Utility predicates for packing: UNBOUNDED-SC-P and UNBOUNDED-TN-P

[sbcl.git] / src / runtime / dynbind.c

diff --git a/src/runtime/dynbind.c b/src/runtime/dynbind.c
index 8a3a548..d89bc7d 100644 (file)
--- a/src/runtime/dynbind.c
+++ b/src/runtime/dynbind.c
@@ -1,5 +1,6 @@
 /*
  * support for dynamic binding from C
+ * See the "Chapter 9: Specials" of the SBCL Internals Manual.
  */
 
 /*
@@ -13,67 +14,107 @@
  * files for more information.
  */
 
-#include "runtime.h"
+#include <stdio.h>
+#include <stdlib.h>
+
 #include "sbcl.h"
+#include "runtime.h"
 #include "globals.h"
 #include "dynbind.h"
+#include "thread.h"
+#include "pseudo-atomic.h"
+#include "genesis/symbol.h"
+#include "genesis/binding.h"
+#include "genesis/static-symbols.h"
 
-#if defined(__i386__)
-#define GetBSP() ((struct binding *)SymbolValue(BINDING_STACK_POINTER))
-#define SetBSP(value) SetSymbolValue(BINDING_STACK_POINTER, (lispobj)(value))
+void bind_variable(lispobj symbol, lispobj value, void *th)
+{
+    struct binding *binding;
+    struct thread *thread=(struct thread *)th;
+    binding = (struct binding *)get_binding_stack_pointer(thread);
+    set_binding_stack_pointer(thread,binding+1);
+#ifdef LISP_FEATURE_SB_THREAD
+    {
+        struct symbol *sym=(struct symbol *)native_pointer(symbol);
+        if(!sym->tls_index) {
+            lispobj *tls_index_lock=
+                &((struct symbol *)native_pointer(TLS_INDEX_LOCK))->value;
+            FSHOW_SIGNAL((stderr, "entering dynbind tls alloc\n"));
+            set_pseudo_atomic_atomic(thread);
+            get_spinlock(tls_index_lock,(uword_t)th);
+            if(!sym->tls_index) {
+                sym->tls_index=SymbolValue(FREE_TLS_INDEX,0);
+                SetSymbolValue(FREE_TLS_INDEX, sym->tls_index+N_WORD_BYTES, 0);
+                if((sym->tls_index)>=(TLS_SIZE << WORD_SHIFT)) {
+                    lose("Thread local storage exhausted.");
+                }
+            }
+            release_spinlock(tls_index_lock);
+            FSHOW_SIGNAL((stderr, "exiting dynbind tls alloc\n"));
+            clear_pseudo_atomic_atomic(thread);
+            if (get_pseudo_atomic_interrupted(thread))
+                do_pending_interrupt();
+        }
+        binding->symbol = sym->tls_index;
+        binding->value = SymbolTlValue(symbol, thread);
+    }
 #else
-#define GetBSP() ((struct binding *)current_binding_stack_pointer)
-#define SetBSP(value) (current_binding_stack_pointer=(lispobj *)(value))
+    binding->symbol = symbol;
+    binding->value = SymbolTlValue(symbol, thread);
 #endif
+    SetTlSymbolValue(symbol, value, thread);
+}
 
-void bind_variable(lispobj symbol, lispobj value)
+void
+unbind(void *th)
 {
-       lispobj old_value;
-       struct binding *binding;
+    struct thread *thread=(struct thread *)th;
+    struct binding *binding;
+    lispobj symbol;
 
-       old_value = SymbolValue(symbol);
-       binding = GetBSP();
-       SetBSP(binding+1);
+    binding = ((struct binding *)get_binding_stack_pointer(thread)) - 1;
 
-       binding->value = old_value;
-       binding->symbol = symbol;
-       SetSymbolValue(symbol, value);
-}
+    /* On sb-thread, it's actually a tls-index */
+    symbol = binding->symbol;
 
-void
-unbind(void)
-{
-       struct binding *binding;
-       lispobj symbol;
-       
-       binding = GetBSP() - 1;
-               
-       symbol = binding->symbol;
+#ifdef LISP_FEATURE_SB_THREAD
 
-       SetSymbolValue(symbol, binding->value);
+    ((union per_thread_data *)thread)->dynamic_values[(symbol) >> WORD_SHIFT]
+        = binding->value;
+#else
+    SetSymbolValue(symbol, binding->value, thread);
+#endif
 
-       binding->symbol = 0;
+    binding->symbol = 0;
+    binding->value = 0;
 
-       SetBSP(binding);
+    set_binding_stack_pointer(thread,binding);
 }
 
 void
-unbind_to_here(lispobj *bsp)
+unbind_to_here(lispobj *bsp,void *th)
 {
+    struct thread *thread=(struct thread *)th;
     struct binding *target = (struct binding *)bsp;
-    struct binding *binding = GetBSP();
+    struct binding *binding = (struct binding *)get_binding_stack_pointer(thread);
     lispobj symbol;
 
     while (target < binding) {
-       binding--;
-
-       symbol = binding->symbol;
-
-       if (symbol) {
-           SetSymbolValue(symbol, binding->value);
-           binding->symbol = 0;
-       }
+        binding--;
 
+        symbol = binding->symbol;
+        if (symbol) {
+            if (symbol != UNBOUND_MARKER_WIDETAG) {
+#ifdef LISP_FEATURE_SB_THREAD
+                ((union per_thread_data *)thread)->dynamic_values[(symbol) >> WORD_SHIFT]
+                    = binding->value;
+#else
+                SetSymbolValue(symbol, binding->value, thread);
+#endif
+            }
+            binding->symbol = 0;
+            binding->value = 0;
+        }
     }
-    SetBSP(binding);
+    set_binding_stack_pointer(thread,binding);
 }