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"
24 #include "genesis/static-symbols.h"
26 #if defined(BINDING_STACK_POINTER)
27 #define GetBSP() ((struct binding *)SymbolValue(BINDING_STACK_POINTER,thread))
28 #define SetBSP(value) SetSymbolValue(BINDING_STACK_POINTER, (lispobj)(value),thread)
30 #define GetBSP() ((struct binding *)current_binding_stack_pointer)
31 #define SetBSP(value) (current_binding_stack_pointer=(lispobj *)(value))
34 void bind_variable(lispobj symbol, lispobj value, void *th)
36 struct binding *binding;
37 struct thread *thread=(struct thread *)th;
40 #ifdef LISP_FEATURE_SB_THREAD
42 struct symbol *sym=(struct symbol *)native_pointer(symbol);
44 lispobj *tls_index_lock=
45 &((struct symbol *)native_pointer(TLS_INDEX_LOCK))->value;
46 SetSymbolValue(PSEUDO_ATOMIC_INTERRUPTED, make_fixnum(0),th);
47 SetSymbolValue(PSEUDO_ATOMIC_ATOMIC, make_fixnum(1),th);
48 get_spinlock(tls_index_lock,(long)th);
50 sym->tls_index=SymbolValue(FREE_TLS_INDEX,0);
51 SetSymbolValue(FREE_TLS_INDEX,
52 make_fixnum(fixnum_value(sym->tls_index)+1),0);
54 release_spinlock(tls_index_lock);
55 SetSymbolValue(PSEUDO_ATOMIC_ATOMIC, make_fixnum(0),th);
56 if (fixnum_value(SymbolValue(PSEUDO_ATOMIC_INTERRUPTED,th)))
57 do_pending_interrupt();
61 binding->value = SymbolTlValue(symbol, thread);
62 binding->symbol = symbol;
63 SetTlSymbolValue(symbol, value, thread);
69 struct thread *thread=(struct thread *)th;
70 struct binding *binding;
73 binding = GetBSP() - 1;
75 symbol = binding->symbol;
77 SetTlSymbolValue(symbol, binding->value,thread);
85 unbind_to_here(lispobj *bsp,void *th)
87 struct thread *thread=(struct thread *)th;
88 struct binding *target = (struct binding *)bsp;
89 struct binding *binding = GetBSP();
92 while (target < binding) {
95 symbol = binding->symbol;
97 SetTlSymbolValue(symbol, binding->value,thread);