
43 #ifdef LISP_FEATURE_SB_THREAD
45 sym->tls_index=SymbolValue(FREE_TLS_INDEX,0);
46 SetSymbolValue(FREE_TLS_INDEX,
47 make_fixnum(fixnum_value(sym->tls_index)+1),0);
50 old_tl_value=SymbolTlValue(symbol,thread);
51 binding->value = old_tl_value;
52 binding->symbol = symbol;
53 SetTlSymbolValue(symbol, value,thread);
59 struct thread *thread=(struct thread *)th;
60 struct binding *binding;
63 binding = GetBSP() - 1;
65 symbol = binding->symbol;
67 SetTlSymbolValue(symbol, binding->value,thread);
75 unbind_to_here(lispobj *bsp,void *th)
77 struct thread *thread=(struct thread *)th;
78 struct binding *target = (struct binding *)bsp;
79 struct binding *binding = GetBSP();
82 while (target < binding) {
85 symbol = binding->symbol;
87 SetTlSymbolValue(symbol, binding->value,thread);